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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 | 22 | #include <stdio.h> |
0d536673 | 23 | #include <stdio_ext.h> |
803a3464 | 24 | #include <sys/prctl.h> |
cacd6403 | 25 | #include <sys/xattr.h> |
4f5dd394 | 26 | #include <unistd.h> |
f5e04665 | 27 | |
349cc4a5 | 28 | #if HAVE_ELFUTILS |
3c171f0b LP |
29 | #include <dwarf.h> |
30 | #include <elfutils/libdwfl.h> | |
4d229b31 UTL |
31 | #endif |
32 | ||
73a99163 | 33 | #include "sd-daemon.h" |
f11943c5 LP |
34 | #include "sd-journal.h" |
35 | #include "sd-login.h" | |
73a99163 | 36 | #include "sd-messages.h" |
4f5dd394 LP |
37 | |
38 | #include "acl-util.h" | |
b5efdb8a | 39 | #include "alloc-util.h" |
430f0182 | 40 | #include "capability-util.h" |
ba1261bc | 41 | #include "cgroup-util.h" |
4f5dd394 | 42 | #include "compress.h" |
34c10968 LP |
43 | #include "conf-parser.h" |
44 | #include "copy.h" | |
f11943c5 | 45 | #include "coredump-vacuum.h" |
a0956174 | 46 | #include "dirent-util.h" |
4f5dd394 | 47 | #include "escape.h" |
3ffd4af2 | 48 | #include "fd-util.h" |
4f5dd394 | 49 | #include "fileio.h" |
f4f15635 | 50 | #include "fs-util.h" |
afc5dbf3 | 51 | #include "io-util.h" |
b18453ed | 52 | #include "journal-importer.h" |
4f5dd394 LP |
53 | #include "log.h" |
54 | #include "macro.h" | |
0c773903 | 55 | #include "missing.h" |
4f5dd394 | 56 | #include "mkdir.h" |
6bedfcbb | 57 | #include "parse-util.h" |
0b452006 | 58 | #include "process-util.h" |
d14bcb4e | 59 | #include "signal-util.h" |
3c171f0b | 60 | #include "socket-util.h" |
4f5dd394 LP |
61 | #include "special.h" |
62 | #include "stacktrace.h" | |
8b43440b | 63 | #include "string-table.h" |
07630cea | 64 | #include "string-util.h" |
4f5dd394 | 65 | #include "strv.h" |
b1d4f8e1 | 66 | #include "user-util.h" |
4f5dd394 | 67 | #include "util.h" |
34727273 | 68 | |
34c10968 | 69 | /* The maximum size up to which we process coredumps */ |
59f448cf | 70 | #define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) |
34c10968 | 71 | |
bdfd7b2c | 72 | /* The maximum size up to which we leave the coredump around on disk */ |
34c10968 LP |
73 | #define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX |
74 | ||
bdfd7b2c | 75 | /* The maximum size up to which we store the coredump in the journal */ |
34c10968 | 76 | #define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) |
f5e04665 | 77 | |
c4aa09b0 | 78 | /* Make sure to not make this larger than the maximum journal entry |
874bc134 ZJS |
79 | * size. See DATA_SIZE_MAX in journald-native.c. */ |
80 | assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); | |
f5e04665 LP |
81 | |
82 | enum { | |
ea5cc2a8 ZJS |
83 | /* We use this as array indexes for a couple of special fields we use for |
84 | * naming coredump files, and attaching xattrs, and for indexing argv[]. | |
85 | ||
86 | * Our pattern for man:systectl(1) kernel.core_pattern is such that the | |
87 | * kernel passes fields until CONTEXT_RLIMIT as arguments in argv[]. After | |
88 | * that it gets complicated: the kernel passes "comm" as one or more fields | |
89 | * starting at index CONTEXT_COMM (in other words, full "comm" is under index | |
90 | * CONTEXT_COMM when it does not contain spaces, which is the common | |
91 | * case). This mapping is not reversible, so we prefer to retrieve "comm" | |
92 | * from /proc. We only fall back to argv[CONTEXT_COMM...] when that fails. | |
93 | * | |
94 | * In the internal context[] array, fields before CONTEXT_COMM are the | |
95 | * strings from argv[], so they should not be freed. The strings at indices | |
96 | * CONTEXT_COMM and higher are allocated by us and should be freed at the | |
97 | * end. | |
98 | */ | |
3c171f0b LP |
99 | CONTEXT_PID, |
100 | CONTEXT_UID, | |
101 | CONTEXT_GID, | |
102 | CONTEXT_SIGNAL, | |
103 | CONTEXT_TIMESTAMP, | |
bdfd7b2c | 104 | CONTEXT_RLIMIT, |
f45b8015 | 105 | CONTEXT_HOSTNAME, |
3c171f0b LP |
106 | CONTEXT_COMM, |
107 | CONTEXT_EXE, | |
92e92d71 | 108 | CONTEXT_UNIT, |
3c171f0b | 109 | _CONTEXT_MAX |
f5e04665 LP |
110 | }; |
111 | ||
34c10968 LP |
112 | typedef enum CoredumpStorage { |
113 | COREDUMP_STORAGE_NONE, | |
114 | COREDUMP_STORAGE_EXTERNAL, | |
115 | COREDUMP_STORAGE_JOURNAL, | |
34c10968 LP |
116 | _COREDUMP_STORAGE_MAX, |
117 | _COREDUMP_STORAGE_INVALID = -1 | |
118 | } CoredumpStorage; | |
119 | ||
34c10968 LP |
120 | static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { |
121 | [COREDUMP_STORAGE_NONE] = "none", | |
122 | [COREDUMP_STORAGE_EXTERNAL] = "external", | |
123 | [COREDUMP_STORAGE_JOURNAL] = "journal", | |
34c10968 LP |
124 | }; |
125 | ||
126 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); | |
8c9571d0 | 127 | static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); |
34727273 ZJS |
128 | |
129 | static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
8c9571d0 | 130 | static bool arg_compress = true; |
59f448cf LP |
131 | static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; |
132 | static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; | |
6e2b4a69 | 133 | static uint64_t arg_journal_size_max = JOURNAL_SIZE_MAX; |
59f448cf LP |
134 | static uint64_t arg_keep_free = (uint64_t) -1; |
135 | static uint64_t arg_max_use = (uint64_t) -1; | |
34c10968 LP |
136 | |
137 | static int parse_config(void) { | |
34c10968 | 138 | static const ConfigTableItem items[] = { |
8c9571d0 LP |
139 | { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, |
140 | { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, | |
59f448cf LP |
141 | { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, |
142 | { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, | |
8c9571d0 | 143 | { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, |
59f448cf LP |
144 | { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, |
145 | { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, | |
34c10968 LP |
146 | {} |
147 | }; | |
148 | ||
43688c49 | 149 | return config_parse_many_nulstr(PKGSYSCONFDIR "/coredump.conf", |
da412854 YW |
150 | CONF_PATHS_NULSTR("systemd/coredump.conf.d"), |
151 | "Coredump\0", | |
152 | config_item_table_lookup, items, | |
bcde742e | 153 | CONFIG_PARSE_WARN, NULL); |
34c10968 LP |
154 | } |
155 | ||
73a99163 ZJS |
156 | static inline uint64_t storage_size_max(void) { |
157 | return arg_storage == COREDUMP_STORAGE_EXTERNAL ? arg_external_size_max : arg_journal_size_max; | |
158 | } | |
159 | ||
34c10968 LP |
160 | static int fix_acl(int fd, uid_t uid) { |
161 | ||
349cc4a5 | 162 | #if HAVE_ACL |
34c10968 LP |
163 | _cleanup_(acl_freep) acl_t acl = NULL; |
164 | acl_entry_t entry; | |
165 | acl_permset_t permset; | |
709f6e46 | 166 | int r; |
34c10968 | 167 | |
b59233e6 LP |
168 | assert(fd >= 0); |
169 | ||
05fd2156 | 170 | if (uid_is_system(uid) || uid_is_dynamic(uid) || uid == UID_NOBODY) |
34c10968 LP |
171 | return 0; |
172 | ||
173 | /* Make sure normal users can read (but not write or delete) | |
174 | * their own coredumps */ | |
175 | ||
176 | acl = acl_get_fd(fd); | |
4a62c710 MS |
177 | if (!acl) |
178 | return log_error_errno(errno, "Failed to get ACL: %m"); | |
34c10968 LP |
179 | |
180 | if (acl_create_entry(&acl, &entry) < 0 || | |
181 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
d710aaf7 ZJS |
182 | acl_set_qualifier(entry, &uid) < 0) |
183 | return log_error_errno(errno, "Failed to patch ACL: %m"); | |
34c10968 LP |
184 | |
185 | if (acl_get_permset(entry, &permset) < 0 || | |
709f6e46 MS |
186 | acl_add_perm(permset, ACL_READ) < 0) |
187 | return log_warning_errno(errno, "Failed to patch ACL: %m"); | |
188 | ||
189 | r = calc_acl_mask_if_needed(&acl); | |
190 | if (r < 0) | |
191 | return log_warning_errno(r, "Failed to patch ACL: %m"); | |
34c10968 | 192 | |
4a62c710 MS |
193 | if (acl_set_fd(fd, acl) < 0) |
194 | return log_error_errno(errno, "Failed to apply ACL: %m"); | |
34c10968 LP |
195 | #endif |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
3c171f0b | 200 | static int fix_xattr(int fd, const char *context[_CONTEXT_MAX]) { |
0cd77f97 | 201 | |
3c171f0b LP |
202 | static const char * const xattrs[_CONTEXT_MAX] = { |
203 | [CONTEXT_PID] = "user.coredump.pid", | |
204 | [CONTEXT_UID] = "user.coredump.uid", | |
205 | [CONTEXT_GID] = "user.coredump.gid", | |
206 | [CONTEXT_SIGNAL] = "user.coredump.signal", | |
207 | [CONTEXT_TIMESTAMP] = "user.coredump.timestamp", | |
6d337300 | 208 | [CONTEXT_RLIMIT] = "user.coredump.rlimit", |
f45b8015 | 209 | [CONTEXT_HOSTNAME] = "user.coredump.hostname", |
3c171f0b LP |
210 | [CONTEXT_COMM] = "user.coredump.comm", |
211 | [CONTEXT_EXE] = "user.coredump.exe", | |
0cd77f97 LP |
212 | }; |
213 | ||
34c10968 | 214 | int r = 0; |
0cd77f97 | 215 | unsigned i; |
34c10968 | 216 | |
b59233e6 LP |
217 | assert(fd >= 0); |
218 | ||
1eef15b1 | 219 | /* Attach some metadata to coredumps via extended |
34c10968 LP |
220 | * attributes. Just because we can. */ |
221 | ||
3c171f0b | 222 | for (i = 0; i < _CONTEXT_MAX; i++) { |
1eef15b1 ZJS |
223 | int k; |
224 | ||
3c171f0b | 225 | if (isempty(context[i]) || !xattrs[i]) |
0cd77f97 | 226 | continue; |
34c10968 | 227 | |
3c171f0b | 228 | k = fsetxattr(fd, xattrs[i], context[i], strlen(context[i]), XATTR_CREATE); |
1eef15b1 | 229 | if (k < 0 && r == 0) |
34c10968 | 230 | r = -errno; |
0cd77f97 | 231 | } |
34c10968 LP |
232 | |
233 | return r; | |
234 | } | |
235 | ||
b0b21dce | 236 | #define filename_escape(s) xescape((s), "./ ") |
34c10968 | 237 | |
0c773903 EV |
238 | static inline const char *coredump_tmpfile_name(const char *s) { |
239 | return s ? s : "(unnamed temporary file)"; | |
240 | } | |
241 | ||
b59233e6 LP |
242 | static int fix_permissions( |
243 | int fd, | |
244 | const char *filename, | |
245 | const char *target, | |
3c171f0b | 246 | const char *context[_CONTEXT_MAX], |
b59233e6 LP |
247 | uid_t uid) { |
248 | ||
03532f0a LP |
249 | int r; |
250 | ||
b59233e6 | 251 | assert(fd >= 0); |
b59233e6 | 252 | assert(target); |
3c171f0b | 253 | assert(context); |
cfd652ed ZJS |
254 | |
255 | /* Ignore errors on these */ | |
3c171f0b LP |
256 | (void) fchmod(fd, 0640); |
257 | (void) fix_acl(fd, uid); | |
258 | (void) fix_xattr(fd, context); | |
cfd652ed | 259 | |
4a62c710 | 260 | if (fsync(fd) < 0) |
0c773903 | 261 | return log_error_errno(errno, "Failed to sync coredump %s: %m", coredump_tmpfile_name(filename)); |
cfd652ed | 262 | |
8ac2f74f LP |
263 | (void) fsync_directory_of_file(fd); |
264 | ||
03532f0a LP |
265 | r = link_tmpfile(fd, filename, target); |
266 | if (r < 0) | |
267 | return log_error_errno(r, "Failed to move coredump %s into place: %m", target); | |
cfd652ed ZJS |
268 | |
269 | return 0; | |
270 | } | |
271 | ||
59f448cf | 272 | static int maybe_remove_external_coredump(const char *filename, uint64_t size) { |
cfd652ed | 273 | |
b59233e6 | 274 | /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ |
cfd652ed | 275 | |
fc6cec86 | 276 | if (arg_storage == COREDUMP_STORAGE_EXTERNAL && |
cfd652ed ZJS |
277 | size <= arg_external_size_max) |
278 | return 0; | |
279 | ||
280 | if (!filename) | |
281 | return 1; | |
282 | ||
4a62c710 MS |
283 | if (unlink(filename) < 0 && errno != ENOENT) |
284 | return log_error_errno(errno, "Failed to unlink %s: %m", filename); | |
cfd652ed ZJS |
285 | |
286 | return 1; | |
287 | } | |
288 | ||
3c171f0b | 289 | static int make_filename(const char *context[_CONTEXT_MAX], char **ret) { |
b59233e6 | 290 | _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; |
a7f7d1bd | 291 | sd_id128_t boot = {}; |
34c10968 LP |
292 | int r; |
293 | ||
3c171f0b | 294 | assert(context); |
34c10968 | 295 | |
3c171f0b | 296 | c = filename_escape(context[CONTEXT_COMM]); |
34c10968 | 297 | if (!c) |
b59233e6 | 298 | return -ENOMEM; |
34c10968 | 299 | |
3c171f0b | 300 | u = filename_escape(context[CONTEXT_UID]); |
0dc5d23c | 301 | if (!u) |
b59233e6 | 302 | return -ENOMEM; |
34c10968 LP |
303 | |
304 | r = sd_id128_get_boot(&boot); | |
b59233e6 | 305 | if (r < 0) |
34c10968 | 306 | return r; |
34c10968 | 307 | |
3c171f0b | 308 | p = filename_escape(context[CONTEXT_PID]); |
b59233e6 LP |
309 | if (!p) |
310 | return -ENOMEM; | |
311 | ||
3c171f0b | 312 | t = filename_escape(context[CONTEXT_TIMESTAMP]); |
b59233e6 LP |
313 | if (!t) |
314 | return -ENOMEM; | |
315 | ||
316 | if (asprintf(ret, | |
0dc5d23c | 317 | "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", |
34c10968 | 318 | c, |
0dc5d23c | 319 | u, |
34c10968 LP |
320 | SD_ID128_FORMAT_VAL(boot), |
321 | p, | |
b59233e6 LP |
322 | t) < 0) |
323 | return -ENOMEM; | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int save_external_coredump( | |
3c171f0b LP |
329 | const char *context[_CONTEXT_MAX], |
330 | int input_fd, | |
b59233e6 | 331 | char **ret_filename, |
5f3e0a74 HW |
332 | int *ret_node_fd, |
333 | int *ret_data_fd, | |
0cd4e913 | 334 | uint64_t *ret_size, |
cc4419ed | 335 | bool *ret_truncated) { |
b59233e6 LP |
336 | |
337 | _cleanup_free_ char *fn = NULL, *tmp = NULL; | |
338 | _cleanup_close_ int fd = -1; | |
bdfd7b2c | 339 | uint64_t rlimit, max_size; |
b59233e6 | 340 | struct stat st; |
3c171f0b | 341 | uid_t uid; |
b59233e6 LP |
342 | int r; |
343 | ||
3c171f0b | 344 | assert(context); |
b59233e6 | 345 | assert(ret_filename); |
5f3e0a74 HW |
346 | assert(ret_node_fd); |
347 | assert(ret_data_fd); | |
b59233e6 LP |
348 | assert(ret_size); |
349 | ||
3c171f0b LP |
350 | r = parse_uid(context[CONTEXT_UID], &uid); |
351 | if (r < 0) | |
352 | return log_error_errno(r, "Failed to parse UID: %m"); | |
353 | ||
bdfd7b2c LP |
354 | r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit); |
355 | if (r < 0) | |
356 | return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]); | |
6998b540 ZJS |
357 | if (rlimit < page_size()) { |
358 | /* Is coredumping disabled? Then don't bother saving/processing the coredump. | |
359 | * Anything below PAGE_SIZE cannot give a readable coredump (the kernel uses | |
360 | * ELF_EXEC_PAGESIZE which is not easily accessible, but is usually the same as PAGE_SIZE. */ | |
73a99163 ZJS |
361 | log_info("Resource limits disable core dumping for process %s (%s).", |
362 | context[CONTEXT_PID], context[CONTEXT_COMM]); | |
bdfd7b2c LP |
363 | return -EBADSLT; |
364 | } | |
365 | ||
366 | /* Never store more than the process configured, or than we actually shall keep or process */ | |
73a99163 | 367 | max_size = MIN(rlimit, MAX(arg_process_size_max, storage_size_max())); |
bdfd7b2c | 368 | |
3c171f0b | 369 | r = make_filename(context, &fn); |
23bbb0de MS |
370 | if (r < 0) |
371 | return log_error_errno(r, "Failed to determine coredump file name: %m"); | |
34c10968 | 372 | |
d2e54fae | 373 | mkdir_p_label("/var/lib/systemd/coredump", 0755); |
803a3464 | 374 | |
03532f0a | 375 | fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp); |
4a62c710 | 376 | if (fd < 0) |
03532f0a | 377 | return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn); |
803a3464 | 378 | |
1c876927 | 379 | r = copy_bytes(input_fd, fd, max_size, 0); |
73a99163 ZJS |
380 | if (r < 0) { |
381 | log_error_errno(r, "Cannot store coredump of %s (%s): %m", context[CONTEXT_PID], context[CONTEXT_COMM]); | |
93240d3a | 382 | goto fail; |
0cd4e913 | 383 | } |
cc4419ed ZJS |
384 | *ret_truncated = r == 1; |
385 | if (*ret_truncated) | |
73a99163 ZJS |
386 | log_struct(LOG_INFO, |
387 | LOG_MESSAGE("Core file was truncated to %zu bytes.", max_size), | |
388 | "SIZE_LIMIT=%zu", max_size, | |
2b044526 | 389 | "MESSAGE_ID=" SD_MESSAGE_TRUNCATED_CORE_STR, |
73a99163 | 390 | NULL); |
803a3464 | 391 | |
34c10968 | 392 | if (fstat(fd, &st) < 0) { |
73a99163 | 393 | log_error_errno(errno, "Failed to fstat core file %s: %m", coredump_tmpfile_name(tmp)); |
34c10968 LP |
394 | goto fail; |
395 | } | |
396 | ||
7849c2ac | 397 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { |
0c773903 | 398 | log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp)); |
b59233e6 | 399 | goto fail; |
7849c2ac TA |
400 | } |
401 | ||
349cc4a5 | 402 | #if HAVE_XZ || HAVE_LZ4 |
cfd652ed | 403 | /* If we will remove the coredump anyway, do not compress. */ |
6e9ef603 | 404 | if (arg_compress && !maybe_remove_external_coredump(NULL, st.st_size)) { |
cfd652ed | 405 | |
b59233e6 LP |
406 | _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; |
407 | _cleanup_close_ int fd_compressed = -1; | |
cfd652ed | 408 | |
d89c8fdf | 409 | fn_compressed = strappend(fn, COMPRESSED_EXT); |
b59233e6 | 410 | if (!fn_compressed) { |
d89c8fdf | 411 | log_oom(); |
cfd652ed ZJS |
412 | goto uncompressed; |
413 | } | |
414 | ||
03532f0a LP |
415 | fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed); |
416 | if (fd_compressed < 0) { | |
417 | log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed); | |
b59233e6 | 418 | goto uncompressed; |
03532f0a | 419 | } |
cfd652ed | 420 | |
d89c8fdf | 421 | r = compress_stream(fd, fd_compressed, -1); |
b59233e6 | 422 | if (r < 0) { |
0c773903 | 423 | log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed)); |
b59233e6 LP |
424 | goto fail_compressed; |
425 | } | |
426 | ||
3c171f0b | 427 | r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid); |
cfd652ed | 428 | if (r < 0) |
b59233e6 LP |
429 | goto fail_compressed; |
430 | ||
431 | /* OK, this worked, we can get rid of the uncompressed version now */ | |
0c773903 EV |
432 | if (tmp) |
433 | unlink_noerrno(tmp); | |
cfd652ed | 434 | |
1cc6c93a YW |
435 | *ret_filename = TAKE_PTR(fn_compressed); /* compressed */ |
436 | *ret_node_fd = TAKE_FD(fd_compressed); /* compressed */ | |
437 | *ret_data_fd = TAKE_FD(fd); /* uncompressed */ | |
59f448cf | 438 | *ret_size = (uint64_t) st.st_size; /* uncompressed */ |
cfd652ed | 439 | |
cfd652ed ZJS |
440 | return 0; |
441 | ||
b59233e6 | 442 | fail_compressed: |
0c773903 EV |
443 | if (tmp_compressed) |
444 | (void) unlink(tmp_compressed); | |
34c10968 | 445 | } |
cfd652ed ZJS |
446 | |
447 | uncompressed: | |
3b1a55e1 | 448 | #endif |
5f3e0a74 | 449 | |
3c171f0b | 450 | r = fix_permissions(fd, tmp, fn, context, uid); |
cfd652ed ZJS |
451 | if (r < 0) |
452 | goto fail; | |
34c10968 | 453 | |
1cc6c93a YW |
454 | *ret_filename = TAKE_PTR(fn); |
455 | *ret_data_fd = TAKE_FD(fd); | |
5f3e0a74 | 456 | *ret_node_fd = -1; |
59f448cf | 457 | *ret_size = (uint64_t) st.st_size; |
34c10968 | 458 | |
34c10968 LP |
459 | return 0; |
460 | ||
461 | fail: | |
0c773903 EV |
462 | if (tmp) |
463 | (void) unlink(tmp); | |
34c10968 LP |
464 | return r; |
465 | } | |
466 | ||
467 | static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { | |
468 | _cleanup_free_ char *field = NULL; | |
469 | ssize_t n; | |
470 | ||
8d4e028f | 471 | assert(fd >= 0); |
34c10968 LP |
472 | assert(ret); |
473 | assert(ret_size); | |
474 | ||
4a62c710 MS |
475 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
476 | return log_warning_errno(errno, "Failed to seek: %m"); | |
803a3464 | 477 | |
34c10968 LP |
478 | field = malloc(9 + size); |
479 | if (!field) { | |
cfd652ed | 480 | log_warning("Failed to allocate memory for coredump, coredump will not be stored."); |
34c10968 LP |
481 | return -ENOMEM; |
482 | } | |
483 | ||
484 | memcpy(field, "COREDUMP=", 9); | |
485 | ||
486 | n = read(fd, field + 9, size); | |
23bbb0de MS |
487 | if (n < 0) |
488 | return log_error_errno((int) n, "Failed to read core data: %m"); | |
34c10968 LP |
489 | if ((size_t) n < size) { |
490 | log_error("Core data too short."); | |
491 | return -EIO; | |
492 | } | |
493 | ||
1cc6c93a | 494 | *ret = TAKE_PTR(field); |
34c10968 LP |
495 | *ret_size = size + 9; |
496 | ||
34c10968 LP |
497 | return 0; |
498 | } | |
803a3464 | 499 | |
3f132692 JF |
500 | /* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: |
501 | * 0:/dev/pts/23 | |
502 | * pos: 0 | |
503 | * flags: 0100002 | |
504 | * | |
505 | * 1:/dev/pts/23 | |
506 | * pos: 0 | |
507 | * flags: 0100002 | |
508 | * | |
509 | * 2:/dev/pts/23 | |
510 | * pos: 0 | |
511 | * flags: 0100002 | |
512 | * EOF | |
513 | */ | |
514 | static int compose_open_fds(pid_t pid, char **open_fds) { | |
4d84bc2f LP |
515 | _cleanup_closedir_ DIR *proc_fd_dir = NULL; |
516 | _cleanup_close_ int proc_fdinfo_fd = -1; | |
517 | _cleanup_free_ char *buffer = NULL; | |
3f132692 | 518 | _cleanup_fclose_ FILE *stream = NULL; |
59059b4a | 519 | const char *fddelim = "", *path; |
3f132692 | 520 | struct dirent *dent = NULL; |
4d84bc2f | 521 | size_t size = 0; |
3f132692 JF |
522 | int r = 0; |
523 | ||
524 | assert(pid >= 0); | |
525 | assert(open_fds != NULL); | |
526 | ||
59059b4a | 527 | path = procfs_file_alloca(pid, "fd"); |
3f132692 | 528 | proc_fd_dir = opendir(path); |
59059b4a ZJS |
529 | if (!proc_fd_dir) |
530 | return -errno; | |
3f132692 | 531 | |
4d84bc2f | 532 | proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); |
59059b4a ZJS |
533 | if (proc_fdinfo_fd < 0) |
534 | return -errno; | |
3f132692 | 535 | |
4d84bc2f | 536 | stream = open_memstream(&buffer, &size); |
3f132692 JF |
537 | if (!stream) |
538 | return -ENOMEM; | |
539 | ||
0d536673 LP |
540 | (void) __fsetlocking(stream, FSETLOCKING_BYCALLER); |
541 | ||
4d84bc2f | 542 | FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { |
3f132692 | 543 | _cleanup_fclose_ FILE *fdinfo = NULL; |
4d84bc2f | 544 | _cleanup_free_ char *fdname = NULL; |
59059b4a | 545 | char line[LINE_MAX]; |
4d84bc2f | 546 | int fd; |
3f132692 | 547 | |
59059b4a | 548 | r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); |
3f132692 JF |
549 | if (r < 0) |
550 | return r; | |
551 | ||
552 | fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); | |
553 | fddelim = "\n"; | |
554 | ||
555 | /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ | |
59059b4a ZJS |
556 | fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); |
557 | if (fd < 0) | |
3f132692 JF |
558 | continue; |
559 | ||
59059b4a | 560 | fdinfo = fdopen(fd, "re"); |
234519ae | 561 | if (!fdinfo) { |
0d536673 | 562 | safe_close(fd); |
3f132692 | 563 | continue; |
59059b4a | 564 | } |
3f132692 | 565 | |
4d84bc2f | 566 | FOREACH_LINE(line, fdinfo, break) { |
0d536673 | 567 | fputs(line, stream); |
4d84bc2f LP |
568 | if (!endswith(line, "\n")) |
569 | fputc('\n', stream); | |
570 | } | |
3f132692 JF |
571 | } |
572 | ||
4d84bc2f | 573 | errno = 0; |
74ca738f | 574 | stream = safe_fclose(stream); |
4d84bc2f | 575 | |
b3267152 | 576 | if (errno > 0) |
4d84bc2f LP |
577 | return -errno; |
578 | ||
ae2a15bc | 579 | *open_fds = TAKE_PTR(buffer); |
4d84bc2f | 580 | |
3f132692 JF |
581 | return 0; |
582 | } | |
583 | ||
7ed03ce6 JF |
584 | static int get_process_ns(pid_t pid, const char *namespace, ino_t *ns) { |
585 | const char *p; | |
586 | struct stat stbuf; | |
587 | _cleanup_close_ int proc_ns_dir_fd; | |
588 | ||
589 | p = procfs_file_alloca(pid, "ns"); | |
590 | ||
591 | proc_ns_dir_fd = open(p, O_DIRECTORY | O_CLOEXEC | O_RDONLY); | |
592 | if (proc_ns_dir_fd < 0) | |
593 | return -errno; | |
594 | ||
595 | if (fstatat(proc_ns_dir_fd, namespace, &stbuf, /* flags */0) < 0) | |
596 | return -errno; | |
597 | ||
598 | *ns = stbuf.st_ino; | |
599 | return 0; | |
600 | } | |
601 | ||
602 | static int get_mount_namespace_leader(pid_t pid, pid_t *container_pid) { | |
603 | pid_t cpid = pid, ppid = 0; | |
604 | ino_t proc_mntns; | |
605 | int r = 0; | |
606 | ||
607 | r = get_process_ns(pid, "mnt", &proc_mntns); | |
608 | if (r < 0) | |
609 | return r; | |
610 | ||
aa7530d6 | 611 | for (;;) { |
7ed03ce6 JF |
612 | ino_t parent_mntns; |
613 | ||
614 | r = get_process_ppid(cpid, &ppid); | |
615 | if (r < 0) | |
616 | return r; | |
617 | ||
618 | r = get_process_ns(ppid, "mnt", &parent_mntns); | |
619 | if (r < 0) | |
620 | return r; | |
621 | ||
622 | if (proc_mntns != parent_mntns) | |
623 | break; | |
624 | ||
625 | if (ppid == 1) | |
626 | return -ENOENT; | |
627 | ||
628 | cpid = ppid; | |
629 | } | |
630 | ||
631 | *container_pid = ppid; | |
632 | return 0; | |
633 | } | |
634 | ||
635 | /* Returns 1 if the parent was found. | |
636 | * Returns 0 if there is not a process we can call the pid's | |
637 | * container parent (the pid's process isn't 'containerized'). | |
638 | * Returns a negative number on errors. | |
639 | */ | |
640 | static int get_process_container_parent_cmdline(pid_t pid, char** cmdline) { | |
641 | int r = 0; | |
642 | pid_t container_pid; | |
643 | const char *proc_root_path; | |
644 | struct stat root_stat, proc_root_stat; | |
645 | ||
646 | /* To compare inodes of / and /proc/[pid]/root */ | |
647 | if (stat("/", &root_stat) < 0) | |
648 | return -errno; | |
649 | ||
650 | proc_root_path = procfs_file_alloca(pid, "root"); | |
651 | if (stat(proc_root_path, &proc_root_stat) < 0) | |
652 | return -errno; | |
653 | ||
654 | /* The process uses system root. */ | |
655 | if (proc_root_stat.st_ino == root_stat.st_ino) { | |
656 | *cmdline = NULL; | |
657 | return 0; | |
658 | } | |
659 | ||
660 | r = get_mount_namespace_leader(pid, &container_pid); | |
661 | if (r < 0) | |
662 | return r; | |
663 | ||
d3cba4ea EV |
664 | r = get_process_cmdline(container_pid, 0, false, cmdline); |
665 | if (r < 0) | |
666 | return r; | |
667 | ||
668 | return 1; | |
7ed03ce6 JF |
669 | } |
670 | ||
3c171f0b LP |
671 | static int change_uid_gid(const char *context[]) { |
672 | uid_t uid; | |
673 | gid_t gid; | |
674 | int r; | |
34c10968 | 675 | |
3c171f0b LP |
676 | r = parse_uid(context[CONTEXT_UID], &uid); |
677 | if (r < 0) | |
678 | return r; | |
8c8549db | 679 | |
888e378d LP |
680 | if (uid <= SYSTEM_UID_MAX) { |
681 | const char *user = "systemd-coredump"; | |
682 | ||
683 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
684 | if (r < 0) { | |
685 | log_warning_errno(r, "Cannot resolve %s user. Proceeding to dump core as root: %m", user); | |
686 | uid = gid = 0; | |
687 | } | |
688 | } else { | |
689 | r = parse_gid(context[CONTEXT_GID], &gid); | |
690 | if (r < 0) | |
691 | return r; | |
692 | } | |
3c171f0b LP |
693 | |
694 | return drop_privileges(uid, gid, 0); | |
695 | } | |
8c8549db | 696 | |
b8cda92d LP |
697 | static bool is_journald_crash(const char *context[_CONTEXT_MAX]) { |
698 | assert(context); | |
699 | ||
700 | return streq_ptr(context[CONTEXT_UNIT], SPECIAL_JOURNALD_SERVICE); | |
701 | } | |
702 | ||
703 | static bool is_pid1_crash(const char *context[_CONTEXT_MAX]) { | |
704 | assert(context); | |
705 | ||
706 | return streq_ptr(context[CONTEXT_UNIT], SPECIAL_INIT_SCOPE) || | |
707 | streq_ptr(context[CONTEXT_PID], "1"); | |
708 | } | |
709 | ||
0cd4e913 ZJS |
710 | #define SUBMIT_COREDUMP_FIELDS 4 |
711 | ||
3c171f0b LP |
712 | static int submit_coredump( |
713 | const char *context[_CONTEXT_MAX], | |
714 | struct iovec *iovec, | |
715 | size_t n_iovec_allocated, | |
716 | size_t n_iovec, | |
717 | int input_fd) { | |
34c10968 | 718 | |
5f3e0a74 | 719 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
3c171f0b | 720 | _cleanup_free_ char *core_message = NULL, *filename = NULL, *coredump_data = NULL; |
a5ca3649 | 721 | uint64_t coredump_size = UINT64_MAX; |
92e92d71 | 722 | bool truncated = false, journald_crash; |
3c171f0b | 723 | int r; |
f5e04665 | 724 | |
3c171f0b LP |
725 | assert(context); |
726 | assert(iovec); | |
0cd4e913 | 727 | assert(n_iovec_allocated >= n_iovec + SUBMIT_COREDUMP_FIELDS); |
3c171f0b | 728 | assert(input_fd >= 0); |
f5e04665 | 729 | |
b8cda92d | 730 | journald_crash = is_journald_crash(context); |
92e92d71 | 731 | |
3c171f0b LP |
732 | /* Vacuum before we write anything again */ |
733 | (void) coredump_vacuum(-1, arg_keep_free, arg_max_use); | |
803a3464 | 734 | |
3c171f0b | 735 | /* Always stream the coredump to disk, if that's possible */ |
0cd4e913 ZJS |
736 | r = save_external_coredump(context, input_fd, |
737 | &filename, &coredump_node_fd, &coredump_fd, &coredump_size, &truncated); | |
3c171f0b LP |
738 | if (r < 0) |
739 | /* Skip whole core dumping part */ | |
740 | goto log; | |
741 | ||
742 | /* If we don't want to keep the coredump on disk, remove it now, as later on we will lack the privileges for | |
743 | * it. However, we keep the fd to it, so that we can still process it and log it. */ | |
744 | r = maybe_remove_external_coredump(filename, coredump_size); | |
745 | if (r < 0) | |
746 | return r; | |
747 | if (r == 0) { | |
748 | const char *coredump_filename; | |
749 | ||
750 | coredump_filename = strjoina("COREDUMP_FILENAME=", filename); | |
e6a7ec4b | 751 | iovec[n_iovec++] = IOVEC_MAKE_STRING(coredump_filename); |
6e9ef603 | 752 | } else if (arg_storage == COREDUMP_STORAGE_EXTERNAL) |
5206a724 | 753 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 754 | coredump_size, arg_external_size_max); |
f5e04665 | 755 | |
3c171f0b LP |
756 | /* Vacuum again, but exclude the coredump we just created */ |
757 | (void) coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); | |
8c9571d0 | 758 | |
3c171f0b LP |
759 | /* Now, let's drop privileges to become the user who owns the segfaulted process and allocate the coredump |
760 | * memory under the user's uid. This also ensures that the credentials journald will see are the ones of the | |
761 | * coredumping user, thus making sure the user gets access to the core dump. Let's also get rid of all | |
762 | * capabilities, if we run as root, we won't need them anymore. */ | |
763 | r = change_uid_gid(context); | |
764 | if (r < 0) | |
765 | return log_error_errno(r, "Failed to drop privileges: %m"); | |
34c10968 | 766 | |
349cc4a5 | 767 | #if HAVE_ELFUTILS |
3c171f0b LP |
768 | /* Try to get a strack trace if we can */ |
769 | if (coredump_size <= arg_process_size_max) { | |
770 | _cleanup_free_ char *stacktrace = NULL; | |
771 | ||
772 | r = coredump_make_stack_trace(coredump_fd, context[CONTEXT_EXE], &stacktrace); | |
773 | if (r >= 0) | |
605405c6 ZJS |
774 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
775 | " (", context[CONTEXT_COMM], ") of user ", | |
92e92d71 ZJS |
776 | context[CONTEXT_UID], " dumped core.", |
777 | journald_crash ? "\nCoredump diverted to " : "", | |
778 | journald_crash ? filename : "", | |
779 | "\n\n", stacktrace); | |
3c171f0b LP |
780 | else if (r == -EINVAL) |
781 | log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); | |
782 | else | |
783 | log_warning_errno(r, "Failed to generate stack trace: %m"); | |
6e9ef603 | 784 | } else |
5206a724 | 785 | log_debug("Not generating stack trace: core size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 786 | coredump_size, arg_process_size_max); |
803a3464 | 787 | |
3c171f0b LP |
788 | if (!core_message) |
789 | #endif | |
790 | log: | |
92e92d71 ZJS |
791 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
792 | " (", context[CONTEXT_COMM], ") of user ", | |
793 | context[CONTEXT_UID], " dumped core.", | |
794 | journald_crash ? "\nCoredump diverted to " : NULL, | |
795 | journald_crash ? filename : NULL); | |
796 | if (!core_message) | |
797 | return log_oom(); | |
798 | ||
799 | if (journald_crash) { | |
800 | /* We cannot log to the journal, so just print the MESSAGE. | |
801 | * The target was set previously to something safe. */ | |
ae2173d6 | 802 | log_dispatch(LOG_ERR, 0, core_message); |
92e92d71 ZJS |
803 | return 0; |
804 | } | |
805 | ||
e6a7ec4b | 806 | iovec[n_iovec++] = IOVEC_MAKE_STRING(core_message); |
3c171f0b | 807 | |
0cd4e913 | 808 | if (truncated) |
e6a7ec4b | 809 | iovec[n_iovec++] = IOVEC_MAKE_STRING("COREDUMP_TRUNCATED=1"); |
0cd4e913 | 810 | |
3c171f0b | 811 | /* Optionally store the entire coredump in the journal */ |
6e9ef603 ZJS |
812 | if (arg_storage == COREDUMP_STORAGE_JOURNAL) { |
813 | if (coredump_size <= arg_journal_size_max) { | |
814 | size_t sz = 0; | |
815 | ||
816 | /* Store the coredump itself in the journal */ | |
817 | ||
818 | r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); | |
e6a7ec4b LP |
819 | if (r >= 0) |
820 | iovec[n_iovec++] = IOVEC_MAKE(coredump_data, sz); | |
821 | else | |
6e9ef603 ZJS |
822 | log_warning_errno(r, "Failed to attach the core to the journal entry: %m"); |
823 | } else | |
5206a724 | 824 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 825 | coredump_size, arg_journal_size_max); |
f5e04665 LP |
826 | } |
827 | ||
3c171f0b LP |
828 | assert(n_iovec <= n_iovec_allocated); |
829 | ||
830 | r = sd_journal_sendv(iovec, n_iovec); | |
831 | if (r < 0) | |
832 | return log_error_errno(r, "Failed to log coredump: %m"); | |
833 | ||
834 | return 0; | |
835 | } | |
836 | ||
ea5cc2a8 | 837 | static void map_context_fields(const struct iovec *iovec, const char* context[]) { |
3c171f0b | 838 | |
92e92d71 | 839 | static const char * const context_field_names[] = { |
3c171f0b LP |
840 | [CONTEXT_PID] = "COREDUMP_PID=", |
841 | [CONTEXT_UID] = "COREDUMP_UID=", | |
842 | [CONTEXT_GID] = "COREDUMP_GID=", | |
843 | [CONTEXT_SIGNAL] = "COREDUMP_SIGNAL=", | |
844 | [CONTEXT_TIMESTAMP] = "COREDUMP_TIMESTAMP=", | |
92e92d71 | 845 | [CONTEXT_RLIMIT] = "COREDUMP_RLIMIT=", |
f45b8015 | 846 | [CONTEXT_HOSTNAME] = "COREDUMP_HOSTNAME=", |
3c171f0b LP |
847 | [CONTEXT_COMM] = "COREDUMP_COMM=", |
848 | [CONTEXT_EXE] = "COREDUMP_EXE=", | |
849 | }; | |
850 | ||
851 | unsigned i; | |
852 | ||
853 | assert(iovec); | |
854 | assert(context); | |
855 | ||
92e92d71 | 856 | for (i = 0; i < ELEMENTSOF(context_field_names); i++) { |
3c171f0b LP |
857 | size_t l; |
858 | ||
92e92d71 ZJS |
859 | if (!context_field_names[i]) |
860 | continue; | |
861 | ||
3c171f0b LP |
862 | l = strlen(context_field_names[i]); |
863 | if (iovec->iov_len < l) | |
864 | continue; | |
865 | ||
866 | if (memcmp(iovec->iov_base, context_field_names[i], l) != 0) | |
867 | continue; | |
868 | ||
869 | /* Note that these strings are NUL terminated, because we made sure that a trailing NUL byte is in the | |
870 | * buffer, though not included in the iov_len count. (see below) */ | |
871 | context[i] = (char*) iovec->iov_base + l; | |
872 | break; | |
873 | } | |
874 | } | |
875 | ||
876 | static int process_socket(int fd) { | |
877 | _cleanup_close_ int coredump_fd = -1; | |
878 | struct iovec *iovec = NULL; | |
80002f66 | 879 | size_t n_iovec = 0, n_allocated = 0, i, k; |
3c171f0b LP |
880 | const char *context[_CONTEXT_MAX] = {}; |
881 | int r; | |
882 | ||
883 | assert(fd >= 0); | |
884 | ||
885 | log_set_target(LOG_TARGET_AUTO); | |
886 | log_parse_environment(); | |
887 | log_open(); | |
888 | ||
988e89ee ZJS |
889 | log_debug("Processing coredump received on stdin..."); |
890 | ||
3c171f0b LP |
891 | for (;;) { |
892 | union { | |
893 | struct cmsghdr cmsghdr; | |
894 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
895 | } control = {}; | |
896 | struct msghdr mh = { | |
897 | .msg_control = &control, | |
898 | .msg_controllen = sizeof(control), | |
899 | .msg_iovlen = 1, | |
900 | }; | |
901 | ssize_t n; | |
fe1ef0f8 | 902 | ssize_t l; |
3c171f0b | 903 | |
0cd4e913 | 904 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + SUBMIT_COREDUMP_FIELDS)) { |
3c171f0b LP |
905 | r = log_oom(); |
906 | goto finish; | |
907 | } | |
908 | ||
fe1ef0f8 EV |
909 | l = next_datagram_size_fd(fd); |
910 | if (l < 0) { | |
911 | r = log_error_errno(l, "Failed to determine datagram size to read: %m"); | |
3c171f0b LP |
912 | goto finish; |
913 | } | |
914 | ||
915 | assert(l >= 0); | |
916 | ||
917 | iovec[n_iovec].iov_len = l; | |
918 | iovec[n_iovec].iov_base = malloc(l + 1); | |
3c171f0b LP |
919 | if (!iovec[n_iovec].iov_base) { |
920 | r = log_oom(); | |
921 | goto finish; | |
922 | } | |
923 | ||
924 | mh.msg_iov = iovec + n_iovec; | |
925 | ||
926 | n = recvmsg(fd, &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC); | |
927 | if (n < 0) { | |
928 | free(iovec[n_iovec].iov_base); | |
929 | r = log_error_errno(errno, "Failed to receive datagram: %m"); | |
930 | goto finish; | |
931 | } | |
932 | ||
933 | if (n == 0) { | |
934 | struct cmsghdr *cmsg, *found = NULL; | |
935 | /* The final zero-length datagram carries the file descriptor and tells us that we're done. */ | |
936 | ||
937 | free(iovec[n_iovec].iov_base); | |
938 | ||
939 | CMSG_FOREACH(cmsg, &mh) { | |
940 | if (cmsg->cmsg_level == SOL_SOCKET && | |
941 | cmsg->cmsg_type == SCM_RIGHTS && | |
942 | cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
943 | assert(!found); | |
944 | found = cmsg; | |
945 | } | |
946 | } | |
947 | ||
948 | if (!found) { | |
949 | log_error("Coredump file descriptor missing."); | |
950 | r = -EBADMSG; | |
951 | goto finish; | |
952 | } | |
953 | ||
954 | assert(coredump_fd < 0); | |
955 | coredump_fd = *(int*) CMSG_DATA(found); | |
956 | break; | |
957 | } | |
958 | ||
959 | /* Add trailing NUL byte, in case these are strings */ | |
960 | ((char*) iovec[n_iovec].iov_base)[n] = 0; | |
961 | iovec[n_iovec].iov_len = (size_t) n; | |
962 | ||
963 | cmsg_close_all(&mh); | |
964 | map_context_fields(iovec + n_iovec, context); | |
965 | n_iovec++; | |
966 | } | |
967 | ||
0cd4e913 | 968 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + SUBMIT_COREDUMP_FIELDS)) { |
3c171f0b | 969 | r = log_oom(); |
34c10968 LP |
970 | goto finish; |
971 | } | |
972 | ||
61233823 | 973 | /* Make sure we got all data we really need */ |
3c171f0b LP |
974 | assert(context[CONTEXT_PID]); |
975 | assert(context[CONTEXT_UID]); | |
976 | assert(context[CONTEXT_GID]); | |
977 | assert(context[CONTEXT_SIGNAL]); | |
978 | assert(context[CONTEXT_TIMESTAMP]); | |
bdfd7b2c | 979 | assert(context[CONTEXT_RLIMIT]); |
f45b8015 | 980 | assert(context[CONTEXT_HOSTNAME]); |
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 | |
f45b8015 | 1067 | static char* set_iovec_field(struct iovec *iovec, size_t *n_iovec, const char *field, const char *value) { |
9aa82023 | 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 | |
f45b8015 | 1076 | static char* set_iovec_field_free(struct iovec *iovec, size_t *n_iovec, const char *field, char *value) { |
9aa82023 ZJS |
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 | 1088 | |
f45b8015 | 1089 | /* We need 27 empty slots in iovec! |
d14bcb4e LP |
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 | 1125 | log_notice("Due to PID 1 having crashed coredump collection will now be turned off."); |
e557b1a6 | 1126 | disable_coredumps(); |
c8091d92 LP |
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 | |
f45b8015 JF |
1151 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_HOSTNAME=", context[CONTEXT_HOSTNAME])) |
1152 | return log_oom(); | |
1153 | ||
ea5cc2a8 | 1154 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_COMM=", context[CONTEXT_COMM])) |
9aa82023 | 1155 | return log_oom(); |
bdfd7b2c | 1156 | |
ea5cc2a8 ZJS |
1157 | if (context[CONTEXT_EXE] && |
1158 | !set_iovec_field(iovec, n_iovec, "COREDUMP_EXE=", context[CONTEXT_EXE])) | |
9aa82023 | 1159 | return log_oom(); |
f5e04665 | 1160 | |
9aa82023 ZJS |
1161 | if (sd_pid_get_session(pid, &t) >= 0) |
1162 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SESSION=", t); | |
f5e04665 | 1163 | |
a035f819 | 1164 | if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { |
9aa82023 | 1165 | r = asprintf(&t, "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); |
7de80bfe | 1166 | if (r > 0) |
e6a7ec4b | 1167 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); |
f5e04665 LP |
1168 | } |
1169 | ||
9aa82023 ZJS |
1170 | if (sd_pid_get_slice(pid, &t) >= 0) |
1171 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SLICE=", t); | |
f5e04665 | 1172 | |
9aa82023 ZJS |
1173 | if (get_process_cmdline(pid, 0, false, &t) >= 0) |
1174 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CMDLINE=", t); | |
a035f819 | 1175 | |
9aa82023 ZJS |
1176 | if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) |
1177 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CGROUP=", t); | |
a035f819 | 1178 | |
9aa82023 ZJS |
1179 | if (compose_open_fds(pid, &t) >= 0) |
1180 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_OPEN_FDS=", t); | |
3f132692 JF |
1181 | |
1182 | p = procfs_file_alloca(pid, "status"); | |
9aa82023 ZJS |
1183 | if (read_full_file(p, &t, NULL) >= 0) |
1184 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_STATUS=", t); | |
3f132692 JF |
1185 | |
1186 | p = procfs_file_alloca(pid, "maps"); | |
9aa82023 ZJS |
1187 | if (read_full_file(p, &t, NULL) >= 0) |
1188 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MAPS=", t); | |
3f132692 JF |
1189 | |
1190 | p = procfs_file_alloca(pid, "limits"); | |
9aa82023 ZJS |
1191 | if (read_full_file(p, &t, NULL) >= 0) |
1192 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_LIMITS=", t); | |
3f132692 JF |
1193 | |
1194 | p = procfs_file_alloca(pid, "cgroup"); | |
9aa82023 ZJS |
1195 | if (read_full_file(p, &t, NULL) >=0) |
1196 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_CGROUP=", t); | |
3f132692 | 1197 | |
d7032b1f | 1198 | p = procfs_file_alloca(pid, "mountinfo"); |
9aa82023 ZJS |
1199 | if (read_full_file(p, &t, NULL) >=0) |
1200 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MOUNTINFO=", t); | |
d7032b1f | 1201 | |
9aa82023 ZJS |
1202 | if (get_process_cwd(pid, &t) >= 0) |
1203 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CWD=", t); | |
3f132692 JF |
1204 | |
1205 | if (get_process_root(pid, &t) >= 0) { | |
9aa82023 ZJS |
1206 | bool proc_self_root_is_slash; |
1207 | ||
1208 | proc_self_root_is_slash = strcmp(t, "/") == 0; | |
3f132692 | 1209 | |
9aa82023 | 1210 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ROOT=", t); |
7ed03ce6 JF |
1211 | |
1212 | /* If the process' root is "/", then there is a chance it has | |
1213 | * mounted own root and hence being containerized. */ | |
9aa82023 ZJS |
1214 | if (proc_self_root_is_slash && get_process_container_parent_cmdline(pid, &t) > 0) |
1215 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CONTAINER_CMDLINE=", t); | |
3f132692 JF |
1216 | } |
1217 | ||
9aa82023 ZJS |
1218 | if (get_process_environ(pid, &t) >= 0) |
1219 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ENVIRON=", t); | |
1220 | ||
4600a396 | 1221 | t = strjoin("COREDUMP_TIMESTAMP=", context[CONTEXT_TIMESTAMP], "000000"); |
9aa82023 | 1222 | if (t) |
e6a7ec4b | 1223 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); |
9aa82023 | 1224 | |
d14bcb4e LP |
1225 | if (safe_atoi(context[CONTEXT_SIGNAL], &signo) >= 0 && SIGNAL_VALID(signo)) |
1226 | set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL_NAME=SIG", signal_to_string(signo)); | |
1227 | ||
92e92d71 | 1228 | return 0; /* we successfully acquired all metadata */ |
9aa82023 | 1229 | } |
3f132692 | 1230 | |
9aa82023 ZJS |
1231 | static int process_kernel(int argc, char* argv[]) { |
1232 | ||
ea5cc2a8 | 1233 | char* context[_CONTEXT_MAX] = {}; |
f45b8015 | 1234 | struct iovec iovec[29 + SUBMIT_COREDUMP_FIELDS]; |
988e89ee | 1235 | size_t i, n_iovec, n_to_free = 0; |
9aa82023 ZJS |
1236 | int r; |
1237 | ||
988e89ee ZJS |
1238 | log_debug("Processing coredump received from the kernel..."); |
1239 | ||
9aa82023 | 1240 | if (argc < CONTEXT_COMM + 1) { |
988e89ee | 1241 | log_error("Not enough arguments passed by the kernel (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); |
9aa82023 | 1242 | return -EINVAL; |
3f132692 JF |
1243 | } |
1244 | ||
ea5cc2a8 ZJS |
1245 | context[CONTEXT_PID] = argv[1 + CONTEXT_PID]; |
1246 | context[CONTEXT_UID] = argv[1 + CONTEXT_UID]; | |
1247 | context[CONTEXT_GID] = argv[1 + CONTEXT_GID]; | |
1248 | context[CONTEXT_SIGNAL] = argv[1 + CONTEXT_SIGNAL]; | |
1249 | context[CONTEXT_TIMESTAMP] = argv[1 + CONTEXT_TIMESTAMP]; | |
1250 | context[CONTEXT_RLIMIT] = argv[1 + CONTEXT_RLIMIT]; | |
f45b8015 | 1251 | context[CONTEXT_HOSTNAME] = argv[1 + CONTEXT_HOSTNAME]; |
9aa82023 | 1252 | |
92e92d71 ZJS |
1253 | r = gather_pid_metadata(context, argv + 1 + CONTEXT_COMM, iovec, &n_to_free); |
1254 | if (r < 0) | |
86562420 | 1255 | goto finish; |
86562420 | 1256 | |
988e89ee | 1257 | n_iovec = n_to_free; |
f5e04665 | 1258 | |
e6a7ec4b | 1259 | iovec[n_iovec++] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR); |
4850d39a LP |
1260 | |
1261 | assert_cc(2 == LOG_CRIT); | |
e6a7ec4b | 1262 | iovec[n_iovec++] = IOVEC_MAKE_STRING("PRIORITY=2"); |
0dc5d23c | 1263 | |
3c171f0b | 1264 | assert(n_iovec <= ELEMENTSOF(iovec)); |
34c10968 | 1265 | |
b8cda92d | 1266 | if (is_journald_crash((const char**) context) || is_pid1_crash((const char**) context)) |
92e92d71 ZJS |
1267 | r = submit_coredump((const char**) context, |
1268 | iovec, ELEMENTSOF(iovec), n_iovec, | |
1269 | STDIN_FILENO); | |
1270 | else | |
1271 | r = send_iovec(iovec, n_iovec, STDIN_FILENO); | |
9aa82023 ZJS |
1272 | |
1273 | finish: | |
1274 | for (i = 0; i < n_to_free; i++) | |
1275 | free(iovec[i].iov_base); | |
1276 | ||
92e92d71 | 1277 | /* Those fields are allocated by gather_pid_metadata */ |
ea5cc2a8 ZJS |
1278 | free(context[CONTEXT_COMM]); |
1279 | free(context[CONTEXT_EXE]); | |
92e92d71 | 1280 | free(context[CONTEXT_UNIT]); |
ea5cc2a8 | 1281 | |
9aa82023 | 1282 | return r; |
3c171f0b | 1283 | } |
34c10968 | 1284 | |
988e89ee | 1285 | static int process_backtrace(int argc, char *argv[]) { |
ea5cc2a8 ZJS |
1286 | char *context[_CONTEXT_MAX] = {}; |
1287 | _cleanup_free_ char *message = NULL; | |
5b45a160 ZJS |
1288 | _cleanup_free_ struct iovec *iovec = NULL; |
1289 | size_t n_iovec, n_allocated, n_to_free = 0, i; | |
988e89ee | 1290 | int r; |
5b45a160 ZJS |
1291 | JournalImporter importer = { |
1292 | .fd = STDIN_FILENO, | |
1293 | }; | |
988e89ee ZJS |
1294 | |
1295 | log_debug("Processing backtrace on stdin..."); | |
1296 | ||
1297 | if (argc < CONTEXT_COMM + 1) { | |
1298 | log_error("Not enough arguments passed (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); | |
1299 | return -EINVAL; | |
1300 | } | |
1301 | ||
ea5cc2a8 ZJS |
1302 | context[CONTEXT_PID] = argv[2 + CONTEXT_PID]; |
1303 | context[CONTEXT_UID] = argv[2 + CONTEXT_UID]; | |
1304 | context[CONTEXT_GID] = argv[2 + CONTEXT_GID]; | |
1305 | context[CONTEXT_SIGNAL] = argv[2 + CONTEXT_SIGNAL]; | |
1306 | context[CONTEXT_TIMESTAMP] = argv[2 + CONTEXT_TIMESTAMP]; | |
1307 | context[CONTEXT_RLIMIT] = argv[2 + CONTEXT_RLIMIT]; | |
f45b8015 | 1308 | context[CONTEXT_HOSTNAME] = argv[2 + CONTEXT_HOSTNAME]; |
988e89ee | 1309 | |
f45b8015 JF |
1310 | n_allocated = 34 + COREDUMP_STORAGE_EXTERNAL; |
1311 | /* 26 metadata, 2 static, +unknown input, 4 storage, rounded up */ | |
5b45a160 ZJS |
1312 | iovec = new(struct iovec, n_allocated); |
1313 | if (!iovec) | |
1314 | return log_oom(); | |
1315 | ||
92e92d71 | 1316 | r = gather_pid_metadata(context, argv + 2 + CONTEXT_COMM, iovec, &n_to_free); |
988e89ee ZJS |
1317 | if (r < 0) |
1318 | goto finish; | |
86562420 LP |
1319 | if (r > 0) { |
1320 | /* This was a special crash, and has already been processed. */ | |
1321 | r = 0; | |
1322 | goto finish; | |
1323 | } | |
5b45a160 | 1324 | n_iovec = n_to_free; |
988e89ee | 1325 | |
86562420 | 1326 | for (;;) { |
5b45a160 ZJS |
1327 | r = journal_importer_process_data(&importer); |
1328 | if (r < 0) { | |
1329 | log_error_errno(r, "Failed to parse journal entry on stdin: %m"); | |
1330 | goto finish; | |
1331 | } | |
d74dc4f2 ZJS |
1332 | if (r == 1 || /* complete entry */ |
1333 | journal_importer_eof(&importer)) /* end of data */ | |
5b45a160 | 1334 | break; |
988e89ee | 1335 | } |
988e89ee | 1336 | |
5b45a160 ZJS |
1337 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + importer.iovw.count + 2)) |
1338 | return log_oom(); | |
1339 | ||
1340 | if (journal_importer_eof(&importer)) { | |
1341 | log_warning("Did not receive a full journal entry on stdin, ignoring message sent by reporter"); | |
988e89ee | 1342 | |
ea5cc2a8 ZJS |
1343 | message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
1344 | " (", context[CONTEXT_COMM], ")" | |
5b45a160 ZJS |
1345 | " of user ", context[CONTEXT_UID], |
1346 | " failed with ", context[CONTEXT_SIGNAL]); | |
1347 | if (!message) { | |
1348 | r = log_oom(); | |
1349 | goto finish; | |
1350 | } | |
e6a7ec4b | 1351 | iovec[n_iovec++] = IOVEC_MAKE_STRING(message); |
5b45a160 ZJS |
1352 | } else { |
1353 | for (i = 0; i < importer.iovw.count; i++) | |
1354 | iovec[n_iovec++] = importer.iovw.iovec[i]; | |
1355 | } | |
988e89ee | 1356 | |
e6a7ec4b | 1357 | iovec[n_iovec++] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR); |
988e89ee | 1358 | assert_cc(2 == LOG_CRIT); |
e6a7ec4b | 1359 | iovec[n_iovec++] = IOVEC_MAKE_STRING("PRIORITY=2"); |
988e89ee | 1360 | |
5b45a160 | 1361 | assert(n_iovec <= n_allocated); |
988e89ee ZJS |
1362 | |
1363 | r = sd_journal_sendv(iovec, n_iovec); | |
1364 | if (r < 0) | |
1365 | log_error_errno(r, "Failed to log backtrace: %m"); | |
1366 | ||
1367 | finish: | |
1368 | for (i = 0; i < n_to_free; i++) | |
1369 | free(iovec[i].iov_base); | |
1370 | ||
92e92d71 | 1371 | /* Those fields are allocated by gather_pid_metadata */ |
ea5cc2a8 ZJS |
1372 | free(context[CONTEXT_COMM]); |
1373 | free(context[CONTEXT_EXE]); | |
92e92d71 | 1374 | free(context[CONTEXT_UNIT]); |
ea5cc2a8 | 1375 | |
988e89ee ZJS |
1376 | return r; |
1377 | } | |
1378 | ||
3c171f0b LP |
1379 | int main(int argc, char *argv[]) { |
1380 | int r; | |
fee80f69 | 1381 | |
9aa82023 ZJS |
1382 | /* First, log to a safe place, since we don't know what crashed and it might |
1383 | * be journald which we'd rather not log to then. */ | |
8d4e028f | 1384 | |
3c171f0b LP |
1385 | log_set_target(LOG_TARGET_KMSG); |
1386 | log_open(); | |
8d4e028f | 1387 | |
3c171f0b LP |
1388 | /* Make sure we never enter a loop */ |
1389 | (void) prctl(PR_SET_DUMPABLE, 0); | |
8d4e028f | 1390 | |
3c171f0b LP |
1391 | /* Ignore all parse errors */ |
1392 | (void) parse_config(); | |
fee80f69 | 1393 | |
3c171f0b LP |
1394 | log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); |
1395 | log_debug("Selected compression %s.", yes_no(arg_compress)); | |
fee80f69 | 1396 | |
3c171f0b LP |
1397 | r = sd_listen_fds(false); |
1398 | if (r < 0) { | |
1399 | log_error_errno(r, "Failed to determine number of file descriptor: %m"); | |
1400 | goto finish; | |
fee80f69 LP |
1401 | } |
1402 | ||
9aa82023 ZJS |
1403 | /* If we got an fd passed, we are running in coredumpd mode. Otherwise we |
1404 | * are invoked from the kernel as coredump handler. */ | |
988e89ee ZJS |
1405 | if (r == 0) { |
1406 | if (streq_ptr(argv[1], "--backtrace")) | |
1407 | r = process_backtrace(argc, argv); | |
1408 | else | |
1409 | r = process_kernel(argc, argv); | |
1410 | } else if (r == 1) | |
3c171f0b LP |
1411 | r = process_socket(SD_LISTEN_FDS_START); |
1412 | else { | |
1413 | log_error("Received unexpected number of file descriptors."); | |
1414 | r = -EINVAL; | |
1415 | } | |
f5e04665 LP |
1416 | |
1417 | finish: | |
f5e04665 LP |
1418 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
1419 | } |