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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 | |
f5e04665 LP |
6 | ***/ |
7 | ||
8 | #include <errno.h> | |
803a3464 | 9 | #include <stdio.h> |
0d536673 | 10 | #include <stdio_ext.h> |
803a3464 | 11 | #include <sys/prctl.h> |
cacd6403 | 12 | #include <sys/xattr.h> |
4f5dd394 | 13 | #include <unistd.h> |
f5e04665 | 14 | |
349cc4a5 | 15 | #if HAVE_ELFUTILS |
3c171f0b LP |
16 | #include <dwarf.h> |
17 | #include <elfutils/libdwfl.h> | |
4d229b31 UTL |
18 | #endif |
19 | ||
73a99163 | 20 | #include "sd-daemon.h" |
f11943c5 LP |
21 | #include "sd-journal.h" |
22 | #include "sd-login.h" | |
73a99163 | 23 | #include "sd-messages.h" |
4f5dd394 LP |
24 | |
25 | #include "acl-util.h" | |
b5efdb8a | 26 | #include "alloc-util.h" |
430f0182 | 27 | #include "capability-util.h" |
ba1261bc | 28 | #include "cgroup-util.h" |
4f5dd394 | 29 | #include "compress.h" |
34c10968 LP |
30 | #include "conf-parser.h" |
31 | #include "copy.h" | |
f11943c5 | 32 | #include "coredump-vacuum.h" |
a0956174 | 33 | #include "dirent-util.h" |
4f5dd394 | 34 | #include "escape.h" |
3ffd4af2 | 35 | #include "fd-util.h" |
4f5dd394 | 36 | #include "fileio.h" |
f4f15635 | 37 | #include "fs-util.h" |
afc5dbf3 | 38 | #include "io-util.h" |
b18453ed | 39 | #include "journal-importer.h" |
4f5dd394 LP |
40 | #include "log.h" |
41 | #include "macro.h" | |
0c773903 | 42 | #include "missing.h" |
4f5dd394 | 43 | #include "mkdir.h" |
6bedfcbb | 44 | #include "parse-util.h" |
0b452006 | 45 | #include "process-util.h" |
d14bcb4e | 46 | #include "signal-util.h" |
3c171f0b | 47 | #include "socket-util.h" |
4f5dd394 LP |
48 | #include "special.h" |
49 | #include "stacktrace.h" | |
8b43440b | 50 | #include "string-table.h" |
07630cea | 51 | #include "string-util.h" |
4f5dd394 | 52 | #include "strv.h" |
b1d4f8e1 | 53 | #include "user-util.h" |
4f5dd394 | 54 | #include "util.h" |
34727273 | 55 | |
34c10968 | 56 | /* The maximum size up to which we process coredumps */ |
59f448cf | 57 | #define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU)) |
34c10968 | 58 | |
bdfd7b2c | 59 | /* The maximum size up to which we leave the coredump around on disk */ |
34c10968 LP |
60 | #define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX |
61 | ||
bdfd7b2c | 62 | /* The maximum size up to which we store the coredump in the journal */ |
34c10968 | 63 | #define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU)) |
f5e04665 | 64 | |
c4aa09b0 | 65 | /* Make sure to not make this larger than the maximum journal entry |
874bc134 ZJS |
66 | * size. See DATA_SIZE_MAX in journald-native.c. */ |
67 | assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX); | |
f5e04665 LP |
68 | |
69 | enum { | |
ea5cc2a8 ZJS |
70 | /* We use this as array indexes for a couple of special fields we use for |
71 | * naming coredump files, and attaching xattrs, and for indexing argv[]. | |
72 | ||
73 | * Our pattern for man:systectl(1) kernel.core_pattern is such that the | |
74 | * kernel passes fields until CONTEXT_RLIMIT as arguments in argv[]. After | |
75 | * that it gets complicated: the kernel passes "comm" as one or more fields | |
76 | * starting at index CONTEXT_COMM (in other words, full "comm" is under index | |
77 | * CONTEXT_COMM when it does not contain spaces, which is the common | |
78 | * case). This mapping is not reversible, so we prefer to retrieve "comm" | |
79 | * from /proc. We only fall back to argv[CONTEXT_COMM...] when that fails. | |
80 | * | |
81 | * In the internal context[] array, fields before CONTEXT_COMM are the | |
82 | * strings from argv[], so they should not be freed. The strings at indices | |
83 | * CONTEXT_COMM and higher are allocated by us and should be freed at the | |
84 | * end. | |
85 | */ | |
3c171f0b LP |
86 | CONTEXT_PID, |
87 | CONTEXT_UID, | |
88 | CONTEXT_GID, | |
89 | CONTEXT_SIGNAL, | |
90 | CONTEXT_TIMESTAMP, | |
bdfd7b2c | 91 | CONTEXT_RLIMIT, |
f45b8015 | 92 | CONTEXT_HOSTNAME, |
3c171f0b LP |
93 | CONTEXT_COMM, |
94 | CONTEXT_EXE, | |
92e92d71 | 95 | CONTEXT_UNIT, |
3c171f0b | 96 | _CONTEXT_MAX |
f5e04665 LP |
97 | }; |
98 | ||
34c10968 LP |
99 | typedef enum CoredumpStorage { |
100 | COREDUMP_STORAGE_NONE, | |
101 | COREDUMP_STORAGE_EXTERNAL, | |
102 | COREDUMP_STORAGE_JOURNAL, | |
34c10968 LP |
103 | _COREDUMP_STORAGE_MAX, |
104 | _COREDUMP_STORAGE_INVALID = -1 | |
105 | } CoredumpStorage; | |
106 | ||
34c10968 LP |
107 | static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = { |
108 | [COREDUMP_STORAGE_NONE] = "none", | |
109 | [COREDUMP_STORAGE_EXTERNAL] = "external", | |
110 | [COREDUMP_STORAGE_JOURNAL] = "journal", | |
34c10968 LP |
111 | }; |
112 | ||
113 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage); | |
8c9571d0 | 114 | static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting"); |
34727273 ZJS |
115 | |
116 | static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL; | |
8c9571d0 | 117 | static bool arg_compress = true; |
59f448cf LP |
118 | static uint64_t arg_process_size_max = PROCESS_SIZE_MAX; |
119 | static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX; | |
6e2b4a69 | 120 | static uint64_t arg_journal_size_max = JOURNAL_SIZE_MAX; |
59f448cf LP |
121 | static uint64_t arg_keep_free = (uint64_t) -1; |
122 | static uint64_t arg_max_use = (uint64_t) -1; | |
34c10968 LP |
123 | |
124 | static int parse_config(void) { | |
34c10968 | 125 | static const ConfigTableItem items[] = { |
8c9571d0 LP |
126 | { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage }, |
127 | { "Coredump", "Compress", config_parse_bool, 0, &arg_compress }, | |
59f448cf LP |
128 | { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max }, |
129 | { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max }, | |
8c9571d0 | 130 | { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max }, |
59f448cf LP |
131 | { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free }, |
132 | { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use }, | |
34c10968 LP |
133 | {} |
134 | }; | |
135 | ||
43688c49 | 136 | return config_parse_many_nulstr(PKGSYSCONFDIR "/coredump.conf", |
da412854 YW |
137 | CONF_PATHS_NULSTR("systemd/coredump.conf.d"), |
138 | "Coredump\0", | |
139 | config_item_table_lookup, items, | |
bcde742e | 140 | CONFIG_PARSE_WARN, NULL); |
34c10968 LP |
141 | } |
142 | ||
73a99163 | 143 | static inline uint64_t storage_size_max(void) { |
ee0449fd ZJS |
144 | if (arg_storage == COREDUMP_STORAGE_EXTERNAL) |
145 | return arg_external_size_max; | |
146 | if (arg_storage == COREDUMP_STORAGE_JOURNAL) | |
147 | return arg_journal_size_max; | |
148 | assert(arg_storage == COREDUMP_STORAGE_NONE); | |
149 | return 0; | |
73a99163 ZJS |
150 | } |
151 | ||
34c10968 LP |
152 | static int fix_acl(int fd, uid_t uid) { |
153 | ||
349cc4a5 | 154 | #if HAVE_ACL |
34c10968 LP |
155 | _cleanup_(acl_freep) acl_t acl = NULL; |
156 | acl_entry_t entry; | |
157 | acl_permset_t permset; | |
709f6e46 | 158 | int r; |
34c10968 | 159 | |
b59233e6 LP |
160 | assert(fd >= 0); |
161 | ||
05fd2156 | 162 | if (uid_is_system(uid) || uid_is_dynamic(uid) || uid == UID_NOBODY) |
34c10968 LP |
163 | return 0; |
164 | ||
165 | /* Make sure normal users can read (but not write or delete) | |
166 | * their own coredumps */ | |
167 | ||
168 | acl = acl_get_fd(fd); | |
4a62c710 MS |
169 | if (!acl) |
170 | return log_error_errno(errno, "Failed to get ACL: %m"); | |
34c10968 LP |
171 | |
172 | if (acl_create_entry(&acl, &entry) < 0 || | |
173 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
d710aaf7 ZJS |
174 | acl_set_qualifier(entry, &uid) < 0) |
175 | return log_error_errno(errno, "Failed to patch ACL: %m"); | |
34c10968 LP |
176 | |
177 | if (acl_get_permset(entry, &permset) < 0 || | |
709f6e46 MS |
178 | acl_add_perm(permset, ACL_READ) < 0) |
179 | return log_warning_errno(errno, "Failed to patch ACL: %m"); | |
180 | ||
181 | r = calc_acl_mask_if_needed(&acl); | |
182 | if (r < 0) | |
183 | return log_warning_errno(r, "Failed to patch ACL: %m"); | |
34c10968 | 184 | |
4a62c710 MS |
185 | if (acl_set_fd(fd, acl) < 0) |
186 | return log_error_errno(errno, "Failed to apply ACL: %m"); | |
34c10968 LP |
187 | #endif |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
3c171f0b | 192 | static int fix_xattr(int fd, const char *context[_CONTEXT_MAX]) { |
0cd77f97 | 193 | |
3c171f0b LP |
194 | static const char * const xattrs[_CONTEXT_MAX] = { |
195 | [CONTEXT_PID] = "user.coredump.pid", | |
196 | [CONTEXT_UID] = "user.coredump.uid", | |
197 | [CONTEXT_GID] = "user.coredump.gid", | |
198 | [CONTEXT_SIGNAL] = "user.coredump.signal", | |
199 | [CONTEXT_TIMESTAMP] = "user.coredump.timestamp", | |
6d337300 | 200 | [CONTEXT_RLIMIT] = "user.coredump.rlimit", |
f45b8015 | 201 | [CONTEXT_HOSTNAME] = "user.coredump.hostname", |
3c171f0b LP |
202 | [CONTEXT_COMM] = "user.coredump.comm", |
203 | [CONTEXT_EXE] = "user.coredump.exe", | |
0cd77f97 LP |
204 | }; |
205 | ||
34c10968 | 206 | int r = 0; |
0cd77f97 | 207 | unsigned i; |
34c10968 | 208 | |
b59233e6 LP |
209 | assert(fd >= 0); |
210 | ||
1eef15b1 | 211 | /* Attach some metadata to coredumps via extended |
34c10968 LP |
212 | * attributes. Just because we can. */ |
213 | ||
3c171f0b | 214 | for (i = 0; i < _CONTEXT_MAX; i++) { |
1eef15b1 ZJS |
215 | int k; |
216 | ||
3c171f0b | 217 | if (isempty(context[i]) || !xattrs[i]) |
0cd77f97 | 218 | continue; |
34c10968 | 219 | |
3c171f0b | 220 | k = fsetxattr(fd, xattrs[i], context[i], strlen(context[i]), XATTR_CREATE); |
1eef15b1 | 221 | if (k < 0 && r == 0) |
34c10968 | 222 | r = -errno; |
0cd77f97 | 223 | } |
34c10968 LP |
224 | |
225 | return r; | |
226 | } | |
227 | ||
b0b21dce | 228 | #define filename_escape(s) xescape((s), "./ ") |
34c10968 | 229 | |
0c773903 EV |
230 | static inline const char *coredump_tmpfile_name(const char *s) { |
231 | return s ? s : "(unnamed temporary file)"; | |
232 | } | |
233 | ||
b59233e6 LP |
234 | static int fix_permissions( |
235 | int fd, | |
236 | const char *filename, | |
237 | const char *target, | |
3c171f0b | 238 | const char *context[_CONTEXT_MAX], |
b59233e6 LP |
239 | uid_t uid) { |
240 | ||
03532f0a LP |
241 | int r; |
242 | ||
b59233e6 | 243 | assert(fd >= 0); |
b59233e6 | 244 | assert(target); |
3c171f0b | 245 | assert(context); |
cfd652ed ZJS |
246 | |
247 | /* Ignore errors on these */ | |
3c171f0b LP |
248 | (void) fchmod(fd, 0640); |
249 | (void) fix_acl(fd, uid); | |
250 | (void) fix_xattr(fd, context); | |
cfd652ed | 251 | |
4a62c710 | 252 | if (fsync(fd) < 0) |
0c773903 | 253 | return log_error_errno(errno, "Failed to sync coredump %s: %m", coredump_tmpfile_name(filename)); |
cfd652ed | 254 | |
8ac2f74f LP |
255 | (void) fsync_directory_of_file(fd); |
256 | ||
03532f0a LP |
257 | r = link_tmpfile(fd, filename, target); |
258 | if (r < 0) | |
259 | return log_error_errno(r, "Failed to move coredump %s into place: %m", target); | |
cfd652ed ZJS |
260 | |
261 | return 0; | |
262 | } | |
263 | ||
59f448cf | 264 | static int maybe_remove_external_coredump(const char *filename, uint64_t size) { |
cfd652ed | 265 | |
b59233e6 | 266 | /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */ |
cfd652ed | 267 | |
fc6cec86 | 268 | if (arg_storage == COREDUMP_STORAGE_EXTERNAL && |
cfd652ed ZJS |
269 | size <= arg_external_size_max) |
270 | return 0; | |
271 | ||
272 | if (!filename) | |
273 | return 1; | |
274 | ||
4a62c710 MS |
275 | if (unlink(filename) < 0 && errno != ENOENT) |
276 | return log_error_errno(errno, "Failed to unlink %s: %m", filename); | |
cfd652ed ZJS |
277 | |
278 | return 1; | |
279 | } | |
280 | ||
3c171f0b | 281 | static int make_filename(const char *context[_CONTEXT_MAX], char **ret) { |
b59233e6 | 282 | _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; |
a7f7d1bd | 283 | sd_id128_t boot = {}; |
34c10968 LP |
284 | int r; |
285 | ||
3c171f0b | 286 | assert(context); |
34c10968 | 287 | |
3c171f0b | 288 | c = filename_escape(context[CONTEXT_COMM]); |
34c10968 | 289 | if (!c) |
b59233e6 | 290 | return -ENOMEM; |
34c10968 | 291 | |
3c171f0b | 292 | u = filename_escape(context[CONTEXT_UID]); |
0dc5d23c | 293 | if (!u) |
b59233e6 | 294 | return -ENOMEM; |
34c10968 LP |
295 | |
296 | r = sd_id128_get_boot(&boot); | |
b59233e6 | 297 | if (r < 0) |
34c10968 | 298 | return r; |
34c10968 | 299 | |
3c171f0b | 300 | p = filename_escape(context[CONTEXT_PID]); |
b59233e6 LP |
301 | if (!p) |
302 | return -ENOMEM; | |
303 | ||
3c171f0b | 304 | t = filename_escape(context[CONTEXT_TIMESTAMP]); |
b59233e6 LP |
305 | if (!t) |
306 | return -ENOMEM; | |
307 | ||
308 | if (asprintf(ret, | |
0dc5d23c | 309 | "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000", |
34c10968 | 310 | c, |
0dc5d23c | 311 | u, |
34c10968 LP |
312 | SD_ID128_FORMAT_VAL(boot), |
313 | p, | |
b59233e6 LP |
314 | t) < 0) |
315 | return -ENOMEM; | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
320 | static int save_external_coredump( | |
3c171f0b LP |
321 | const char *context[_CONTEXT_MAX], |
322 | int input_fd, | |
b59233e6 | 323 | char **ret_filename, |
5f3e0a74 HW |
324 | int *ret_node_fd, |
325 | int *ret_data_fd, | |
0cd4e913 | 326 | uint64_t *ret_size, |
cc4419ed | 327 | bool *ret_truncated) { |
b59233e6 LP |
328 | |
329 | _cleanup_free_ char *fn = NULL, *tmp = NULL; | |
330 | _cleanup_close_ int fd = -1; | |
ee0449fd | 331 | uint64_t rlimit, process_limit, max_size; |
b59233e6 | 332 | struct stat st; |
3c171f0b | 333 | uid_t uid; |
b59233e6 LP |
334 | int r; |
335 | ||
3c171f0b | 336 | assert(context); |
b59233e6 | 337 | assert(ret_filename); |
5f3e0a74 HW |
338 | assert(ret_node_fd); |
339 | assert(ret_data_fd); | |
b59233e6 LP |
340 | assert(ret_size); |
341 | ||
3c171f0b LP |
342 | r = parse_uid(context[CONTEXT_UID], &uid); |
343 | if (r < 0) | |
344 | return log_error_errno(r, "Failed to parse UID: %m"); | |
345 | ||
bdfd7b2c LP |
346 | r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit); |
347 | if (r < 0) | |
348 | return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]); | |
6998b540 ZJS |
349 | if (rlimit < page_size()) { |
350 | /* Is coredumping disabled? Then don't bother saving/processing the coredump. | |
351 | * Anything below PAGE_SIZE cannot give a readable coredump (the kernel uses | |
352 | * ELF_EXEC_PAGESIZE which is not easily accessible, but is usually the same as PAGE_SIZE. */ | |
73a99163 ZJS |
353 | log_info("Resource limits disable core dumping for process %s (%s).", |
354 | context[CONTEXT_PID], context[CONTEXT_COMM]); | |
bdfd7b2c LP |
355 | return -EBADSLT; |
356 | } | |
357 | ||
ee0449fd ZJS |
358 | process_limit = MAX(arg_process_size_max, storage_size_max()); |
359 | if (process_limit == 0) { | |
360 | log_debug("Limits for coredump processing and storage are both 0, not dumping core."); | |
361 | return -EBADSLT; | |
362 | } | |
363 | ||
bdfd7b2c | 364 | /* Never store more than the process configured, or than we actually shall keep or process */ |
ee0449fd | 365 | max_size = MIN(rlimit, process_limit); |
bdfd7b2c | 366 | |
3c171f0b | 367 | r = make_filename(context, &fn); |
23bbb0de MS |
368 | if (r < 0) |
369 | return log_error_errno(r, "Failed to determine coredump file name: %m"); | |
34c10968 | 370 | |
d2e54fae | 371 | mkdir_p_label("/var/lib/systemd/coredump", 0755); |
803a3464 | 372 | |
03532f0a | 373 | fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp); |
4a62c710 | 374 | if (fd < 0) |
03532f0a | 375 | return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn); |
803a3464 | 376 | |
1c876927 | 377 | r = copy_bytes(input_fd, fd, max_size, 0); |
73a99163 ZJS |
378 | if (r < 0) { |
379 | log_error_errno(r, "Cannot store coredump of %s (%s): %m", context[CONTEXT_PID], context[CONTEXT_COMM]); | |
93240d3a | 380 | goto fail; |
0cd4e913 | 381 | } |
cc4419ed ZJS |
382 | *ret_truncated = r == 1; |
383 | if (*ret_truncated) | |
73a99163 ZJS |
384 | log_struct(LOG_INFO, |
385 | LOG_MESSAGE("Core file was truncated to %zu bytes.", max_size), | |
386 | "SIZE_LIMIT=%zu", max_size, | |
a1230ff9 | 387 | "MESSAGE_ID=" SD_MESSAGE_TRUNCATED_CORE_STR); |
803a3464 | 388 | |
34c10968 | 389 | if (fstat(fd, &st) < 0) { |
73a99163 | 390 | log_error_errno(errno, "Failed to fstat core file %s: %m", coredump_tmpfile_name(tmp)); |
34c10968 LP |
391 | goto fail; |
392 | } | |
393 | ||
7849c2ac | 394 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { |
0c773903 | 395 | log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(tmp)); |
b59233e6 | 396 | goto fail; |
7849c2ac TA |
397 | } |
398 | ||
349cc4a5 | 399 | #if HAVE_XZ || HAVE_LZ4 |
cfd652ed | 400 | /* If we will remove the coredump anyway, do not compress. */ |
6e9ef603 | 401 | if (arg_compress && !maybe_remove_external_coredump(NULL, st.st_size)) { |
cfd652ed | 402 | |
b59233e6 LP |
403 | _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL; |
404 | _cleanup_close_ int fd_compressed = -1; | |
cfd652ed | 405 | |
d89c8fdf | 406 | fn_compressed = strappend(fn, COMPRESSED_EXT); |
b59233e6 | 407 | if (!fn_compressed) { |
d89c8fdf | 408 | log_oom(); |
cfd652ed ZJS |
409 | goto uncompressed; |
410 | } | |
411 | ||
03532f0a LP |
412 | fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed); |
413 | if (fd_compressed < 0) { | |
414 | log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed); | |
b59233e6 | 415 | goto uncompressed; |
03532f0a | 416 | } |
cfd652ed | 417 | |
d89c8fdf | 418 | r = compress_stream(fd, fd_compressed, -1); |
b59233e6 | 419 | if (r < 0) { |
0c773903 | 420 | log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed)); |
b59233e6 LP |
421 | goto fail_compressed; |
422 | } | |
423 | ||
3c171f0b | 424 | r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid); |
cfd652ed | 425 | if (r < 0) |
b59233e6 LP |
426 | goto fail_compressed; |
427 | ||
428 | /* OK, this worked, we can get rid of the uncompressed version now */ | |
0c773903 EV |
429 | if (tmp) |
430 | unlink_noerrno(tmp); | |
cfd652ed | 431 | |
1cc6c93a YW |
432 | *ret_filename = TAKE_PTR(fn_compressed); /* compressed */ |
433 | *ret_node_fd = TAKE_FD(fd_compressed); /* compressed */ | |
434 | *ret_data_fd = TAKE_FD(fd); /* uncompressed */ | |
59f448cf | 435 | *ret_size = (uint64_t) st.st_size; /* uncompressed */ |
cfd652ed | 436 | |
cfd652ed ZJS |
437 | return 0; |
438 | ||
b59233e6 | 439 | fail_compressed: |
0c773903 EV |
440 | if (tmp_compressed) |
441 | (void) unlink(tmp_compressed); | |
34c10968 | 442 | } |
cfd652ed ZJS |
443 | |
444 | uncompressed: | |
3b1a55e1 | 445 | #endif |
5f3e0a74 | 446 | |
3c171f0b | 447 | r = fix_permissions(fd, tmp, fn, context, uid); |
cfd652ed ZJS |
448 | if (r < 0) |
449 | goto fail; | |
34c10968 | 450 | |
1cc6c93a YW |
451 | *ret_filename = TAKE_PTR(fn); |
452 | *ret_data_fd = TAKE_FD(fd); | |
5f3e0a74 | 453 | *ret_node_fd = -1; |
59f448cf | 454 | *ret_size = (uint64_t) st.st_size; |
34c10968 | 455 | |
34c10968 LP |
456 | return 0; |
457 | ||
458 | fail: | |
0c773903 EV |
459 | if (tmp) |
460 | (void) unlink(tmp); | |
34c10968 LP |
461 | return r; |
462 | } | |
463 | ||
464 | static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) { | |
465 | _cleanup_free_ char *field = NULL; | |
466 | ssize_t n; | |
467 | ||
8d4e028f | 468 | assert(fd >= 0); |
34c10968 LP |
469 | assert(ret); |
470 | assert(ret_size); | |
471 | ||
4a62c710 MS |
472 | if (lseek(fd, 0, SEEK_SET) == (off_t) -1) |
473 | return log_warning_errno(errno, "Failed to seek: %m"); | |
803a3464 | 474 | |
34c10968 LP |
475 | field = malloc(9 + size); |
476 | if (!field) { | |
cfd652ed | 477 | log_warning("Failed to allocate memory for coredump, coredump will not be stored."); |
34c10968 LP |
478 | return -ENOMEM; |
479 | } | |
480 | ||
481 | memcpy(field, "COREDUMP=", 9); | |
482 | ||
483 | n = read(fd, field + 9, size); | |
23bbb0de MS |
484 | if (n < 0) |
485 | return log_error_errno((int) n, "Failed to read core data: %m"); | |
34c10968 LP |
486 | if ((size_t) n < size) { |
487 | log_error("Core data too short."); | |
488 | return -EIO; | |
489 | } | |
490 | ||
1cc6c93a | 491 | *ret = TAKE_PTR(field); |
34c10968 LP |
492 | *ret_size = size + 9; |
493 | ||
34c10968 LP |
494 | return 0; |
495 | } | |
803a3464 | 496 | |
3f132692 JF |
497 | /* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines: |
498 | * 0:/dev/pts/23 | |
499 | * pos: 0 | |
500 | * flags: 0100002 | |
501 | * | |
502 | * 1:/dev/pts/23 | |
503 | * pos: 0 | |
504 | * flags: 0100002 | |
505 | * | |
506 | * 2:/dev/pts/23 | |
507 | * pos: 0 | |
508 | * flags: 0100002 | |
509 | * EOF | |
510 | */ | |
511 | static int compose_open_fds(pid_t pid, char **open_fds) { | |
4d84bc2f LP |
512 | _cleanup_closedir_ DIR *proc_fd_dir = NULL; |
513 | _cleanup_close_ int proc_fdinfo_fd = -1; | |
514 | _cleanup_free_ char *buffer = NULL; | |
3f132692 | 515 | _cleanup_fclose_ FILE *stream = NULL; |
59059b4a | 516 | const char *fddelim = "", *path; |
3f132692 | 517 | struct dirent *dent = NULL; |
4d84bc2f | 518 | size_t size = 0; |
3f132692 JF |
519 | int r = 0; |
520 | ||
521 | assert(pid >= 0); | |
522 | assert(open_fds != NULL); | |
523 | ||
59059b4a | 524 | path = procfs_file_alloca(pid, "fd"); |
3f132692 | 525 | proc_fd_dir = opendir(path); |
59059b4a ZJS |
526 | if (!proc_fd_dir) |
527 | return -errno; | |
3f132692 | 528 | |
4d84bc2f | 529 | proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH); |
59059b4a ZJS |
530 | if (proc_fdinfo_fd < 0) |
531 | return -errno; | |
3f132692 | 532 | |
4d84bc2f | 533 | stream = open_memstream(&buffer, &size); |
3f132692 JF |
534 | if (!stream) |
535 | return -ENOMEM; | |
536 | ||
0d536673 LP |
537 | (void) __fsetlocking(stream, FSETLOCKING_BYCALLER); |
538 | ||
4d84bc2f | 539 | FOREACH_DIRENT(dent, proc_fd_dir, return -errno) { |
3f132692 | 540 | _cleanup_fclose_ FILE *fdinfo = NULL; |
4d84bc2f | 541 | _cleanup_free_ char *fdname = NULL; |
59059b4a | 542 | char line[LINE_MAX]; |
4d84bc2f | 543 | int fd; |
3f132692 | 544 | |
59059b4a | 545 | r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname); |
3f132692 JF |
546 | if (r < 0) |
547 | return r; | |
548 | ||
549 | fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname); | |
550 | fddelim = "\n"; | |
551 | ||
552 | /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */ | |
59059b4a ZJS |
553 | fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY); |
554 | if (fd < 0) | |
3f132692 JF |
555 | continue; |
556 | ||
59059b4a | 557 | fdinfo = fdopen(fd, "re"); |
234519ae | 558 | if (!fdinfo) { |
0d536673 | 559 | safe_close(fd); |
3f132692 | 560 | continue; |
59059b4a | 561 | } |
3f132692 | 562 | |
4d84bc2f | 563 | FOREACH_LINE(line, fdinfo, break) { |
0d536673 | 564 | fputs(line, stream); |
4d84bc2f LP |
565 | if (!endswith(line, "\n")) |
566 | fputc('\n', stream); | |
567 | } | |
3f132692 JF |
568 | } |
569 | ||
4d84bc2f | 570 | errno = 0; |
74ca738f | 571 | stream = safe_fclose(stream); |
4d84bc2f | 572 | |
b3267152 | 573 | if (errno > 0) |
4d84bc2f LP |
574 | return -errno; |
575 | ||
ae2a15bc | 576 | *open_fds = TAKE_PTR(buffer); |
4d84bc2f | 577 | |
3f132692 JF |
578 | return 0; |
579 | } | |
580 | ||
7ed03ce6 JF |
581 | static int get_process_ns(pid_t pid, const char *namespace, ino_t *ns) { |
582 | const char *p; | |
583 | struct stat stbuf; | |
584 | _cleanup_close_ int proc_ns_dir_fd; | |
585 | ||
586 | p = procfs_file_alloca(pid, "ns"); | |
587 | ||
588 | proc_ns_dir_fd = open(p, O_DIRECTORY | O_CLOEXEC | O_RDONLY); | |
589 | if (proc_ns_dir_fd < 0) | |
590 | return -errno; | |
591 | ||
592 | if (fstatat(proc_ns_dir_fd, namespace, &stbuf, /* flags */0) < 0) | |
593 | return -errno; | |
594 | ||
595 | *ns = stbuf.st_ino; | |
596 | return 0; | |
597 | } | |
598 | ||
599 | static int get_mount_namespace_leader(pid_t pid, pid_t *container_pid) { | |
600 | pid_t cpid = pid, ppid = 0; | |
601 | ino_t proc_mntns; | |
602 | int r = 0; | |
603 | ||
604 | r = get_process_ns(pid, "mnt", &proc_mntns); | |
605 | if (r < 0) | |
606 | return r; | |
607 | ||
aa7530d6 | 608 | for (;;) { |
7ed03ce6 JF |
609 | ino_t parent_mntns; |
610 | ||
611 | r = get_process_ppid(cpid, &ppid); | |
612 | if (r < 0) | |
613 | return r; | |
614 | ||
615 | r = get_process_ns(ppid, "mnt", &parent_mntns); | |
616 | if (r < 0) | |
617 | return r; | |
618 | ||
619 | if (proc_mntns != parent_mntns) | |
620 | break; | |
621 | ||
622 | if (ppid == 1) | |
623 | return -ENOENT; | |
624 | ||
625 | cpid = ppid; | |
626 | } | |
627 | ||
628 | *container_pid = ppid; | |
629 | return 0; | |
630 | } | |
631 | ||
632 | /* Returns 1 if the parent was found. | |
633 | * Returns 0 if there is not a process we can call the pid's | |
634 | * container parent (the pid's process isn't 'containerized'). | |
635 | * Returns a negative number on errors. | |
636 | */ | |
637 | static int get_process_container_parent_cmdline(pid_t pid, char** cmdline) { | |
638 | int r = 0; | |
639 | pid_t container_pid; | |
640 | const char *proc_root_path; | |
641 | struct stat root_stat, proc_root_stat; | |
642 | ||
643 | /* To compare inodes of / and /proc/[pid]/root */ | |
644 | if (stat("/", &root_stat) < 0) | |
645 | return -errno; | |
646 | ||
647 | proc_root_path = procfs_file_alloca(pid, "root"); | |
648 | if (stat(proc_root_path, &proc_root_stat) < 0) | |
649 | return -errno; | |
650 | ||
651 | /* The process uses system root. */ | |
652 | if (proc_root_stat.st_ino == root_stat.st_ino) { | |
653 | *cmdline = NULL; | |
654 | return 0; | |
655 | } | |
656 | ||
657 | r = get_mount_namespace_leader(pid, &container_pid); | |
658 | if (r < 0) | |
659 | return r; | |
660 | ||
d3cba4ea EV |
661 | r = get_process_cmdline(container_pid, 0, false, cmdline); |
662 | if (r < 0) | |
663 | return r; | |
664 | ||
665 | return 1; | |
7ed03ce6 JF |
666 | } |
667 | ||
3c171f0b LP |
668 | static int change_uid_gid(const char *context[]) { |
669 | uid_t uid; | |
670 | gid_t gid; | |
671 | int r; | |
34c10968 | 672 | |
3c171f0b LP |
673 | r = parse_uid(context[CONTEXT_UID], &uid); |
674 | if (r < 0) | |
675 | return r; | |
8c8549db | 676 | |
888e378d LP |
677 | if (uid <= SYSTEM_UID_MAX) { |
678 | const char *user = "systemd-coredump"; | |
679 | ||
680 | r = get_user_creds(&user, &uid, &gid, NULL, NULL); | |
681 | if (r < 0) { | |
682 | log_warning_errno(r, "Cannot resolve %s user. Proceeding to dump core as root: %m", user); | |
683 | uid = gid = 0; | |
684 | } | |
685 | } else { | |
686 | r = parse_gid(context[CONTEXT_GID], &gid); | |
687 | if (r < 0) | |
688 | return r; | |
689 | } | |
3c171f0b LP |
690 | |
691 | return drop_privileges(uid, gid, 0); | |
692 | } | |
8c8549db | 693 | |
b8cda92d LP |
694 | static bool is_journald_crash(const char *context[_CONTEXT_MAX]) { |
695 | assert(context); | |
696 | ||
697 | return streq_ptr(context[CONTEXT_UNIT], SPECIAL_JOURNALD_SERVICE); | |
698 | } | |
699 | ||
700 | static bool is_pid1_crash(const char *context[_CONTEXT_MAX]) { | |
701 | assert(context); | |
702 | ||
703 | return streq_ptr(context[CONTEXT_UNIT], SPECIAL_INIT_SCOPE) || | |
704 | streq_ptr(context[CONTEXT_PID], "1"); | |
705 | } | |
706 | ||
0cd4e913 ZJS |
707 | #define SUBMIT_COREDUMP_FIELDS 4 |
708 | ||
3c171f0b LP |
709 | static int submit_coredump( |
710 | const char *context[_CONTEXT_MAX], | |
711 | struct iovec *iovec, | |
712 | size_t n_iovec_allocated, | |
713 | size_t n_iovec, | |
714 | int input_fd) { | |
34c10968 | 715 | |
5f3e0a74 | 716 | _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; |
3c171f0b | 717 | _cleanup_free_ char *core_message = NULL, *filename = NULL, *coredump_data = NULL; |
a5ca3649 | 718 | uint64_t coredump_size = UINT64_MAX; |
92e92d71 | 719 | bool truncated = false, journald_crash; |
3c171f0b | 720 | int r; |
f5e04665 | 721 | |
3c171f0b LP |
722 | assert(context); |
723 | assert(iovec); | |
0cd4e913 | 724 | assert(n_iovec_allocated >= n_iovec + SUBMIT_COREDUMP_FIELDS); |
3c171f0b | 725 | assert(input_fd >= 0); |
f5e04665 | 726 | |
b8cda92d | 727 | journald_crash = is_journald_crash(context); |
92e92d71 | 728 | |
3c171f0b LP |
729 | /* Vacuum before we write anything again */ |
730 | (void) coredump_vacuum(-1, arg_keep_free, arg_max_use); | |
803a3464 | 731 | |
3c171f0b | 732 | /* Always stream the coredump to disk, if that's possible */ |
0cd4e913 ZJS |
733 | r = save_external_coredump(context, input_fd, |
734 | &filename, &coredump_node_fd, &coredump_fd, &coredump_size, &truncated); | |
3c171f0b LP |
735 | if (r < 0) |
736 | /* Skip whole core dumping part */ | |
737 | goto log; | |
738 | ||
739 | /* If we don't want to keep the coredump on disk, remove it now, as later on we will lack the privileges for | |
740 | * it. However, we keep the fd to it, so that we can still process it and log it. */ | |
741 | r = maybe_remove_external_coredump(filename, coredump_size); | |
742 | if (r < 0) | |
743 | return r; | |
744 | if (r == 0) { | |
745 | const char *coredump_filename; | |
746 | ||
747 | coredump_filename = strjoina("COREDUMP_FILENAME=", filename); | |
e6a7ec4b | 748 | iovec[n_iovec++] = IOVEC_MAKE_STRING(coredump_filename); |
6e9ef603 | 749 | } else if (arg_storage == COREDUMP_STORAGE_EXTERNAL) |
5206a724 | 750 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 751 | coredump_size, arg_external_size_max); |
f5e04665 | 752 | |
3c171f0b LP |
753 | /* Vacuum again, but exclude the coredump we just created */ |
754 | (void) coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use); | |
8c9571d0 | 755 | |
3c171f0b LP |
756 | /* Now, let's drop privileges to become the user who owns the segfaulted process and allocate the coredump |
757 | * memory under the user's uid. This also ensures that the credentials journald will see are the ones of the | |
758 | * coredumping user, thus making sure the user gets access to the core dump. Let's also get rid of all | |
759 | * capabilities, if we run as root, we won't need them anymore. */ | |
760 | r = change_uid_gid(context); | |
761 | if (r < 0) | |
762 | return log_error_errno(r, "Failed to drop privileges: %m"); | |
34c10968 | 763 | |
349cc4a5 | 764 | #if HAVE_ELFUTILS |
3c171f0b LP |
765 | /* Try to get a strack trace if we can */ |
766 | if (coredump_size <= arg_process_size_max) { | |
767 | _cleanup_free_ char *stacktrace = NULL; | |
768 | ||
769 | r = coredump_make_stack_trace(coredump_fd, context[CONTEXT_EXE], &stacktrace); | |
770 | if (r >= 0) | |
605405c6 ZJS |
771 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
772 | " (", context[CONTEXT_COMM], ") of user ", | |
92e92d71 ZJS |
773 | context[CONTEXT_UID], " dumped core.", |
774 | journald_crash ? "\nCoredump diverted to " : "", | |
775 | journald_crash ? filename : "", | |
776 | "\n\n", stacktrace); | |
3c171f0b LP |
777 | else if (r == -EINVAL) |
778 | log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno())); | |
779 | else | |
780 | log_warning_errno(r, "Failed to generate stack trace: %m"); | |
6e9ef603 | 781 | } else |
5206a724 | 782 | log_debug("Not generating stack trace: core size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 783 | coredump_size, arg_process_size_max); |
803a3464 | 784 | |
3c171f0b LP |
785 | if (!core_message) |
786 | #endif | |
787 | log: | |
92e92d71 ZJS |
788 | core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
789 | " (", context[CONTEXT_COMM], ") of user ", | |
790 | context[CONTEXT_UID], " dumped core.", | |
791 | journald_crash ? "\nCoredump diverted to " : NULL, | |
792 | journald_crash ? filename : NULL); | |
793 | if (!core_message) | |
794 | return log_oom(); | |
795 | ||
796 | if (journald_crash) { | |
797 | /* We cannot log to the journal, so just print the MESSAGE. | |
798 | * The target was set previously to something safe. */ | |
ae2173d6 | 799 | log_dispatch(LOG_ERR, 0, core_message); |
92e92d71 ZJS |
800 | return 0; |
801 | } | |
802 | ||
e6a7ec4b | 803 | iovec[n_iovec++] = IOVEC_MAKE_STRING(core_message); |
3c171f0b | 804 | |
0cd4e913 | 805 | if (truncated) |
e6a7ec4b | 806 | iovec[n_iovec++] = IOVEC_MAKE_STRING("COREDUMP_TRUNCATED=1"); |
0cd4e913 | 807 | |
3c171f0b | 808 | /* Optionally store the entire coredump in the journal */ |
6e9ef603 ZJS |
809 | if (arg_storage == COREDUMP_STORAGE_JOURNAL) { |
810 | if (coredump_size <= arg_journal_size_max) { | |
811 | size_t sz = 0; | |
812 | ||
813 | /* Store the coredump itself in the journal */ | |
814 | ||
815 | r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz); | |
e6a7ec4b LP |
816 | if (r >= 0) |
817 | iovec[n_iovec++] = IOVEC_MAKE(coredump_data, sz); | |
818 | else | |
6e9ef603 ZJS |
819 | log_warning_errno(r, "Failed to attach the core to the journal entry: %m"); |
820 | } else | |
5206a724 | 821 | log_info("The core will not be stored: size %"PRIu64" is greater than %"PRIu64" (the configured maximum)", |
6e9ef603 | 822 | coredump_size, arg_journal_size_max); |
f5e04665 LP |
823 | } |
824 | ||
3c171f0b LP |
825 | assert(n_iovec <= n_iovec_allocated); |
826 | ||
827 | r = sd_journal_sendv(iovec, n_iovec); | |
828 | if (r < 0) | |
829 | return log_error_errno(r, "Failed to log coredump: %m"); | |
830 | ||
831 | return 0; | |
832 | } | |
833 | ||
ea5cc2a8 | 834 | static void map_context_fields(const struct iovec *iovec, const char* context[]) { |
3c171f0b | 835 | |
92e92d71 | 836 | static const char * const context_field_names[] = { |
3c171f0b LP |
837 | [CONTEXT_PID] = "COREDUMP_PID=", |
838 | [CONTEXT_UID] = "COREDUMP_UID=", | |
839 | [CONTEXT_GID] = "COREDUMP_GID=", | |
840 | [CONTEXT_SIGNAL] = "COREDUMP_SIGNAL=", | |
841 | [CONTEXT_TIMESTAMP] = "COREDUMP_TIMESTAMP=", | |
92e92d71 | 842 | [CONTEXT_RLIMIT] = "COREDUMP_RLIMIT=", |
f45b8015 | 843 | [CONTEXT_HOSTNAME] = "COREDUMP_HOSTNAME=", |
3c171f0b LP |
844 | [CONTEXT_COMM] = "COREDUMP_COMM=", |
845 | [CONTEXT_EXE] = "COREDUMP_EXE=", | |
846 | }; | |
847 | ||
848 | unsigned i; | |
849 | ||
850 | assert(iovec); | |
851 | assert(context); | |
852 | ||
92e92d71 | 853 | for (i = 0; i < ELEMENTSOF(context_field_names); i++) { |
d27b725a | 854 | char *p; |
3c171f0b | 855 | |
92e92d71 ZJS |
856 | if (!context_field_names[i]) |
857 | continue; | |
858 | ||
d27b725a LP |
859 | p = memory_startswith(iovec->iov_base, iovec->iov_len, context_field_names[i]); |
860 | if (!p) | |
3c171f0b LP |
861 | continue; |
862 | ||
863 | /* Note that these strings are NUL terminated, because we made sure that a trailing NUL byte is in the | |
864 | * buffer, though not included in the iov_len count. (see below) */ | |
d27b725a | 865 | context[i] = p; |
3c171f0b LP |
866 | break; |
867 | } | |
868 | } | |
869 | ||
870 | static int process_socket(int fd) { | |
871 | _cleanup_close_ int coredump_fd = -1; | |
872 | struct iovec *iovec = NULL; | |
80002f66 | 873 | size_t n_iovec = 0, n_allocated = 0, i, k; |
3c171f0b LP |
874 | const char *context[_CONTEXT_MAX] = {}; |
875 | int r; | |
876 | ||
877 | assert(fd >= 0); | |
878 | ||
879 | log_set_target(LOG_TARGET_AUTO); | |
880 | log_parse_environment(); | |
881 | log_open(); | |
882 | ||
988e89ee ZJS |
883 | log_debug("Processing coredump received on stdin..."); |
884 | ||
3c171f0b LP |
885 | for (;;) { |
886 | union { | |
887 | struct cmsghdr cmsghdr; | |
888 | uint8_t buf[CMSG_SPACE(sizeof(int))]; | |
889 | } control = {}; | |
890 | struct msghdr mh = { | |
891 | .msg_control = &control, | |
892 | .msg_controllen = sizeof(control), | |
893 | .msg_iovlen = 1, | |
894 | }; | |
895 | ssize_t n; | |
fe1ef0f8 | 896 | ssize_t l; |
3c171f0b | 897 | |
0cd4e913 | 898 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + SUBMIT_COREDUMP_FIELDS)) { |
3c171f0b LP |
899 | r = log_oom(); |
900 | goto finish; | |
901 | } | |
902 | ||
fe1ef0f8 EV |
903 | l = next_datagram_size_fd(fd); |
904 | if (l < 0) { | |
905 | r = log_error_errno(l, "Failed to determine datagram size to read: %m"); | |
3c171f0b LP |
906 | goto finish; |
907 | } | |
908 | ||
909 | assert(l >= 0); | |
910 | ||
911 | iovec[n_iovec].iov_len = l; | |
912 | iovec[n_iovec].iov_base = malloc(l + 1); | |
3c171f0b LP |
913 | if (!iovec[n_iovec].iov_base) { |
914 | r = log_oom(); | |
915 | goto finish; | |
916 | } | |
917 | ||
918 | mh.msg_iov = iovec + n_iovec; | |
919 | ||
920 | n = recvmsg(fd, &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC); | |
921 | if (n < 0) { | |
922 | free(iovec[n_iovec].iov_base); | |
923 | r = log_error_errno(errno, "Failed to receive datagram: %m"); | |
924 | goto finish; | |
925 | } | |
926 | ||
927 | if (n == 0) { | |
928 | struct cmsghdr *cmsg, *found = NULL; | |
929 | /* The final zero-length datagram carries the file descriptor and tells us that we're done. */ | |
930 | ||
931 | free(iovec[n_iovec].iov_base); | |
932 | ||
933 | CMSG_FOREACH(cmsg, &mh) { | |
934 | if (cmsg->cmsg_level == SOL_SOCKET && | |
935 | cmsg->cmsg_type == SCM_RIGHTS && | |
936 | cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { | |
937 | assert(!found); | |
938 | found = cmsg; | |
939 | } | |
940 | } | |
941 | ||
942 | if (!found) { | |
943 | log_error("Coredump file descriptor missing."); | |
944 | r = -EBADMSG; | |
945 | goto finish; | |
946 | } | |
947 | ||
948 | assert(coredump_fd < 0); | |
949 | coredump_fd = *(int*) CMSG_DATA(found); | |
950 | break; | |
951 | } | |
952 | ||
953 | /* Add trailing NUL byte, in case these are strings */ | |
954 | ((char*) iovec[n_iovec].iov_base)[n] = 0; | |
955 | iovec[n_iovec].iov_len = (size_t) n; | |
956 | ||
957 | cmsg_close_all(&mh); | |
958 | map_context_fields(iovec + n_iovec, context); | |
959 | n_iovec++; | |
960 | } | |
961 | ||
0cd4e913 | 962 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + SUBMIT_COREDUMP_FIELDS)) { |
3c171f0b | 963 | r = log_oom(); |
34c10968 LP |
964 | goto finish; |
965 | } | |
966 | ||
61233823 | 967 | /* Make sure we got all data we really need */ |
3c171f0b LP |
968 | assert(context[CONTEXT_PID]); |
969 | assert(context[CONTEXT_UID]); | |
970 | assert(context[CONTEXT_GID]); | |
971 | assert(context[CONTEXT_SIGNAL]); | |
972 | assert(context[CONTEXT_TIMESTAMP]); | |
bdfd7b2c | 973 | assert(context[CONTEXT_RLIMIT]); |
f45b8015 | 974 | assert(context[CONTEXT_HOSTNAME]); |
3c171f0b LP |
975 | assert(context[CONTEXT_COMM]); |
976 | assert(coredump_fd >= 0); | |
977 | ||
80002f66 LP |
978 | /* Small quirk: the journal fields contain the timestamp padded with six zeroes, so that the kernel-supplied 1s |
979 | * granularity timestamps becomes 1µs granularity, i.e. the granularity systemd usually operates in. Since we | |
980 | * are reconstructing the original kernel context, we chop this off again, here. */ | |
981 | k = strlen(context[CONTEXT_TIMESTAMP]); | |
982 | if (k > 6) | |
983 | context[CONTEXT_TIMESTAMP] = strndupa(context[CONTEXT_TIMESTAMP], k - 6); | |
984 | ||
5b45a160 | 985 | r = submit_coredump(context, iovec, n_allocated, n_iovec, coredump_fd); |
3c171f0b LP |
986 | |
987 | finish: | |
988 | for (i = 0; i < n_iovec; i++) | |
989 | free(iovec[i].iov_base); | |
990 | free(iovec); | |
991 | ||
992 | return r; | |
993 | } | |
994 | ||
995 | static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd) { | |
996 | ||
997 | static const union sockaddr_union sa = { | |
998 | .un.sun_family = AF_UNIX, | |
999 | .un.sun_path = "/run/systemd/coredump", | |
1000 | }; | |
1001 | _cleanup_close_ int fd = -1; | |
1002 | size_t i; | |
1003 | int r; | |
1004 | ||
1005 | assert(iovec || n_iovec <= 0); | |
1006 | assert(input_fd >= 0); | |
1007 | ||
1008 | fd = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0); | |
1009 | if (fd < 0) | |
1010 | return log_error_errno(errno, "Failed to create coredump socket: %m"); | |
1011 | ||
fc2fffe7 | 1012 | if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) |
3c171f0b LP |
1013 | return log_error_errno(errno, "Failed to connect to coredump service: %m"); |
1014 | ||
1015 | for (i = 0; i < n_iovec; i++) { | |
fec603eb LP |
1016 | struct msghdr mh = { |
1017 | .msg_iov = (struct iovec*) iovec + i, | |
1018 | .msg_iovlen = 1, | |
1019 | }; | |
1020 | struct iovec copy[2]; | |
1021 | ||
1022 | for (;;) { | |
1023 | if (sendmsg(fd, &mh, MSG_NOSIGNAL) >= 0) | |
1024 | break; | |
1025 | ||
1026 | if (errno == EMSGSIZE && mh.msg_iov[0].iov_len > 0) { | |
1027 | /* This field didn't fit? That's a pity. Given that this is just metadata, | |
1028 | * let's truncate the field at half, and try again. We append three dots, in | |
1029 | * order to show that this is truncated. */ | |
1030 | ||
1031 | if (mh.msg_iov != copy) { | |
1032 | /* We don't want to modify the caller's iovec, hence let's create our | |
1033 | * own array, consisting of two new iovecs, where the first is a | |
1034 | * (truncated) copy of what we want to send, and the second one | |
1035 | * contains the trailing dots. */ | |
1036 | copy[0] = iovec[i]; | |
1037 | copy[1] = (struct iovec) { | |
1038 | .iov_base = (char[]) { '.', '.', '.' }, | |
1039 | .iov_len = 3, | |
1040 | }; | |
1041 | ||
1042 | mh.msg_iov = copy; | |
1043 | mh.msg_iovlen = 2; | |
1044 | } | |
1045 | ||
1046 | copy[0].iov_len /= 2; /* halve it, and try again */ | |
1047 | continue; | |
1048 | } | |
3c171f0b | 1049 | |
3c171f0b | 1050 | return log_error_errno(errno, "Failed to send coredump datagram: %m"); |
fec603eb | 1051 | } |
1eef15b1 ZJS |
1052 | } |
1053 | ||
3c171f0b LP |
1054 | r = send_one_fd(fd, input_fd, 0); |
1055 | if (r < 0) | |
1056 | return log_error_errno(r, "Failed to send coredump fd: %m"); | |
1eef15b1 | 1057 | |
3c171f0b LP |
1058 | return 0; |
1059 | } | |
1eef15b1 | 1060 | |
f45b8015 | 1061 | static char* set_iovec_field(struct iovec *iovec, size_t *n_iovec, const char *field, const char *value) { |
9aa82023 | 1062 | char *x; |
3c171f0b | 1063 | |
9aa82023 ZJS |
1064 | x = strappend(field, value); |
1065 | if (x) | |
e6a7ec4b | 1066 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(x); |
9aa82023 ZJS |
1067 | return x; |
1068 | } | |
3c171f0b | 1069 | |
f45b8015 | 1070 | static char* set_iovec_field_free(struct iovec *iovec, size_t *n_iovec, const char *field, char *value) { |
9aa82023 ZJS |
1071 | char *x; |
1072 | ||
1073 | x = set_iovec_field(iovec, n_iovec, field, value); | |
1074 | free(value); | |
1075 | return x; | |
1076 | } | |
1077 | ||
92e92d71 | 1078 | static int gather_pid_metadata( |
ea5cc2a8 | 1079 | char* context[_CONTEXT_MAX], |
9aa82023 | 1080 | char **comm_fallback, |
5b45a160 | 1081 | struct iovec *iovec, size_t *n_iovec) { |
d14bcb4e | 1082 | |
f45b8015 | 1083 | /* We need 27 empty slots in iovec! |
d14bcb4e LP |
1084 | * |
1085 | * Note that if we fail on oom later on, we do not roll-back changes to the iovec structure. (It remains valid, | |
1086 | * with the first n_iovec fields initialized.) */ | |
3c171f0b | 1087 | |
3c171f0b | 1088 | uid_t owner_uid; |
3c171f0b LP |
1089 | pid_t pid; |
1090 | char *t; | |
9aa82023 | 1091 | const char *p; |
d14bcb4e | 1092 | int r, signo; |
3c171f0b | 1093 | |
9aa82023 | 1094 | r = parse_pid(context[CONTEXT_PID], &pid); |
3c171f0b | 1095 | if (r < 0) |
988e89ee | 1096 | return log_error_errno(r, "Failed to parse PID \"%s\": %m", context[CONTEXT_PID]); |
3c171f0b | 1097 | |
ea5cc2a8 | 1098 | r = get_process_comm(pid, &context[CONTEXT_COMM]); |
3c171f0b LP |
1099 | if (r < 0) { |
1100 | log_warning_errno(r, "Failed to get COMM, falling back to the command line: %m"); | |
ea5cc2a8 ZJS |
1101 | context[CONTEXT_COMM] = strv_join(comm_fallback, " "); |
1102 | if (!context[CONTEXT_COMM]) | |
3c171f0b LP |
1103 | return log_oom(); |
1104 | } | |
1105 | ||
ea5cc2a8 | 1106 | r = get_process_exe(pid, &context[CONTEXT_EXE]); |
3c171f0b LP |
1107 | if (r < 0) |
1108 | log_warning_errno(r, "Failed to get EXE, ignoring: %m"); | |
1109 | ||
92e92d71 | 1110 | if (cg_pid_get_unit(pid, &context[CONTEXT_UNIT]) >= 0) { |
b8cda92d | 1111 | if (!is_journald_crash((const char**) context)) { |
92e92d71 ZJS |
1112 | /* OK, now we know it's not the journal, hence we can make use of it now. */ |
1113 | log_set_target(LOG_TARGET_JOURNAL_OR_KMSG); | |
1114 | log_open(); | |
1115 | } | |
3c171f0b | 1116 | |
c8091d92 | 1117 | /* If this is PID 1 disable coredump collection, we'll unlikely be able to process it later on. */ |
b8cda92d | 1118 | if (is_pid1_crash((const char**) context)) { |
c8091d92 | 1119 | log_notice("Due to PID 1 having crashed coredump collection will now be turned off."); |
e557b1a6 | 1120 | disable_coredumps(); |
c8091d92 LP |
1121 | } |
1122 | ||
92e92d71 | 1123 | set_iovec_field(iovec, n_iovec, "COREDUMP_UNIT=", context[CONTEXT_UNIT]); |
8c8549db | 1124 | } |
803a3464 | 1125 | |
9aa82023 ZJS |
1126 | if (cg_pid_get_user_unit(pid, &t) >= 0) |
1127 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_USER_UNIT=", t); | |
3c171f0b | 1128 | |
9aa82023 ZJS |
1129 | /* The next few are mandatory */ |
1130 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_PID=", context[CONTEXT_PID])) | |
1131 | return log_oom(); | |
3c171f0b | 1132 | |
9aa82023 ZJS |
1133 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_UID=", context[CONTEXT_UID])) |
1134 | return log_oom(); | |
f5e04665 | 1135 | |
9aa82023 ZJS |
1136 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_GID=", context[CONTEXT_GID])) |
1137 | return log_oom(); | |
f5e04665 | 1138 | |
9aa82023 ZJS |
1139 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL])) |
1140 | return log_oom(); | |
f5e04665 | 1141 | |
9aa82023 ZJS |
1142 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT])) |
1143 | return log_oom(); | |
f5e04665 | 1144 | |
f45b8015 JF |
1145 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_HOSTNAME=", context[CONTEXT_HOSTNAME])) |
1146 | return log_oom(); | |
1147 | ||
ea5cc2a8 | 1148 | if (!set_iovec_field(iovec, n_iovec, "COREDUMP_COMM=", context[CONTEXT_COMM])) |
9aa82023 | 1149 | return log_oom(); |
bdfd7b2c | 1150 | |
ea5cc2a8 ZJS |
1151 | if (context[CONTEXT_EXE] && |
1152 | !set_iovec_field(iovec, n_iovec, "COREDUMP_EXE=", context[CONTEXT_EXE])) | |
9aa82023 | 1153 | return log_oom(); |
f5e04665 | 1154 | |
9aa82023 ZJS |
1155 | if (sd_pid_get_session(pid, &t) >= 0) |
1156 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SESSION=", t); | |
f5e04665 | 1157 | |
a035f819 | 1158 | if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) { |
9aa82023 | 1159 | r = asprintf(&t, "COREDUMP_OWNER_UID=" UID_FMT, owner_uid); |
7de80bfe | 1160 | if (r > 0) |
e6a7ec4b | 1161 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); |
f5e04665 LP |
1162 | } |
1163 | ||
9aa82023 ZJS |
1164 | if (sd_pid_get_slice(pid, &t) >= 0) |
1165 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_SLICE=", t); | |
f5e04665 | 1166 | |
9aa82023 ZJS |
1167 | if (get_process_cmdline(pid, 0, false, &t) >= 0) |
1168 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CMDLINE=", t); | |
a035f819 | 1169 | |
9aa82023 ZJS |
1170 | if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) |
1171 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CGROUP=", t); | |
a035f819 | 1172 | |
9aa82023 ZJS |
1173 | if (compose_open_fds(pid, &t) >= 0) |
1174 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_OPEN_FDS=", t); | |
3f132692 JF |
1175 | |
1176 | p = procfs_file_alloca(pid, "status"); | |
9aa82023 ZJS |
1177 | if (read_full_file(p, &t, NULL) >= 0) |
1178 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_STATUS=", t); | |
3f132692 JF |
1179 | |
1180 | p = procfs_file_alloca(pid, "maps"); | |
9aa82023 ZJS |
1181 | if (read_full_file(p, &t, NULL) >= 0) |
1182 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MAPS=", t); | |
3f132692 JF |
1183 | |
1184 | p = procfs_file_alloca(pid, "limits"); | |
9aa82023 ZJS |
1185 | if (read_full_file(p, &t, NULL) >= 0) |
1186 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_LIMITS=", t); | |
3f132692 JF |
1187 | |
1188 | p = procfs_file_alloca(pid, "cgroup"); | |
9aa82023 ZJS |
1189 | if (read_full_file(p, &t, NULL) >=0) |
1190 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_CGROUP=", t); | |
3f132692 | 1191 | |
d7032b1f | 1192 | p = procfs_file_alloca(pid, "mountinfo"); |
9aa82023 ZJS |
1193 | if (read_full_file(p, &t, NULL) >=0) |
1194 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_PROC_MOUNTINFO=", t); | |
d7032b1f | 1195 | |
9aa82023 ZJS |
1196 | if (get_process_cwd(pid, &t) >= 0) |
1197 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CWD=", t); | |
3f132692 JF |
1198 | |
1199 | if (get_process_root(pid, &t) >= 0) { | |
9aa82023 ZJS |
1200 | bool proc_self_root_is_slash; |
1201 | ||
1202 | proc_self_root_is_slash = strcmp(t, "/") == 0; | |
3f132692 | 1203 | |
9aa82023 | 1204 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ROOT=", t); |
7ed03ce6 JF |
1205 | |
1206 | /* If the process' root is "/", then there is a chance it has | |
1207 | * mounted own root and hence being containerized. */ | |
9aa82023 ZJS |
1208 | if (proc_self_root_is_slash && get_process_container_parent_cmdline(pid, &t) > 0) |
1209 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_CONTAINER_CMDLINE=", t); | |
3f132692 JF |
1210 | } |
1211 | ||
9aa82023 ZJS |
1212 | if (get_process_environ(pid, &t) >= 0) |
1213 | set_iovec_field_free(iovec, n_iovec, "COREDUMP_ENVIRON=", t); | |
1214 | ||
4600a396 | 1215 | t = strjoin("COREDUMP_TIMESTAMP=", context[CONTEXT_TIMESTAMP], "000000"); |
9aa82023 | 1216 | if (t) |
e6a7ec4b | 1217 | iovec[(*n_iovec)++] = IOVEC_MAKE_STRING(t); |
9aa82023 | 1218 | |
d14bcb4e LP |
1219 | if (safe_atoi(context[CONTEXT_SIGNAL], &signo) >= 0 && SIGNAL_VALID(signo)) |
1220 | set_iovec_field(iovec, n_iovec, "COREDUMP_SIGNAL_NAME=SIG", signal_to_string(signo)); | |
1221 | ||
92e92d71 | 1222 | return 0; /* we successfully acquired all metadata */ |
9aa82023 | 1223 | } |
3f132692 | 1224 | |
9aa82023 ZJS |
1225 | static int process_kernel(int argc, char* argv[]) { |
1226 | ||
ea5cc2a8 | 1227 | char* context[_CONTEXT_MAX] = {}; |
f45b8015 | 1228 | struct iovec iovec[29 + SUBMIT_COREDUMP_FIELDS]; |
988e89ee | 1229 | size_t i, n_iovec, n_to_free = 0; |
9aa82023 ZJS |
1230 | int r; |
1231 | ||
988e89ee ZJS |
1232 | log_debug("Processing coredump received from the kernel..."); |
1233 | ||
9aa82023 | 1234 | if (argc < CONTEXT_COMM + 1) { |
988e89ee | 1235 | log_error("Not enough arguments passed by the kernel (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); |
9aa82023 | 1236 | return -EINVAL; |
3f132692 JF |
1237 | } |
1238 | ||
ea5cc2a8 ZJS |
1239 | context[CONTEXT_PID] = argv[1 + CONTEXT_PID]; |
1240 | context[CONTEXT_UID] = argv[1 + CONTEXT_UID]; | |
1241 | context[CONTEXT_GID] = argv[1 + CONTEXT_GID]; | |
1242 | context[CONTEXT_SIGNAL] = argv[1 + CONTEXT_SIGNAL]; | |
1243 | context[CONTEXT_TIMESTAMP] = argv[1 + CONTEXT_TIMESTAMP]; | |
1244 | context[CONTEXT_RLIMIT] = argv[1 + CONTEXT_RLIMIT]; | |
f45b8015 | 1245 | context[CONTEXT_HOSTNAME] = argv[1 + CONTEXT_HOSTNAME]; |
9aa82023 | 1246 | |
92e92d71 ZJS |
1247 | r = gather_pid_metadata(context, argv + 1 + CONTEXT_COMM, iovec, &n_to_free); |
1248 | if (r < 0) | |
86562420 | 1249 | goto finish; |
86562420 | 1250 | |
988e89ee | 1251 | n_iovec = n_to_free; |
f5e04665 | 1252 | |
e6a7ec4b | 1253 | iovec[n_iovec++] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_COREDUMP_STR); |
4850d39a LP |
1254 | |
1255 | assert_cc(2 == LOG_CRIT); | |
e6a7ec4b | 1256 | iovec[n_iovec++] = IOVEC_MAKE_STRING("PRIORITY=2"); |
0dc5d23c | 1257 | |
3c171f0b | 1258 | assert(n_iovec <= ELEMENTSOF(iovec)); |
34c10968 | 1259 | |
b8cda92d | 1260 | if (is_journald_crash((const char**) context) || is_pid1_crash((const char**) context)) |
92e92d71 ZJS |
1261 | r = submit_coredump((const char**) context, |
1262 | iovec, ELEMENTSOF(iovec), n_iovec, | |
1263 | STDIN_FILENO); | |
1264 | else | |
1265 | r = send_iovec(iovec, n_iovec, STDIN_FILENO); | |
9aa82023 ZJS |
1266 | |
1267 | finish: | |
1268 | for (i = 0; i < n_to_free; i++) | |
1269 | free(iovec[i].iov_base); | |
1270 | ||
92e92d71 | 1271 | /* Those fields are allocated by gather_pid_metadata */ |
ea5cc2a8 ZJS |
1272 | free(context[CONTEXT_COMM]); |
1273 | free(context[CONTEXT_EXE]); | |
92e92d71 | 1274 | free(context[CONTEXT_UNIT]); |
ea5cc2a8 | 1275 | |
9aa82023 | 1276 | return r; |
3c171f0b | 1277 | } |
34c10968 | 1278 | |
988e89ee | 1279 | static int process_backtrace(int argc, char *argv[]) { |
ea5cc2a8 ZJS |
1280 | char *context[_CONTEXT_MAX] = {}; |
1281 | _cleanup_free_ char *message = NULL; | |
5b45a160 ZJS |
1282 | _cleanup_free_ struct iovec *iovec = NULL; |
1283 | size_t n_iovec, n_allocated, n_to_free = 0, i; | |
988e89ee | 1284 | int r; |
5b45a160 ZJS |
1285 | JournalImporter importer = { |
1286 | .fd = STDIN_FILENO, | |
1287 | }; | |
988e89ee ZJS |
1288 | |
1289 | log_debug("Processing backtrace on stdin..."); | |
1290 | ||
1291 | if (argc < CONTEXT_COMM + 1) { | |
1292 | log_error("Not enough arguments passed (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); | |
1293 | return -EINVAL; | |
1294 | } | |
1295 | ||
ea5cc2a8 ZJS |
1296 | context[CONTEXT_PID] = argv[2 + CONTEXT_PID]; |
1297 | context[CONTEXT_UID] = argv[2 + CONTEXT_UID]; | |
1298 | context[CONTEXT_GID] = argv[2 + CONTEXT_GID]; | |
1299 | context[CONTEXT_SIGNAL] = argv[2 + CONTEXT_SIGNAL]; | |
1300 | context[CONTEXT_TIMESTAMP] = argv[2 + CONTEXT_TIMESTAMP]; | |
1301 | context[CONTEXT_RLIMIT] = argv[2 + CONTEXT_RLIMIT]; | |
f45b8015 | 1302 | context[CONTEXT_HOSTNAME] = argv[2 + CONTEXT_HOSTNAME]; |
988e89ee | 1303 | |
f45b8015 JF |
1304 | n_allocated = 34 + COREDUMP_STORAGE_EXTERNAL; |
1305 | /* 26 metadata, 2 static, +unknown input, 4 storage, rounded up */ | |
5b45a160 ZJS |
1306 | iovec = new(struct iovec, n_allocated); |
1307 | if (!iovec) | |
1308 | return log_oom(); | |
1309 | ||
92e92d71 | 1310 | r = gather_pid_metadata(context, argv + 2 + CONTEXT_COMM, iovec, &n_to_free); |
988e89ee ZJS |
1311 | if (r < 0) |
1312 | goto finish; | |
86562420 LP |
1313 | if (r > 0) { |
1314 | /* This was a special crash, and has already been processed. */ | |
1315 | r = 0; | |
1316 | goto finish; | |
1317 | } | |
5b45a160 | 1318 | n_iovec = n_to_free; |
988e89ee | 1319 | |
86562420 | 1320 | for (;;) { |
5b45a160 ZJS |
1321 | r = journal_importer_process_data(&importer); |
1322 | if (r < 0) { | |
1323 | log_error_errno(r, "Failed to parse journal entry on stdin: %m"); | |
1324 | goto finish; | |
1325 | } | |
d74dc4f2 ZJS |
1326 | if (r == 1 || /* complete entry */ |
1327 | journal_importer_eof(&importer)) /* end of data */ | |
5b45a160 | 1328 | break; |
988e89ee | 1329 | } |
988e89ee | 1330 | |
5b45a160 ZJS |
1331 | if (!GREEDY_REALLOC(iovec, n_allocated, n_iovec + importer.iovw.count + 2)) |
1332 | return log_oom(); | |
1333 | ||
1334 | if (journal_importer_eof(&importer)) { | |
1335 | log_warning("Did not receive a full journal entry on stdin, ignoring message sent by reporter"); | |
988e89ee | 1336 | |
ea5cc2a8 ZJS |
1337 | message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], |
1338 | " (", context[CONTEXT_COMM], ")" | |
5b45a160 ZJS |
1339 | " of user ", context[CONTEXT_UID], |
1340 | " failed with ", context[CONTEXT_SIGNAL]); | |
1341 | if (!message) { | |
1342 | r = log_oom(); | |
1343 | goto finish; | |
1344 | } | |
e6a7ec4b | 1345 | iovec[n_iovec++] = IOVEC_MAKE_STRING(message); |
5b45a160 ZJS |
1346 | } else { |
1347 | for (i = 0; i < importer.iovw.count; i++) | |
1348 | iovec[n_iovec++] = importer.iovw.iovec[i]; | |
1349 | } | |
988e89ee | 1350 | |
e6a7ec4b | 1351 | iovec[n_iovec++] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_BACKTRACE_STR); |
988e89ee | 1352 | assert_cc(2 == LOG_CRIT); |
e6a7ec4b | 1353 | iovec[n_iovec++] = IOVEC_MAKE_STRING("PRIORITY=2"); |
988e89ee | 1354 | |
5b45a160 | 1355 | assert(n_iovec <= n_allocated); |
988e89ee ZJS |
1356 | |
1357 | r = sd_journal_sendv(iovec, n_iovec); | |
1358 | if (r < 0) | |
1359 | log_error_errno(r, "Failed to log backtrace: %m"); | |
1360 | ||
1361 | finish: | |
1362 | for (i = 0; i < n_to_free; i++) | |
1363 | free(iovec[i].iov_base); | |
1364 | ||
92e92d71 | 1365 | /* Those fields are allocated by gather_pid_metadata */ |
ea5cc2a8 ZJS |
1366 | free(context[CONTEXT_COMM]); |
1367 | free(context[CONTEXT_EXE]); | |
92e92d71 | 1368 | free(context[CONTEXT_UNIT]); |
ea5cc2a8 | 1369 | |
988e89ee ZJS |
1370 | return r; |
1371 | } | |
1372 | ||
3c171f0b LP |
1373 | int main(int argc, char *argv[]) { |
1374 | int r; | |
fee80f69 | 1375 | |
9aa82023 ZJS |
1376 | /* First, log to a safe place, since we don't know what crashed and it might |
1377 | * be journald which we'd rather not log to then. */ | |
8d4e028f | 1378 | |
3c171f0b LP |
1379 | log_set_target(LOG_TARGET_KMSG); |
1380 | log_open(); | |
8d4e028f | 1381 | |
3c171f0b LP |
1382 | /* Make sure we never enter a loop */ |
1383 | (void) prctl(PR_SET_DUMPABLE, 0); | |
8d4e028f | 1384 | |
3c171f0b LP |
1385 | /* Ignore all parse errors */ |
1386 | (void) parse_config(); | |
fee80f69 | 1387 | |
3c171f0b LP |
1388 | log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); |
1389 | log_debug("Selected compression %s.", yes_no(arg_compress)); | |
fee80f69 | 1390 | |
3c171f0b LP |
1391 | r = sd_listen_fds(false); |
1392 | if (r < 0) { | |
1393 | log_error_errno(r, "Failed to determine number of file descriptor: %m"); | |
1394 | goto finish; | |
fee80f69 LP |
1395 | } |
1396 | ||
9aa82023 ZJS |
1397 | /* If we got an fd passed, we are running in coredumpd mode. Otherwise we |
1398 | * are invoked from the kernel as coredump handler. */ | |
988e89ee ZJS |
1399 | if (r == 0) { |
1400 | if (streq_ptr(argv[1], "--backtrace")) | |
1401 | r = process_backtrace(argc, argv); | |
1402 | else | |
1403 | r = process_kernel(argc, argv); | |
1404 | } else if (r == 1) | |
3c171f0b LP |
1405 | r = process_socket(SD_LISTEN_FDS_START); |
1406 | else { | |
1407 | log_error("Received unexpected number of file descriptors."); | |
1408 | r = -EINVAL; | |
1409 | } | |
f5e04665 LP |
1410 | |
1411 | finish: | |
f5e04665 LP |
1412 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
1413 | } |