[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 68.541484][ T27] audit: type=1800 audit(1578295476.458:25): pid=9489 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 68.561336][ T27] audit: type=1800 audit(1578295476.468:26): pid=9489 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 68.599276][ T27] audit: type=1800 audit(1578295476.468:27): pid=9489 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 '10.128.0.121' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.240608][ T9641] kasan: CONFIG_KASAN_INLINE enabled [ 80.246161][ T9641] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 80.254284][ T9641] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 80.261218][ T9641] CPU: 1 PID: 9641 Comm: syz-executor116 Not tainted 5.5.0-rc5-syzkaller #0 [ 80.270022][ T9641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.280111][ T9641] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 80.286422][ T9641] Code: 29 54 01 fb 45 84 f6 0f 84 08 07 00 00 e8 db 52 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 8b ed fa [ 80.306017][ T9641] RSP: 0018:ffffc90001dd7788 EFLAGS: 00010202 [ 80.312097][ T9641] RAX: dffffc0000000000 RBX: ffffc90001dd7ae8 RCX: ffffffff8673e16e [ 80.320169][ T9641] RDX: 000000000000026d RSI: ffffffff8673da55 RDI: 0000000000001368 [ 80.328131][ T9641] RBP: ffffc90001dd7848 R08: ffff888095520000 R09: ffffed1015d2703d [ 80.336093][ T9641] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 80.344054][ T9641] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001dd7820 [ 80.352053][ T9641] FS: 00000000019c0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 80.361104][ T9641] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.367671][ T9641] CR2: 0000000020000920 CR3: 000000009feb6000 CR4: 00000000001406e0 [ 80.375625][ T9641] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.383588][ T9641] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.391543][ T9641] Call Trace: [ 80.394829][ T9641] ? xt_rateest_lookup+0x270/0x270 [ 80.399925][ T9641] ? __kasan_check_write+0x14/0x20 [ 80.405019][ T9641] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 80.410638][ T9641] ? xt_rateest_lookup+0x270/0x270 [ 80.415726][ T9641] xt_check_target+0x283/0x690 [ 80.420477][ T9641] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 80.426279][ T9641] ? mutex_unlock+0xd/0x10 [ 80.430670][ T9641] ? xt_find_target+0x73/0x280 [ 80.435410][ T9641] ? xt_find_target+0x73/0x280 [ 80.440155][ T9641] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 80.446376][ T9641] translate_table+0x1005/0x1d70 [ 80.451298][ T9641] ? arpt_alloc_initial_table+0x690/0x690 [ 80.456998][ T9641] ? lock_downgrade+0x920/0x920 [ 80.461830][ T9641] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 80.468046][ T9641] ? _copy_from_user+0x12c/0x1a0 [ 80.472967][ T9641] do_arpt_set_ctl+0x310/0x640 [ 80.477721][ T9641] ? __do_replace+0xa80/0xa80 [ 80.482391][ T9641] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 80.487913][ T9641] ? ___might_sleep+0x163/0x2c0 [ 80.492764][ T9641] ? wait_for_completion+0x440/0x440 [ 80.498026][ T9641] ? mutex_unlock+0xd/0x10 [ 80.502431][ T9641] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 80.508397][ T9641] nf_setsockopt+0x77/0xd0 [ 80.512802][ T9641] ip_setsockopt+0xdf/0x100 [ 80.517282][ T9641] udp_setsockopt+0x68/0xb0 [ 80.521824][ T9641] sock_common_setsockopt+0x94/0xd0 [ 80.527009][ T9641] __sys_setsockopt+0x261/0x4c0 [ 80.531838][ T9641] ? sock_create_kern+0x50/0x50 [ 80.536722][ T9641] ? down_read_non_owner+0x490/0x490 [ 80.541991][ T9641] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 80.548209][ T9641] ? handle_mm_fault+0x4ab/0xa50 [ 80.553128][ T9641] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 80.558565][ T9641] ? do_syscall_64+0x26/0x790 [ 80.563219][ T9641] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.569258][ T9641] ? do_syscall_64+0x26/0x790 [ 80.573912][ T9641] __x64_sys_setsockopt+0xbe/0x150 [ 80.579007][ T9641] do_syscall_64+0xfa/0x790 [ 80.583494][ T9641] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.589362][ T9641] RIP: 0033:0x4412e9 [ 80.593236][ T9641] 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 [ 80.612828][ T9641] RSP: 002b:00007fffc60692f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 80.621213][ T9641] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004412e9 [ 80.629181][ T9641] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 80.637131][ T9641] RBP: 00000000006cb018 R08: 0000000000000408 R09: 00000000004002c8 [ 80.645079][ T9641] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000402b70 [ 80.653040][ T9641] R13: 0000000000402c00 R14: 0000000000000000 R15: 0000000000000000 [ 80.660990][ T9641] Modules linked in: [ 80.665329][ T9641] ---[ end trace 80934a91af76ddeb ]--- [ 80.670797][ T9641] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 80.677139][ T9641] Code: 29 54 01 fb 45 84 f6 0f 84 08 07 00 00 e8 db 52 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 f4 08 00 00 4d 8b ad 68 13 00 00 e8 cd 8b ed fa [ 80.696765][ T9641] RSP: 0018:ffffc90001dd7788 EFLAGS: 00010202 [ 80.702837][ T9641] RAX: dffffc0000000000 RBX: ffffc90001dd7ae8 RCX: ffffffff8673e16e [ 80.710821][ T9641] RDX: 000000000000026d RSI: ffffffff8673da55 RDI: 0000000000001368 [ 80.718815][ T9641] RBP: ffffc90001dd7848 R08: ffff888095520000 R09: ffffed1015d2703d [ 80.726814][ T9641] R10: ffffed1015d2703c R11: ffff8880ae9381e3 R12: 000000000000002d [ 80.734815][ T9641] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001dd7820 [ 80.742801][ T9641] FS: 00000000019c0880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 80.751709][ T9641] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.758308][ T9641] CR2: 0000000020000920 CR3: 000000009feb6000 CR4: 00000000001406e0 [ 80.766307][ T9641] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.774309][ T9641] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.782289][ T9641] Kernel panic - not syncing: Fatal exception [ 80.790049][ T9641] Kernel Offset: disabled [ 80.794373][ T9641] Rebooting in 86400 seconds..