[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 78.829394][ T27] audit: type=1800 audit(1578701634.985:25): pid=9549 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 78.849345][ T27] audit: type=1800 audit(1578701634.995:26): pid=9549 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 78.884116][ T27] audit: type=1800 audit(1578701634.995:27): pid=9549 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 '10.128.0.203' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.157656][ T9705] kasan: CONFIG_KASAN_INLINE enabled [ 92.163080][ T9705] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 92.171498][ T9705] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 92.178432][ T9705] CPU: 0 PID: 9705 Comm: syz-executor725 Not tainted 5.5.0-rc5-syzkaller #0 [ 92.187220][ T9705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 92.197275][ T9705] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 92.202642][ T9705] 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 [ 92.222322][ T9705] RSP: 0018:ffffc90001b77940 EFLAGS: 00010202 [ 92.228367][ T9705] RAX: dffffc0000000000 RBX: ffff8880a6480400 RCX: ffffffff8673a332 [ 92.236324][ T9705] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 92.244273][ T9705] RBP: ffffc90001b77970 R08: ffff888094a3c0c0 R09: ffffed1015d0703d [ 92.252231][ T9705] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 92.260176][ T9705] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 92.268128][ T9705] FS: 0000000001b43880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.277035][ T9705] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.283593][ T9705] CR2: 00000000200008e0 CR3: 00000000a8416000 CR4: 00000000001406f0 [ 92.291693][ T9705] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.299658][ T9705] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.307620][ T9705] Call Trace: [ 92.310913][ T9705] ? xt_rateest_put+0x440/0x440 [ 92.315748][ T9705] xt_rateest_tg_destroy+0x72/0xa0 [ 92.320883][ T9705] ? xt_percpu_counter_free+0x8f/0xd0 [ 92.326242][ T9705] translate_table+0x11f4/0x1d80 [ 92.331199][ T9705] ? arpt_alloc_initial_table+0x690/0x690 [ 92.336899][ T9705] ? lock_downgrade+0x920/0x920 [ 92.341733][ T9705] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 92.347965][ T9705] ? _copy_from_user+0x12c/0x1a0 [ 92.352883][ T9705] do_arpt_set_ctl+0x317/0x650 [ 92.357631][ T9705] ? __do_replace+0xa80/0xa80 [ 92.362285][ T9705] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 92.367895][ T9705] ? ___might_sleep+0x163/0x2c0 [ 92.372739][ T9705] ? wait_for_completion+0x440/0x440 [ 92.378031][ T9705] ? mutex_unlock+0xd/0x10 [ 92.382443][ T9705] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 92.388412][ T9705] nf_setsockopt+0x77/0xd0 [ 92.392860][ T9705] ip_setsockopt+0xdf/0x100 [ 92.397355][ T9705] udp_setsockopt+0x68/0xb0 [ 92.401849][ T9705] sock_common_setsockopt+0x94/0xd0 [ 92.407131][ T9705] __sys_setsockopt+0x261/0x4c0 [ 92.411964][ T9705] ? sock_create_kern+0x50/0x50 [ 92.416817][ T9705] ? down_read_non_owner+0x490/0x490 [ 92.422111][ T9705] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 92.428350][ T9705] ? handle_mm_fault+0x4ab/0xa50 [ 92.433412][ T9705] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 92.438859][ T9705] ? do_syscall_64+0x26/0x790 [ 92.444444][ T9705] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.450603][ T9705] ? do_syscall_64+0x26/0x790 [ 92.455269][ T9705] __x64_sys_setsockopt+0xbe/0x150 [ 92.460408][ T9705] do_syscall_64+0xfa/0x790 [ 92.464981][ T9705] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 92.470849][ T9705] RIP: 0033:0x441699 [ 92.474726][ T9705] 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 [ 92.495276][ T9705] RSP: 002b:00007ffc63c9fb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 92.503668][ T9705] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000441699 [ 92.511617][ T9705] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 92.519568][ T9705] RBP: 00000000006cb018 R08: 0000000000000430 R09: 00000000004002c8 [ 92.527520][ T9705] R10: 00000000200008c0 R11: 0000000000000246 R12: 0000000000402f20 [ 92.536116][ T9705] R13: 0000000000402fb0 R14: 0000000000000000 R15: 0000000000000000 [ 92.544074][ T9705] Modules linked in: [ 92.548035][ T9705] ---[ end trace ac00bffc03c82df7 ]--- [ 92.553545][ T9705] RIP: 0010:xt_rateest_put+0xa1/0x440 [ 92.558898][ T9705] 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 [ 92.578589][ T9705] RSP: 0018:ffffc90001b77940 EFLAGS: 00010202 [ 92.584828][ T9705] RAX: dffffc0000000000 RBX: ffff8880a6480400 RCX: ffffffff8673a332 [ 92.592886][ T9705] RDX: 000000000000026d RSI: ffffffff8673a0b9 RDI: 0000000000001368 [ 92.600976][ T9705] RBP: ffffc90001b77970 R08: ffff888094a3c0c0 R09: ffffed1015d0703d [ 92.608969][ T9705] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 92.616975][ T9705] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8673a470 [ 92.625102][ T9705] FS: 0000000001b43880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 92.634145][ T9705] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.640754][ T9705] CR2: 00000000200008e0 CR3: 00000000a8416000 CR4: 00000000001406f0 [ 92.648793][ T9705] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.656793][ T9705] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.664865][ T9705] Kernel panic - not syncing: Fatal exception [ 92.672302][ T9705] Kernel Offset: disabled [ 92.676639][ T9705] Rebooting in 86400 seconds..