diff options
author | Costa Tsaousis <costa@netdata.cloud> | 2023-09-19 22:12:06 +0300 |
---|---|---|
committer | GitHub <noreply@github.com> | 2023-09-19 22:12:06 +0300 |
commit | 541facfa3e5021ebc5c7fb8944987f3a3a02d48a (patch) | |
tree | 4bb6a70a73a942f0a36c4547c10395c87c2a2c2d /collectors/systemd-journal.plugin | |
parent | 83c48807de20f299c58c9873894aad9889af3b24 (diff) |
Systemd-Journal: fix crash when the uid or gid do not have names (#16015)
Diffstat (limited to 'collectors/systemd-journal.plugin')
-rw-r--r-- | collectors/systemd-journal.plugin/systemd-journal.c | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/collectors/systemd-journal.plugin/systemd-journal.c b/collectors/systemd-journal.plugin/systemd-journal.c index 6efbb57550..522c127bde 100644 --- a/collectors/systemd-journal.plugin/systemd-journal.c +++ b/collectors/systemd-journal.plugin/systemd-journal.c @@ -511,23 +511,25 @@ static FACET_ROW_SEVERITY syslog_priority_to_facet_severity(int priority) { static char *uid_to_username(uid_t uid, char *buffer, size_t buffer_size) { static __thread char tmp[1024 + 1]; - struct passwd pw, *result; + struct passwd pw, *result = NULL; - if (getpwuid_r(uid, &pw, tmp, 1024, &result) != 0 || result == NULL) - return NULL; + if (getpwuid_r(uid, &pw, tmp, sizeof(tmp), &result) != 0 || !result || !pw.pw_name || !(*pw.pw_name)) + snprintfz(buffer, buffer_size - 1, "%u", uid); + else + snprintfz(buffer, buffer_size - 1, "%u (%s)", uid, pw.pw_name); - snprintfz(buffer, buffer_size - 1, "%u (%s)", uid, pw.pw_name); return buffer; } static char *gid_to_groupname(gid_t gid, char* buffer, size_t buffer_size) { - static __thread char tmp[1024 + 1]; - struct group grp, *result; + static __thread char tmp[1024]; + struct group grp, *result = NULL; - if (getgrgid_r(gid, &grp, tmp, 1024, &result) != 0 || result == NULL) - return NULL; + if (getgrgid_r(gid, &grp, tmp, sizeof(tmp), &result) != 0 || !result || !grp.gr_name || !(*grp.gr_name)) + snprintfz(buffer, buffer_size - 1, "%u", gid); + else + snprintfz(buffer, buffer_size - 1, "%u (%s)", gid, grp.gr_name); - snprintfz(buffer, buffer_size - 1, "%u (%s)", gid, grp.gr_name); return buffer; } @@ -560,7 +562,7 @@ static void netdata_systemd_journal_transform_priority(FACETS *facets __maybe_un // ---------------------------------------------------------------------------- // UID and GID transformation -#define UID_GID_HASHTABLE_SIZE 1000 +#define UID_GID_HASHTABLE_SIZE 10000 struct word_t2str_hashtable_entry { struct word_t2str_hashtable_entry *next; @@ -598,8 +600,8 @@ const char *uid_to_username_cached(uid_t uid, size_t *length) { struct word_t2str_hashtable_entry **e = word_t2str_hashtable_slot(&uid_hashtable, uid); if(!(*e)) { - static __thread char buf[1024 + 1]; - const char *name = uid_to_username(uid, buf, 1024); + static __thread char buf[1024]; + const char *name = uid_to_username(uid, buf, sizeof(buf)); size_t size = strlen(name) + 1; *e = callocz(1, sizeof(struct word_t2str_hashtable_entry) + size); @@ -619,8 +621,8 @@ const char *gid_to_groupname_cached(gid_t gid, size_t *length) { struct word_t2str_hashtable_entry **e = word_t2str_hashtable_slot(&gid_hashtable, gid); if(!(*e)) { - static __thread char buf[1024 + 1]; - const char *name = gid_to_groupname(gid, buf, 1024); + static __thread char buf[1024]; + const char *name = gid_to_groupname(gid, buf, sizeof(buf)); size_t size = strlen(name) + 1; *e = callocz(1, sizeof(struct word_t2str_hashtable_entry) + size); |