bisecting fixing commit since 4fccc2503536a564a4ba31a1d50439854201659f building syzkaller on 2c36e7a75f8689b3da20e1a81a2ee5391f3af6e5 testing commit 4fccc2503536a564a4ba31a1d50439854201659f with gcc (GCC) 8.1.0 kernel signature: e4c837dd01a4f9c4414a8fd13b3feca812cb323577de145a77431bcbc59a3813 all runs: crashed: kernel panic: audit: rate limit exceeded testing current HEAD ad326970d25cc85128cd22d62398751ad072efff testing commit ad326970d25cc85128cd22d62398751ad072efff with gcc (GCC) 8.1.0 kernel signature: 89924958c06b1825b8f866d3f4f87e763bdb3530bd9af08539dda8b6aa387223 all runs: crashed: kernel panic: audit: rate limit exceeded revisions tested: 2, total time: 26m36.933638921s (build: 19m25.667112243s, test: 6m12.459251253s) the crash still happens on HEAD commit msg: Linux 4.19.152 crash: kernel panic: audit: rate limit exceeded audit: type=1305 audit(1603244639.260:12): audit_pid=0 old=0 auid=0 ses=8 subj=system_u:system_r:kernel_t:s0 res=1 IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready batman_adv: batadv0: Interface activated: batadv_slave_0 audit: audit_lost=1 audit_rate_limit=2 audit_backlog_limit=0 audit: type=1305 audit(1603244639.260:13): audit_rate_limit=2 old=0 auid=0 ses=8 subj=system_u:system_r:kernel_t:s0 res=1 Kernel panic - not syncing: audit: rate limit exceeded CPU: 1 PID: 6607 Comm: syz-executor.3 Not tainted 4.19.152-syzkaller #0 audit: type=1305 audit(1603244639.260:14): audit_backlog_limit=0 old=64 auid=0 ses=8 subj=system_u:system_r:kernel_t:s0 res=1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: audit: type=1325 audit(1603244639.330:15): table=filter family=10 entries=4 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x177 lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 audit_panic.cold.22+0x28/0x28 kernel/audit.c:320 audit_log_lost+0x57/0x120 kernel/audit.c:390 audit: type=1325 audit(1603244639.330:16): table=mangle family=10 entries=6 audit_log_end+0x1cf/0x240 kernel/audit.c:2368 audit_log+0xae/0xf0 kernel/audit.c:2396 audit: audit_lost=2 audit_rate_limit=2 audit_backlog_limit=0 xt_replace_table+0x555/0x750 net/netfilter/x_tables.c:1418 __do_replace+0x1a9/0x9b0 net/ipv6/netfilter/ip6_tables.c:1087 do_replace net/ipv6/netfilter/ip6_tables.c:1160 [inline] do_ip6t_set_ctl+0x27e/0x3eb net/ipv6/netfilter/ip6_tables.c:1684 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5c/0xb0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x95/0xf0 net/ipv6/ipv6_sockglue.c:945 tcp_setsockopt+0x6a/0xd0 net/ipv4/tcp.c:3095 sock_common_setsockopt+0x73/0xf0 net/core/sock.c:3072 __sys_setsockopt+0x13e/0x210 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xb9/0x150 net/socket.c:1909 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45efda Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ea 8a 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 ca 8a fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ffd9c76f1c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ffd9c76f1f0 RCX: 000000000045efda RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 000000000071dcc0 R08: 00000000000002e8 R09: 0000000000004000 R10: 000000000071cfa0 R11: 0000000000000202 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000029 R15: 000000000071cf40 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..