Hello,
The following auditd segfault occurs during shutdown but can be
reproduced using the service stop command...
service auditd stop 2root@aug-test:/# 2021 Aug 4 12:47:22 aug-test Process 687 (auditd) of user 0 dumped core. 3 4Stack trace of thread 687: 5#0 0x00007f18bb1657e4 fclose (libc.so.6) 6#1 0x000055b88ab50ec0 n/a (auditd) 7#2 0x000055b88ab4e421 n/a (auditd) 8#3 0x000055b88ab4d9a7 n/a (auditd) 9#4 0x00007f18bb11a09b __libc_start_main (libc.so.6) 10#5 0x000055b88ab4df4a n/a (auditd)
Setting AUDIT_WRITE_LOGS to "yes" corrects this problem however we have a requirement to disable these logs (i.e. AUDIT_WRITE_LOGS needs to be set to "no")
After perusing the source I suspect that one of these unconditional fclose()s is causing the problem...
git diff ./src/aureport.c diff --git a/src/aureport.c b/src/aureport.c index 22618f0..6359144 100644 --- a/src/aureport.c +++ b/src/aureport.c @@ -277,7 +277,8 @@ static int process_log_fd(const char *filename) list_clear(entries); free(entries); } while (ret == 0); - fclose(log_fd); + if (log_fd) + fclose(log_fd); // This is the per file action items very_last_event.sec = last_event.sec; very_last_event.milli = last_event.milli;
git diff ./src/ausearch.c
diff --git a/src/ausearch.c b/src/ausearch.c
index 4a6bdae..df14df5 100644
--- a/src/ausearch.c
+++ b/src/ausearch.c
@@ -481,7 +481,8 @@ static int process_log_fd(void)
checkpt_failure |= CP_CORRUPTED;
list_clear(entries);
free(entries);
- fclose(log_fd);
+ if (log_fd)
+ fclose(log_fd);
return 10;
}
if (just_one) {
@@ -497,7 +498,8 @@ static int process_log_fd(void)
if (set_ChkPtLastEvent(&entries->e)) {
list_clear(entries);
free(entries);
- fclose(log_fd);
+ if (log_fd)
+ fclose(log_fd);
return 4; /* no memory */
}
}
@@ -505,7 +507,8 @@ static int process_log_fd(void)
list_clear(entries);
free(entries);
} while (ret == 0);
- fclose(log_fd);
+ if (log_fd)
+ fclose(log_fd);
return 0;
}
However I have not tested these changes. Even though this is a
benign problem I believe that it warrants a correction. Please
open a ticket and respond with the ticket id so that we can track
this problem/solution.
-- Kind Regards, Thomas Brown Linux Developer EPS PBU RT Solution Services 411 Leggett Drive Suite 502 Kanata, ON, Canada K2K 3C9 Tel: 613-963-1016 Fax: 613-599-1060