kernel panic: audit: backlog limit exceeded

Status: closed as invalid on 2020/02/27 15:40
Subsystems: audit
[Documentation on labels]
Reported-by: syzbot+9a5e789e4725b9ef1316@syzkaller.appspotmail.com
First crash: 2346d, last: 2345d
Cause bisection: introduced by (bisect log) :
commit 0c1b9970ddd4cc41002321c3877e7f91aacb896d
Author: Dan Carpenter <dan.carpenter@oracle.com>
Date: Fri Jul 28 14:42:27 2017 +0000

  staging: lustre: lustre: Off by two in lmv_fid2path()

Crash: general protection fault in batadv_iv_ogm_queue_add (log)
Repro: C syz .config
  
▶ ▼ Duplicate bugs (2)
Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
kernel panic: audit: out of memory in audit_log_start audit 2 1 2344d 2344d 0/29 closed as dup on 2020/02/27 15:42
kernel panic: audit: rate limit exceeded audit 2 C done 5 2344d 2344d 0/29 closed as dup on 2020/02/27 15:41
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
kernel panic: audit: backlog limit exceeded 11 (12) 2020/03/02 14:25
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 kernel panic: audit: backlog limit exceeded 2 C error 2 1769d 2346d 0/1 upstream: reported C repro on 2020/02/22 16:58
linux-4.14 kernel panic: audit: backlog limit exceeded 2 C inconclusive 2 2254d 2344d 0/1 upstream: reported C repro on 2020/02/24 09:05
android-54 kernel panic: audit: backlog limit exceeded 2 C 3 2344d 2346d 0/2 closed as invalid on 2020/02/27 15:45

Sample crash report:
Kernel panic - not syncing: audit: backlog limit exceeded
CPU: 1 PID: 8878 Comm: syz-executor927 Not tainted 5.6.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 panic+0x264/0x7a9 kernel/panic.c:221
 audit_panic kernel/audit.c:307 [inline]
 audit_log_lost+0x1d7/0x1e0 kernel/audit.c:377
 audit_log_start+0x3d1/0x820 kernel/audit.c:1796
 audit_log+0x4a/0xc0 kernel/audit.c:2345
 xt_replace_table+0x61b/0x7a0 net/netfilter/x_tables.c:1413
 __do_replace+0x11b/0x970 net/ipv6/netfilter/ip6_tables.c:1084
 do_replace net/ipv6/netfilter/ip6_tables.c:1157 [inline]
 do_ip6t_set_ctl+0x363/0x550 net/ipv6/netfilter/ip6_tables.c:1681
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x27a/0x2a0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0x9a/0x160 net/ipv6/ipv6_sockglue.c:949
 tcp_setsockopt+0xbe/0xd0 net/ipv4/tcp.c:3165
 sock_common_setsockopt+0x99/0xb0 net/core/sock.c:3149
 __sys_setsockopt+0x582/0x720 net/socket.c:2130
 __do_sys_setsockopt net/socket.c:2146 [inline]
 __se_sys_setsockopt net/socket.c:2143 [inline]
 __x64_sys_setsockopt+0xbf/0xd0 net/socket.c:2143
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44720a
Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 1a e0 fb ff c3 66 0f 1f 84 00 00 00 00 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 fa df fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007ffddd72bbf8 EFLAGS: 00000282 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000044720a
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007ffddd72bd20 R08: 00000000000003b8 R09: 0000000000004000
R10: 00000000006d7b40 R11: 0000000000000282 R12: 00007ffddd72bc20
R13: 00000000006d9d60 R14: 0000000000000029 R15: 00000000006d7ba0
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/02/23 08:11 upstream 54dedb5b571d 2c36e7a7 .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/02/23 01:29 upstream 54dedb5b571d 2c36e7a7 .config console log report syz C ci-upstream-kasan-gce-smack-root
2020/02/22 07:41 net-old 36a44bcdd8df 2ffa6679 .config console log report syz C ci-upstream-net-this-kasan-gce
2020/02/22 03:28 net-old 36a44bcdd8df 2ffa6679 .config console log report syz C ci-upstream-net-this-kasan-gce
2020/02/22 08:32 net-next-old 5f9721a2d119 2ffa6679 .config console log report syz C ci-upstream-net-kasan-gce
2020/02/22 04:18 net-next-old 5f9721a2d119 2ffa6679 .config console log report syz C ci-upstream-net-kasan-gce
* Struck through repros no longer work on HEAD.