[ 55.031259][ T27] audit: type=1800 audit(1579128036.413:25): pid=8526 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 55.051142][ T27] audit: type=1800 audit(1579128036.413:26): pid=8526 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 55.099156][ T27] audit: type=1800 audit(1579128036.413:27): pid=8526 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 55.785300][ T8592] sshd (8592) used greatest stack depth: 24024 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.227' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 65.988498][ T8682] list_del corruption, ffff888092a15000->prev is LIST_POISON2 (dead000000000122) [ 65.997947][ T8682] ------------[ cut here ]------------ [ 66.003381][ T8682] kernel BUG at lib/list_debug.c:50! [ 66.008811][ T8682] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 66.014863][ T8682] CPU: 0 PID: 8682 Comm: syz-executor939 Not tainted 5.5.0-rc6-syzkaller #0 [ 66.023509][ T8682] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.033543][ T8682] RIP: 0010:__list_del_entry_valid+0xd3/0x100 [ 66.039580][ T8682] Code: 41 5e 41 5f 5d c3 48 c7 c7 83 07 cf 88 4c 89 f6 31 c0 e8 d3 48 c1 fd 0f 0b 48 c7 c7 bb 07 cf 88 4c 89 f6 31 c0 e8 c0 48 c1 fd <0f> 0b 48 c7 c7 f3 07 cf 88 4c 89 f6 31 c0 e8 ad 48 c1 fd 0f 0b 48 [ 66.059152][ T8682] RSP: 0018:ffffc90001cdf738 EFLAGS: 00010246 [ 66.065185][ T8682] RAX: 000000000000004e RBX: ffff88809f370d80 RCX: 67f590d36df98600 [ 66.073126][ T8682] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 66.081068][ T8682] RBP: ffffc90001cdf758 R08: ffffffff815f9d64 R09: ffffed1015d865e0 [ 66.089011][ T8682] R10: ffffed1015d865e0 R11: 0000000000000000 R12: dffffc0000000000 [ 66.096952][ T8682] R13: dffffc0000000000 R14: ffff888092a15000 R15: dead000000000122 [ 66.104894][ T8682] FS: 00000000018db880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 66.113794][ T8682] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.120348][ T8682] CR2: 0000000020003ac0 CR3: 00000000a6e0a000 CR4: 00000000001406f0 [ 66.128295][ T8682] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.136239][ T8682] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.144180][ T8682] Call Trace: [ 66.147445][ T8682] nf_tables_commit+0x12a1/0x41e0 [ 66.152444][ T8682] nfnetlink_rcv+0x1485/0x1e50 [ 66.157195][ T8682] ? rcu_lock_release+0x21/0x30 [ 66.162016][ T8682] ? netlink_deliver_tap+0x142/0x880 [ 66.167274][ T8682] netlink_unicast+0x767/0x920 [ 66.172007][ T8682] netlink_sendmsg+0xa2c/0xd50 [ 66.176744][ T8682] ? netlink_getsockopt+0x9f0/0x9f0 [ 66.181911][ T8682] ____sys_sendmsg+0x4f7/0x7f0 [ 66.186645][ T8682] __sys_sendmsg+0x1ed/0x290 [ 66.191212][ T8682] ? up_read+0x1d/0x20 [ 66.195252][ T8682] ? do_user_addr_fault+0x654/0xaf0 [ 66.200421][ T8682] ? check_preemption_disabled+0xb4/0x260 [ 66.206110][ T8682] ? debug_smp_processor_id+0x9/0x20 [ 66.211457][ T8682] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 66.216904][ T8682] ? trace_irq_disable_rcuidle+0x23/0x1e0 [ 66.222593][ T8682] ? do_syscall_64+0x1d/0x1c0 [ 66.227248][ T8682] __x64_sys_sendmsg+0x7f/0x90 [ 66.232114][ T8682] do_syscall_64+0xf7/0x1c0 [ 66.236613][ T8682] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.242476][ T8682] RIP: 0033:0x441aa9 [ 66.246341][ T8682] Code: e8 fc ab 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 9b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 66.265954][ T8682] RSP: 002b:00007ffd330254b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 66.274342][ T8682] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441aa9 [ 66.282289][ T8682] RDX: 0000000000000042 RSI: 0000000020003ac0 RDI: 0000000000000003 [ 66.290234][ T8682] RBP: 0000000000006f6c R08: 00000000004002c8 R09: 00000000004002c8 [ 66.298179][ T8682] R10: 0000000000000004 R11: 0000000000000246 R12: 00000000004028d0 [ 66.306123][ T8682] R13: 0000000000402960 R14: 0000000000000000 R15: 0000000000000000 [ 66.314070][ T8682] Modules linked in: [ 66.318642][ T8682] ---[ end trace f0bf3cc743e39f5b ]--- [ 66.324097][ T8682] RIP: 0010:__list_del_entry_valid+0xd3/0x100 [ 66.330180][ T8682] Code: 41 5e 41 5f 5d c3 48 c7 c7 83 07 cf 88 4c 89 f6 31 c0 e8 d3 48 c1 fd 0f 0b 48 c7 c7 bb 07 cf 88 4c 89 f6 31 c0 e8 c0 48 c1 fd <0f> 0b 48 c7 c7 f3 07 cf 88 4c 89 f6 31 c0 e8 ad 48 c1 fd 0f 0b 48 [ 66.349863][ T8682] RSP: 0018:ffffc90001cdf738 EFLAGS: 00010246 [ 66.355977][ T8682] RAX: 000000000000004e RBX: ffff88809f370d80 RCX: 67f590d36df98600 [ 66.363936][ T8682] RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 [ 66.371924][ T8682] RBP: ffffc90001cdf758 R08: ffffffff815f9d64 R09: ffffed1015d865e0 [ 66.379901][ T8682] R10: ffffed1015d865e0 R11: 0000000000000000 R12: dffffc0000000000 [ 66.387886][ T8682] R13: dffffc0000000000 R14: ffff888092a15000 R15: dead000000000122 [ 66.395857][ T8682] FS: 00000000018db880(0000) GS:ffff8880aec00000(0000) knlGS:0000000000000000 [ 66.404802][ T8682] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.411368][ T8682] CR2: ffffffffff600400 CR3: 00000000a6e0a000 CR4: 00000000001406f0 [ 66.419381][ T8682] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.427362][ T8682] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.435343][ T8682] Kernel panic - not syncing: Fatal exception [ 66.442500][ T8682] Kernel Offset: disabled [ 66.446813][ T8682] Rebooting in 86400 seconds..