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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
f5e04665 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2012 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
f5e04665 LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
f5e04665 | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
f5e04665 LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
21 | #include <errno.h> | |
803a3464 LP |
22 | #include <stdio.h> |
23 | #include <sys/prctl.h> | |
cacd6403 | 24 | #include <sys/xattr.h> |
4f5dd394 | 25 | #include <unistd.h> |
f5e04665 | 26 | |
349cc4a5 | 27 | #if HAVE_ELFUTILS |
3c171f0b LP |
28 | #include <dwarf.h> |
29 | #include <elfutils/libdwfl.h> | |
4d229b31 UTL |
30 | #endif |
31 | ||
73a99163 | 32 | #include "sd-daemon.h" |
f11943c5 LP |
33 | #include "sd-journal.h" |
34 | #include "sd-login.h" | |
73a99163 | 35 | #include "sd-messages.h" |
4f5dd394 LP |
36 | |
37 | #include "acl-util.h" | |
b5efdb8a | 38 | #include "alloc-util.h" |
430f0182 | 39 | #include "capability-util.h" |
ba1261bc | 40 | #include "cgroup-util.h" |
4f5dd394 | 41 | #include "compress.h" |
34c10968 LP |
42 | #include "conf-parser.h" |
43 | #include "copy.h" | |
f11943c5 | 44 | #include "coredump-vacuum.h" |
a0956174 | 45 | #include "dirent-util.h" |
4f5dd394 | 46 | #include "escape.h" |
3ffd4af2 | 47 | #include "fd-util.h" |
4f5dd394 | 48 | #include "fileio.h" |
f4f15635 | 49 | #include "fs-util.h" |
afc5dbf3 | 50 | #include "io-util.h" |
b18453ed | 51 | #include "journal-importer.h" |
4f5dd394 LP |
52 | #include "log.h" |
53 | #include "macro.h" | |
0c773903 | 54 | #include "missing.h" |
4f5dd394 | 55 | #include "mkdir.h" |
6bedfcbb | 56 | #include "parse-util.h" |
0b452006 | 57 | #include "process-util.h" |
d14bcb4e | 58 | #include "signal-util.h" |
3c171f0b | 59 | #include "socket-util.h" |
4f5dd394 LP |
60 | #include "special.h" |
61 | #include "stacktrace.h" | |
8b43440b | 62 | #include "string-table.h" |
07630cea | 63 | #include "string-util.h" |
4f5dd394 | 64 | #include "strv.h" |
b1d4f8e1 | 65 | #include "user-util.h" |
4f5dd394 | 66 | #include "util.h" |
34727273 | 67 | |
34c10968 | 68 | /* The maximum size up to which we process coredumps */ |
59f448cf | 69 | #define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) |
34c10968 | 70 | |
bdfd7b2c | 71 | /* The maximum size up to which we leave the coredump around on disk */ |
34c10968 LP |
72 | #define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX |
73 | ||
bdfd7b2c | 74 | /* The maximum size up to which we store the coredump in the journal */ |
34c10968 | 75 | #define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) |
f5e04665 | 76 | |
c4aa09b0 | 77 | /* Make sure to not make this larger than the maximum journal entry |
874bc134 ZJS |
78 | * size. See DATA_SIZE_MAX in journald-native.c. */ |
79 | assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); | |
f5e04665 LP |
80 | |
81 | enum { | |
ea5cc2a8 ZJS |
82 | /* We use this as array indexes for a couple of special fields we use for |
83 | * naming coredump files, and attaching xattrs, and for indexing argv[]. | |
84 | ||
85 | * Our pattern for man:systectl(1) kernel.core_pattern is such that the | |
86 | * kernel passes fields until CONTEXT_RLIMIT as arguments in argv[]. After | |
87 | * that it gets complicated: the kernel passes "comm" as one or more fields | |
88 | * starting at index CONTEXT_COMM (in other words, full "comm" is under index | |
89 | * CONTEXT_COMM when it does not contain spaces, which is the common | |
90 | * case). This mapping is not reversible, so we prefer to retrieve "comm" | |
91 | * from /proc. We only fall back to argv[CONTEXT_COMM...] when that fails. | |
92 | * | |
93 | * In the internal context[] array, fields before CONTEXT_COMM are the | |
94 | * strings from argv[], so they should not be freed. The strings at indices | |
95 | * CONTEXT_COMM and higher are allocated by us and should be freed at the | |
96 | * end. | |
97 | */ | |
3c171f0b LP |
98 | CONTEXT_PID, |
99 | CONTEXT_UID, | |
100 | CONTEXT_GID, | |
101 | CONTEXT_SIGNAL, | |
102 | CONTEXT_TIMESTAMP, | |
bdfd7b2c | 103 | CONTEXT_RLIMIT, |
3c171f0b LP |
104 | CONTEXT_COMM, |
105 | CONTEXT_EXE, | |
92e92d71 | 106 | CONTEXT_UNIT, |
3c171f0b | 107 | _CONTEXT_MAX |
f5e04665 LP |
108 | }; |
109 | ||
34c10968 LP |
110 | typedef enum CoredumpStorage { |
111 | COREDUMP_STORAGE_NONE, | |
112 | COREDUMP_STORAGE_EXTERNAL, | |
113 | COREDUMP_STORAGE_JOURNAL, | |
34c10968 LP |
114 | _COREDUMP_STORAGE_MAX, |
115 | _COREDUMP_STORAGE_INVALID = -1 | |
116 | } CoredumpStorage; | |
117 | ||
34c10968 LP |
118 | static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { |
119 | [COREDUMP_STORAGE_NONE] = "none", | |
120 | [COREDUMP_STORAGE_EXTERNAL] = "external", | |
121 | [COREDUMP_STORAGE_JOURNAL] = "journal", | |
34c10968 LP |
122 | }; |
123 | ||
124 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); | |
8c9571d0 | 125 | static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); |
34727273 ZJS |
126 | |
127 | static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
8c9571d0 | 128 | static bool arg_compress = true; |
59f448cf LP |
129 | static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; |
130 | static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; | |
6e2b4a69 | 131 | static uint64_t arg_journal_size_max = JOURNAL_SIZE_MAX; |
59f448cf LP |
132 | static uint64_t arg_keep_free = (uint64_t) -1; |
133 | static uint64_t arg_max_use = (uint64_t) -1; | |
34c10968 LP |
134 | |
135 | static int parse_config(void) { | |
34c10968 | 136 | static const ConfigTableItem items[] = { |
8c9571d0 LP |
137 | { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, |
138 | { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, | |
59f448cf LP |
139 | { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, |
140 | { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, | |
8c9571d0 | 141 | { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, |
59f448cf LP |
142 | { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, |
143 | { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, | |
34c10968 LP |
144 | {} |
145 | }; | |
146 | ||
43688c49 | 147 | return config_parse_many_nulstr(PKGSYSCONFDIR "/coredump.conf", |
da412854 YW |
148 | CONF_PATHS_NULSTR("systemd/coredump.conf.d"), |
149 | "Coredump\0", | |
150 | config_item_table_lookup, items, | |
bcde742e | 151 | CONFIG_PARSE_WARN, NULL); |
34c10968 LP |
152 | } |
153 | ||
73a99163 ZJS |
154 | static inline uint64_t storage_size_max(void) { |
155 | return arg_storage == COREDUMP_STORAGE_EXTERNAL ? arg_external_size_max : arg_journal_size_max; | |
156 | } | |
157 | ||
34c10968 LP |
158 | static int fix_acl(int fd, uid_t uid) { |
159 | ||
349cc4a5 | 160 | #if HAVE_ACL |
34c10968 LP |
161 | _cleanup_(acl_freep) acl_t acl = NULL; |
162 | acl_entry_t entry; | |
163 | acl_permset_t permset; | |
709f6e46 | 164 | int r; |
34c10968 | 165 | |
b59233e6 LP |
166 | assert(fd >= 0); |
167 | ||
34c10968 LP |
168 | if (uid <= SYSTEM_UID_MAX) |
169 | return 0; | |
170 | ||
171 | /* Make sure normal users can read (but not write or delete) | |
172 | * their own coredumps */ | |
173 | ||
174 | acl = acl_get_fd(fd); | |
4a62c710 MS |
175 | if (!acl) |
176 | return log_error_errno(errno, "Failed to get ACL: %m"); | |
34c10968 LP |
177 | |
178 | if (acl_create_entry(&acl, &entry) < 0 || | |
179 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
d710aaf7 ZJS |
180 | acl_set_qualifier(entry, &uid) < 0) |
181 | return log_error_errno(errno, "Failed to patch ACL: %m"); | |
34c10968 LP |
182 | |
183 | if (acl_get_permset(entry, &permset) < 0 || | |
709f6e46 MS |
184 | acl_add_perm(permset, ACL_READ) < 0) |
185 | return log_warning_errno(errno, "Failed to patch ACL: %m"); | |
186 | ||
187 | r = calc_acl_mask_if_needed(&acl); | |
188 | if (r < 0) | |
189 | return log_warning_errno(r, "Failed to patch ACL: %m"); | |
34c10968 | 190 | |
4a62c710 MS |
191 | if (acl_set_fd(fd, acl) < 0) |
192 | return log_error_errno(errno, "Failed to apply ACL: %m"); | |
34c10968 LP |
193 | #endif |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
3c171f0b | 198 | static int fix_xattr(int fd, const char *context[_CONTEXT_MAX]) { |
0cd77f97 | 199 | |
3c171f0b LP |
200 | static const char * const xattrs[_CONTEXT_MAX] = { |
201 | [CONTEXT_PID] = "user.coredump.pid", | |
202 | [CONTEXT_UID] = "user.coredump.uid", | |
203 | [CONTEXT_GID] = "user.coredump.gid", | |
204 | [CONTEXT_SIGNAL] = "user.coredump.signal", | |
205 | [CONTEXT_TIMESTAMP] = "user.coredump.timestamp", | |
6d337300 | 206 | [CONTEXT_RLIMIT] = "user.coredump.rlimit", |
3c171f0b LP |
207 | [CONTEXT_COMM] = "user.coredump.comm", |
208 | [CONTEXT_EXE] = "user.coredump.exe", | |
0cd77f97 LP |
209 | }; |
210 | ||
34c10968 | 211 | int r = 0; |
0cd77f97 | 212 | unsigned i; |
34c10968 | 213 | |
b59233e6 LP |
214 | assert(fd >= 0); |
215 | ||
1eef15b1 | 216 | /* Attach some metadata to coredumps via extended |
34c10968 LP |
217 | * attributes. Just because we can. */ |
218 | ||
3c171f0b | 219 | for (i = 0; i < _CONTEXT_MAX; i++) { |
1eef15b1 ZJS |
220 | int k; |
221 | ||
3c171f0b | 222 | if (isempty(context[i]) || !xattrs[i]) |
0cd77f97 | 223 | continue; |
34c10968 | 224 | |
3c171f0b | 225 | k = fsetxattr(fd, xattrs[i], context[i], strlen(context[i]), XATTR_CREATE); |
1eef15b1 | 226 | if (k < 0 && r == 0) |
34c10968 | 227 | r = -errno; |
0cd77f97 | 228 | } |
34c10968 LP |
229 | |
230 | return r; | |
231 | } | |
232 | ||
b0b21dce | 233 | #define filename_escape(s) xescape((s), "./ ") |
34c10968 | 234 | |
0c773903 EV |
235 | static inline const char *coredump_tmpfile_name(const char *s) { |
236 | return s ? s : "(unnamed temporary file)"; | |
237 | } | |
238 | ||
b59233e6 LP |
239 | static int fix_permissions( |
240 | int fd, | |
241 | const char *filename, | |
242 | const char *target, | |
3c171f0b | 243 | const char *context[_CONTEXT_MAX], |
b59233e6 LP |
244 | uid_t uid) { |
245 | ||
03532f0a LP |
246 | int r; |
247 | ||
b59233e6 | 248 | assert(fd >= 0); |
b59233e6 | 249 | assert(target); |
3c171f0b | 250 | assert(context); |
cfd652ed ZJS |
251 | |
252 | /* Ignore errors on these */ | |
3c171f0b LP |
253 | (void) fchmod(fd, 0640); |
254 | (void) fix_acl(fd, uid); | |
255 | (void) fix_xattr(fd, context); | |
cfd652ed | 256 | |
4a62c710 | 257 | if (fsync(fd) < 0) |
0c773903 | 258 | return log_error_errno(errno, "Failed to sync coredump %s: %m", coredump_tmpfile_name(filename)); |
cfd652ed | 259 | |
03532f0a LP |
260 | r = link_tmpfile(fd, filename, target); |
261 | if (r < 0) | |
262 | return log_error_errno(r, "Failed to move coredump %s into place: %m", target); | |
cfd652ed ZJS |
263 | |
264 | return 0; | |
265 | } | |
266 | ||
59f448cf | 267 | static int maybe_remove_external_coredump(const char *filename, uint64_t size) { |
cfd652ed | 268 | |
b59233e6 | 269 | /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ |
cfd652ed | 270 | |
fc6cec86 | 271 | if (arg_storage == COREDUMP_STORAGE_EXTERNAL && |
cfd652ed ZJS |
272 | size <= arg_external_size_max) |
273 | return 0; | |
274 | ||
275 | if (!filename) | |
276 | return 1; | |
277 | ||
4a62c710 MS |
278 | if (unlink(filename) < 0 && errno != ENOENT) |
279 | return log_error_errno(errno, "Failed to unlink %s: %m", filename); | |
cfd652ed ZJS |
280 | |
281 | return 1; | |
282 | } | |
283 | ||
3c171f0b | 284 | static int make_filename(const char *context[_CONTEXT_MAX], char **ret) { |
b59233e6 | 285 | _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; |
a7f7d1bd | 286 | sd_id128_t boot = {}; |
34c10968 LP |
287 | int r; |
288 | ||
3c171f0b | 289 | assert(context); |
34c10968 | 290 | |
3c171f0b | 291 | c = filename_escape(context[CONTEXT_COMM]); |
34c10968 | 292 | if (!c) |
b59233e6 | 293 | return -ENOMEM; |
34c10968 | 294 | |
3c171f0b | 295 | u = filename_escape(context[CONTEXT_UID]); |
0dc5d23c | 296 | if (!u) |
b59233e6 | 297 | return -ENOMEM; |
34c10968 LP |
298 | |
299 | r = sd_id128_get_boot(&boot); | |
b59233e6 | 300 | if (r < 0) |
34c10968 | 301 | return r; |
34c10968 | 302 | |
3c171f0b | 303 | p = filename_escape(context[CONTEXT_PID]); |
b59233e6 LP |
304 | if (!p) |
305 | return -ENOMEM; | |
306 | ||
3c171f0b | 307 | t = filename_escape(context[CONTEXT_TIMESTAMP]); |
b59233e6 LP |
308 | if (!t) |
309 | return -ENOMEM; | |
310 | ||
311 | if (asprintf(ret, | |
0dc5d23c | 312 | "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", |
34c10968 | 313 | c, |
0dc5d23c | 314 | u, |
34c10968 LP |
315 | SD_ID128_FORMAT_VAL(boot), |
316 | p, | |
b59233e6 LP |
317 | t) < 0) |
318 | return -ENOMEM; | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | static int save_external_coredump( | |
3c171f0b LP |
324 | const char *context[_CONTEXT_MAX], |
325 | int input_fd, | |
b59233e6 | 326 | char **ret_filename, |
5f3e0a74 HW |
327 | int *ret_node_fd, |
328 | int *ret_data_fd, | |
0cd4e913 | 329 | uint64_t *ret_size, |
cc4419ed | 330 | bool *ret_truncated) { |
b59233e6 LP |
331 | |
332 | _cleanup_free_ char *fn = NULL, *tmp = NULL; | |
333 | _cleanup_close_ int fd = -1; | |
bdfd7b2c | 334 | uint64_t rlimit, max_size; |
b59233e6 | 335 | struct stat st; |
3c171f0b | 336 | uid_t uid; |
b59233e6 LP |
337 | int r; |
338 | ||
3c171f0b | 339 | assert(context); |
b59233e6 | 340 | assert(ret_filename); |
5f3e0a74 HW |
341 | assert(ret_node_fd); |
342 | assert(ret_data_fd); | |
b59233e6 LP |
343 | assert(ret_size); |
344 | ||
3c171f0b LP |
345 | r = parse_uid(context[CONTEXT_UID], &uid); |
346 | if (r < 0) | |
347 | return log_error_errno(r, "Failed to parse UID: %m"); | |
348 | ||
bdfd7b2c LP |
349 | r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit); |
350 | if (r < 0) | |
351 | return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]); | |
6998b540 ZJS |
352 | if (rlimit < page_size()) { |
353 | /* Is coredumping disabled? Then don't bother saving/processing the coredump. | |
354 | * Anything below PAGE_SIZE cannot give a readable coredump (the kernel uses | |
355 | * ELF_EXEC_PAGESIZE which is not easily accessible, but is usually the same as PAGE_SIZE. */ | |
73a99163 ZJS |
356 | log_info("Resource limits disable core dumping for process %s (%s).", |
357 | context[CONTEXT_PID], context[CONTEXT_COMM]); | |
bdfd7b2c LP |
358 | return -EBADSLT; |
359 | } | |
360 | ||
361 | /* Never store more than the process configured, or than we actually shall keep or process */ | |
73a99163 | 362 | max_size = MIN(rlimit, MAX(arg_process_size_max, storage_size_max())); |
bdfd7b2c | 363 | |
3c171f0b | 364 | r = make_filename(context, &fn); |
23bbb0de MS |
365 | if (r < 0) |
366 | return log_error_errno(r, "Failed to determine coredump file name: %m"); | |
34c10968 | 367 | |
d2e54fae | 368 | mkdir_p_label("/var/lib/systemd/coredump", 0755); |
803a3464 | 369 | |
03532f0a | 370 | fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp); |
4a62c710 | 371 | if (fd < 0) |
03532f0a | 372 | return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn); |
803a3464 | 373 | |
1c876927 | 374 | r = copy_bytes(input_fd, fd, max_size, 0); |
73a99163 ZJS |
375 | if (r < 0) { |
376 | log_error_errno(r, "Cannot store coredump of %s (%s): %m", context[CONTEXT_PID], context[CONTEXT_COMM]); | |
93240d3a | 377 | goto fail; |
0cd4e913 | 378 | } |
cc4419ed ZJS |
379 | *ret_truncated = r == 1; |
380 | if (*ret_truncated) | |
73a99163 ZJS |
381 | log_struct(LOG_INFO, |
382 | LOG_MESSAGE("Core file was truncated to %zu bytes.", max_size), | |
383 | "SIZE_LIMIT=%zu", max_size, | |
2b044526 | 384 | "MESSAGE_ID=" SD_MESSAGE_TRUNCATED_CORE_STR, |
73a99163 | 385 | NULL); |
803a3464 | 386 | |
34c10968 | 387 | if (fstat(fd, &st) < 0) { |
73a99163 | 388 | log_error_errno(errno, "Failed to fstat core file %s: %m", coredump_tmpfile_name(tmp)); |
34c10968 LP |
389 | goto fail; |
390 | } | |
391 | ||
7849c2ac | 392 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { |
0c773903 | 393 | log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp)); |
b59233e6 | 394 | goto fail; |
7849c2ac TA |
395 | } |
396 | ||
349cc4a5 | 397 | #if HAVE_XZ || HAVE_LZ4 |
cfd652ed | 398 | /* If we will remove the coredump anyway, do not compress. */ |
6e9ef603 | 399 | if (arg_compress && !maybe_remove_external_coredump(NULL, st.st_size)) { |
cfd652ed | 400 | |
b59233e6 LP |
401 | _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; |
402 | _cleanup_close_ int fd_compressed = -1; | |
cfd652ed | 403 | |
d89c8fdf | 404 | fn_compressed = strappend(fn, COMPRESSED_EXT); |
b59233e6 | 405 | if (!fn_compressed) { |
d89c8fdf | 406 | log_oom(); |
cfd652ed ZJS |
407 | goto uncompressed; |
408 | } | |
409 | ||
03532f0a LP |
410 | fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed); |
411 | if (fd_compressed < 0) { | |
412 | log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed); | |
b59233e6 | 413 | goto uncompressed; |
03532f0a | 414 | } |
cfd652ed | 415 | |
d89c8fdf | 416 | r = compress_stream(fd, fd_compressed, -1); |
b59233e6 | 417 | if (r < 0) { |
0c773903 | 418 | log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed)); |
b59233e6 LP |
419 | goto fail_compressed; |
420 | } | |
421 | ||
3c171f0b | 422 | r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid); |
cfd652ed | 423 | if (r < 0) |
b59233e6 LP |
424 | goto fail_compressed; |
425 | ||
426 | /* OK, this worked, we can get rid of the uncompressed version now */ | |
0c773903 EV |
427 | if (tmp) |
428 | unlink_noerrno(tmp); | |
cfd652ed | 429 | |
59f448cf | 430 | *ret_filename = fn_compressed; /* compressed */ |
5f3e0a74 HW |
431 | *ret_node_fd = fd_compressed; /* compressed */ |
432 | *ret_data_fd = fd; /* uncompressed */ | |
59f448cf | 433 | *ret_size = (uint64_t) st.st_size; /* uncompressed */ |
cfd652ed | 434 | |
b59233e6 | 435 | fn_compressed = NULL; |
5f3e0a74 | 436 | fd = fd_compressed = -1; |
cfd652ed ZJS |
437 | |
438 | return 0; | |
439 | ||
b59233e6 | 440 | fail_compressed: |
0c773903 EV |
441 | if (tmp_compressed) |
442 | (void) unlink(tmp_compressed); | |
34c10968 | 443 | } |
cfd652ed ZJS |
444 | |
445 | uncompressed: | |
3b1a55e1 | 446 | #endif |
5f3e0a74 | 447 | |
3c171f0b | 448 | r = fix_permissions(fd, tmp, fn, context, uid); |
cfd652ed ZJS |
449 | if (r < 0) |
450 | goto fail; | |
34c10968 LP |
451 | |
452 | *ret_filename = fn; | |
5f3e0a74 HW |
453 | *ret_data_fd = fd; |
454 | *ret_node_fd = -1; | |
59f448cf | 455 | *ret_size = (uint64_t) st.st_size; |
34c10968 LP |
456 | |
457 | fn = NULL; | |
458 | fd = -1; | |
459 | ||
460 | return 0; | |
461 | ||
462 | fail: | |
0c773903 EV |
463 | if (tmp) |
464 | (void) unlink(tmp); | |
34c10968 LP |
465 | return r; |
466 | } | |
467 | ||
468 | static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { | |
469 | _cleanup_free_ char *field = NULL; | |
470 | ssize_t n; | |
471 | ||
8d4e028f | 472 | assert(fd >= 0); |
34c10968 LP |
473 | assert(ret); |
474 | assert(ret_size); | |
475 | ||
4a62c710 MS |
476 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
477 | return log_warning_errno(errno, "Failed to seek: %m"); | |
803a3464 | 478 | |
34c10968 LP |
479 | field = malloc(9 + size); |
480 | if (!field) { | |
cfd652ed | 481 | log_warning("Failed to allocate memory for coredump, coredump will not be stored."); |
34c10968 LP |
482 | return -ENOMEM; |
483 | } | |
484 | ||
485 | memcpy(field, "COREDUMP=", 9); | |
486 | ||
487 | n = read(fd, field + 9, size); | |
23bbb0de MS |
488 | if (n < 0) |
489 | return log_error_errno((int) n, "Failed to read core data: %m"); | |
34c10968 LP |
490 | if ((size_t) n < size) { |
491 | log_error("Core data too short."); | |
492 | return -EIO; | |
493 | } | |
494 | ||
495 | *ret = field; | |
496 | *ret_size = size + 9; | |
497 | ||
498 | field = NULL; | |
499 | ||
500 | return 0; | |
501 | } | |
803a3464 | 502 | |
3f132692 JF |
503 | /* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: |
504 | * 0:/dev/pts/23 | |
505 | * pos: 0 | |
506 | * flags: 0100002 | |
507 | * | |
508 | * 1:/dev/pts/23 | |
509 | * pos: 0 | |
510 | * flags: 0100002 | |
511 | * | |
512 | * 2:/dev/pts/23 | |
513 | * pos: 0 | |
514 | * flags: 0100002 | |
515 | * EOF | |
516 | */ | |
517 | static int compose_open_fds(pid_t pid, char **open_fds) { | |
4d84bc2f LP |
518 | _cleanup_closedir_ DIR *proc_fd_dir = NULL; |
519 | _cleanup_close_ int proc_fdinfo_fd = -1; | |
520 | _cleanup_free_ char *buffer = NULL; | |
3f132692 | 521 | _cleanup_fclose_ FILE *stream = NULL; |
59059b4a | 522 | const char *fddelim = "", *path; |
3f132692 | 523 | struct dirent *dent = NULL; |
4d84bc2f | 524 | size_t size = 0; |
3f132692 JF |
525 | int r = 0; |
526 | ||
527 | assert(pid >= 0); | |
528 | assert(open_fds != NULL); | |
529 | ||
59059b4a | 530 | path = procfs_file_alloca(pid, "fd"); |
3f132692 | 531 | proc_fd_dir = opendir(path); |
59059b4a ZJS |
532 | if (!proc_fd_dir) |
533 | return -errno; | |
3f132692 | 534 | |
4d84bc2f | 535 | proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); |
59059b4a ZJS |
536 | if (proc_fdinfo_fd < 0) |
537 | return -errno; | |
3f132692 | 538 | |
4d84bc2f | 539 | stream = open_memstream(&buffer, &size); |
3f132692 JF |
540 | if (!stream) |
541 | return -ENOMEM; | |
542 | ||
4d84bc2f | 543 | FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { |
3f132692 | 544 | _cleanup_fclose_ FILE *fdinfo = NULL; |
4d84bc2f | 545 | _cleanup_free_ char *fdname = NULL; |
59059b4a | 546 | char line[LINE_MAX]; |
4d84bc2f | 547 | int fd; |
3f132692 | 548 | |
59059b4a | 549 | r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); |
3f132692 JF |
550 | if (r < 0) |
551 | return r; | |
552 | ||
553 | fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); | |
554 | fddelim = "\n"; | |
555 | ||
556 | /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ | |
59059b4a ZJS |
557 | fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); |
558 | if (fd < 0) | |
3f132692 JF |
559 | continue; |
560 | ||
59059b4a ZJS |
561 | fdinfo = fdopen(fd, "re"); |
562 | if (fdinfo == NULL) { | |
563 | close(fd); | |
3f132692 | 564 | continue; |
59059b4a | 565 | } |
3f132692 | 566 | |
4d84bc2f | 567 | FOREACH_LINE(line, fdinfo, break) { |
4b61c875 | 568 | fputs_unlocked(line, stream); |
4d84bc2f LP |
569 | if (!endswith(line, "\n")) |
570 | fputc('\n', stream); | |
571 | } | |
3f132692 JF |
572 | } |
573 | ||
4d84bc2f | 574 | errno = 0; |
74ca738f | 575 | stream = safe_fclose(stream); |
4d84bc2f | 576 | |
b3267152 | 577 | if (errno > 0) |
4d84bc2f LP |
578 | return -errno; |
579 | ||
580 | *open_fds = buffer; | |
581 | buffer = NULL; | |
582 | ||
3f132692 JF |
583 | return 0; |
584 | } | |
585 | ||
7ed03ce6 JF |
586 | static int get_process_ns(pid_t pid, const char *namespace, ino_t *ns) { |
587 | const char *p; | |
588 | struct stat stbuf; | |
589 | _cleanup_close_ int proc_ns_dir_fd; | |
590 | ||
591 | p = procfs_file_alloca(pid, "ns"); | |
592 | ||
593 | proc_ns_dir_fd = open(p, O_DIRECTORY | O_CLOEXEC | O_RDONLY); | |
594 | if (proc_ns_dir_fd < 0) | |
595 | return -errno; | |
596 | ||
597 | if (fstatat(proc_ns_dir_fd, namespace, &stbuf, /* flags */0) < 0) | |
598 | return -errno; | |
599 | ||
600 | *ns = stbuf.st_ino; | |
601 | return 0; | |
602 | } | |
603 | ||
604 | static int get_mount_namespace_leader(pid_t pid, pid_t *container_pid) { | |
605 | pid_t cpid = pid, ppid = 0; | |
606 | ino_t proc_mntns; | |
607 | int r = 0; | |
608 | ||
609 | r = get_process_ns(pid, "mnt", &proc_mntns); | |
610 | if (r < 0) | |
611 | return r; | |
612 | ||
aa7530d6 | 613 | for (;;) { |
7ed03ce6 JF |
614 | ino_t parent_mntns; |
615 | ||
616 | r = get_process_ppid(cpid, &ppid); | |
617 | if (r < 0) | |
618 | return r; | |
619 | ||
620 | r = get_process_ns(ppid, "mnt", &parent_mntns); | |
621 | if (r < 0) | |
622 | return r; | |
623 | ||
624 | if (proc_mntns != parent_mntns) | |
625 | break; | |
626 | ||
627 | if (ppid == 1) | |
628 | return -ENOENT; | |
629 | ||
630 | cpid = ppid; | |
631 | } | |
632 | ||
633 | *container_pid = ppid; | |
634 | return 0; | |
635 | } | |
636 | ||
637 | /* Returns 1 if the parent was found. | |
638 | * Returns 0 if there is not a process we can call the pid's | |
639 | * container parent (the pid's process isn't 'containerized'). | |
640 | * Returns a negative number on errors. | |
641 | */ | |
642 | static int get_process_container_parent_cmdline(pid_t pid, char** cmdline) { | |
643 | int r = 0; | |
644 | pid_t container_pid; | |
645 | const char *proc_root_path; | |
646 | struct stat root_stat, proc_root_stat; | |
647 | ||
648 | /* To compare inodes of / and /proc/[pid]/root */ | |
649 | if (stat("/", &root_stat) < 0) | |
650 | return -errno; | |
651 | ||
652 | proc_root_path = procfs_file_alloca(pid, "root"); | |
653 | if (stat(proc_root_path, &proc_root_stat) < 0) | |
654 | return -errno; | |
655 | ||
656 | /* The process uses system root. */ | |
657 | if (proc_root_stat.st_ino == root_stat.st_ino) { | |
658 | *cmdline = NULL; | |
659 | return 0; | |
660 | } | |
661 | ||
662 | r = get_mount_namespace_leader(pid, &container_pid); | |
663 | if (r < 0) | |
664 | return r; | |
665 | ||
d3cba4ea EV |
666 | r = get_process_cmdline(container_pid, 0, false, cmdline); |
667 | if (r < 0) | |
668 | return r; | |
669 | ||
670 | return 1; | |
7ed03ce6 JF |
671 | } |
672 | ||
3c171f0b LP |
673 | static int change_uid_gid(const char *context[]) { |
674 | uid_t uid; | |
675 | gid_t gid; | |
676 | int r; | |
34c10968 | 677 | |
3c171f0b LP |
678 | r = parse_uid(context[CONTEXT_UID], &uid); |
679 | if (r < 0) | |
680 | return r; | |
8c8549db | 681 | |
888e378d LP |
682 | if (uid <= SYSTEM_UID_MAX) { |
683 | const char *user = "systemd-coredump"; | |
684 | ||
685 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
686 | if (r < 0) { | |
687 | log_warning_errno(r, "Cannot resolve %s user. Proceeding to dump core as root: %m", user); | |
688 | uid = gid = 0; | |
689 | } | |
690 | } else { | |
691 | r = parse_gid(context[CONTEXT_GID], &gid); | |
692 | if (r < 0) | |
693 | return r; | |
694 | } | |
3c171f0b LP |
695 | |
696 | return drop_privileges(uid, gid, 0); | |
697 | } | |
8c8549db | 698 | |
b8cda92d LP |
699 | static bool is_journald_crash(const char *context[_CONTEXT_MAX]) { |
700 | assert(context); | |
701 | ||
702 | return streq_ptr(context[CONTEXT_UNIT], SPECIAL_JOURNALD_SERVICE); | |
703 | } | |
704 | ||
705 | static bool is_pid1_crash(const char *context[_CONTEXT_MAX]) { | |
706 | assert(context); | |
707 | ||
708 | return streq_ptr(context[CONTEXT_UNIT], SPECIAL_INIT_SCOPE) || | |
709 | streq_ptr(context[CONTEXT_PID], "1"); | |
710 | } | |
711 | ||
0cd4e913 ZJS |
712 | #define SUBMIT_COREDUMP_FIELDS 4 |
713 | ||
3c171f0b LP |
714 | static int submit_coredump( |
715 | const char *context[_CONTEXT_MAX], | |
716 | struct iovec *iovec, | |
717 | size_t n_iovec_allocated, | |
718 | size_t n_iovec, | |
719 | int input_fd) { | |
34c10968 | 720 | |
5f3e0a74 | 721 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
3c171f0b | 722 | _cleanup_free_ char *core_message = NULL, *filename = NULL, *coredump_data = NULL; |
a5ca3649 | 723 | uint64_t coredump_size = UINT64_MAX; |
92e92d71 | 724 | bool truncated = false, journald_crash; |
3c171f0b | 725 | int r; |
f5e04665 | 726 | |
3c171f0b LP |
727 | assert(context); |
728 | assert(iovec); | |
0cd4e913 | 729 | assert(n_iovec_allocated >= n_iovec + SUBMIT_COREDUMP_FIELDS); |
3c171f0b | 730 | assert(input_fd >= 0); |
f5e04665 | 731 | |
b8cda92d | 732 | journald_crash = is_journald_crash(context); |
92e92d71 | 733 | |
3c171f0b LP |
734 | /* Vacuum before we write anything again */ |
735 | (void) coredump_vacuum(-1, arg_keep_free, arg_max_use); | |
803a3464 | 736 | |
3c171f0b | 737 | /* Always stream the coredump to disk, if that's possible */ |
0cd4e913 ZJS |
738 | r = save_external_coredump(context, input_fd, |
739 | &filename, &coredump_node_fd, &coredump_fd, &coredump_size, &truncated); | |
3c171f0b LP |
740 | if (r < 0) |
741 | /* Skip whole core dumping part */ | |
742 | goto log; | |
743 | ||
744 | /* If we don't want to keep the coredump on disk, remove it now, as later on we will lack the privileges for | |
745 | * it. However, we keep the fd to it, so that we can still process it and log it. */ | |
746 | r = maybe_remove_external_coredump(filename, coredump_size); | |
747 | if (r < 0) | |
748 | return r; | |
749 | if (r == 0) { | |
750 | const char *coredump_filename; | |
751 | ||
752 | coredump_filename = strjoina("COREDUMP_FILENAME=", filename); | |
e6a7ec4b | 753 | iovec[n_iovec++] = IOVEC_MAKE_STRING(coredump_filename); |
6e9ef603 | 754 | } else if (arg_storage == COREDUMP_STORAGE_EXTERNAL) |
5206a724 | 755 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 756 | coredump_size, arg_external_size_max); |
f5e04665 | 757 | |
3c171f0b LP |
758 | /* Vacuum again, but exclude the coredump we just created */ |
759 | (void) coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); | |
8c9571d0 | 760 | |
3c171f0b LP |
761 | /* Now, let's drop privileges to become the user who owns the segfaulted process and allocate the coredump |
762 | * memory under the user's uid. This also ensures that the credentials journald will see are the ones of the | |
763 | * coredumping user, thus making sure the user gets access to the core dump. Let's also get rid of all | |
764 | * capabilities, if we run as root, we won't need them anymore. */ | |
765 | r = change_uid_gid(context); | |
766 | if (r < 0) | |
767 | return log_error_errno(r, "Failed to drop privileges: %m"); | |
34c10968 | 768 | |
349cc4a5 | 769 | #if HAVE_ELFUTILS |
3c171f0b LP |
770 | /* Try to get a strack trace if we can */ |
771 | if (coredump_size <= arg_process_size_max) { | |
772 | _cleanup_free_ char *stacktrace = NULL; | |
773 | ||
774 | r = coredump_make_stack_trace(coredump_fd, context[CONTEXT_EXE], &stacktrace); | |
775 | if (r >= 0) | |
605405c6 ZJS |
776 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
777 | " (", context[CONTEXT_COMM], ") of user ", | |
92e92d71 ZJS |
778 | context[CONTEXT_UID], " dumped core.", |
779 | journald_crash ? "\nCoredump diverted to " : "", | |
780 | journald_crash ? filename : "", | |
781 | "\n\n", stacktrace); | |
3c171f0b LP |
782 | else if (r == -EINVAL) |
783 | log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); | |
784 | else | |
785 | log_warning_errno(r, "Failed to generate stack trace: %m"); | |
6e9ef603 | 786 | } else |
5206a724 | 787 | log_debug("Not generating stack trace: core size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 788 | coredump_size, arg_process_size_max); |
803a3464 | 789 | |
3c171f0b LP |
790 | if (!core_message) |
791 | #endif | |
792 | log: | |
92e92d71 ZJS |
793 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
794 | " (", context[CONTEXT_COMM], ") of user ", | |
795 | context[CONTEXT_UID], " dumped core.", | |
796 | journald_crash ? "\nCoredump diverted to " : NULL, | |
797 | journald_crash ? filename : NULL); | |
798 | if (!core_message) | |
799 | return log_oom(); | |
800 | ||
801 | if (journald_crash) { | |
802 | /* We cannot log to the journal, so just print the MESSAGE. | |
803 | * The target was set previously to something safe. */ | |
ae2173d6 | 804 | log_dispatch(LOG_ERR, 0, core_message); |
92e92d71 ZJS |
805 | return 0; |
806 | } | |
807 | ||
e6a7ec4b | 808 | iovec[n_iovec++] = IOVEC_MAKE_STRING(core_message); |
3c171f0b | 809 | |
0cd4e913 | 810 | if (truncated) |
e6a7ec4b | 811 | iovec[n_iovec++] = IOVEC_MAKE_STRING("COREDUMP_TRUNCATED=1"); |
0cd4e913 | 812 | |
3c171f0b | 813 | /* Optionally store the entire coredump in the journal */ |
6e9ef603 ZJS |
814 | if (arg_storage == COREDUMP_STORAGE_JOURNAL) { |
815 | if (coredump_size <= arg_journal_size_max) { | |
816 | size_t sz = 0; | |
817 | ||
818 | /* Store the coredump itself in the journal */ | |
819 | ||
820 | r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); | |
e6a7ec4b LP |
821 | if (r >= 0) |
822 | iovec[n_iovec++] = IOVEC_MAKE(coredump_data, sz); | |
823 | else | |
6e9ef603 ZJS |
824 | log_warning_errno(r, "Failed to attach the core to the journal entry: %m"); |
825 | } else | |
5206a724 | 826 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 827 | coredump_size, arg_journal_size_max); |
f5e04665 LP |
828 | } |
829 | ||
3c171f0b LP |
830 | assert(n_iovec <= n_iovec_allocated); |
831 | ||
832 | r = sd_journal_sendv(iovec, n_iovec); | |
833 | if (r < 0) | |
834 | return log_error_errno(r, "Failed to log coredump: %m"); | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
ea5cc2a8 | 839 | static void map_context_fields(const struct iovec *iovec, const char* context[]) { |
3c171f0b | 840 | |
92e92d71 | 841 | static const char * const context_field_names[] = { |
3c171f0b LP |
842 | [CONTEXT_PID] = "COREDUMP_PID=", |
843 | [CONTEXT_UID] = "COREDUMP_UID=", | |
844 | [CONTEXT_GID] = "COREDUMP_GID=", | |
845 | [CONTEXT_SIGNAL] = "COREDUMP_SIGNAL=", | |
846 | [CONTEXT_TIMESTAMP] = "COREDUMP_TIMESTAMP=", | |
92e92d71 | 847 | [CONTEXT_RLIMIT] = "COREDUMP_RLIMIT=", |
3c171f0b LP |
848 | [CONTEXT_COMM] = "COREDUMP_COMM=", |
849 | [CONTEXT_EXE] = "COREDUMP_EXE=", | |
850 | }; | |
851 | ||
852 | unsigned i; | |
853 | ||
854 | assert(iovec); | |
855 | assert(context); | |
856 | ||
92e92d71 | 857 | for (i = 0; i < ELEMENTSOF(context_field_names); i++) { |
3c171f0b LP |
858 | size_t l; |
859 | ||
92e92d71 ZJS |
860 | if (!context_field_names[i]) |
861 | continue; | |
862 | ||
3c171f0b LP |
863 | l = strlen(context_field_names[i]); |
864 | if (iovec->iov_len < l) | |
865 | continue; | |
866 | ||
867 | if (memcmp(iovec->iov_base, context_field_names[i], l) != 0) | |
868 | continue; | |
869 | ||
870 | /* Note that these strings are NUL terminated, because we made sure that a trailing NUL byte is in the | |
871 | * buffer, though not included in the iov_len count. (see below) */ | |
872 | context[i] = (char*) iovec->iov_base + l; | |
873 | break; | |
874 | } | |
875 | } | |
876 | ||
877 | static int process_socket(int fd) { | |
878 | _cleanup_close_ int coredump_fd = -1; | |
879 | struct iovec *iovec = NULL; | |
80002f66 | 880 | size_t n_iovec = 0, n_allocated = 0, i, k; |
3c171f0b LP |
881 | const char *context[_CONTEXT_MAX] = {}; |
882 | int r; | |
883 | ||
884 | assert(fd >= 0); | |
885 | ||
886 | log_set_target(LOG_TARGET_AUTO); | |
887 | log_parse_environment(); | |
888 | log_open(); | |
889 | ||
988e89ee ZJS |
890 | log_debug("Processing coredump received on stdin..."); |
891 | ||
3c171f0b LP |
892 | for (;;) { |
893 | union { | |
894 | struct cmsghdr cmsghdr; | |
895 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
896 | } control = {}; | |
897 | struct msghdr mh = { | |
898 | .msg_control = &control, | |
899 | .msg_controllen = sizeof(control), | |
900 | .msg_iovlen = 1, | |
901 | }; | |
902 | ssize_t n; | |
fe1ef0f8 | 903 | ssize_t l; |
3c171f0b | 904 | |
0cd4e913 | 905 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + SUBMIT_COREDUMP_FIELDS)) { |
3c171f0b LP |
906 | r = log_oom(); |
907 | goto finish; | |
908 | } | |
909 | ||
fe1ef0f8 EV |
910 | l = next_datagram_size_fd(fd); |
911 | if (l < 0) { | |
912 | r = log_error_errno(l, "Failed to determine datagram size to read: %m"); | |
3c171f0b LP |
913 | goto finish; |
914 | } | |
915 | ||
916 | assert(l >= 0); | |
917 | ||
918 | iovec[n_iovec].iov_len = l; | |
919 | iovec[n_iovec].iov_base = malloc(l + 1); | |
3c171f0b LP |
920 | if (!iovec[n_iovec].iov_base) { |
921 | r = log_oom(); | |
922 | goto finish; | |
923 | } | |
924 | ||
925 | mh.msg_iov = iovec + n_iovec; | |
926 | ||
927 | n = recvmsg(fd, &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC); | |
928 | if (n < 0) { | |
929 | free(iovec[n_iovec].iov_base); | |
930 | r = log_error_errno(errno, "Failed to receive datagram: %m"); | |
931 | goto finish; | |
932 | } | |
933 | ||
934 | if (n == 0) { | |
935 | struct cmsghdr *cmsg, *found = NULL; | |
936 | /* The final zero-length datagram carries the file descriptor and tells us that we're done. */ | |
937 | ||
938 | free(iovec[n_iovec].iov_base); | |
939 | ||
940 | CMSG_FOREACH(cmsg, &mh) { | |
941 | if (cmsg->cmsg_level == SOL_SOCKET && | |
942 | cmsg->cmsg_type == SCM_RIGHTS && | |
943 | cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
944 | assert(!found); | |
945 | found = cmsg; | |
946 | } | |
947 | } | |
948 | ||
949 | if (!found) { | |
950 | log_error("Coredump file descriptor missing."); | |
951 | r = -EBADMSG; | |
952 | goto finish; | |
953 | } | |
954 | ||
955 | assert(coredump_fd < 0); | |
956 | coredump_fd = *(int*) CMSG_DATA(found); | |
957 | break; | |
958 | } | |
959 | ||
960 | /* Add trailing NUL byte, in case these are strings */ | |
961 | ((char*) iovec[n_iovec].iov_base)[n] = 0; | |
962 | iovec[n_iovec].iov_len = (size_t) n; | |
963 | ||
964 | cmsg_close_all(&mh); | |
965 | map_context_fields(iovec + n_iovec, context); | |
966 | n_iovec++; | |
967 | } | |
968 | ||
0cd4e913 | 969 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + SUBMIT_COREDUMP_FIELDS)) { |
3c171f0b | 970 | r = log_oom(); |
34c10968 LP |
971 | goto finish; |
972 | } | |
973 | ||
61233823 | 974 | /* Make sure we got all data we really need */ |
3c171f0b LP |
975 | assert(context[CONTEXT_PID]); |
976 | assert(context[CONTEXT_UID]); | |
977 | assert(context[CONTEXT_GID]); | |
978 | assert(context[CONTEXT_SIGNAL]); | |
979 | assert(context[CONTEXT_TIMESTAMP]); | |
bdfd7b2c | 980 | assert(context[CONTEXT_RLIMIT]); |
3c171f0b LP |
981 | assert(context[CONTEXT_COMM]); |
982 | assert(coredump_fd >= 0); | |
983 | ||
80002f66 LP |
984 | /* Small quirk: the journal fields contain the timestamp padded with six zeroes, so that the kernel-supplied 1s |
985 | * granularity timestamps becomes 1µs granularity, i.e. the granularity systemd usually operates in. Since we | |
986 | * are reconstructing the original kernel context, we chop this off again, here. */ | |
987 | k = strlen(context[CONTEXT_TIMESTAMP]); | |
988 | if (k > 6) | |
989 | context[CONTEXT_TIMESTAMP] = strndupa(context[CONTEXT_TIMESTAMP], k - 6); | |
990 | ||
5b45a160 | 991 | r = submit_coredump(context, iovec, n_allocated, n_iovec, coredump_fd); |
3c171f0b LP |
992 | |
993 | finish: | |
994 | for (i = 0; i < n_iovec; i++) | |
995 | free(iovec[i].iov_base); | |
996 | free(iovec); | |
997 | ||
998 | return r; | |
999 | } | |
1000 | ||
1001 | static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd) { | |
1002 | ||
1003 | static const union sockaddr_union sa = { | |
1004 | .un.sun_family = AF_UNIX, | |
1005 | .un.sun_path = "/run/systemd/coredump", | |
1006 | }; | |
1007 | _cleanup_close_ int fd = -1; | |
1008 | size_t i; | |
1009 | int r; | |
1010 | ||
1011 | assert(iovec || n_iovec <= 0); | |
1012 | assert(input_fd >= 0); | |
1013 | ||
1014 | fd = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0); | |
1015 | if (fd < 0) | |
1016 | return log_error_errno(errno, "Failed to create coredump socket: %m"); | |
1017 | ||
fc2fffe7 | 1018 | if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) |
3c171f0b LP |
1019 | return log_error_errno(errno, "Failed to connect to coredump service: %m"); |
1020 | ||
1021 | for (i = 0; i < n_iovec; i++) { | |
fec603eb LP |
1022 | struct msghdr mh = { |
1023 | .msg_iov = (struct iovec*) iovec + i, | |
1024 | .msg_iovlen = 1, | |
1025 | }; | |
1026 | struct iovec copy[2]; | |
1027 | ||
1028 | for (;;) { | |
1029 | if (sendmsg(fd, &mh, MSG_NOSIGNAL) >= 0) | |
1030 | break; | |
1031 | ||
1032 | if (errno == EMSGSIZE && mh.msg_iov[0].iov_len > 0) { | |
1033 | /* This field didn't fit? That's a pity. Given that this is just metadata, | |
1034 | * let's truncate the field at half, and try again. We append three dots, in | |
1035 | * order to show that this is truncated. */ | |
1036 | ||
1037 | if (mh.msg_iov != copy) { | |
1038 | /* We don't want to modify the caller's iovec, hence let's create our | |
1039 | * own array, consisting of two new iovecs, where the first is a | |
1040 | * (truncated) copy of what we want to send, and the second one | |
1041 | * contains the trailing dots. */ | |
1042 | copy[0] = iovec[i]; | |
1043 | copy[1] = (struct iovec) { | |
1044 | .iov_base = (char[]) { '.', '.', '.' }, | |
1045 | .iov_len = 3, | |
1046 | }; | |
1047 | ||
1048 | mh.msg_iov = copy; | |
1049 | mh.msg_iovlen = 2; | |
1050 | } | |
1051 | ||
1052 | copy[0].iov_len /= 2; /* halve it, and try again */ | |
1053 | continue; | |
1054 | } | |
3c171f0b | 1055 | |
3c171f0b | 1056 | return log_error_errno(errno, "Failed to send coredump datagram: %m"); |
fec603eb | 1057 | } |
1eef15b1 ZJS |
1058 | } |
1059 | ||
3c171f0b LP |
1060 | r = send_one_fd(fd, input_fd, 0); |
1061 | if (r < 0) | |
1062 | return log_error_errno(r, "Failed to send coredump fd: %m"); | |
1eef15b1 | 1063 | |
3c171f0b LP |
1064 | return 0; |
1065 | } | |
1eef15b1 | 1066 | |
9aa82023 ZJS |
1067 | static char* set_iovec_field(struct iovec iovec[27], size_t *n_iovec, const char *field, const char *value) { |
1068 | char *x; | |
3c171f0b | 1069 | |
9aa82023 ZJS |
1070 | x = strappend(field, value); |
1071 | if (x) | |
e6a7ec4b | 1072 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(x); |
9aa82023 ZJS |
1073 | return x; |
1074 | } | |
3c171f0b | 1075 | |
9aa82023 ZJS |
1076 | static char* set_iovec_field_free(struct iovec iovec[27], size_t *n_iovec, const char *field, char *value) { |
1077 | char *x; | |
1078 | ||
1079 | x = set_iovec_field(iovec, n_iovec, field, value); | |
1080 | free(value); | |
1081 | return x; | |
1082 | } | |
1083 | ||
92e92d71 | 1084 | static int gather_pid_metadata( |
ea5cc2a8 | 1085 | char* context[_CONTEXT_MAX], |
9aa82023 | 1086 | char **comm_fallback, |
5b45a160 | 1087 | struct iovec *iovec, size_t *n_iovec) { |
d14bcb4e LP |
1088 | |
1089 | /* We need 26 empty slots in iovec! | |
1090 | * | |
1091 | * Note that if we fail on oom later on, we do not roll-back changes to the iovec structure. (It remains valid, | |
1092 | * with the first n_iovec fields initialized.) */ | |
3c171f0b | 1093 | |
3c171f0b | 1094 | uid_t owner_uid; |
3c171f0b LP |
1095 | pid_t pid; |
1096 | char *t; | |
9aa82023 | 1097 | const char *p; |
d14bcb4e | 1098 | int r, signo; |
3c171f0b | 1099 | |
9aa82023 | 1100 | r = parse_pid(context[CONTEXT_PID], &pid); |
3c171f0b | 1101 | if (r < 0) |
988e89ee | 1102 | return log_error_errno(r, "Failed to parse PID \"%s\": %m", context[CONTEXT_PID]); |
3c171f0b | 1103 | |
ea5cc2a8 | 1104 | r = get_process_comm(pid, &context[CONTEXT_COMM]); |
3c171f0b LP |
1105 | if (r < 0) { |
1106 | log_warning_errno(r, "Failed to get COMM, falling back to the command line: %m"); | |
ea5cc2a8 ZJS |
1107 | context[CONTEXT_COMM] = strv_join(comm_fallback, " "); |
1108 | if (!context[CONTEXT_COMM]) | |
3c171f0b LP |
1109 | return log_oom(); |
1110 | } | |
1111 | ||
ea5cc2a8 | 1112 | r = get_process_exe(pid, &context[CONTEXT_EXE]); |
3c171f0b LP |
1113 | if (r < 0) |
1114 | log_warning_errno(r, "Failed to get EXE, ignoring: %m"); | |
1115 | ||
92e92d71 | 1116 | if (cg_pid_get_unit(pid, &context[CONTEXT_UNIT]) >= 0) { |
b8cda92d | 1117 | if (!is_journald_crash((const char**) context)) { |
92e92d71 ZJS |
1118 | /* OK, now we know it's not the journal, hence we can make use of it now. */ |
1119 | log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); | |
1120 | log_open(); | |
1121 | } | |
3c171f0b | 1122 | |
c8091d92 | 1123 | /* If this is PID 1 disable coredump collection, we'll unlikely be able to process it later on. */ |
b8cda92d | 1124 | if (is_pid1_crash((const char**) context)) { |
c8091d92 LP |
1125 | log_notice("Due to PID 1 having crashed coredump collection will now be turned off."); |
1126 | (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); | |
1127 | } | |
1128 | ||
92e92d71 | 1129 | set_iovec_field(iovec, n_iovec, "COREDUMP_UNIT=", context[CONTEXT_UNIT]); |
8c8549db | 1130 | } |
803a3464 | 1131 | |
9aa82023 ZJS |
1132 | if (cg_pid_get_user_unit(pid, &t) >= 0) |
1133 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_USER_UNIT=", t); | |
3c171f0b | 1134 | |
9aa82023 ZJS |
1135 | /* The next few are mandatory */ |
1136 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_PID=", context[CONTEXT_PID])) | |
1137 | return log_oom(); | |
3c171f0b | 1138 | |
9aa82023 ZJS |
1139 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_UID=", context[CONTEXT_UID])) |
1140 | return log_oom(); | |
f5e04665 | 1141 | |
9aa82023 ZJS |
1142 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_GID=", context[CONTEXT_GID])) |
1143 | return log_oom(); | |
f5e04665 | 1144 | |
9aa82023 ZJS |
1145 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL])) |
1146 | return log_oom(); | |
f5e04665 | 1147 | |
9aa82023 ZJS |
1148 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT])) |
1149 | return log_oom(); | |
f5e04665 | 1150 | |
ea5cc2a8 | 1151 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_COMM=", context[CONTEXT_COMM])) |
9aa82023 | 1152 | return log_oom(); |
bdfd7b2c | 1153 | |
ea5cc2a8 ZJS |
1154 | if (context[CONTEXT_EXE] && |
1155 | !set_iovec_field(iovec, n_iovec, "COREDUMP_EXE=", context[CONTEXT_EXE])) | |
9aa82023 | 1156 | return log_oom(); |
f5e04665 | 1157 | |
9aa82023 ZJS |
1158 | if (sd_pid_get_session(pid, &t) >= 0) |
1159 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SESSION=", t); | |
f5e04665 | 1160 | |
a035f819 | 1161 | if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { |
9aa82023 | 1162 | r = asprintf(&t, "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); |
7de80bfe | 1163 | if (r > 0) |
e6a7ec4b | 1164 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); |
f5e04665 LP |
1165 | } |
1166 | ||
9aa82023 ZJS |
1167 | if (sd_pid_get_slice(pid, &t) >= 0) |
1168 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SLICE=", t); | |
f5e04665 | 1169 | |
9aa82023 ZJS |
1170 | if (get_process_cmdline(pid, 0, false, &t) >= 0) |
1171 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CMDLINE=", t); | |
a035f819 | 1172 | |
9aa82023 ZJS |
1173 | if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) |
1174 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CGROUP=", t); | |
a035f819 | 1175 | |
9aa82023 ZJS |
1176 | if (compose_open_fds(pid, &t) >= 0) |
1177 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_OPEN_FDS=", t); | |
3f132692 JF |
1178 | |
1179 | p = procfs_file_alloca(pid, "status"); | |
9aa82023 ZJS |
1180 | if (read_full_file(p, &t, NULL) >= 0) |
1181 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_STATUS=", t); | |
3f132692 JF |
1182 | |
1183 | p = procfs_file_alloca(pid, "maps"); | |
9aa82023 ZJS |
1184 | if (read_full_file(p, &t, NULL) >= 0) |
1185 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MAPS=", t); | |
3f132692 JF |
1186 | |
1187 | p = procfs_file_alloca(pid, "limits"); | |
9aa82023 ZJS |
1188 | if (read_full_file(p, &t, NULL) >= 0) |
1189 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_LIMITS=", t); | |
3f132692 JF |
1190 | |
1191 | p = procfs_file_alloca(pid, "cgroup"); | |
9aa82023 ZJS |
1192 | if (read_full_file(p, &t, NULL) >=0) |
1193 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_CGROUP=", t); | |
3f132692 | 1194 | |
d7032b1f | 1195 | p = procfs_file_alloca(pid, "mountinfo"); |
9aa82023 ZJS |
1196 | if (read_full_file(p, &t, NULL) >=0) |
1197 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MOUNTINFO=", t); | |
d7032b1f | 1198 | |
9aa82023 ZJS |
1199 | if (get_process_cwd(pid, &t) >= 0) |
1200 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CWD=", t); | |
3f132692 JF |
1201 | |
1202 | if (get_process_root(pid, &t) >= 0) { | |
9aa82023 ZJS |
1203 | bool proc_self_root_is_slash; |
1204 | ||
1205 | proc_self_root_is_slash = strcmp(t, "/") == 0; | |
3f132692 | 1206 | |
9aa82023 | 1207 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ROOT=", t); |
7ed03ce6 JF |
1208 | |
1209 | /* If the process' root is "/", then there is a chance it has | |
1210 | * mounted own root and hence being containerized. */ | |
9aa82023 ZJS |
1211 | if (proc_self_root_is_slash && get_process_container_parent_cmdline(pid, &t) > 0) |
1212 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CONTAINER_CMDLINE=", t); | |
3f132692 JF |
1213 | } |
1214 | ||
9aa82023 ZJS |
1215 | if (get_process_environ(pid, &t) >= 0) |
1216 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ENVIRON=", t); | |
1217 | ||
1218 | t = strjoin("COREDUMP_TIMESTAMP=", context[CONTEXT_TIMESTAMP], "000000", NULL); | |
1219 | if (t) | |
e6a7ec4b | 1220 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); |
9aa82023 | 1221 | |
d14bcb4e LP |
1222 | if (safe_atoi(context[CONTEXT_SIGNAL], &signo) >= 0 && SIGNAL_VALID(signo)) |
1223 | set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL_NAME=SIG", signal_to_string(signo)); | |
1224 | ||
92e92d71 | 1225 | return 0; /* we successfully acquired all metadata */ |
9aa82023 | 1226 | } |
3f132692 | 1227 | |
9aa82023 ZJS |
1228 | static int process_kernel(int argc, char* argv[]) { |
1229 | ||
ea5cc2a8 | 1230 | char* context[_CONTEXT_MAX] = {}; |
92e92d71 | 1231 | struct iovec iovec[28 + SUBMIT_COREDUMP_FIELDS]; |
988e89ee | 1232 | size_t i, n_iovec, n_to_free = 0; |
9aa82023 ZJS |
1233 | int r; |
1234 | ||
988e89ee ZJS |
1235 | log_debug("Processing coredump received from the kernel..."); |
1236 | ||
9aa82023 | 1237 | if (argc < CONTEXT_COMM + 1) { |
988e89ee | 1238 | log_error("Not enough arguments passed by the kernel (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); |
9aa82023 | 1239 | return -EINVAL; |
3f132692 JF |
1240 | } |
1241 | ||
ea5cc2a8 ZJS |
1242 | context[CONTEXT_PID] = argv[1 + CONTEXT_PID]; |
1243 | context[CONTEXT_UID] = argv[1 + CONTEXT_UID]; | |
1244 | context[CONTEXT_GID] = argv[1 + CONTEXT_GID]; | |
1245 | context[CONTEXT_SIGNAL] = argv[1 + CONTEXT_SIGNAL]; | |
1246 | context[CONTEXT_TIMESTAMP] = argv[1 + CONTEXT_TIMESTAMP]; | |
1247 | context[CONTEXT_RLIMIT] = argv[1 + CONTEXT_RLIMIT]; | |
9aa82023 | 1248 | |
92e92d71 ZJS |
1249 | r = gather_pid_metadata(context, argv + 1 + CONTEXT_COMM, iovec, &n_to_free); |
1250 | if (r < 0) | |
86562420 | 1251 | goto finish; |
86562420 | 1252 | |
988e89ee | 1253 | n_iovec = n_to_free; |
f5e04665 | 1254 | |
e6a7ec4b | 1255 | iovec[n_iovec++] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR); |
4850d39a LP |
1256 | |
1257 | assert_cc(2 == LOG_CRIT); | |
e6a7ec4b | 1258 | iovec[n_iovec++] = IOVEC_MAKE_STRING("PRIORITY=2"); |
0dc5d23c | 1259 | |
3c171f0b | 1260 | assert(n_iovec <= ELEMENTSOF(iovec)); |
34c10968 | 1261 | |
b8cda92d | 1262 | if (is_journald_crash((const char**) context) || is_pid1_crash((const char**) context)) |
92e92d71 ZJS |
1263 | r = submit_coredump((const char**) context, |
1264 | iovec, ELEMENTSOF(iovec), n_iovec, | |
1265 | STDIN_FILENO); | |
1266 | else | |
1267 | r = send_iovec(iovec, n_iovec, STDIN_FILENO); | |
9aa82023 ZJS |
1268 | |
1269 | finish: | |
1270 | for (i = 0; i < n_to_free; i++) | |
1271 | free(iovec[i].iov_base); | |
1272 | ||
92e92d71 | 1273 | /* Those fields are allocated by gather_pid_metadata */ |
ea5cc2a8 ZJS |
1274 | free(context[CONTEXT_COMM]); |
1275 | free(context[CONTEXT_EXE]); | |
92e92d71 | 1276 | free(context[CONTEXT_UNIT]); |
ea5cc2a8 | 1277 | |
9aa82023 | 1278 | return r; |
3c171f0b | 1279 | } |
34c10968 | 1280 | |
988e89ee | 1281 | static int process_backtrace(int argc, char *argv[]) { |
ea5cc2a8 ZJS |
1282 | char *context[_CONTEXT_MAX] = {}; |
1283 | _cleanup_free_ char *message = NULL; | |
5b45a160 ZJS |
1284 | _cleanup_free_ struct iovec *iovec = NULL; |
1285 | size_t n_iovec, n_allocated, n_to_free = 0, i; | |
988e89ee | 1286 | int r; |
5b45a160 ZJS |
1287 | JournalImporter importer = { |
1288 | .fd = STDIN_FILENO, | |
1289 | }; | |
988e89ee ZJS |
1290 | |
1291 | log_debug("Processing backtrace on stdin..."); | |
1292 | ||
1293 | if (argc < CONTEXT_COMM + 1) { | |
1294 | log_error("Not enough arguments passed (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); | |
1295 | return -EINVAL; | |
1296 | } | |
1297 | ||
ea5cc2a8 ZJS |
1298 | context[CONTEXT_PID] = argv[2 + CONTEXT_PID]; |
1299 | context[CONTEXT_UID] = argv[2 + CONTEXT_UID]; | |
1300 | context[CONTEXT_GID] = argv[2 + CONTEXT_GID]; | |
1301 | context[CONTEXT_SIGNAL] = argv[2 + CONTEXT_SIGNAL]; | |
1302 | context[CONTEXT_TIMESTAMP] = argv[2 + CONTEXT_TIMESTAMP]; | |
1303 | context[CONTEXT_RLIMIT] = argv[2 + CONTEXT_RLIMIT]; | |
988e89ee | 1304 | |
92e92d71 ZJS |
1305 | n_allocated = 33 + COREDUMP_STORAGE_EXTERNAL; |
1306 | /* 25 metadata, 2 static, +unknown input, 4 storage, rounded up */ | |
5b45a160 ZJS |
1307 | iovec = new(struct iovec, n_allocated); |
1308 | if (!iovec) | |
1309 | return log_oom(); | |
1310 | ||
92e92d71 | 1311 | r = gather_pid_metadata(context, argv + 2 + CONTEXT_COMM, iovec, &n_to_free); |
988e89ee ZJS |
1312 | if (r < 0) |
1313 | goto finish; | |
86562420 LP |
1314 | if (r > 0) { |
1315 | /* This was a special crash, and has already been processed. */ | |
1316 | r = 0; | |
1317 | goto finish; | |
1318 | } | |
5b45a160 | 1319 | n_iovec = n_to_free; |
988e89ee | 1320 | |
86562420 | 1321 | for (;;) { |
5b45a160 ZJS |
1322 | r = journal_importer_process_data(&importer); |
1323 | if (r < 0) { | |
1324 | log_error_errno(r, "Failed to parse journal entry on stdin: %m"); | |
1325 | goto finish; | |
1326 | } | |
d74dc4f2 ZJS |
1327 | if (r == 1 || /* complete entry */ |
1328 | journal_importer_eof(&importer)) /* end of data */ | |
5b45a160 | 1329 | break; |
988e89ee | 1330 | } |
988e89ee | 1331 | |
5b45a160 ZJS |
1332 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + importer.iovw.count + 2)) |
1333 | return log_oom(); | |
1334 | ||
1335 | if (journal_importer_eof(&importer)) { | |
1336 | log_warning("Did not receive a full journal entry on stdin, ignoring message sent by reporter"); | |
988e89ee | 1337 | |
ea5cc2a8 ZJS |
1338 | message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
1339 | " (", context[CONTEXT_COMM], ")" | |
5b45a160 ZJS |
1340 | " of user ", context[CONTEXT_UID], |
1341 | " failed with ", context[CONTEXT_SIGNAL]); | |
1342 | if (!message) { | |
1343 | r = log_oom(); | |
1344 | goto finish; | |
1345 | } | |
e6a7ec4b | 1346 | iovec[n_iovec++] = IOVEC_MAKE_STRING(message); |
5b45a160 ZJS |
1347 | } else { |
1348 | for (i = 0; i < importer.iovw.count; i++) | |
1349 | iovec[n_iovec++] = importer.iovw.iovec[i]; | |
1350 | } | |
988e89ee | 1351 | |
e6a7ec4b | 1352 | iovec[n_iovec++] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR); |
988e89ee | 1353 | assert_cc(2 == LOG_CRIT); |
e6a7ec4b | 1354 | iovec[n_iovec++] = IOVEC_MAKE_STRING("PRIORITY=2"); |
988e89ee | 1355 | |
5b45a160 | 1356 | assert(n_iovec <= n_allocated); |
988e89ee ZJS |
1357 | |
1358 | r = sd_journal_sendv(iovec, n_iovec); | |
1359 | if (r < 0) | |
1360 | log_error_errno(r, "Failed to log backtrace: %m"); | |
1361 | ||
1362 | finish: | |
1363 | for (i = 0; i < n_to_free; i++) | |
1364 | free(iovec[i].iov_base); | |
1365 | ||
92e92d71 | 1366 | /* Those fields are allocated by gather_pid_metadata */ |
ea5cc2a8 ZJS |
1367 | free(context[CONTEXT_COMM]); |
1368 | free(context[CONTEXT_EXE]); | |
92e92d71 | 1369 | free(context[CONTEXT_UNIT]); |
ea5cc2a8 | 1370 | |
988e89ee ZJS |
1371 | return r; |
1372 | } | |
1373 | ||
3c171f0b LP |
1374 | int main(int argc, char *argv[]) { |
1375 | int r; | |
fee80f69 | 1376 | |
9aa82023 ZJS |
1377 | /* First, log to a safe place, since we don't know what crashed and it might |
1378 | * be journald which we'd rather not log to then. */ | |
8d4e028f | 1379 | |
3c171f0b LP |
1380 | log_set_target(LOG_TARGET_KMSG); |
1381 | log_open(); | |
8d4e028f | 1382 | |
3c171f0b LP |
1383 | /* Make sure we never enter a loop */ |
1384 | (void) prctl(PR_SET_DUMPABLE, 0); | |
8d4e028f | 1385 | |
3c171f0b LP |
1386 | /* Ignore all parse errors */ |
1387 | (void) parse_config(); | |
fee80f69 | 1388 | |
3c171f0b LP |
1389 | log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); |
1390 | log_debug("Selected compression %s.", yes_no(arg_compress)); | |
fee80f69 | 1391 | |
3c171f0b LP |
1392 | r = sd_listen_fds(false); |
1393 | if (r < 0) { | |
1394 | log_error_errno(r, "Failed to determine number of file descriptor: %m"); | |
1395 | goto finish; | |
fee80f69 LP |
1396 | } |
1397 | ||
9aa82023 ZJS |
1398 | /* If we got an fd passed, we are running in coredumpd mode. Otherwise we |
1399 | * are invoked from the kernel as coredump handler. */ | |
988e89ee ZJS |
1400 | if (r == 0) { |
1401 | if (streq_ptr(argv[1], "--backtrace")) | |
1402 | r = process_backtrace(argc, argv); | |
1403 | else | |
1404 | r = process_kernel(argc, argv); | |
1405 | } else if (r == 1) | |
3c171f0b LP |
1406 | r = process_socket(SD_LISTEN_FDS_START); |
1407 | else { | |
1408 | log_error("Received unexpected number of file descriptors."); | |
1409 | r = -EINVAL; | |
1410 | } | |
f5e04665 LP |
1411 | |
1412 | finish: | |
f5e04665 LP |
1413 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
1414 | } |