Bug Summary

File:build-scan/../src/shared/dissect-image.c
Warning:line 370, column 33
Potential leak of memory pointed to by 'generic_node'

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name dissect-image.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -menable-no-infs -menable-no-nans -menable-unsafe-fp-math -fno-signed-zeros -mreassociate -freciprocal-math -fdenormal-fp-math=preserve-sign,preserve-sign -ffp-contract=fast -fno-rounding-math -ffast-math -ffinite-math-only -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/12.0.0 -include config.h -I src/shared/libsystemd-shared-239.a.p -I src/shared -I ../src/shared -I src/basic -I ../src/basic -I src/systemd -I ../src/systemd -I src/journal -I ../src/journal -I src/journal-remote -I ../src/journal-remote -I src/nspawn -I ../src/nspawn -I src/resolve -I ../src/resolve -I src/timesync -I ../src/timesync -I ../src/time-wait-sync -I src/login -I ../src/login -I src/udev -I ../src/udev -I src/libudev -I ../src/libudev -I src/core -I ../src/core -I ../src/libsystemd/sd-bus -I ../src/libsystemd/sd-device -I ../src/libsystemd/sd-hwdb -I ../src/libsystemd/sd-id128 -I ../src/libsystemd/sd-netlink -I ../src/libsystemd/sd-network -I src/libsystemd-network -I ../src/libsystemd-network -I . -I .. -I /usr/include/blkid -D _FILE_OFFSET_BITS=64 -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/12.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wwrite-strings -Wno-unused-parameter -Wno-missing-field-initializers -Wno-unused-result -Wno-format-signedness -Wno-error=nonnull -std=gnu99 -fconst-strings -fdebug-compilation-dir /home/mrc0mmand/repos/@redhat-plumbers/systemd-rhel8/build-scan -ferror-limit 19 -fvisibility default -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -analyzer-output=html -faddrsig -o /tmp/scan-build-2021-07-16-221226-1465241-1 -x c ../src/shared/dissect-image.c
1/* SPDX-License-Identifier: LGPL-2.1+ */
2
3#include <sys/mount.h>
4#include <sys/prctl.h>
5#include <sys/wait.h>
6
7#include "sd-id128.h"
8
9#include "architecture.h"
10#include "ask-password-api.h"
11#include "blkid-util.h"
12#include "blockdev-util.h"
13#include "copy.h"
14#include "crypt-util.h"
15#include "def.h"
16#include "device-nodes.h"
17#include "dissect-image.h"
18#include "fd-util.h"
19#include "fileio.h"
20#include "fs-util.h"
21#include "gpt.h"
22#include "hexdecoct.h"
23#include "hostname-util.h"
24#include "id128-util.h"
25#include "linux-3.13/dm-ioctl.h"
26#include "missing.h"
27#include "mount-util.h"
28#include "os-util.h"
29#include "path-util.h"
30#include "process-util.h"
31#include "raw-clone.h"
32#include "signal-util.h"
33#include "stat-util.h"
34#include "stdio-util.h"
35#include "string-table.h"
36#include "string-util.h"
37#include "strv.h"
38#include "udev-util.h"
39#include "user-util.h"
40#include "xattr-util.h"
41
42int probe_filesystem(const char *node, char **ret_fstype) {
43 /* Try to find device content type and return it in *ret_fstype. If nothing is found,
44 * 0/NULL will be returned. -EUCLEAN will be returned for ambigous results, and an
45 * different error otherwise. */
46
47#if HAVE_BLKID1
48 _cleanup_(blkid_free_probep)__attribute__((cleanup(blkid_free_probep))) blkid_probe b = NULL((void*)0);
49 const char *fstype;
50 int r;
51
52 errno(*__errno_location ()) = 0;
53 b = blkid_new_probe_from_filename(node);
54 if (!b)
55 return -errno(*__errno_location ()) ?: -ENOMEM12;
56
57 blkid_probe_enable_superblocks(b, 1);
58 blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE(1 << 5));
59
60 errno(*__errno_location ()) = 0;
61 r = blkid_do_safeprobe(b);
62 if (r == 1) {
63 log_debug("No type detected on partition %s", node)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 63, __func__, "No type detected on partition %s"
, node) : -abs(_e); });
64 goto not_found;
65 }
66 if (r == -2) {
67 log_debug("Results ambiguous for partition %s", node)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 67, __func__, "Results ambiguous for partition %s"
, node) : -abs(_e); });
68 return -EUCLEAN117;
69 }
70 if (r != 0)
71 return -errno(*__errno_location ()) ?: -EIO5;
72
73 (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL((void*)0));
74
75 if (fstype) {
76 char *t;
77
78 t = strdup(fstype);
79 if (!t)
80 return -ENOMEM12;
81
82 *ret_fstype = t;
83 return 1;
84 }
85
86not_found:
87 *ret_fstype = NULL((void*)0);
88 return 0;
89#else
90 return -EOPNOTSUPP95;
91#endif
92}
93
94#if HAVE_BLKID1
95/* Detect RPMB and Boot partitions, which are not listed by blkid.
96 * See https://github.com/systemd/systemd/issues/5806. */
97static bool_Bool device_is_mmc_special_partition(struct udev_device *d) {
98 const char *sysname;
99
100 sysname = udev_device_get_sysname(d);
101 return sysname && startswith(sysname, "mmcblk") &&
102 (endswith(sysname, "rpmb") || endswith(sysname, "boot0") || endswith(sysname, "boot1"));
103}
104
105static bool_Bool device_is_block(struct udev_device *d) {
106 const char *ss;
107
108 ss = udev_device_get_subsystem(d);
109 if (!ss)
110 return false0;
111
112 return streq(ss, "block")(strcmp((ss),("block")) == 0);
113}
114#endif
115
116int dissect_image(
117 int fd,
118 const void *root_hash,
119 size_t root_hash_size,
120 DissectImageFlags flags,
121 DissectedImage **ret) {
122
123#if HAVE_BLKID1
124 sd_id128_t root_uuid = SD_ID128_NULL((const sd_id128_t) { .qwords = { 0, 0 }}), verity_uuid = SD_ID128_NULL((const sd_id128_t) { .qwords = { 0, 0 }});
125 _cleanup_(udev_enumerate_unrefp)__attribute__((cleanup(udev_enumerate_unrefp))) struct udev_enumerate *e = NULL((void*)0);
126 bool_Bool is_gpt, is_mbr, generic_rw, multiple_generic = false0;
127 _cleanup_(udev_device_unrefp)__attribute__((cleanup(udev_device_unrefp))) struct udev_device *d = NULL((void*)0);
128 _cleanup_(dissected_image_unrefp)__attribute__((cleanup(dissected_image_unrefp))) DissectedImage *m = NULL((void*)0);
129 _cleanup_(blkid_free_probep)__attribute__((cleanup(blkid_free_probep))) blkid_probe b = NULL((void*)0);
130 _cleanup_(udev_unrefp)__attribute__((cleanup(udev_unrefp))) struct udev *udev = NULL((void*)0);
131 _cleanup_free___attribute__((cleanup(freep))) char *generic_node = NULL((void*)0);
132 sd_id128_t generic_uuid = SD_ID128_NULL((const sd_id128_t) { .qwords = { 0, 0 }});
133 const char *pttype = NULL((void*)0);
134 struct udev_list_entry *first, *item;
135 blkid_partlist pl;
136 int r, generic_nr;
137 struct stat st;
138 unsigned i;
139
140 assert(fd >= 0)do { if ((__builtin_expect(!!(!(fd >= 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("fd >= 0"), "../src/shared/dissect-image.c"
, 140, __PRETTY_FUNCTION__); } while (0);
1
Assuming 'fd' is >= 0
→
2
←
Taking false branch
→
3
←
Loop condition is false. Exiting loop
→
141 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/shared/dissect-image.c",
141, __PRETTY_FUNCTION__); } while (0);
4
←
Assuming 'ret' is non-null
→
5
←
Taking false branch
→
6
←
Loop condition is false. Exiting loop
→
142 assert(root_hash || root_hash_size == 0)do { if ((__builtin_expect(!!(!(root_hash || root_hash_size ==
0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("root_hash || root_hash_size == 0"
), "../src/shared/dissect-image.c", 142, __PRETTY_FUNCTION__)
; } while (0);
7
←
Assuming 'root_hash' is null
→
8
←
Assuming 'root_hash_size' is equal to 0
→
9
←
Taking false branch
→
10
←
Loop condition is false. Exiting loop
→
143
144 /* Probes a disk image, and returns information about what it found in *ret.
145 *
146 * Returns -ENOPKG if no suitable partition table or file system could be found.
147 * Returns -EADDRNOTAVAIL if a root hash was specified but no matching root/verity partitions found. */
148
149 if (root_hash
10.1
'root_hash' is null
) {
11
←
Taking false branch
→
150 /* If a root hash is supplied, then we use the root partition that has a UUID that match the first
151 * 128bit of the root hash. And we use the verity partition that has a UUID that match the final
152 * 128bit. */
153
154 if (root_hash_size < sizeof(sd_id128_t))
155 return -EINVAL22;
156
157 memcpy(&root_uuid, root_hash, sizeof(sd_id128_t));
158 memcpy(&verity_uuid, (const uint8_t*) root_hash + root_hash_size - sizeof(sd_id128_t), sizeof(sd_id128_t));
159
160 if (sd_id128_is_null(root_uuid))
161 return -EINVAL22;
162 if (sd_id128_is_null(verity_uuid))
163 return -EINVAL22;
164 }
165
166 if (fstat(fd, &st) < 0)
12
←
Assuming the condition is false
→
13
←
Taking false branch
→
167 return -errno(*__errno_location ());
168
169 if (!S_ISBLK(st.st_mode)((((st.st_mode)) & 0170000) == (0060000)))
14
←
Assuming the condition is true
→
15
←
Taking false branch
→
170 return -ENOTBLK15;
171
172 b = blkid_new_probe();
173 if (!b)
16
←
Assuming 'b' is non-null
→
17
←
Taking false branch
→
174 return -ENOMEM12;
175
176 errno(*__errno_location ()) = 0;
177 r = blkid_probe_set_device(b, fd, 0, 0);
178 if (r != 0)
18
←
Assuming 'r' is equal to 0
→
19
←
Taking false branch
→
179 return -errno(*__errno_location ()) ?: -ENOMEM12;
180
181 if ((flags & DISSECT_IMAGE_GPT_ONLY) == 0) {
20
←
Assuming the condition is false
→
21
←
Taking false branch
→
182 /* Look for file system superblocks, unless we only shall look for GPT partition tables */
183 blkid_probe_enable_superblocks(b, 1);
184 blkid_probe_set_superblocks_flags(b, BLKID_SUBLKS_TYPE(1 << 5)|BLKID_SUBLKS_USAGE(1 << 7));
185 }
186
187 blkid_probe_enable_partitions(b, 1);
188 blkid_probe_set_partitions_flags(b, BLKID_PARTS_ENTRY_DETAILS(1 << 2));
189
190 errno(*__errno_location ()) = 0;
191 r = blkid_do_safeprobe(b);
192 if (IN_SET(r, -2, 1)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended
[20 - sizeof((int[]){-2, 1})/sizeof(int)]; switch(r) { case -
2: case 1: _found = 1; break; default: break; } _found; })) {
22
←
Control jumps to the 'default' case at line 192
→
23
←
 Execution continues on line 192
→
24
←
Taking false branch
→
193 log_debug("Failed to identify any partition table.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 193, __func__, "Failed to identify any partition table."
) : -abs(_e); });
194 return -ENOPKG65;
195 }
196 if (r != 0)
25
←
Assuming 'r' is equal to 0
→
26
←
Taking false branch
→
197 return -errno(*__errno_location ()) ?: -EIO5;
198
199 m = new0(DissectedImage, 1)((DissectedImage*) calloc((1), sizeof(DissectedImage)));
200 if (!m)
27
←
Assuming 'm' is non-null
→
28
←
Taking false branch
→
201 return -ENOMEM12;
202
203 if (!(flags & DISSECT_IMAGE_GPT_ONLY) &&
204 (flags & DISSECT_IMAGE_REQUIRE_ROOT)) {
205 const char *usage = NULL((void*)0);
206
207 (void) blkid_probe_lookup_value(b, "USAGE", &usage, NULL((void*)0));
208 if (STRPTR_IN_SET(usage, "filesystem", "crypto")({ const char* _x = (usage); _x && (!!strv_find((((char
**) ((const char*[]) { "filesystem", "crypto", ((void*)0) }))
), (_x))); })) {
209 _cleanup_free___attribute__((cleanup(freep))) char *t = NULL((void*)0), *n = NULL((void*)0);
210 const char *fstype = NULL((void*)0);
211
212 /* OK, we have found a file system, that's our root partition then. */
213 (void) blkid_probe_lookup_value(b, "TYPE", &fstype, NULL((void*)0));
214
215 if (fstype) {
216 t = strdup(fstype);
217 if (!t)
218 return -ENOMEM12;
219 }
220
221 if (asprintf(&n, "/dev/block/%u:%u", major(st.st_rdev)gnu_dev_major (st.st_rdev), minor(st.st_rdev)gnu_dev_minor (st.st_rdev)) < 0)
222 return -ENOMEM12;
223
224 m->partitions[PARTITION_ROOT] = (DissectedPartition) {
225 .found = true1,
226 .rw = true1,
227 .partno = -1,
228 .architecture = _ARCHITECTURE_INVALID,
229 .fstype = TAKE_PTR(t)({ typeof(t) _ptr_ = (t); (t) = ((void*)0); _ptr_; }),
230 .node = TAKE_PTR(n)({ typeof(n) _ptr_ = (n); (n) = ((void*)0); _ptr_; }),
231 };
232
233 m->encrypted = streq_ptr(fstype, "crypto_LUKS");
234
235 *ret = TAKE_PTR(m)({ typeof(m) _ptr_ = (m); (m) = ((void*)0); _ptr_; });
236
237 return 0;
238 }
239 }
240
241 (void) blkid_probe_lookup_value(b, "PTTYPE", &pttype, NULL((void*)0));
242 if (!pttype)
29
←
Assuming 'pttype' is non-null
→
30
←
Taking false branch
→
243 return -ENOPKG65;
244
245 is_gpt = streq_ptr(pttype, "gpt");
246 is_mbr = streq_ptr(pttype, "dos");
247
248 if (!is_gpt
30.1
'is_gpt' is true
 && ((flags & DISSECT_IMAGE_GPT_ONLY) || !is_mbr))
249 return -ENOPKG65;
250
251 errno(*__errno_location ()) = 0;
252 pl = blkid_probe_get_partitions(b);
253 if (!pl)
31
←
Assuming 'pl' is non-null
→
32
←
Taking false branch
→
254 return -errno(*__errno_location ()) ?: -ENOMEM12;
255
256 udev = udev_new();
257 if (!udev)
33
←
Assuming 'udev' is non-null
→
34
←
Taking false branch
→
258 return -errno(*__errno_location ());
259
260 d = udev_device_new_from_devnum(udev, 'b', st.st_rdev);
261 if (!d)
35
←
Assuming 'd' is non-null
→
36
←
Taking false branch
→
262 return -ENOMEM12;
263
264 for (i = 0;; i++) {
37
←
Loop condition is true. Entering loop body
→
265 int n, z;
266
267 if (i
37.1
'i' is < 10
 >= 10) {
38
←
Taking false branch
→
268 log_debug("Kernel partitions never appeared.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 268, __func__, "Kernel partitions never appeared."
) : -abs(_e); });
269 return -ENXIO6;
270 }
271
272 e = udev_enumerate_new(udev);
273 if (!e)
39
←
Assuming 'e' is non-null
→
40
←
Taking false branch
→
274 return -errno(*__errno_location ());
275
276 r = udev_enumerate_add_match_parent(e, d);
277 if (r < 0)
41
←
Assuming 'r' is >= 0
→
42
←
Taking false branch
→
278 return r;
279
280 r = udev_enumerate_scan_devices(e);
281 if (r < 0)
43
←
Assuming 'r' is >= 0
→
44
←
Taking false branch
→
282 return r;
283
284 /* Count the partitions enumerated by the kernel */
285 n = 0;
286 first = udev_enumerate_get_list_entry(e);
287 udev_list_entry_foreach(item, first)for (item = first; item != ((void*)0); item = udev_list_entry_get_next
(item)) {
45
←
Assuming 'item' is equal to null
→
46
←
Loop condition is false. Execution continues on line 308
→
288 _cleanup_(udev_device_unrefp)__attribute__((cleanup(udev_device_unrefp))) struct udev_device *q;
289 dev_t qn;
290
291 q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
292 if (!q)
293 return -errno(*__errno_location ());
294
295 qn = udev_device_get_devnum(q);
296 if (major(qn)gnu_dev_major (qn) == 0)
297 continue;
298
299 if (!device_is_block(q))
300 continue;
301
302 if (device_is_mmc_special_partition(q))
303 continue;
304 n++;
305 }
306
307 /* Count the partitions enumerated by blkid */
308 z = blkid_partlist_numof_partitions(pl);
309 if (n == z + 1)
47
←
Assuming the condition is true
→
48
←
Taking true branch
→
310 break;
49
←
 Execution continues on line 359
→
311 if (n > z + 1) {
312 log_debug("blkid and kernel partition list do not match.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 312, __func__, "blkid and kernel partition list do not match."
) : -abs(_e); });
313 return -EIO5;
314 }
315 if (n < z + 1) {
316 unsigned j = 0;
317
318 /* The kernel has probed fewer partitions than blkid? Maybe the kernel prober is still running
319 * or it got EBUSY because udev already opened the device. Let's reprobe the device, which is a
320 * synchronous call that waits until probing is complete. */
321
322 for (;;) {
323 if (j++ > 20)
324 return -EBUSY16;
325
326 if (ioctl(fd, BLKRRPART(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8))
| (((95)) << 0) | ((0) << ((0 +8)+8))), 0) < 0) {
327 r = -errno(*__errno_location ());
328
329 if (r == -EINVAL22) {
330 struct loop_info64 info;
331
332 /* If we are running on a loop device that has partition scanning off,
333 * return an explicit recognizable error about this, so that callers
334 * can generate a proper message explaining the situation. */
335
336 if (ioctl(fd, LOOP_GET_STATUS640x4C05, &info) >= 0 && (info.lo_flags & LO_FLAGS_PARTSCAN) == 0) {
337 log_debug("Device is loop device and partition scanning is off!")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 337, __func__, "Device is loop device and partition scanning is off!"
) : -abs(_e); });
338 return -EPROTONOSUPPORT93;
339 }
340 }
341 if (r != -EBUSY16)
342 return r;
343 } else
344 break;
345
346 /* If something else has the device open, such as an udev rule, the ioctl will return
347 * EBUSY. Since there's no way to wait until it isn't busy anymore, let's just wait a
348 * bit, and try again.
349 *
350 * This is really something they should fix in the kernel! */
351
352 (void) usleep(50 * USEC_PER_MSEC((usec_t) 1000ULL));
353 }
354 }
355
356 e = udev_enumerate_unref(e);
357 }
358
359 first = udev_enumerate_get_list_entry(e);
360 udev_list_entry_foreach(item, first)for (item = first; item != ((void*)0); item = udev_list_entry_get_next
(item)) {
50
←
Assuming 'item' is not equal to null
→
51
←
Loop condition is true. Entering loop body
→
92
←
Assuming 'item' is not equal to null
→
93
←
Loop condition is true. Entering loop body
→
361 _cleanup_(udev_device_unrefp)__attribute__((cleanup(udev_device_unrefp))) struct udev_device *q;
362 unsigned long long pflags;
363 blkid_partition pp;
364 const char *node;
365 dev_t qn;
366 int nr;
367
368 q = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
369 if (!q)
52
←
Assuming 'q' is non-null
→
53
←
Taking false branch
→
94
←
Assuming 'q' is null
→
95
←
Taking true branch
→
370 return -errno(*__errno_location ());
96
←
Potential leak of memory pointed to by 'generic_node'
371
372 qn = udev_device_get_devnum(q);
373 if (major(qn)gnu_dev_major (qn) == 0)
54
←
Assuming the condition is false
→
55
←
Taking false branch
→
374 continue;
375
376 if (st.st_rdev == qn)
56
←
Assuming 'qn' is not equal to field 'st_rdev'
→
57
←
Taking false branch
→
377 continue;
378
379 if (!device_is_block(q))
58
←
Taking false branch
→
380 continue;
381
382 if (device_is_mmc_special_partition(q))
59
←
Taking false branch
→
383 continue;
384
385 node = udev_device_get_devnode(q);
386 if (!node)
60
←
Assuming 'node' is non-null
→
61
←
Taking false branch
→
387 continue;
388
389 pp = blkid_partlist_devno_to_partition(pl, qn);
390 if (!pp)
62
←
Assuming 'pp' is non-null
→
63
←
Taking false branch
→
391 continue;
392
393 pflags = blkid_partition_get_flags(pp);
394
395 nr = blkid_partition_get_partno(pp);
396 if (nr < 0)
64
←
Assuming 'nr' is >= 0
→
65
←
Taking false branch
→
397 continue;
398
399 if (is_gpt
65.1
'is_gpt' is true
) {
66
←
Taking true branch
→
400 int designator = _PARTITION_DESIGNATOR_INVALID, architecture = _ARCHITECTURE_INVALID;
401 const char *stype, *sid, *fstype = NULL((void*)0);
402 sd_id128_t type_id, id;
403 bool_Bool rw = true1;
404
405 sid = blkid_partition_get_uuid(pp);
406 if (!sid)
67
←
Assuming 'sid' is non-null
→
68
←
Taking false branch
→
407 continue;
408 if (sd_id128_from_string(sid, &id) < 0)
69
←
Assuming the condition is false
→
70
←
Taking false branch
→
409 continue;
410
411 stype = blkid_partition_get_type_string(pp);
412 if (!stype)
71
←
Assuming 'stype' is non-null
→
72
←
Taking false branch
→
413 continue;
414 if (sd_id128_from_string(stype, &type_id) < 0)
73
←
Assuming the condition is false
→
74
←
Taking false branch
→
415 continue;
416
417 if (sd_id128_equal(type_id, GPT_HOME((const sd_id128_t) { .bytes = { 0x93, 0x3a, 0xc7, 0xe1, 0x2e
, 0xb4, 0x4f, 0x13, 0xb8, 0x44, 0x0e, 0x14, 0xe2, 0xae, 0xf9,
0x15 }}))) {
75
←
Taking false branch
→
418
419 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
420 continue;
421
422 designator = PARTITION_HOME;
423 rw = !(pflags & GPT_FLAG_READ_ONLY(1ULL << 60));
424 } else if (sd_id128_equal(type_id, GPT_SRV((const sd_id128_t) { .bytes = { 0x3b, 0x8f, 0x84, 0x25, 0x20
, 0xe0, 0x4f, 0x3b, 0x90, 0x7f, 0x1a, 0x25, 0xa7, 0x6f, 0x98,
0xe8 }}))) {
76
←
Taking false branch
→
425
426 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
427 continue;
428
429 designator = PARTITION_SRV;
430 rw = !(pflags & GPT_FLAG_READ_ONLY(1ULL << 60));
431 } else if (sd_id128_equal(type_id, GPT_ESP((const sd_id128_t) { .bytes = { 0xc1, 0x2a, 0x73, 0x28, 0xf8
, 0x1f, 0x11, 0xd2, 0xba, 0x4b, 0x00, 0xa0, 0xc9, 0x3e, 0xc9,
0x3b }}))) {
77
←
Taking false branch
→
432
433 /* Note that we don't check the GPT_FLAG_NO_AUTO flag for the ESP, as it is not defined
434 * there. We instead check the GPT_FLAG_NO_BLOCK_IO_PROTOCOL, as recommended by the
435 * UEFI spec (See "12.3.3 Number and Location of System Partitions"). */
436
437 if (pflags & GPT_FLAG_NO_BLOCK_IO_PROTOCOL(1ULL << 1))
438 continue;
439
440 designator = PARTITION_ESP;
441 fstype = "vfat";
442 }
443#ifdef GPT_ROOT_NATIVE((const sd_id128_t) { .bytes = { 0x4f, 0x68, 0xbc, 0xe3, 0xe8
, 0xcd, 0x4d, 0xb1, 0x96, 0xe7, 0xfb, 0xca, 0xf9, 0x84, 0xb7,
0x09 }})
444 else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE((const sd_id128_t) { .bytes = { 0x4f, 0x68, 0xbc, 0xe3, 0xe8
, 0xcd, 0x4d, 0xb1, 0x96, 0xe7, 0xfb, 0xca, 0xf9, 0x84, 0xb7,
0x09 }}))) {
78
←
Taking false branch
→
445
446 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
447 continue;
448
449 /* If a root ID is specified, ignore everything but the root id */
450 if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id))
451 continue;
452
453 designator = PARTITION_ROOT;
454 architecture = native_architecture()ARCHITECTURE_X86_64;
455 rw = !(pflags & GPT_FLAG_READ_ONLY(1ULL << 60));
456 } else if (sd_id128_equal(type_id, GPT_ROOT_NATIVE_VERITY((const sd_id128_t) { .bytes = { 0x2c, 0x73, 0x57, 0xed, 0xeb
, 0xd2, 0x46, 0xd9, 0xae, 0xc1, 0x23, 0xd4, 0x37, 0xec, 0x2b,
0xf5 }}))) {
79
←
Taking false branch
→
457
458 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
459 continue;
460
461 m->can_verity = true1;
462
463 /* Ignore verity unless a root hash is specified */
464 if (sd_id128_is_null(verity_uuid) || !sd_id128_equal(verity_uuid, id))
465 continue;
466
467 designator = PARTITION_ROOT_VERITY;
468 fstype = "DM_verity_hash";
469 architecture = native_architecture()ARCHITECTURE_X86_64;
470 rw = false0;
471 }
472#endif
473#ifdef GPT_ROOT_SECONDARY((const sd_id128_t) { .bytes = { 0x44, 0x47, 0x95, 0x40, 0xf2
, 0x97, 0x41, 0xb2, 0x9a, 0xf7, 0xd1, 0x31, 0xd5, 0xf0, 0x45,
0x8a }})
474 else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY((const sd_id128_t) { .bytes = { 0x44, 0x47, 0x95, 0x40, 0xf2
, 0x97, 0x41, 0xb2, 0x9a, 0xf7, 0xd1, 0x31, 0xd5, 0xf0, 0x45,
0x8a }}))) {
80
←
Taking false branch
→
475
476 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
477 continue;
478
479 /* If a root ID is specified, ignore everything but the root id */
480 if (!sd_id128_is_null(root_uuid) && !sd_id128_equal(root_uuid, id))
481 continue;
482
483 designator = PARTITION_ROOT_SECONDARY;
484 architecture = SECONDARY_ARCHITECTUREARCHITECTURE_X86;
485 rw = !(pflags & GPT_FLAG_READ_ONLY(1ULL << 60));
486 } else if (sd_id128_equal(type_id, GPT_ROOT_SECONDARY_VERITY((const sd_id128_t) { .bytes = { 0xd1, 0x3c, 0x5d, 0x3b, 0xb5
, 0xd1, 0x42, 0x2a, 0xb2, 0x9f, 0x94, 0x54, 0xfd, 0xc8, 0x9d,
0x76 }}))) {
81
←
Taking false branch
→
487
488 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
489 continue;
490
491 m->can_verity = true1;
492
493 /* Ignore verity unless root has is specified */
494 if (sd_id128_is_null(verity_uuid) || !sd_id128_equal(verity_uuid, id))
495 continue;
496
497 designator = PARTITION_ROOT_SECONDARY_VERITY;
498 fstype = "DM_verity_hash";
499 architecture = SECONDARY_ARCHITECTUREARCHITECTURE_X86;
500 rw = false0;
501 }
502#endif
503 else if (sd_id128_equal(type_id, GPT_SWAP((const sd_id128_t) { .bytes = { 0x06, 0x57, 0xfd, 0x6d, 0xa4
, 0xab, 0x43, 0xc4, 0x84, 0xe5, 0x09, 0x33, 0xc8, 0x4b, 0x4f,
0x4f }}))) {
82
←
Taking false branch
→
504
505 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
506 continue;
507
508 designator = PARTITION_SWAP;
509 fstype = "swap";
510 } else if (sd_id128_equal(type_id, GPT_LINUX_GENERIC((const sd_id128_t) { .bytes = { 0x0f, 0xc6, 0x3d, 0xaf, 0x84
, 0x83, 0x47, 0x72, 0x8e, 0x79, 0x3d, 0x69, 0xd8, 0x47, 0x7d,
0xe4 }}))) {
83
←
Taking true branch
→
511
512 if (pflags & GPT_FLAG_NO_AUTO(1ULL << 63))
84
←
Assuming the condition is false
→
85
←
Taking false branch
→
513 continue;
514
515 if (generic_node
85.1
'generic_node' is null
)
86
←
Taking false branch
→
516 multiple_generic = true1;
517 else {
518 generic_nr = nr;
519 generic_rw = !(pflags & GPT_FLAG_READ_ONLY(1ULL << 60));
87
←
Assuming the condition is false
→
520 generic_uuid = id;
521 generic_node = strdup(node);
88
←
Memory is allocated
→
522 if (!generic_node)
89
←
Assuming 'generic_node' is non-null
→
90
←
Taking false branch
→
523 return -ENOMEM12;
524 }
525 }
526
527 if (designator
90.1
'designator' is equal to _PARTITION_DESIGNATOR_INVALID
 != _PARTITION_DESIGNATOR_INVALID) {
91
←
Taking false branch
→
528 _cleanup_free___attribute__((cleanup(freep))) char *t = NULL((void*)0), *n = NULL((void*)0);
529
530 /* First one wins */
531 if (m->partitions[designator].found)
532 continue;
533
534 if (fstype) {
535 t = strdup(fstype);
536 if (!t)
537 return -ENOMEM12;
538 }
539
540 n = strdup(node);
541 if (!n)
542 return -ENOMEM12;
543
544 m->partitions[designator] = (DissectedPartition) {
545 .found = true1,
546 .partno = nr,
547 .rw = rw,
548 .architecture = architecture,
549 .node = TAKE_PTR(n)({ typeof(n) _ptr_ = (n); (n) = ((void*)0); _ptr_; }),
550 .fstype = TAKE_PTR(t)({ typeof(t) _ptr_ = (t); (t) = ((void*)0); _ptr_; }),
551 .uuid = id,
552 };
553 }
554
555 } else if (is_mbr) {
556
557 if (pflags != 0x80) /* Bootable flag */
558 continue;
559
560 if (blkid_partition_get_type(pp) != 0x83) /* Linux partition */
561 continue;
562
563 if (generic_node)
564 multiple_generic = true1;
565 else {
566 generic_nr = nr;
567 generic_rw = true1;
568 generic_node = strdup(node);
569 if (!generic_node)
570 return -ENOMEM12;
571 }
572 }
573 }
574
575 if (!m->partitions[PARTITION_ROOT].found) {
576 /* No root partition found? Then let's see if ther's one for the secondary architecture. And if not
577 * either, then check if there's a single generic one, and use that. */
578
579 if (m->partitions[PARTITION_ROOT_VERITY].found)
580 return -EADDRNOTAVAIL99;
581
582 if (m->partitions[PARTITION_ROOT_SECONDARY].found) {
583 m->partitions[PARTITION_ROOT] = m->partitions[PARTITION_ROOT_SECONDARY];
584 zero(m->partitions[PARTITION_ROOT_SECONDARY])(({ size_t _l_ = (sizeof(m->partitions[PARTITION_ROOT_SECONDARY
])); void *_x_ = (&(m->partitions[PARTITION_ROOT_SECONDARY
])); _l_ == 0 ? _x_ : memset(_x_, 0, _l_); }));
585
586 m->partitions[PARTITION_ROOT_VERITY] = m->partitions[PARTITION_ROOT_SECONDARY_VERITY];
587 zero(m->partitions[PARTITION_ROOT_SECONDARY_VERITY])(({ size_t _l_ = (sizeof(m->partitions[PARTITION_ROOT_SECONDARY_VERITY
])); void *_x_ = (&(m->partitions[PARTITION_ROOT_SECONDARY_VERITY
])); _l_ == 0 ? _x_ : memset(_x_, 0, _l_); }));
588
589 } else if (flags & DISSECT_IMAGE_REQUIRE_ROOT) {
590
591 /* If the root has was set, then we won't fallback to a generic node, because the root hash
592 * decides */
593 if (root_hash)
594 return -EADDRNOTAVAIL99;
595
596 /* If we didn't find a generic node, then we can't fix this up either */
597 if (!generic_node)
598 return -ENXIO6;
599
600 /* If we didn't find a properly marked root partition, but we did find a single suitable
601 * generic Linux partition, then use this as root partition, if the caller asked for it. */
602 if (multiple_generic)
603 return -ENOTUNIQ76;
604
605 m->partitions[PARTITION_ROOT] = (DissectedPartition) {
606 .found = true1,
607 .rw = generic_rw,
608 .partno = generic_nr,
609 .architecture = _ARCHITECTURE_INVALID,
610 .node = TAKE_PTR(generic_node)({ typeof(generic_node) _ptr_ = (generic_node); (generic_node
) = ((void*)0); _ptr_; }),
611 .uuid = generic_uuid,
612 };
613 }
614 }
615
616 if (root_hash) {
617 if (!m->partitions[PARTITION_ROOT_VERITY].found || !m->partitions[PARTITION_ROOT].found)
618 return -EADDRNOTAVAIL99;
619
620 /* If we found the primary root with the hash, then we definitely want to suppress any secondary root
621 * (which would be weird, after all the root hash should only be assigned to one pair of
622 * partitions... */
623 m->partitions[PARTITION_ROOT_SECONDARY].found = false0;
624 m->partitions[PARTITION_ROOT_SECONDARY_VERITY].found = false0;
625
626 /* If we found a verity setup, then the root partition is necessarily read-only. */
627 m->partitions[PARTITION_ROOT].rw = false0;
628
629 m->verity = true1;
630 }
631
632 blkid_free_probe(b);
633 b = NULL((void*)0);
634
635 /* Fill in file system types if we don't know them yet. */
636 for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) {
637 DissectedPartition *p = m->partitions + i;
638
639 if (!p->found)
640 continue;
641
642 if (!p->fstype && p->node) {
643 r = probe_filesystem(p->node, &p->fstype);
644 if (r < 0 && r != -EUCLEAN117)
645 return r;
646 }
647
648 if (streq_ptr(p->fstype, "crypto_LUKS"))
649 m->encrypted = true1;
650
651 if (p->fstype && fstype_is_ro(p->fstype))
652 p->rw = false0;
653 }
654
655 *ret = TAKE_PTR(m)({ typeof(m) _ptr_ = (m); (m) = ((void*)0); _ptr_; });
656
657 return 0;
658#else
659 return -EOPNOTSUPP95;
660#endif
661}
662
663DissectedImage* dissected_image_unref(DissectedImage *m) {
664 unsigned i;
665
666 if (!m)
667 return NULL((void*)0);
668
669 for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) {
670 free(m->partitions[i].fstype);
671 free(m->partitions[i].node);
672 free(m->partitions[i].decrypted_fstype);
673 free(m->partitions[i].decrypted_node);
674 }
675
676 free(m->hostname);
677 strv_free(m->machine_info);
678 strv_free(m->os_release);
679
680 return mfree(m);
681}
682
683static int is_loop_device(const char *path) {
684 char s[SYS_BLOCK_PATH_MAX("/../loop/")((sizeof("""/sys/dev/block/""") - 1) + (2+(sizeof(dev_t) <=
1 ? 3 : sizeof(dev_t) <= 2 ? 5 : sizeof(dev_t) <= 4 ? 10
: sizeof(dev_t) <= 8 ? 20 : sizeof(int[-2*(sizeof(dev_t) >
8)]))) + 1 + (2+(sizeof(dev_t) <= 1 ? 3 : sizeof(dev_t) <=
2 ? 5 : sizeof(dev_t) <= 4 ? 10 : sizeof(dev_t) <= 8 ?
20 : sizeof(int[-2*(sizeof(dev_t) > 8)]))) + strlen_ptr("/../loop/"
))];
685 struct stat st;
686
687 assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("path"), "../src/shared/dissect-image.c"
, 687, __PRETTY_FUNCTION__); } while (0);
688
689 if (stat(path, &st) < 0)
690 return -errno(*__errno_location ());
691
692 if (!S_ISBLK(st.st_mode)((((st.st_mode)) & 0170000) == (0060000)))
693 return -ENOTBLK15;
694
695 xsprintf_sys_block_path(s, "/loop/", st.st_dev)do { if ((__builtin_expect(!!(!(((size_t) snprintf(s, __extension__
(__builtin_choose_expr( !__builtin_types_compatible_p(typeof
(s), typeof(&*(s))), sizeof(s)/sizeof((s)[0]), ((void)0))
), "/sys/dev/block/%u:%u%s", gnu_dev_major (st.st_dev), gnu_dev_minor
(st.st_dev), strempty("/loop/")) < (__extension__ (__builtin_choose_expr
( !__builtin_types_compatible_p(typeof(s), typeof(&*(s)))
, sizeof(s)/sizeof((s)[0]), ((void)0))))))),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("xsprintf: " "s" "[] must be big enough"
), "../src/shared/dissect-image.c", 695, __PRETTY_FUNCTION__)
; } while (0);
696 if (access(s, F_OK0) < 0) {
697 if (errno(*__errno_location ()) != ENOENT2)
698 return -errno(*__errno_location ());
699
700 /* The device itself isn't a loop device, but maybe it's a partition and its parent is? */
701 xsprintf_sys_block_path(s, "/../loop/", st.st_dev)do { if ((__builtin_expect(!!(!(((size_t) snprintf(s, __extension__
(__builtin_choose_expr( !__builtin_types_compatible_p(typeof
(s), typeof(&*(s))), sizeof(s)/sizeof((s)[0]), ((void)0))
), "/sys/dev/block/%u:%u%s", gnu_dev_major (st.st_dev), gnu_dev_minor
(st.st_dev), strempty("/../loop/")) < (__extension__ (__builtin_choose_expr
( !__builtin_types_compatible_p(typeof(s), typeof(&*(s)))
, sizeof(s)/sizeof((s)[0]), ((void)0))))))),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("xsprintf: " "s" "[] must be big enough"
), "../src/shared/dissect-image.c", 701, __PRETTY_FUNCTION__)
; } while (0);
702 if (access(s, F_OK0) < 0)
703 return errno(*__errno_location ()) == ENOENT2 ? false0 : -errno(*__errno_location ());
704 }
705
706 return true1;
707}
708
709static int mount_partition(
710 DissectedPartition *m,
711 const char *where,
712 const char *directory,
713 uid_t uid_shift,
714 DissectImageFlags flags) {
715
716 _cleanup_free___attribute__((cleanup(freep))) char *chased = NULL((void*)0), *options = NULL((void*)0);
717 const char *p, *node, *fstype;
718 bool_Bool rw;
719 int r;
720
721 assert(m)do { if ((__builtin_expect(!!(!(m)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("m"), "../src/shared/dissect-image.c", 721
, __PRETTY_FUNCTION__); } while (0);
722 assert(where)do { if ((__builtin_expect(!!(!(where)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("where"), "../src/shared/dissect-image.c"
, 722, __PRETTY_FUNCTION__); } while (0);
723
724 node = m->decrypted_node ?: m->node;
725 fstype = m->decrypted_fstype ?: m->fstype;
726
727 if (!m->found || !node || !fstype)
728 return 0;
729
730 /* Stacked encryption? Yuck */
731 if (streq_ptr(fstype, "crypto_LUKS"))
732 return -ELOOP40;
733
734 rw = m->rw && !(flags & DISSECT_IMAGE_READ_ONLY);
735
736 if (directory) {
737 r = chase_symlinks(directory, where, CHASE_PREFIX_ROOT, &chased);
738 if (r < 0)
739 return r;
740
741 p = chased;
742 } else
743 p = where;
744
745 /* If requested, turn on discard support. */
746 if (fstype_can_discard(fstype) &&
747 ((flags & DISSECT_IMAGE_DISCARD) ||
748 ((flags & DISSECT_IMAGE_DISCARD_ON_LOOP) && is_loop_device(m->node)))) {
749 options = strdup("discard");
750 if (!options)
751 return -ENOMEM12;
752 }
753
754 if (uid_is_valid(uid_shift) && uid_shift != 0 && fstype_can_uid_gid(fstype)) {
755 _cleanup_free___attribute__((cleanup(freep))) char *uid_option = NULL((void*)0);
756
757 if (asprintf(&uid_option, "uid=" UID_FMT"%" "u" ",gid=" GID_FMT"%" "u", uid_shift, (gid_t) uid_shift) < 0)
758 return -ENOMEM12;
759
760 if (!strextend_with_separator(&options, ",", uid_option, NULL((void*)0)))
761 return -ENOMEM12;
762 }
763
764 return mount_verbose(LOG_DEBUG7, node, p, fstype, MS_NODEVMS_NODEV|(rw ? 0 : MS_RDONLYMS_RDONLY), options);
765}
766
767int dissected_image_mount(DissectedImage *m, const char *where, uid_t uid_shift, DissectImageFlags flags) {
768 int r;
769
770 assert(m)do { if ((__builtin_expect(!!(!(m)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("m"), "../src/shared/dissect-image.c", 770
, __PRETTY_FUNCTION__); } while (0);
771 assert(where)do { if ((__builtin_expect(!!(!(where)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("where"), "../src/shared/dissect-image.c"
, 771, __PRETTY_FUNCTION__); } while (0);
772
773 if (!m->partitions[PARTITION_ROOT].found)
774 return -ENXIO6;
775
776 if ((flags & DISSECT_IMAGE_MOUNT_NON_ROOT_ONLY) == 0) {
777 r = mount_partition(m->partitions + PARTITION_ROOT, where, NULL((void*)0), uid_shift, flags);
778 if (r < 0)
779 return r;
780
781 if (flags & DISSECT_IMAGE_VALIDATE_OS) {
782 r = path_is_os_tree(where);
783 if (r < 0)
784 return r;
785 if (r == 0)
786 return -EMEDIUMTYPE124;
787 }
788 }
789
790 if ((flags & DISSECT_IMAGE_MOUNT_ROOT_ONLY))
791 return 0;
792
793 r = mount_partition(m->partitions + PARTITION_HOME, where, "/home", uid_shift, flags);
794 if (r < 0)
795 return r;
796
797 r = mount_partition(m->partitions + PARTITION_SRV, where, "/srv", uid_shift, flags);
798 if (r < 0)
799 return r;
800
801 if (m->partitions[PARTITION_ESP].found) {
802 const char *mp;
803
804 /* Mount the ESP to /efi if it exists and is empty. If it doesn't exist, use /boot instead. */
805
806 FOREACH_STRING(mp, "/efi", "/boot")for (char **_l = ({ char **_ll = ((char**) ((const char*[]) {
"/efi", "/boot", ((void*)0) })); mp = _ll ? _ll[0] : ((void*
)0); _ll; }); _l && *_l; mp = ({ _l ++; _l[0]; })) {
807 _cleanup_free___attribute__((cleanup(freep))) char *p = NULL((void*)0);
808
809 r = chase_symlinks(mp, where, CHASE_PREFIX_ROOT, &p);
810 if (r < 0)
811 continue;
812
813 r = dir_is_empty(p);
814 if (r > 0) {
815 r = mount_partition(m->partitions + PARTITION_ESP, where, mp, uid_shift, flags);
816 if (r < 0)
817 return r;
818 }
819 }
820 }
821
822 return 0;
823}
824
825#if HAVE_LIBCRYPTSETUP1
826typedef struct DecryptedPartition {
827 struct crypt_device *device;
828 char *name;
829 bool_Bool relinquished;
830} DecryptedPartition;
831
832struct DecryptedImage {
833 DecryptedPartition *decrypted;
834 size_t n_decrypted;
835 size_t n_allocated;
836};
837#endif
838
839DecryptedImage* decrypted_image_unref(DecryptedImage* d) {
840#if HAVE_LIBCRYPTSETUP1
841 size_t i;
842 int r;
843
844 if (!d)
845 return NULL((void*)0);
846
847 for (i = 0; i < d->n_decrypted; i++) {
848 DecryptedPartition *p = d->decrypted + i;
849
850 if (p->device && p->name && !p->relinquished) {
851 r = crypt_deactivate(p->device, p->name);
852 if (r < 0)
853 log_debug_errno(r, "Failed to deactivate encrypted partition %s", p->name)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 853, __func__, "Failed to deactivate encrypted partition %s"
, p->name) : -abs(_e); });
854 }
855
856 if (p->device)
857 crypt_free(p->device);
858 free(p->name);
859 }
860
861 free(d);
862#endif
863 return NULL((void*)0);
864}
865
866#if HAVE_LIBCRYPTSETUP1
867
868static int make_dm_name_and_node(const void *original_node, const char *suffix, char **ret_name, char **ret_node) {
869 _cleanup_free___attribute__((cleanup(freep))) char *name = NULL((void*)0), *node = NULL((void*)0);
870 const char *base;
871
872 assert(original_node)do { if ((__builtin_expect(!!(!(original_node)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("original_node"), "../src/shared/dissect-image.c"
, 872, __PRETTY_FUNCTION__); } while (0);
873 assert(suffix)do { if ((__builtin_expect(!!(!(suffix)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("suffix"), "../src/shared/dissect-image.c"
, 873, __PRETTY_FUNCTION__); } while (0);
874 assert(ret_name)do { if ((__builtin_expect(!!(!(ret_name)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret_name"), "../src/shared/dissect-image.c"
, 874, __PRETTY_FUNCTION__); } while (0);
875 assert(ret_node)do { if ((__builtin_expect(!!(!(ret_node)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret_node"), "../src/shared/dissect-image.c"
, 875, __PRETTY_FUNCTION__); } while (0);
876
877 base = strrchr(original_node, '/');
878 if (!base)
879 return -EINVAL22;
880 base++;
881 if (isempty(base))
882 return -EINVAL22;
883
884 name = strjoin(base, suffix)strjoin_real((base), suffix, ((void*)0));
885 if (!name)
886 return -ENOMEM12;
887 if (!filename_is_valid(name))
888 return -EINVAL22;
889
890 node = strjoin(crypt_get_dir(), "/", name)strjoin_real((crypt_get_dir()), "/", name, ((void*)0));
891 if (!node)
892 return -ENOMEM12;
893
894 *ret_name = TAKE_PTR(name)({ typeof(name) _ptr_ = (name); (name) = ((void*)0); _ptr_; }
);
895 *ret_node = TAKE_PTR(node)({ typeof(node) _ptr_ = (node); (node) = ((void*)0); _ptr_; }
);
896
897 return 0;
898}
899
900static int decrypt_partition(
901 DissectedPartition *m,
902 const char *passphrase,
903 DissectImageFlags flags,
904 DecryptedImage *d) {
905
906 _cleanup_free___attribute__((cleanup(freep))) char *node = NULL((void*)0), *name = NULL((void*)0);
907 _cleanup_(crypt_freep)__attribute__((cleanup(crypt_freep))) struct crypt_device *cd = NULL((void*)0);
908 int r;
909
910 assert(m)do { if ((__builtin_expect(!!(!(m)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("m"), "../src/shared/dissect-image.c", 910
, __PRETTY_FUNCTION__); } while (0);
911 assert(d)do { if ((__builtin_expect(!!(!(d)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("d"), "../src/shared/dissect-image.c", 911
, __PRETTY_FUNCTION__); } while (0);
912
913 if (!m->found || !m->node || !m->fstype)
914 return 0;
915
916 if (!streq(m->fstype, "crypto_LUKS")(strcmp((m->fstype),("crypto_LUKS")) == 0))
917 return 0;
918
919 if (!passphrase)
920 return -ENOKEY126;
921
922 r = make_dm_name_and_node(m->node, "-decrypted", &name, &node);
923 if (r < 0)
924 return r;
925
926 if (!GREEDY_REALLOC0(d->decrypted, d->n_allocated, d->n_decrypted + 1)greedy_realloc0((void**) &(d->decrypted), &(d->
n_allocated), (d->n_decrypted + 1), sizeof((d->decrypted
)[0])))
927 return -ENOMEM12;
928
929 r = crypt_init(&cd, m->node);
930 if (r < 0)
931 return log_debug_errno(r, "Failed to initialize dm-crypt: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 931, __func__, "Failed to initialize dm-crypt: %m"
) : -abs(_e); });
932
933 r = crypt_load(cd, CRYPT_LUKS((void*)0), NULL((void*)0));
934 if (r < 0)
935 return log_debug_errno(r, "Failed to load LUKS metadata: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 935, __func__, "Failed to load LUKS metadata: %m"
) : -abs(_e); });
936
937 r = crypt_activate_by_passphrase(cd, name, CRYPT_ANY_SLOT-1, passphrase, strlen(passphrase),
938 ((flags & DISSECT_IMAGE_READ_ONLY) ? CRYPT_ACTIVATE_READONLY(1 << 0) : 0) |
939 ((flags & DISSECT_IMAGE_DISCARD_ON_CRYPTO) ? CRYPT_ACTIVATE_ALLOW_DISCARDS(1 << 3) : 0));
940 if (r < 0) {
941 log_debug_errno(r, "Failed to activate LUKS device: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 941, __func__, "Failed to activate LUKS device: %m"
) : -abs(_e); });
942 return r == -EPERM1 ? -EKEYREJECTED129 : r;
943 }
944
945 d->decrypted[d->n_decrypted].name = TAKE_PTR(name)({ typeof(name) _ptr_ = (name); (name) = ((void*)0); _ptr_; }
);
946 d->decrypted[d->n_decrypted].device = TAKE_PTR(cd)({ typeof(cd) _ptr_ = (cd); (cd) = ((void*)0); _ptr_; });
947 d->n_decrypted++;
948
949 m->decrypted_node = TAKE_PTR(node)({ typeof(node) _ptr_ = (node); (node) = ((void*)0); _ptr_; }
);
950
951 return 0;
952}
953
954static int verity_partition(
955 DissectedPartition *m,
956 DissectedPartition *v,
957 const void *root_hash,
958 size_t root_hash_size,
959 DissectImageFlags flags,
960 DecryptedImage *d) {
961
962 _cleanup_free___attribute__((cleanup(freep))) char *node = NULL((void*)0), *name = NULL((void*)0);
963 _cleanup_(crypt_freep)__attribute__((cleanup(crypt_freep))) struct crypt_device *cd = NULL((void*)0);
964 int r;
965
966 assert(m)do { if ((__builtin_expect(!!(!(m)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("m"), "../src/shared/dissect-image.c", 966
, __PRETTY_FUNCTION__); } while (0);
967 assert(v)do { if ((__builtin_expect(!!(!(v)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("v"), "../src/shared/dissect-image.c", 967
, __PRETTY_FUNCTION__); } while (0);
968
969 if (!root_hash)
970 return 0;
971
972 if (!m->found || !m->node || !m->fstype)
973 return 0;
974 if (!v->found || !v->node || !v->fstype)
975 return 0;
976
977 if (!streq(v->fstype, "DM_verity_hash")(strcmp((v->fstype),("DM_verity_hash")) == 0))
978 return 0;
979
980 r = make_dm_name_and_node(m->node, "-verity", &name, &node);
981 if (r < 0)
982 return r;
983
984 if (!GREEDY_REALLOC0(d->decrypted, d->n_allocated, d->n_decrypted + 1)greedy_realloc0((void**) &(d->decrypted), &(d->
n_allocated), (d->n_decrypted + 1), sizeof((d->decrypted
)[0])))
985 return -ENOMEM12;
986
987 r = crypt_init(&cd, v->node);
988 if (r < 0)
989 return r;
990
991 r = crypt_load(cd, CRYPT_VERITY"VERITY", NULL((void*)0));
992 if (r < 0)
993 return r;
994
995 r = crypt_set_data_device(cd, m->node);
996 if (r < 0)
997 return r;
998
999 r = crypt_activate_by_volume_key(cd, name, root_hash, root_hash_size, CRYPT_ACTIVATE_READONLY(1 << 0));
1000 if (r < 0)
1001 return r;
1002
1003 d->decrypted[d->n_decrypted].name = TAKE_PTR(name)({ typeof(name) _ptr_ = (name); (name) = ((void*)0); _ptr_; }
);
1004 d->decrypted[d->n_decrypted].device = TAKE_PTR(cd)({ typeof(cd) _ptr_ = (cd); (cd) = ((void*)0); _ptr_; });
1005 d->n_decrypted++;
1006
1007 m->decrypted_node = TAKE_PTR(node)({ typeof(node) _ptr_ = (node); (node) = ((void*)0); _ptr_; }
);
1008
1009 return 0;
1010}
1011#endif
1012
1013int dissected_image_decrypt(
1014 DissectedImage *m,
1015 const char *passphrase,
1016 const void *root_hash,
1017 size_t root_hash_size,
1018 DissectImageFlags flags,
1019 DecryptedImage **ret) {
1020
1021#if HAVE_LIBCRYPTSETUP1
1022 _cleanup_(decrypted_image_unrefp)__attribute__((cleanup(decrypted_image_unrefp))) DecryptedImage *d = NULL((void*)0);
1023 unsigned i;
1024 int r;
1025#endif
1026
1027 assert(m)do { if ((__builtin_expect(!!(!(m)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("m"), "../src/shared/dissect-image.c", 1027
, __PRETTY_FUNCTION__); } while (0);
1028 assert(root_hash || root_hash_size == 0)do { if ((__builtin_expect(!!(!(root_hash || root_hash_size ==
0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("root_hash || root_hash_size == 0"
), "../src/shared/dissect-image.c", 1028, __PRETTY_FUNCTION__
); } while (0);
1029
1030 /* Returns:
1031 *
1032 * = 0 → There was nothing to decrypt
1033 * > 0 → Decrypted successfully
1034 * -ENOKEY → There's something to decrypt but no key was supplied
1035 * -EKEYREJECTED → Passed key was not correct
1036 */
1037
1038 if (root_hash && root_hash_size < sizeof(sd_id128_t))
1039 return -EINVAL22;
1040
1041 if (!m->encrypted && !m->verity) {
1042 *ret = NULL((void*)0);
1043 return 0;
1044 }
1045
1046#if HAVE_LIBCRYPTSETUP1
1047 d = new0(DecryptedImage, 1)((DecryptedImage*) calloc((1), sizeof(DecryptedImage)));
1048 if (!d)
1049 return -ENOMEM12;
1050
1051 for (i = 0; i < _PARTITION_DESIGNATOR_MAX; i++) {
1052 DissectedPartition *p = m->partitions + i;
1053 int k;
1054
1055 if (!p->found)
1056 continue;
1057
1058 r = decrypt_partition(p, passphrase, flags, d);
1059 if (r < 0)
1060 return r;
1061
1062 k = PARTITION_VERITY_OF(i);
1063 if (k >= 0) {
1064 r = verity_partition(p, m->partitions + k, root_hash, root_hash_size, flags, d);
1065 if (r < 0)
1066 return r;
1067 }
1068
1069 if (!p->decrypted_fstype && p->decrypted_node) {
1070 r = probe_filesystem(p->decrypted_node, &p->decrypted_fstype);
1071 if (r < 0 && r != -EUCLEAN117)
1072 return r;
1073 }
1074 }
1075
1076 *ret = TAKE_PTR(d)({ typeof(d) _ptr_ = (d); (d) = ((void*)0); _ptr_; });
1077
1078 return 1;
1079#else
1080 return -EOPNOTSUPP95;
1081#endif
1082}
1083
1084int dissected_image_decrypt_interactively(
1085 DissectedImage *m,
1086 const char *passphrase,
1087 const void *root_hash,
1088 size_t root_hash_size,
1089 DissectImageFlags flags,
1090 DecryptedImage **ret) {
1091
1092 _cleanup_strv_free_erase___attribute__((cleanup(strv_free_erasep))) char **z = NULL((void*)0);
1093 int n = 3, r;
1094
1095 if (passphrase)
1096 n--;
1097
1098 for (;;) {
1099 r = dissected_image_decrypt(m, passphrase, root_hash, root_hash_size, flags, ret);
1100 if (r >= 0)
1101 return r;
1102 if (r == -EKEYREJECTED129)
1103 log_error_errno(r, "Incorrect passphrase, try again!")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1103, __func__, "Incorrect passphrase, try again!"
) : -abs(_e); });
1104 else if (r != -ENOKEY126) {
1105 log_error_errno(r, "Failed to decrypt image: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1105, __func__, "Failed to decrypt image: %m"
) : -abs(_e); });
1106 return r;
1107 }
1108
1109 if (--n < 0) {
1110 log_error("Too many retries.")({ int _level = (((3))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1110, __func__, "Too many retries."
) : -abs(_e); });
1111 return -EKEYREJECTED129;
1112 }
1113
1114 z = strv_free(z);
1115
1116 r = ask_password_auto("Please enter image passphrase!", NULL((void*)0), "dissect", "dissect", USEC_INFINITY((usec_t) -1), 0, &z);
1117 if (r < 0)
1118 return log_error_errno(r, "Failed to query for passphrase: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1118, __func__, "Failed to query for passphrase: %m"
) : -abs(_e); });
1119
1120 passphrase = z[0];
1121 }
1122}
1123
1124#if HAVE_LIBCRYPTSETUP1
1125static int deferred_remove(DecryptedPartition *p) {
1126
1127 struct dm_ioctl dm = {
1128 .version = {
1129 DM_VERSION_MAJOR4,
1130 DM_VERSION_MINOR27,
1131 DM_VERSION_PATCHLEVEL0
1132 },
1133 .data_size = sizeof(dm),
1134 .flags = DM_DEFERRED_REMOVE(1 << 17),
1135 };
1136
1137 _cleanup_close___attribute__((cleanup(closep))) int fd = -1;
1138
1139 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/dissect-image.c", 1139
, __PRETTY_FUNCTION__); } while (0);
1140
1141 /* Unfortunately, libcryptsetup doesn't provide a proper API for this, hence call the ioctl() directly. */
1142
1143 fd = open("/dev/mapper/control", O_RDWR02|O_CLOEXEC02000000);
1144 if (fd < 0)
1145 return -errno(*__errno_location ());
1146
1147 strncpy(dm.name, p->name, sizeof(dm.name));
1148
1149 if (ioctl(fd, DM_DEV_REMOVE(((2U|1U) << (((0 +8)+8)+14)) | (((0xfd)) << (0 +
8)) | (((DM_DEV_REMOVE_CMD)) << 0) | ((((sizeof(struct dm_ioctl
)))) << ((0 +8)+8))), &dm))
1150 return -errno(*__errno_location ());
1151
1152 return 0;
1153}
1154#endif
1155
1156int decrypted_image_relinquish(DecryptedImage *d) {
1157
1158#if HAVE_LIBCRYPTSETUP1
1159 size_t i;
1160 int r;
1161#endif
1162
1163 assert(d)do { if ((__builtin_expect(!!(!(d)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("d"), "../src/shared/dissect-image.c", 1163
, __PRETTY_FUNCTION__); } while (0);
1164
1165 /* Turns on automatic removal after the last use ended for all DM devices of this image, and sets a boolean so
1166 * that we don't clean it up ourselves either anymore */
1167
1168#if HAVE_LIBCRYPTSETUP1
1169 for (i = 0; i < d->n_decrypted; i++) {
1170 DecryptedPartition *p = d->decrypted + i;
1171
1172 if (p->relinquished)
1173 continue;
1174
1175 r = deferred_remove(p);
1176 if (r < 0)
1177 return log_debug_errno(r, "Failed to mark %s for auto-removal: %m", p->name)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1177, __func__, "Failed to mark %s for auto-removal: %m"
, p->name) : -abs(_e); });
1178
1179 p->relinquished = true1;
1180 }
1181#endif
1182
1183 return 0;
1184}
1185
1186int root_hash_load(const char *image, void **ret, size_t *ret_size) {
1187 _cleanup_free___attribute__((cleanup(freep))) char *text = NULL((void*)0);
1188 _cleanup_free___attribute__((cleanup(freep))) void *k = NULL((void*)0);
1189 size_t l;
1190 int r;
1191
1192 assert(image)do { if ((__builtin_expect(!!(!(image)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("image"), "../src/shared/dissect-image.c"
, 1192, __PRETTY_FUNCTION__); } while (0);
1193 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/shared/dissect-image.c",
1193, __PRETTY_FUNCTION__); } while (0);
1194 assert(ret_size)do { if ((__builtin_expect(!!(!(ret_size)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret_size"), "../src/shared/dissect-image.c"
, 1194, __PRETTY_FUNCTION__); } while (0);
1195
1196 if (is_device_path(image)) {
1197 /* If we are asked to load the root hash for a device node, exit early */
1198 *ret = NULL((void*)0);
1199 *ret_size = 0;
1200 return 0;
1201 }
1202
1203 r = getxattr_malloc(image, "user.verity.roothash", &text, true1);
1204 if (r < 0) {
1205 char *fn, *e, *n;
1206
1207 if (!IN_SET(r, -ENODATA, -EOPNOTSUPP, -ENOENT)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended
[20 - sizeof((int[]){-61, -95, -2})/sizeof(int)]; switch(r) {
case -61: case -95: case -2: _found = 1; break; default: break
; } _found; }))
1208 return r;
1209
1210 fn = newa(char, strlen(image) + STRLEN(".roothash") + 1)({ do { if ((__builtin_expect(!!(!(!size_multiply_overflow(sizeof
(char), strlen(image) + (sizeof(""".roothash""") - 1) + 1))),
0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("!size_multiply_overflow(sizeof(char), strlen(image) + (sizeof(\"\"\".roothash\"\"\") - 1) + 1)"
), "../src/shared/dissect-image.c", 1210, __PRETTY_FUNCTION__
); } while (0); (char*) __builtin_alloca (sizeof(char)*(strlen
(image) + (sizeof(""".roothash""") - 1) + 1)); });
1211 n = stpcpy(fn, image);
1212 e = endswith(fn, ".raw");
1213 if (e)
1214 n = e;
1215
1216 strcpy(n, ".roothash");
1217
1218 r = read_one_line_file(fn, &text);
1219 if (r == -ENOENT2) {
1220 *ret = NULL((void*)0);
1221 *ret_size = 0;
1222 return 0;
1223 }
1224 if (r < 0)
1225 return r;
1226 }
1227
1228 r = unhexmem(text, strlen(text), &k, &l);
1229 if (r < 0)
1230 return r;
1231 if (l < sizeof(sd_id128_t))
1232 return -EINVAL22;
1233
1234 *ret = TAKE_PTR(k)({ typeof(k) _ptr_ = (k); (k) = ((void*)0); _ptr_; });
1235 *ret_size = l;
1236
1237 return 1;
1238}
1239
1240int dissected_image_acquire_metadata(DissectedImage *m) {
1241
1242 enum {
1243 META_HOSTNAME,
1244 META_MACHINE_ID,
1245 META_MACHINE_INFO,
1246 META_OS_RELEASE,
1247 _META_MAX,
1248 };
1249
1250 static const char *const paths[_META_MAX] = {
1251 [META_HOSTNAME] = "/etc/hostname\0",
1252 [META_MACHINE_ID] = "/etc/machine-id\0",
1253 [META_MACHINE_INFO] = "/etc/machine-info\0",
1254 [META_OS_RELEASE] = "/etc/os-release\0/usr/lib/os-release\0",
1255 };
1256
1257 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **machine_info = NULL((void*)0), **os_release = NULL((void*)0);
1258 _cleanup_(rmdir_and_freep)__attribute__((cleanup(rmdir_and_freep))) char *t = NULL((void*)0);
1259 _cleanup_(sigkill_waitp)__attribute__((cleanup(sigkill_waitp))) pid_t child = 0;
1260 sd_id128_t machine_id = SD_ID128_NULL((const sd_id128_t) { .qwords = { 0, 0 }});
1261 _cleanup_free___attribute__((cleanup(freep))) char *hostname = NULL((void*)0);
1262 unsigned n_meta_initialized = 0, k;
1263 int fds[2 * _META_MAX], r;
1264
1265 BLOCK_SIGNALS(SIGCHLD)__attribute__((cleanup(block_signals_reset))) __attribute__ (
(unused)) sigset_t _saved_sigset = ({ sigset_t _t; do { if ((
__builtin_expect(!!(!(sigprocmask_many(0, &_t, 17, -1) >=
0)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("sigprocmask_many(SIG_BLOCK, &_t, 17, -1) >= 0"
), "../src/shared/dissect-image.c", 1265, __PRETTY_FUNCTION__
); } while (0); _t; });
1266
1267 assert(m)do { if ((__builtin_expect(!!(!(m)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("m"), "../src/shared/dissect-image.c", 1267
, __PRETTY_FUNCTION__); } while (0);
1268
1269 for (; n_meta_initialized < _META_MAX; n_meta_initialized ++)
1270 if (pipe2(fds + 2*n_meta_initialized, O_CLOEXEC02000000) < 0) {
1271 r = -errno(*__errno_location ());
1272 goto finish;
1273 }
1274
1275 r = mkdtemp_malloc("/tmp/dissect-XXXXXX", &t);
1276 if (r < 0)
1277 goto finish;
1278
1279 r = safe_fork("(sd-dissect)", FORK_RESET_SIGNALS|FORK_DEATHSIG|FORK_NEW_MOUNTNS|FORK_MOUNTNS_SLAVE, &child);
1280 if (r < 0)
1281 goto finish;
1282 if (r == 0) {
1283 r = dissected_image_mount(m, t, UID_INVALID((uid_t) -1), DISSECT_IMAGE_READ_ONLY|DISSECT_IMAGE_MOUNT_ROOT_ONLY|DISSECT_IMAGE_VALIDATE_OS);
1284 if (r < 0) {
1285 log_debug_errno(r, "Failed to mount dissected image: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1285, __func__, "Failed to mount dissected image: %m"
) : -abs(_e); });
1286 _exit(EXIT_FAILURE1);
1287 }
1288
1289 for (k = 0; k < _META_MAX; k++) {
1290 _cleanup_close___attribute__((cleanup(closep))) int fd = -1;
1291 const char *p;
1292
1293 fds[2*k] = safe_close(fds[2*k]);
1294
1295 NULSTR_FOREACH(p, paths[k])for ((p) = (paths[k]); (p) && *(p); (p) = strchr((p),
0)+1) {
1296 fd = chase_symlinks_and_open(p, t, CHASE_PREFIX_ROOT, O_RDONLY00|O_CLOEXEC02000000|O_NOCTTY0400, NULL((void*)0));
1297 if (fd >= 0)
1298 break;
1299 }
1300 if (fd < 0) {
1301 log_debug_errno(fd, "Failed to read %s file of image, ignoring: %m", paths[k])({ int _level = ((7)), _e = ((fd)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1301, __func__, "Failed to read %s file of image, ignoring: %m"
, paths[k]) : -abs(_e); });
1302 continue;
1303 }
1304
1305 r = copy_bytes(fd, fds[2*k+1], (uint64_t) -1, 0);
1306 if (r < 0)
1307 _exit(EXIT_FAILURE1);
1308
1309 fds[2*k+1] = safe_close(fds[2*k+1]);
1310 }
1311
1312 _exit(EXIT_SUCCESS0);
1313 }
1314
1315 for (k = 0; k < _META_MAX; k++) {
1316 _cleanup_fclose___attribute__((cleanup(fclosep))) FILE *f = NULL((void*)0);
1317
1318 fds[2*k+1] = safe_close(fds[2*k+1]);
1319
1320 f = fdopen(fds[2*k], "re");
1321 if (!f) {
1322 r = -errno(*__errno_location ());
1323 goto finish;
1324 }
1325
1326 fds[2*k] = -1;
1327
1328 switch (k) {
1329
1330 case META_HOSTNAME:
1331 r = read_etc_hostname_stream(f, &hostname);
1332 if (r < 0)
1333 log_debug_errno(r, "Failed to read /etc/hostname: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1333, __func__, "Failed to read /etc/hostname: %m"
) : -abs(_e); });
1334
1335 break;
1336
1337 case META_MACHINE_ID: {
1338 _cleanup_free___attribute__((cleanup(freep))) char *line = NULL((void*)0);
1339
1340 r = read_line(f, LONG_LINE_MAX(1U*1024U*1024U), &line);
1341 if (r < 0)
1342 log_debug_errno(r, "Failed to read /etc/machine-id: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1342, __func__, "Failed to read /etc/machine-id: %m"
) : -abs(_e); });
1343 else if (r == 33) {
1344 r = sd_id128_from_string(line, &machine_id);
1345 if (r < 0)
1346 log_debug_errno(r, "Image contains invalid /etc/machine-id: %s", line)({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1346, __func__, "Image contains invalid /etc/machine-id: %s"
, line) : -abs(_e); });
1347 } else if (r == 0)
1348 log_debug("/etc/machine-id file is empty.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1348, __func__, "/etc/machine-id file is empty."
) : -abs(_e); });
1349 else
1350 log_debug("/etc/machine-id has unexpected length %i.", r)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1350, __func__, "/etc/machine-id has unexpected length %i."
, r) : -abs(_e); });
1351
1352 break;
1353 }
1354
1355 case META_MACHINE_INFO:
1356 r = load_env_file_pairs(f, "machine-info", NULL((void*)0), &machine_info);
1357 if (r < 0)
1358 log_debug_errno(r, "Failed to read /etc/machine-info: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1358, __func__, "Failed to read /etc/machine-info: %m"
) : -abs(_e); });
1359
1360 break;
1361
1362 case META_OS_RELEASE:
1363 r = load_env_file_pairs(f, "os-release", NULL((void*)0), &os_release);
1364 if (r < 0)
1365 log_debug_errno(r, "Failed to read OS release file: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1365, __func__, "Failed to read OS release file: %m"
) : -abs(_e); });
1366
1367 break;
1368 }
1369 }
1370
1371 r = wait_for_terminate_and_check("(sd-dissect)", child, 0);
1372 child = 0;
1373 if (r < 0)
1374 goto finish;
1375 if (r != EXIT_SUCCESS0)
1376 return -EPROTO71;
1377
1378 free_and_replace(m->hostname, hostname)({ free(m->hostname); (m->hostname) = (hostname); (hostname
) = ((void*)0); 0; });
1379 m->machine_id = machine_id;
1380 strv_free_and_replace(m->machine_info, machine_info)({ strv_free(m->machine_info); (m->machine_info) = (machine_info
); (machine_info) = ((void*)0); 0; });
1381 strv_free_and_replace(m->os_release, os_release)({ strv_free(m->os_release); (m->os_release) = (os_release
); (os_release) = ((void*)0); 0; });
1382
1383finish:
1384 for (k = 0; k < n_meta_initialized; k++)
1385 safe_close_pair(fds + 2*k);
1386
1387 return r;
1388}
1389
1390int dissect_image_and_warn(
1391 int fd,
1392 const char *name,
1393 const void *root_hash,
1394 size_t root_hash_size,
1395 DissectImageFlags flags,
1396 DissectedImage **ret) {
1397
1398 _cleanup_free___attribute__((cleanup(freep))) char *buffer = NULL((void*)0);
1399 int r;
1400
1401 if (!name) {
1402 r = fd_get_path(fd, &buffer);
1403 if (r < 0)
1404 return r;
1405
1406 name = buffer;
1407 }
1408
1409 r = dissect_image(fd, root_hash, root_hash_size, flags, ret);
1410
1411 switch (r) {
1412
1413 case -EOPNOTSUPP95:
1414 return log_error_errno(r, "Dissecting images is not supported, compiled without blkid support.")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1414, __func__, "Dissecting images is not supported, compiled without blkid support."
) : -abs(_e); });
1415
1416 case -ENOPKG65:
1417 return log_error_errno(r, "Couldn't identify a suitable partition table or file system in '%s'.", name)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1417, __func__, "Couldn't identify a suitable partition table or file system in '%s'."
, name) : -abs(_e); });
1418
1419 case -EADDRNOTAVAIL99:
1420 return log_error_errno(r, "No root partition for specified root hash found in '%s'.", name)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1420, __func__, "No root partition for specified root hash found in '%s'."
, name) : -abs(_e); });
1421
1422 case -ENOTUNIQ76:
1423 return log_error_errno(r, "Multiple suitable root partitions found in image '%s'.", name)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1423, __func__, "Multiple suitable root partitions found in image '%s'."
, name) : -abs(_e); });
1424
1425 case -ENXIO6:
1426 return log_error_errno(r, "No suitable root partition found in image '%s'.", name)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1426, __func__, "No suitable root partition found in image '%s'."
, name) : -abs(_e); });
1427
1428 case -EPROTONOSUPPORT93:
1429 return log_error_errno(r, "Device '%s' is loopback block device with partition scanning turned off, please turn it on.", name)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1429, __func__, "Device '%s' is loopback block device with partition scanning turned off, please turn it on."
, name) : -abs(_e); });
1430
1431 default:
1432 if (r < 0)
1433 return log_error_errno(r, "Failed to dissect image '%s': %m", name)({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/dissect-image.c", 1433, __func__, "Failed to dissect image '%s': %m"
, name) : -abs(_e); });
1434
1435 return r;
1436 }
1437}
1438
1439static const char *const partition_designator_table[] = {
1440 [PARTITION_ROOT] = "root",
1441 [PARTITION_ROOT_SECONDARY] = "root-secondary",
1442 [PARTITION_HOME] = "home",
1443 [PARTITION_SRV] = "srv",
1444 [PARTITION_ESP] = "esp",
1445 [PARTITION_SWAP] = "swap",
1446 [PARTITION_ROOT_VERITY] = "root-verity",
1447 [PARTITION_ROOT_SECONDARY_VERITY] = "root-secondary-verity",
1448};
1449
1450DEFINE_STRING_TABLE_LOOKUP(partition_designator, int)const char *partition_designator_to_string(int i) { if (i <
0 || i >= (int) __extension__ (__builtin_choose_expr( !__builtin_types_compatible_p
(typeof(partition_designator_table), typeof(&*(partition_designator_table
))), sizeof(partition_designator_table)/sizeof((partition_designator_table
)[0]), ((void)0)))) return ((void*)0); return partition_designator_table
[i]; } int partition_designator_from_string(const char *s) { return
(int) string_table_lookup(partition_designator_table, __extension__
(__builtin_choose_expr( !__builtin_types_compatible_p(typeof
(partition_designator_table), typeof(&*(partition_designator_table
))), sizeof(partition_designator_table)/sizeof((partition_designator_table
)[0]), ((void)0))), s); };