[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.939204][ T27] audit: type=1800 audit(1563666622.696:25): pid=8857 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.978101][ T27] audit: type=1800 audit(1563666622.696:26): pid=8857 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.018255][ T27] audit: type=1800 audit(1563666622.696:27): pid=8857 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.217' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 101.505910][ T9012] ------------[ cut here ]------------ [ 101.511962][ T9012] WARNING: CPU: 1 PID: 9012 at net/netfilter/x_tables.c:649 xt_compat_add_offset.cold+0x11/0x36 [ 101.522362][ T9012] Kernel panic - not syncing: panic_on_warn set ... [ 101.528942][ T9012] CPU: 1 PID: 9012 Comm: syz-executor131 Not tainted 5.2.0+ #64 [ 101.536598][ T9012] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.546647][ T9012] Call Trace: [ 101.549938][ T9012] dump_stack+0x172/0x1f0 [ 101.554266][ T9012] ? xt_compat_target_to_user+0x340/0x3db [ 101.559986][ T9012] panic+0x2dc/0x755 [ 101.563863][ T9012] ? add_taint.cold+0x16/0x16 [ 101.568593][ T9012] ? __kasan_check_write+0x14/0x20 [ 101.573699][ T9012] ? __warn.cold+0x5/0x4c [ 101.578018][ T9012] ? __warn+0xe7/0x1e0 [ 101.582081][ T9012] ? xt_compat_add_offset.cold+0x11/0x36 [ 101.587702][ T9012] __warn.cold+0x20/0x4c [ 101.591935][ T9012] ? xt_compat_add_offset.cold+0x11/0x36 [ 101.597559][ T9012] report_bug+0x263/0x2b0 [ 101.601883][ T9012] do_error_trap+0x11b/0x200 [ 101.606521][ T9012] do_invalid_op+0x37/0x50 [ 101.610961][ T9012] ? xt_compat_add_offset.cold+0x11/0x36 [ 101.616648][ T9012] invalid_op+0x14/0x20 [ 101.620854][ T9012] RIP: 0010:xt_compat_add_offset.cold+0x11/0x36 [ 101.627085][ T9012] Code: 89 ee 48 c7 c7 c0 29 2d 88 e8 0c 76 7b fb 41 bc ea ff ff ff e9 87 88 ff ff e8 08 d3 91 fb 48 c7 c7 00 2a 2d 88 e8 f0 75 7b fb <0f> 0b 41 bc f4 ff ff ff e9 01 8b ff ff e8 ea d2 91 fb 48 c7 c7 00 [ 101.646770][ T9012] RSP: 0018:ffff8880a382f8d8 EFLAGS: 00010286 [ 101.652822][ T9012] RAX: 0000000000000024 RBX: ffff888216b74ad0 RCX: 0000000000000000 [ 101.660781][ T9012] RDX: 0000000000000000 RSI: ffffffff815c3a26 RDI: ffffed1014705f0d [ 101.668742][ T9012] RBP: ffff8880a382f908 R08: 0000000000000024 R09: ffffed1015d260b1 [ 101.676705][ T9012] R10: ffffed1015d260b0 R11: ffff8880ae930587 R12: 0000000000000014 [ 101.684678][ T9012] R13: 0000000000000060 R14: ffff88808b7b6180 R15: 0000000000000000 [ 101.692667][ T9012] ? vprintk_func+0x86/0x189 [ 101.697253][ T9012] ? xt_compat_add_offset.cold+0x11/0x36 [ 101.702871][ T9012] ? xt_request_find_target+0x68/0x110 [ 101.708318][ T9012] compat_copy_entries+0x10e9/0x1340 [ 101.713607][ T9012] ? compat_table_info+0x670/0x670 [ 101.718719][ T9012] compat_do_replace+0x3b3/0x680 [ 101.723651][ T9012] ? refcount_dec_not_one+0x1f0/0x1f0 [ 101.729014][ T9012] ? do_ebt_set_ctl+0x110/0x110 [ 101.733856][ T9012] ? refcount_dec_and_test_checked+0x1b/0x20 [ 101.739827][ T9012] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 101.746064][ T9012] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 101.752296][ T9012] ? ns_capable_common+0x93/0x100 [ 101.757430][ T9012] compat_do_ebt_set_ctl+0x22f/0x27e [ 101.762705][ T9012] ? compat_do_replace+0x680/0x680 [ 101.767798][ T9012] ? wait_for_completion+0x440/0x440 [ 101.773072][ T9012] ? mutex_unlock+0xd/0x10 [ 101.777479][ T9012] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 101.783458][ T9012] compat_nf_setsockopt+0x98/0x140 [ 101.791053][ T9012] ? compat_do_replace+0x680/0x680 [ 101.796808][ T9012] compat_ip_setsockopt+0x106/0x140 [ 101.802039][ T9012] compat_raw_setsockopt+0xe0/0x100 [ 101.807234][ T9012] compat_sock_common_setsockopt+0xb2/0x140 [ 101.813115][ T9012] ? raw_seticmpfilter+0x90/0x90 [ 101.818052][ T9012] __compat_sys_setsockopt+0x185/0x380 [ 101.823498][ T9012] ? sock_common_setsockopt+0xd0/0xd0 [ 101.828855][ T9012] ? __compat_sys_getsockopt+0x2c0/0x2c0 [ 101.834485][ T9012] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 101.839964][ T9012] ? do_fast_syscall_32+0xd1/0xdb3 [ 101.845064][ T9012] ? entry_SYSENTER_compat+0x70/0x7f [ 101.850329][ T9012] ? do_fast_syscall_32+0xd1/0xdb3 [ 101.855471][ T9012] __ia32_compat_sys_setsockopt+0xbd/0x150 [ 101.861277][ T9012] do_fast_syscall_32+0x27b/0xdb3 [ 101.866300][ T9012] entry_SYSENTER_compat+0x70/0x7f [ 101.871404][ T9012] RIP: 0023:0xf7f489c9 [ 101.875464][ T9012] Code: d3 83 c4 10 5b 5e 5d c3 ba 80 96 98 00 eb a9 8b 04 24 c3 8b 34 24 c3 8b 3c 24 c3 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 101.895664][ T9012] RSP: 002b:00000000ffaa6d8c EFLAGS: 00000292 ORIG_RAX: 000000000000016e [ 101.904071][ T9012] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 [ 101.912033][ T9012] RDX: 0000000000000080 RSI: 0000000020000000 RDI: 00000000000001fc [ 101.920109][ T9012] RBP: 0000000000000012 R08: 0000000000000000 R09: 0000000000000000 [ 101.928061][ T9012] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 101.936015][ T9012] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 101.945090][ T9012] Kernel Offset: disabled [ 101.949468][ T9012] Rebooting in 86400 seconds..