[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 80.065617][ T27] audit: type=1800 audit(1578707685.967:25): pid=9124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 80.093732][ T27] audit: type=1800 audit(1578707685.967:26): pid=9124 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 80.143179][ T27] audit: type=1800 audit(1578707685.967:27): pid=9124 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 '10.128.0.188' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 103.972281][ T9280] kasan: CONFIG_KASAN_INLINE enabled [ 103.977791][ T9280] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 103.985893][ T9280] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 103.992820][ T9280] CPU: 1 PID: 9280 Comm: syz-executor597 Not tainted 5.5.0-rc5-syzkaller #0 [ 104.001468][ T9280] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 104.011508][ T9280] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 104.016856][ T9280] Code: 85 87 01 fb 45 84 f6 0f 84 68 02 00 00 e8 37 86 01 fb 49 8d bd 68 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6c 03 00 00 4d 8b b5 68 13 00 00 e8 29 bf ed fa [ 104.036435][ T9280] RSP: 0018:ffffc90001e97940 EFLAGS: 00010202 [ 104.042487][ T9280] RAX: dffffc0000000000 RBX: ffff8880a6bf7400 RCX: ffffffff8673a332 [ 104.050440][ T9280] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 104.058401][ T9280] RBP: ffffc90001e97970 R08: ffff888092c44640 R09: ffffed1015d2703d [ 104.066468][ T9280] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 104.074417][ T9280] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 104.082364][ T9280] FS: 00000000012a9940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 104.091277][ T9280] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.097849][ T9280] CR2: 00000000200008c0 CR3: 0000000092ec8000 CR4: 00000000001406e0 [ 104.105809][ T9280] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 104.113756][ T9280] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 104.121702][ T9280] Call Trace: [ 104.124989][ T9280] ? xt_rateest_put+0x440/0x440 [ 104.129816][ T9280] xt_rateest_tg_destroy+0x72/0xa0 [ 104.134905][ T9280] ? xt_percpu_counter_free+0x8f/0xd0 [ 104.140255][ T9280] translate_table+0x11f4/0x1d80 [ 104.145174][ T9280] ? arpt_alloc_initial_table+0x690/0x690 [ 104.150889][ T9280] ? lock_downgrade+0x920/0x920 [ 104.155724][ T9280] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 104.161953][ T9280] ? _copy_from_user+0x12c/0x1a0 [ 104.166872][ T9280] do_arpt_set_ctl+0x317/0x650 [ 104.171679][ T9280] ? __do_replace+0xa80/0xa80 [ 104.176343][ T9280] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 104.181903][ T9280] ? ___might_sleep+0x163/0x2c0 [ 104.186735][ T9280] ? wait_for_completion+0x440/0x440 [ 104.192039][ T9280] ? mutex_unlock+0xd/0x10 [ 104.196440][ T9280] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 104.202403][ T9280] nf_setsockopt+0x77/0xd0 [ 104.206841][ T9280] ip_setsockopt+0xdf/0x100 [ 104.211322][ T9280] udp_setsockopt+0x68/0xb0 [ 104.215840][ T9280] sock_common_setsockopt+0x94/0xd0 [ 104.221032][ T9280] __sys_setsockopt+0x261/0x4c0 [ 104.225860][ T9280] ? sock_create_kern+0x50/0x50 [ 104.230691][ T9280] ? down_read_non_owner+0x490/0x490 [ 104.235962][ T9280] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 104.242180][ T9280] ? handle_mm_fault+0x4ab/0xa50 [ 104.247143][ T9280] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 104.252577][ T9280] ? do_syscall_64+0x26/0x790 [ 104.257229][ T9280] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.263271][ T9280] ? do_syscall_64+0x26/0x790 [ 104.267928][ T9280] __x64_sys_setsockopt+0xbe/0x150 [ 104.273065][ T9280] do_syscall_64+0xfa/0x790 [ 104.277547][ T9280] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.283415][ T9280] RIP: 0033:0x448539 [ 104.287289][ T9280] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 104.306876][ T9280] RSP: 002b:00007ffff2a31f48 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 104.315286][ T9280] RAX: ffffffffffffffda RBX: 00007ffff2a31f50 RCX: 0000000000448539 [ 104.323237][ T9280] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 104.331219][ T9280] RBP: 0000000000000000 R08: 0000000000000430 R09: 0000000000408b80 [ 104.339168][ T9280] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000409dc0 [ 104.347204][ T9280] R13: 0000000000409e50 R14: 0000000000000000 R15: 0000000000000000 [ 104.355159][ T9280] Modules linked in: [ 104.359502][ T9280] ---[ end trace 62eb2ef1eb3f7323 ]--- [ 104.365039][ T9280] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 104.370391][ T9280] Code: 85 87 01 fb 45 84 f6 0f 84 68 02 00 00 e8 37 86 01 fb 49 8d bd 68 13 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 6c 03 00 00 4d 8b b5 68 13 00 00 e8 29 bf ed fa [ 104.390006][ T9280] RSP: 0018:ffffc90001e97940 EFLAGS: 00010202 [ 104.396075][ T9280] RAX: dffffc0000000000 RBX: ffff8880a6bf7400 RCX: ffffffff8673a332 [ 104.404059][ T9280] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 104.412023][ T9280] RBP: ffffc90001e97970 R08: ffff888092c44640 R09: ffffed1015d2703d [ 104.420004][ T9280] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 104.427998][ T9280] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 104.435976][ T9280] FS: 00000000012a9940(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 104.444912][ T9280] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.451469][ T9280] CR2: 00000000200008c0 CR3: 0000000092ec8000 CR4: 00000000001406e0 [ 104.459477][ T9280] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 104.467567][ T9280] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 104.475593][ T9280] Kernel panic - not syncing: Fatal exception [ 104.483010][ T9280] Kernel Offset: disabled [ 104.487332][ T9280] Rebooting in 86400 seconds..