kernel panic: audit: out of memory in audit_log

Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported
kernel panic: audit: backlog limit exceeded audit	2	syz, C	done		6	2361d	2360d

Title

Rank 🛈

Repro

kernel panic: audit: backlog limit exceeded audit

syz, C

done

2361d

2360d

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	kernel panic: audit: out of memory in audit_log_start	2				1	2360d	2360d	0/1	auto-closed as invalid on 2020/06/23 08:51
android-54	kernel panic: audit: out of memory in audit_log_start	2				3	2360d	2363d	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..