bisecting fixing commit since 4fccc2503536a564a4ba31a1d50439854201659f building syzkaller on 2c36e7a75f8689b3da20e1a81a2ee5391f3af6e5 testing commit 4fccc2503536a564a4ba31a1d50439854201659f compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 67096e9e67fa8fd1ccd3c7e960d02e893fcdfcf9cc3aad7ea4bfdb4eabb6afbc all runs: crashed: kernel panic: audit: rate limit exceeded testing current HEAD 4938296e03bd227e5020d63d418956fe52baf97c testing commit 4938296e03bd227e5020d63d418956fe52baf97c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: f831ed4c9c24cebdd41908104748ff0b6546b26fb7e245062df6acea6bd86ca2 all runs: crashed: kernel panic: audit: rate limit exceeded revisions tested: 2, total time: 29m46.76141837s (build: 22m13.509574146s, test: 7m2.530846163s) the crash still happens on HEAD commit msg: Linux 4.19.198 crash: kernel panic: audit: rate limit exceeded audit: type=1305 audit(1627101481.773:2): audit_failure=2 old=1 auid=4294967295 ses=4294967295 subj==unconfined res=1 audit: audit_lost=1 audit_rate_limit=2 audit_backlog_limit=0 audit: type=1305 audit(1627101481.783:3): audit_pid=0 old=0 auid=4294967295 ses=4294967295 subj==unconfined res=1 audit: audit_lost=2 audit_rate_limit=2 audit_backlog_limit=0 audit: type=1305 audit(1627101481.783:4): audit_rate_limit=2 old=0 auid=4294967295 ses=4294967295 subj==unconfined res=1 Kernel panic - not syncing: audit: rate limit exceeded CPU: 0 PID: 5902 Comm: syz-executor.0 Not tainted 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 audit: type=1305 audit(1627101481.783:5): audit_backlog_limit=0 old=64 auid=4294967295 ses=4294967295 subj==unconfined res=1 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x123/0x171 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 kernel/audit.c:390 [inline] audit_log_lost+0x57/0x120 kernel/audit.c:362 audit_log_end+0x1cf/0x240 kernel/audit.c:2368 audit_log+0xae/0xf0 kernel/audit.c:2396 audit: type=1325 audit(1627101481.803:6): table=filter family=3 entries=0 xt_replace_table+0x55b/0x750 net/netfilter/x_tables.c:1414 audit: type=1325 audit(1627101481.803:7): table=filter family=2 entries=0 xt_register_table+0x253/0x530 net/netfilter/x_tables.c:1453 ipt_register_table+0x182/0x2d0 net/ipv4/netfilter/ip_tables.c:1781 iptable_nat_table_init.part.1+0x4d/0x150 net/ipv4/netfilter/iptable_nat.c:104 iptable_nat_table_init+0x3d/0x50 net/ipv4/netfilter/iptable_nat.c:119 xt_find_table_lock+0x206/0x370 net/netfilter/x_tables.c:1224 xt_request_find_table_lock+0x1c/0xa0 net/netfilter/x_tables.c:1254 get_info+0x10b/0x470 net/ipv6/netfilter/ip6_tables.c:984 do_ipt_get_ctl+0x12e/0x710 net/ipv4/netfilter/ip_tables.c:1701 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x5f/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt net/ipv4/ip_sockglue.c:1574 [inline] ip_getsockopt+0xf9/0x130 net/ipv4/ip_sockglue.c:1554 tcp_getsockopt net/ipv4/tcp.c:3629 [inline] tcp_getsockopt+0x6a/0xd0 net/ipv4/tcp.c:3623 sock_common_getsockopt+0x73/0xf0 net/core/sock.c:3031 __sys_getsockopt+0x12e/0x1f0 net/socket.c:2048 __do_sys_getsockopt net/socket.c:2059 [inline] __se_sys_getsockopt net/socket.c:2056 [inline] __x64_sys_getsockopt+0xb9/0x150 net/socket.c:2056 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x46539a Code: 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcec5e8398 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000046539a RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000003 R08: 00007ffcec5e83cc R09: 0000000000000278 R10: 000000000050c5a8 R11: 0000000000000246 R12: 00007ffcec5e83cc R13: 00000000004b5e8c R14: 000000000050c5a8 R15: 000000000050c5a0 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..