]>
Commit | Line | Data |
---|---|---|
f5e04665 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
f5e04665 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
f5e04665 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
f5e04665 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <unistd.h> | |
803a3464 LP |
24 | #include <stdio.h> |
25 | #include <sys/prctl.h> | |
34c10968 | 26 | #include <sys/types.h> |
cacd6403 | 27 | #include <sys/xattr.h> |
f5e04665 LP |
28 | |
29 | #include <systemd/sd-journal.h> | |
30 | #include <systemd/sd-login.h> | |
31 | ||
32 | #include "log.h" | |
33 | #include "util.h" | |
1eef15b1 | 34 | #include "strv.h" |
b7f7c685 | 35 | #include "macro.h" |
49e942b2 | 36 | #include "mkdir.h" |
803a3464 | 37 | #include "special.h" |
ba1261bc | 38 | #include "cgroup-util.h" |
d18d46ec | 39 | #include "journald-native.h" |
34c10968 LP |
40 | #include "conf-parser.h" |
41 | #include "copy.h" | |
8d4e028f | 42 | #include "stacktrace.h" |
6388c315 | 43 | #include "path-util.h" |
34c10968 LP |
44 | |
45 | #ifdef HAVE_ACL | |
46 | #include <sys/acl.h> | |
47 | #include "acl-util.h" | |
48 | #endif | |
49 | ||
50 | /* The maximum size up to which we process coredumps */ | |
51 | #define PROCESS_SIZE_MAX ((off_t) (2LLU*1024LLU*1024LLU*1024LLU)) | |
52 | ||
53 | /* The maximum size up to which we leave the coredump around on | |
54 | * disk */ | |
55 | #define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX | |
56 | ||
57 | /* The maximum size up to which we store the coredump in the | |
58 | * journal */ | |
59 | #define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) | |
f5e04665 | 60 | |
c4aa09b0 LP |
61 | /* Make sure to not make this larger than the maximum journal entry |
62 | * size. See ENTRY_SIZE_MAX in journald-native.c. */ | |
34c10968 | 63 | assert_cc(JOURNAL_SIZE_MAX <= ENTRY_SIZE_MAX); |
f5e04665 LP |
64 | |
65 | enum { | |
1eef15b1 ZJS |
66 | INFO_PID, |
67 | INFO_UID, | |
68 | INFO_GID, | |
69 | INFO_SIGNAL, | |
70 | INFO_TIMESTAMP, | |
71 | INFO_COMM, | |
72 | INFO_EXE, | |
73 | _INFO_LEN | |
f5e04665 LP |
74 | }; |
75 | ||
34c10968 LP |
76 | typedef enum CoredumpStorage { |
77 | COREDUMP_STORAGE_NONE, | |
78 | COREDUMP_STORAGE_EXTERNAL, | |
79 | COREDUMP_STORAGE_JOURNAL, | |
80 | COREDUMP_STORAGE_BOTH, | |
81 | _COREDUMP_STORAGE_MAX, | |
82 | _COREDUMP_STORAGE_INVALID = -1 | |
83 | } CoredumpStorage; | |
84 | ||
85 | static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
86 | static off_t arg_process_size_max = PROCESS_SIZE_MAX; | |
87 | static off_t arg_external_size_max = EXTERNAL_SIZE_MAX; | |
88 | static size_t arg_journal_size_max = JOURNAL_SIZE_MAX; | |
89 | ||
90 | static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { | |
91 | [COREDUMP_STORAGE_NONE] = "none", | |
92 | [COREDUMP_STORAGE_EXTERNAL] = "external", | |
93 | [COREDUMP_STORAGE_JOURNAL] = "journal", | |
94 | [COREDUMP_STORAGE_BOTH] = "both", | |
95 | }; | |
96 | ||
97 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); | |
98 | static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); | |
99 | ||
100 | static int parse_config(void) { | |
101 | ||
102 | static const ConfigTableItem items[] = { | |
103 | { "Coredump", "ProcessSizeMax", config_parse_iec_off, 0, &arg_process_size_max }, | |
104 | { "Coredump", "ExternalSizeMax", config_parse_iec_off, 0, &arg_external_size_max }, | |
105 | { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, | |
106 | { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, | |
107 | {} | |
108 | }; | |
109 | ||
110 | return config_parse( | |
111 | NULL, | |
112 | "/etc/systemd/coredump.conf", | |
113 | NULL, | |
114 | "Coredump\0", | |
115 | config_item_table_lookup, | |
116 | (void*) items, | |
117 | false, | |
118 | false, | |
119 | NULL); | |
120 | } | |
121 | ||
122 | static int fix_acl(int fd, uid_t uid) { | |
123 | ||
124 | #ifdef HAVE_ACL | |
125 | _cleanup_(acl_freep) acl_t acl = NULL; | |
126 | acl_entry_t entry; | |
127 | acl_permset_t permset; | |
128 | ||
129 | if (uid <= SYSTEM_UID_MAX) | |
130 | return 0; | |
131 | ||
132 | /* Make sure normal users can read (but not write or delete) | |
133 | * their own coredumps */ | |
134 | ||
135 | acl = acl_get_fd(fd); | |
136 | if (!acl) { | |
137 | log_error("Failed to get ACL: %m"); | |
138 | return -errno; | |
139 | } | |
140 | ||
141 | if (acl_create_entry(&acl, &entry) < 0 || | |
142 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
143 | acl_set_qualifier(entry, &uid) < 0) { | |
144 | log_error("Failed to patch ACL: %m"); | |
145 | return -errno; | |
146 | } | |
147 | ||
148 | if (acl_get_permset(entry, &permset) < 0 || | |
149 | acl_add_perm(permset, ACL_READ) < 0 || | |
150 | calc_acl_mask_if_needed(&acl) < 0) { | |
151 | log_warning("Failed to patch ACL: %m"); | |
152 | return -errno; | |
153 | } | |
154 | ||
155 | if (acl_set_fd(fd, acl) < 0) { | |
156 | log_error("Failed to apply ACL: %m"); | |
157 | return -errno; | |
158 | } | |
159 | #endif | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
1eef15b1 | 164 | static int fix_xattr(int fd, const char *info[_INFO_LEN]) { |
0cd77f97 | 165 | |
1eef15b1 ZJS |
166 | static const char * const xattrs[_INFO_LEN] = { |
167 | [INFO_PID] = "user.coredump.pid", | |
168 | [INFO_UID] = "user.coredump.uid", | |
169 | [INFO_GID] = "user.coredump.gid", | |
170 | [INFO_SIGNAL] = "user.coredump.signal", | |
171 | [INFO_TIMESTAMP] = "user.coredump.timestamp", | |
172 | [INFO_COMM] = "user.coredump.comm", | |
173 | [INFO_EXE] = "user.coredump.exe", | |
0cd77f97 LP |
174 | }; |
175 | ||
34c10968 | 176 | int r = 0; |
0cd77f97 | 177 | unsigned i; |
34c10968 | 178 | |
1eef15b1 | 179 | /* Attach some metadata to coredumps via extended |
34c10968 LP |
180 | * attributes. Just because we can. */ |
181 | ||
1eef15b1 ZJS |
182 | for (i = 0; i < _INFO_LEN; i++) { |
183 | int k; | |
184 | ||
185 | if (isempty(info[i]) || !xattrs[i]) | |
0cd77f97 | 186 | continue; |
34c10968 | 187 | |
1eef15b1 ZJS |
188 | k = fsetxattr(fd, xattrs[i], info[i], strlen(info[i]), XATTR_CREATE); |
189 | if (k < 0 && r == 0) | |
34c10968 | 190 | r = -errno; |
0cd77f97 | 191 | } |
34c10968 LP |
192 | |
193 | return r; | |
194 | } | |
195 | ||
b0b21dce | 196 | #define filename_escape(s) xescape((s), "./ ") |
34c10968 | 197 | |
1eef15b1 ZJS |
198 | static int save_external_coredump(const char *info[_INFO_LEN], |
199 | uid_t uid, | |
200 | char **ret_filename, | |
201 | int *ret_fd, | |
202 | off_t *ret_size) { | |
203 | ||
34c10968 LP |
204 | _cleanup_free_ char *p = NULL, *t = NULL, *c = NULL, *fn = NULL, *tmp = NULL; |
205 | _cleanup_close_ int fd = -1; | |
206 | sd_id128_t boot; | |
207 | struct stat st; | |
208 | int r; | |
209 | ||
1eef15b1 | 210 | assert(info); |
34c10968 LP |
211 | assert(ret_filename); |
212 | assert(ret_fd); | |
213 | assert(ret_size); | |
214 | ||
1eef15b1 | 215 | c = filename_escape(info[INFO_COMM]); |
34c10968 LP |
216 | if (!c) |
217 | return log_oom(); | |
218 | ||
1eef15b1 | 219 | p = filename_escape(info[INFO_PID]); |
34c10968 LP |
220 | if (!p) |
221 | return log_oom(); | |
222 | ||
1eef15b1 | 223 | t = filename_escape(info[INFO_TIMESTAMP]); |
34c10968 LP |
224 | if (!t) |
225 | return log_oom(); | |
226 | ||
227 | r = sd_id128_get_boot(&boot); | |
228 | if (r < 0) { | |
229 | log_error("Failed to determine boot ID: %s", strerror(-r)); | |
230 | return r; | |
231 | } | |
232 | ||
233 | r = asprintf(&fn, | |
234 | "/var/lib/systemd/coredump/core.%s." SD_ID128_FORMAT_STR ".%s.%s000000", | |
235 | c, | |
236 | SD_ID128_FORMAT_VAL(boot), | |
237 | p, | |
238 | t); | |
239 | if (r < 0) | |
240 | return log_oom(); | |
241 | ||
242 | tmp = tempfn_random(fn); | |
243 | if (!tmp) | |
244 | return log_oom(); | |
803a3464 | 245 | |
d2e54fae | 246 | mkdir_p_label("/var/lib/systemd/coredump", 0755); |
803a3464 | 247 | |
34c10968 LP |
248 | fd = open(tmp, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640); |
249 | if (fd < 0) { | |
803a3464 LP |
250 | log_error("Failed to create coredump file: %m"); |
251 | return -errno; | |
252 | } | |
253 | ||
93240d3a LP |
254 | r = copy_bytes(STDIN_FILENO, fd, arg_process_size_max); |
255 | if (r == -E2BIG) { | |
1eef15b1 ZJS |
256 | log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", |
257 | info[INFO_PID], info[INFO_COMM]); | |
93240d3a LP |
258 | goto fail; |
259 | } else if (IN_SET(r, -EDQUOT, -ENOSPC)) { | |
1eef15b1 ZJS |
260 | log_error("Not enough disk space for coredump of %s (%s), refusing.", |
261 | info[INFO_PID], info[INFO_COMM]); | |
93240d3a LP |
262 | goto fail; |
263 | } else if (r < 0) { | |
34c10968 LP |
264 | log_error("Failed to dump coredump to file: %s", strerror(-r)); |
265 | goto fail; | |
266 | } | |
803a3464 | 267 | |
34c10968 LP |
268 | /* Ignore errors on these */ |
269 | fchmod(fd, 0640); | |
270 | fix_acl(fd, uid); | |
1eef15b1 | 271 | fix_xattr(fd, info); |
803a3464 | 272 | |
34c10968 | 273 | if (fsync(fd) < 0) { |
1eef15b1 | 274 | log_error("Failed to sync coredump %s: %m", tmp); |
34c10968 LP |
275 | r = -errno; |
276 | goto fail; | |
277 | } | |
803a3464 | 278 | |
34c10968 | 279 | if (fstat(fd, &st) < 0) { |
1eef15b1 | 280 | log_error("Failed to fstat coredump %s: %m", tmp); |
34c10968 LP |
281 | r = -errno; |
282 | goto fail; | |
283 | } | |
284 | ||
285 | if (rename(tmp, fn) < 0) { | |
1eef15b1 | 286 | log_error("Failed to rename coredump %s -> %s: %m", tmp, fn); |
34c10968 LP |
287 | r = -errno; |
288 | goto fail; | |
289 | } | |
290 | ||
291 | *ret_filename = fn; | |
292 | *ret_fd = fd; | |
293 | *ret_size = st.st_size; | |
294 | ||
295 | fn = NULL; | |
296 | fd = -1; | |
297 | ||
298 | return 0; | |
299 | ||
300 | fail: | |
301 | unlink_noerrno(tmp); | |
302 | return r; | |
303 | } | |
304 | ||
305 | static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { | |
306 | _cleanup_free_ char *field = NULL; | |
307 | ssize_t n; | |
308 | ||
8d4e028f | 309 | assert(fd >= 0); |
34c10968 LP |
310 | assert(ret); |
311 | assert(ret_size); | |
312 | ||
313 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { | |
314 | log_warning("Failed to seek: %m"); | |
315 | return -errno; | |
803a3464 LP |
316 | } |
317 | ||
34c10968 LP |
318 | field = malloc(9 + size); |
319 | if (!field) { | |
320 | log_warning("Failed to allocate memory fore coredump, coredump will not be stored."); | |
321 | return -ENOMEM; | |
322 | } | |
323 | ||
324 | memcpy(field, "COREDUMP=", 9); | |
325 | ||
326 | n = read(fd, field + 9, size); | |
327 | if (n < 0) { | |
328 | log_error("Failed to read core data: %s", strerror(-n)); | |
329 | return (int) n; | |
330 | } | |
331 | if ((size_t) n < size) { | |
332 | log_error("Core data too short."); | |
333 | return -EIO; | |
334 | } | |
335 | ||
336 | *ret = field; | |
337 | *ret_size = size + 9; | |
338 | ||
339 | field = NULL; | |
340 | ||
341 | return 0; | |
342 | } | |
803a3464 | 343 | |
34c10968 LP |
344 | static int maybe_remove_external_coredump(const char *filename, off_t size) { |
345 | ||
346 | if (!filename) | |
347 | return 0; | |
348 | ||
349 | if (IN_SET(arg_storage, COREDUMP_STORAGE_EXTERNAL, COREDUMP_STORAGE_BOTH) && | |
350 | size <= arg_external_size_max) | |
351 | return 0; | |
352 | ||
353 | if (unlink(filename) < 0) { | |
354 | log_error("Failed to unlink %s: %m", filename); | |
b7f7c685 | 355 | return -errno; |
803a3464 LP |
356 | } |
357 | ||
b7f7c685 | 358 | return 0; |
803a3464 LP |
359 | } |
360 | ||
f5e04665 | 361 | int main(int argc, char* argv[]) { |
34c10968 LP |
362 | |
363 | _cleanup_free_ char *core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL, | |
364 | *core_timestamp = NULL, *core_comm = NULL, *core_exe = NULL, *core_unit = NULL, | |
365 | *core_session = NULL, *core_message = NULL, *core_cmdline = NULL, *coredump_data = NULL, | |
8d4e028f | 366 | *coredump_filename = NULL, *core_slice = NULL, *core_cgroup = NULL, *core_owner_uid = NULL, |
1eef15b1 ZJS |
367 | *exe = NULL, *comm = NULL; |
368 | const char *info[_INFO_LEN]; | |
34c10968 LP |
369 | |
370 | _cleanup_close_ int coredump_fd = -1; | |
371 | ||
a035f819 | 372 | struct iovec iovec[17]; |
34c10968 | 373 | off_t coredump_size; |
f5e04665 | 374 | int r, j = 0; |
a035f819 | 375 | uid_t uid, owner_uid; |
fee80f69 | 376 | gid_t gid; |
a035f819 | 377 | pid_t pid; |
34c10968 | 378 | char *t; |
f5e04665 | 379 | |
34c10968 | 380 | /* Make sure we never enter a loop */ |
803a3464 | 381 | prctl(PR_SET_DUMPABLE, 0); |
f5e04665 | 382 | |
34c10968 LP |
383 | /* First, log to a safe place, since we don't know what |
384 | * crashed and it might be journald which we'd rather not log | |
385 | * to then. */ | |
386 | log_set_target(LOG_TARGET_KMSG); | |
34c10968 | 387 | log_open(); |
803a3464 | 388 | |
1eef15b1 ZJS |
389 | if (argc < INFO_COMM + 1) { |
390 | log_error("Not enough arguments passed from kernel (%d, expected %d).", | |
391 | argc - 1, INFO_COMM + 1 - 1); | |
f5e04665 LP |
392 | r = -EINVAL; |
393 | goto finish; | |
394 | } | |
395 | ||
34c10968 LP |
396 | /* Ignore all parse errors */ |
397 | parse_config(); | |
398 | log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); | |
399 | ||
1eef15b1 | 400 | r = parse_uid(argv[INFO_UID + 1], &uid); |
f5e04665 | 401 | if (r < 0) { |
34c10968 LP |
402 | log_error("Failed to parse UID."); |
403 | goto finish; | |
404 | } | |
803a3464 | 405 | |
1eef15b1 | 406 | r = parse_pid(argv[INFO_PID + 1], &pid); |
34c10968 | 407 | if (r < 0) { |
f5e04665 | 408 | log_error("Failed to parse PID."); |
f5e04665 LP |
409 | goto finish; |
410 | } | |
411 | ||
1eef15b1 | 412 | r = parse_gid(argv[INFO_GID + 1], &gid); |
34c10968 LP |
413 | if (r < 0) { |
414 | log_error("Failed to parse GID."); | |
415 | goto finish; | |
416 | } | |
417 | ||
1eef15b1 ZJS |
418 | if (get_process_comm(pid, &comm) < 0) { |
419 | log_warning("Failed to get COMM, falling back to the commandline."); | |
420 | comm = strv_join(argv + INFO_COMM + 1, " "); | |
421 | } | |
422 | ||
423 | if (get_process_exe(pid, &exe) < 0) | |
424 | log_warning("Failed to get EXE."); | |
425 | ||
426 | info[INFO_PID] = argv[INFO_PID + 1]; | |
427 | info[INFO_UID] = argv[INFO_UID + 1]; | |
428 | info[INFO_GID] = argv[INFO_GID + 1]; | |
429 | info[INFO_SIGNAL] = argv[INFO_SIGNAL + 1]; | |
430 | info[INFO_TIMESTAMP] = argv[INFO_TIMESTAMP + 1]; | |
431 | info[INFO_COMM] = comm; | |
432 | info[INFO_EXE] = exe; | |
433 | ||
ba1261bc | 434 | if (cg_pid_get_unit(pid, &t) >= 0) { |
803a3464 LP |
435 | |
436 | if (streq(t, SPECIAL_JOURNALD_SERVICE)) { | |
803a3464 | 437 | |
34c10968 LP |
438 | /* If we are journald, we cut things short, |
439 | * don't write to the journal, but still | |
440 | * create a coredump. */ | |
441 | ||
442 | if (arg_storage != COREDUMP_STORAGE_NONE) | |
443 | arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
444 | ||
1eef15b1 | 445 | r = save_external_coredump(info, uid, &coredump_filename, &coredump_fd, &coredump_size); |
34c10968 LP |
446 | if (r < 0) |
447 | goto finish; | |
448 | ||
449 | r = maybe_remove_external_coredump(coredump_filename, coredump_size); | |
450 | if (r < 0) | |
451 | goto finish; | |
452 | ||
453 | log_info("Detected coredump of the journal daemon itself, diverted to %s.", coredump_filename); | |
803a3464 LP |
454 | goto finish; |
455 | } | |
456 | ||
457 | core_unit = strappend("COREDUMP_UNIT=", t); | |
b7f7c685 | 458 | } else if (cg_pid_get_user_unit(pid, &t) >= 0) |
f9045468 | 459 | core_unit = strappend("COREDUMP_USER_UNIT=", t); |
803a3464 | 460 | |
f9045468 MT |
461 | if (core_unit) |
462 | IOVEC_SET_STRING(iovec[j++], core_unit); | |
463 | ||
34c10968 LP |
464 | /* OK, now we know it's not the journal, hence we can make use |
465 | * of it now. */ | |
803a3464 LP |
466 | log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); |
467 | log_open(); | |
468 | ||
1eef15b1 | 469 | core_pid = strappend("COREDUMP_PID=", info[INFO_PID]); |
f5e04665 LP |
470 | if (core_pid) |
471 | IOVEC_SET_STRING(iovec[j++], core_pid); | |
472 | ||
1eef15b1 | 473 | core_uid = strappend("COREDUMP_UID=", info[INFO_UID]); |
f5e04665 LP |
474 | if (core_uid) |
475 | IOVEC_SET_STRING(iovec[j++], core_uid); | |
476 | ||
1eef15b1 | 477 | core_gid = strappend("COREDUMP_GID=", info[INFO_GID]); |
f5e04665 LP |
478 | if (core_gid) |
479 | IOVEC_SET_STRING(iovec[j++], core_gid); | |
480 | ||
1eef15b1 | 481 | core_signal = strappend("COREDUMP_SIGNAL=", info[INFO_SIGNAL]); |
f5e04665 LP |
482 | if (core_signal) |
483 | IOVEC_SET_STRING(iovec[j++], core_signal); | |
484 | ||
f5e04665 LP |
485 | if (sd_pid_get_session(pid, &t) >= 0) { |
486 | core_session = strappend("COREDUMP_SESSION=", t); | |
487 | free(t); | |
488 | ||
489 | if (core_session) | |
490 | IOVEC_SET_STRING(iovec[j++], core_session); | |
491 | } | |
492 | ||
a035f819 LP |
493 | if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { |
494 | asprintf(&core_owner_uid, "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); | |
495 | ||
496 | if (core_owner_uid) | |
497 | IOVEC_SET_STRING(iovec[j++], core_owner_uid); | |
498 | } | |
499 | ||
500 | if (sd_pid_get_slice(pid, &t) >= 0) { | |
501 | core_slice = strappend("COREDUMP_SLICE=", t); | |
502 | free(t); | |
503 | ||
504 | if (core_slice) | |
505 | IOVEC_SET_STRING(iovec[j++], core_slice); | |
506 | } | |
507 | ||
1eef15b1 ZJS |
508 | if (comm) { |
509 | core_comm = strappend("COREDUMP_COMM=", comm); | |
510 | if (core_comm) | |
511 | IOVEC_SET_STRING(iovec[j++], core_comm); | |
512 | } | |
513 | ||
514 | if (exe) { | |
8d4e028f | 515 | core_exe = strappend("COREDUMP_EXE=", exe); |
f5e04665 LP |
516 | if (core_exe) |
517 | IOVEC_SET_STRING(iovec[j++], core_exe); | |
518 | } | |
519 | ||
9bdbc2e2 | 520 | if (get_process_cmdline(pid, 0, false, &t) >= 0) { |
f5e04665 LP |
521 | core_cmdline = strappend("COREDUMP_CMDLINE=", t); |
522 | free(t); | |
523 | ||
524 | if (core_cmdline) | |
525 | IOVEC_SET_STRING(iovec[j++], core_cmdline); | |
526 | } | |
527 | ||
a035f819 LP |
528 | if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) { |
529 | core_cgroup = strappend("COREDUMP_CGROUP=", t); | |
530 | free(t); | |
531 | ||
532 | if (core_cgroup) | |
533 | IOVEC_SET_STRING(iovec[j++], core_cgroup); | |
534 | } | |
535 | ||
1eef15b1 | 536 | core_timestamp = strjoin("COREDUMP_TIMESTAMP=", info[INFO_TIMESTAMP], "000000", NULL); |
f5e04665 LP |
537 | if (core_timestamp) |
538 | IOVEC_SET_STRING(iovec[j++], core_timestamp); | |
539 | ||
540 | IOVEC_SET_STRING(iovec[j++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); | |
541 | IOVEC_SET_STRING(iovec[j++], "PRIORITY=2"); | |
542 | ||
34c10968 | 543 | /* Always stream the coredump to disk, if that's possible */ |
1eef15b1 | 544 | r = save_external_coredump(info, uid, &coredump_filename, &coredump_fd, &coredump_size); |
34c10968 | 545 | if (r < 0) |
2424a475 ZJS |
546 | /* skip whole core dumping part */ |
547 | goto log; | |
34c10968 LP |
548 | |
549 | /* If we don't want to keep the coredump on disk, remove it | |
8d4e028f LP |
550 | * now, as later on we will lack the privileges for |
551 | * it. However, we keep the fd to it, so that we can still | |
552 | * process it and log it. */ | |
34c10968 LP |
553 | r = maybe_remove_external_coredump(coredump_filename, coredump_size); |
554 | if (r < 0) | |
555 | goto finish; | |
556 | ||
fee80f69 LP |
557 | /* Now, let's drop privileges to become the user who owns the |
558 | * segfaulted process and allocate the coredump memory under | |
559 | * his uid. This also ensures that the credentials journald | |
560 | * will see are the ones of the coredumping user, thus making | |
561 | * sure the user himself gets access to the core dump. */ | |
fee80f69 LP |
562 | if (setresgid(gid, gid, gid) < 0 || |
563 | setresuid(uid, uid, uid) < 0) { | |
564 | log_error("Failed to drop privileges: %m"); | |
565 | r = -errno; | |
566 | goto finish; | |
567 | } | |
568 | ||
8d4e028f LP |
569 | #ifdef HAVE_ELFUTILS |
570 | /* Try to get a strack trace if we can */ | |
571 | if (coredump_size <= arg_process_size_max) { | |
572 | _cleanup_free_ char *stacktrace = NULL; | |
573 | ||
574 | r = coredump_make_stack_trace(coredump_fd, exe, &stacktrace); | |
575 | if (r >= 0) | |
1eef15b1 | 576 | core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.\n\n", stacktrace, NULL); |
8d4e028f LP |
577 | else |
578 | log_warning("Failed to generate stack trace: %s", strerror(-r)); | |
579 | } | |
580 | ||
581 | if (!core_message) | |
582 | #endif | |
2424a475 | 583 | log: |
1eef15b1 | 584 | core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.", NULL); |
8d4e028f LP |
585 | if (core_message) |
586 | IOVEC_SET_STRING(iovec[j++], core_message); | |
587 | ||
34c10968 LP |
588 | /* Optionally store the entire coredump in the journal */ |
589 | if (IN_SET(arg_storage, COREDUMP_STORAGE_JOURNAL, COREDUMP_STORAGE_BOTH) && | |
590 | coredump_size <= (off_t) arg_journal_size_max) { | |
591 | size_t sz; | |
fee80f69 | 592 | |
34c10968 | 593 | /* Store the coredump itself in the journal */ |
fee80f69 | 594 | |
34c10968 LP |
595 | r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); |
596 | if (r >= 0) { | |
597 | iovec[j].iov_base = coredump_data; | |
598 | iovec[j].iov_len = sz; | |
599 | j++; | |
ca0ceb6f | 600 | } |
fee80f69 LP |
601 | } |
602 | ||
f5e04665 LP |
603 | r = sd_journal_sendv(iovec, j); |
604 | if (r < 0) | |
872c8faa | 605 | log_error("Failed to log coredump: %s", strerror(-r)); |
f5e04665 LP |
606 | |
607 | finish: | |
f5e04665 LP |
608 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
609 | } |