[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 77.558002][ T26] audit: type=1800 audit(1578258248.863:25): pid=9378 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 77.577735][ T26] audit: type=1800 audit(1578258248.863:26): pid=9378 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 77.604475][ T26] audit: type=1800 audit(1578258248.873:27): pid=9378 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 '10.128.0.109' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 88.256380][ T9529] kasan: CONFIG_KASAN_INLINE enabled [ 88.263148][ T9529] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 88.271300][ T9529] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 88.278364][ T9529] CPU: 0 PID: 9529 Comm: syz-executor395 Not tainted 5.5.0-rc4-syzkaller #0 [ 88.287026][ T9529] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 88.297088][ T9529] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 88.303394][ T9529] Code: 49 54 01 fb 45 84 f6 0f 84 08 07 00 00 e8 fb 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 ed 8b ed fa [ 88.323936][ T9529] RSP: 0018:ffffc90002027788 EFLAGS: 00010202 [ 88.329987][ T9529] RAX: dffffc0000000000 RBX: ffffc90002027ae8 RCX: ffffffff8673e15e [ 88.337958][ T9529] RDX: 000000000000026d RSI: ffffffff8673da45 RDI: 0000000000001368 [ 88.345974][ T9529] RBP: ffffc90002027848 R08: ffff888093f62040 R09: ffffed1015d0703d [ 88.353984][ T9529] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 88.362085][ T9529] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90002027820 [ 88.370057][ T9529] FS: 0000000001032880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 88.379872][ T9529] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.386541][ T9529] CR2: 0000000020000920 CR3: 00000000a2d57000 CR4: 00000000001406f0 [ 88.394566][ T9529] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.402557][ T9529] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.410515][ T9529] Call Trace: [ 88.413819][ T9529] ? xt_rateest_lookup+0x270/0x270 [ 88.418912][ T9529] ? __kasan_check_write+0x14/0x20 [ 88.424036][ T9529] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 88.429585][ T9529] ? xt_rateest_lookup+0x270/0x270 [ 88.436156][ T9529] xt_check_target+0x283/0x690 [ 88.440913][ T9529] ? textify_hooks.constprop.0+0x1a0/0x1a0 [ 88.446705][ T9529] ? mutex_unlock+0xd/0x10 [ 88.451107][ T9529] ? xt_find_target+0x73/0x280 [ 88.456213][ T9529] ? xt_find_target+0x73/0x280 [ 88.460960][ T9529] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 88.467190][ T9529] translate_table+0x1005/0x1d70 [ 88.472137][ T9529] ? arpt_alloc_initial_table+0x690/0x690 [ 88.477992][ T9529] ? lock_downgrade+0x920/0x920 [ 88.482836][ T9529] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 88.489247][ T9529] ? _copy_from_user+0x12c/0x1a0 [ 88.494173][ T9529] do_arpt_set_ctl+0x310/0x640 [ 88.498939][ T9529] ? __do_replace+0xa80/0xa80 [ 88.503860][ T9529] ? __mutex_unlock_slowpath+0xf0/0x6a0 [ 88.509393][ T9529] ? ___might_sleep+0x163/0x2c0 [ 88.514224][ T9529] ? wait_for_completion+0x440/0x440 [ 88.519506][ T9529] ? mutex_unlock+0xd/0x10 [ 88.523906][ T9529] ? nf_sockopt_find.constprop.0+0x226/0x290 [ 88.529885][ T9529] nf_setsockopt+0x77/0xd0 [ 88.534287][ T9529] ip_setsockopt+0xdf/0x100 [ 88.538778][ T9529] udp_setsockopt+0x68/0xb0 [ 88.543277][ T9529] sock_common_setsockopt+0x94/0xd0 [ 88.548461][ T9529] __sys_setsockopt+0x261/0x4c0 [ 88.553329][ T9529] ? sock_create_kern+0x50/0x50 [ 88.558293][ T9529] ? down_read_non_owner+0x490/0x490 [ 88.563593][ T9529] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 88.570302][ T9529] ? handle_mm_fault+0x4ab/0xa50 [ 88.575273][ T9529] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 88.580719][ T9529] ? do_syscall_64+0x26/0x790 [ 88.585740][ T9529] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.591898][ T9529] ? do_syscall_64+0x26/0x790 [ 88.596558][ T9529] __x64_sys_setsockopt+0xbe/0x150 [ 88.601845][ T9529] do_syscall_64+0xfa/0x790 [ 88.606523][ T9529] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 88.612445][ T9529] RIP: 0033:0x4412e9 [ 88.616328][ T9529] 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 [ 88.635937][ T9529] RSP: 002b:00007ffce515b748 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 88.644355][ T9529] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004412e9 [ 88.652389][ T9529] RDX: 0000000000000060 RSI: 0a02000000000000 RDI: 0000000000000003 [ 88.660360][ T9529] RBP: 00000000006cb018 R08: 0000000000000408 R09: 00000000004002c8 [ 88.668353][ T9529] R10: 0000000020000900 R11: 0000000000000246 R12: 0000000000402b70 [ 88.676337][ T9529] R13: 0000000000402c00 R14: 0000000000000000 R15: 0000000000000000 [ 88.684324][ T9529] Modules linked in: [ 88.689108][ T9529] ---[ end trace fc287bef3fd142b3 ]--- [ 88.694622][ T9529] RIP: 0010:xt_rateest_tg_checkentry+0x11d/0xb40 [ 88.701102][ T9529] Code: 49 54 01 fb 45 84 f6 0f 84 08 07 00 00 e8 fb 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 ed 8b ed fa [ 88.720805][ T9529] RSP: 0018:ffffc90002027788 EFLAGS: 00010202 [ 88.726918][ T9529] RAX: dffffc0000000000 RBX: ffffc90002027ae8 RCX: ffffffff8673e15e [ 88.735212][ T9529] RDX: 000000000000026d RSI: ffffffff8673da45 RDI: 0000000000001368 [ 88.743185][ T9529] RBP: ffffc90002027848 R08: ffff888093f62040 R09: ffffed1015d0703d [ 88.751177][ T9529] R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: 000000000000002d [ 88.759186][ T9529] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90002027820 [ 88.767177][ T9529] FS: 0000000001032880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 88.776493][ T9529] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 88.783159][ T9529] CR2: ffffffffff600400 CR3: 00000000a2d57000 CR4: 00000000001406f0 [ 88.791165][ T9529] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 88.799169][ T9529] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 88.807174][ T9529] Kernel panic - not syncing: Fatal exception [ 88.814744][ T9529] Kernel Offset: disabled [ 88.819167][ T9529] Rebooting in 86400 seconds..