bisecting fixing commit since 4fccc2503536a564a4ba31a1d50439854201659f building syzkaller on 2c36e7a75f8689b3da20e1a81a2ee5391f3af6e5 testing commit 4fccc2503536a564a4ba31a1d50439854201659f with gcc (GCC) 8.1.0 kernel signature: 8126bd9bccafd7ccad3ce8b0e6f01f13fe983c356870062c60aa0d26e44883ef all runs: crashed: kernel panic: audit: rate limit exceeded testing current HEAD 1bab61d3e8cd96f2badf515dcb06e4e1029bc017 testing commit 1bab61d3e8cd96f2badf515dcb06e4e1029bc017 with gcc (GCC) 8.1.0 kernel signature: 47ac63fc3281cb025a6bcc08971a8a448788dd99c81f5f22617e4efcad0614f0 all runs: crashed: kernel panic: audit: rate limit exceeded revisions tested: 2, total time: 24m43.924627721s (build: 18m22.896541613s, test: 6m2.245667552s) the crash still happens on HEAD commit msg: Linux 4.19.124 crash: kernel panic: audit: rate limit exceeded IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready audit: audit_lost=1 audit_rate_limit=2 audit_backlog_limit=0 audit: type=1305 audit(1590272418.369:12): audit_pid=0 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: 6619 Comm: syz-executor.4 Not tainted 4.19.124-syzkaller #0 audit: type=1305 audit(1590272418.369:13): audit_rate_limit=2 old=0 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 audit: type=1305 audit(1590272418.369:14): audit_backlog_limit=0 old=64 auid=0 ses=8 subj=system_u:system_r:kernel_t:s0 res=1 Call Trace: __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_log_end+0x1cf/0x240 kernel/audit.c:2360 audit_log+0xae/0xf0 kernel/audit.c:2388 audit: type=1325 audit(1590272418.399:15): table=filter family=2 entries=4 audit: type=1325 audit(1590272418.399:16): table=nat family=2 entries=5 xt_replace_table+0x555/0x750 net/netfilter/x_tables.c:1418 __do_replace+0x1a9/0x990 net/ipv4/netfilter/ip_tables.c:1070 do_replace net/ipv4/netfilter/ip_tables.c:1143 [inline] do_ipt_set_ctl+0x27e/0x3e5 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5c/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x59/0x70 net/ipv4/ip_sockglue.c:1258 tcp_setsockopt+0x6a/0xd0 net/ipv4/tcp.c:3095 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 sock_common_setsockopt+0x73/0xf0 net/core/sock.c:3049 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! __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: 0033:0x45ef5a Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6a 8b 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 4a 8b fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007fff6a423de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fff6a423e10 RCX: 000000000045ef5a RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 000000000071fe80 R08: 0000000000000408 R09: 0000000000004000 R10: 000000000071eaa0 R11: 0000000000000206 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000000 R15: 000000000071ea40 Kernel Offset: disabled Rebooting in 86400 seconds..