kernel panic: audit: out of memory in audit_log

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
kernel panic: audit: backlog limit exceeded audit	C	done		6	1735d	1734d

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	kernel panic: audit: out of memory in audit_log_start				1	1734d	1734d	0/1	auto-closed as invalid on 2020/06/23 08:51
android-54	kernel panic: audit: out of memory in audit_log_start				3	1733d	1736d	0/2	closed as invalid on 2020/02/27 15:45

R13: 00000000000008e1 R14: 00000000004cb435 R15: 0000000000000004
audit: audit_lost=1 audit_rate_limit=0 audit_backlog_limit=64
Kernel panic - not syncing: audit: out of memory in audit_log_start
CPU: 1 PID: 14040 Comm: syz-executor.4 Not tainted 5.6.0-rc2-next-20200221-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+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 audit_panic.cold+0x32/0x32 kernel/audit.c:307
 audit_log_lost kernel/audit.c:377 [inline]
 audit_log_lost+0x8b/0x180 kernel/audit.c:349
 audit_log_start kernel/audit.c:1796 [inline]
 audit_log_start+0x5ca/0x7a0 kernel/audit.c:1745
 audit_log_config_change+0x60/0xf0 kernel/audit.c:387
 audit_do_config_change+0xe4/0x100 kernel/audit.c:412
 audit_set_enabled+0x3b/0x90 kernel/audit.c:448
 audit_receive_msg+0x14e4/0x28b0 kernel/audit.c:1216
 audit_receive+0x114/0x230 kernel/audit.c:1513
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x59e/0x7e0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x91c/0xea0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:672
 ____sys_sendmsg+0x753/0x880 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2430
 __do_sys_sendmsg net/socket.c:2439 [inline]
 __se_sys_sendmsg net/socket.c:2437 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2437
 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c429
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fda293e6c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fda293e76d4 RCX: 000000000045c429
RDX: 0000000000000000 RSI: 0000000020000dc0 RDI: 0000000000000004
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005
R13: 00000000000008e1 R14: 00000000004cb435 R15: 0000000000000004
Kernel Offset: disabled
Rebooting in 86400 seconds..