[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.272310][ T26] audit: type=1800 audit(1558057136.473:25): pid=8934 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.300440][ T26] audit: type=1800 audit(1558057136.473:26): pid=8934 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.346921][ T26] audit: type=1800 audit(1558057136.483:27): pid=8934 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 '10.128.0.125' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.140625][ T9087] ------------[ cut here ]------------ [ 70.146120][ T9087] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 70.146189][ T9087] WARNING: CPU: 1 PID: 9087 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 70.162622][ T9087] Kernel panic - not syncing: panic_on_warn set ... [ 70.169196][ T9087] CPU: 1 PID: 9087 Comm: syz-executor471 Not tainted 5.1.0+ #17 [ 70.176920][ T9087] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.187056][ T9087] Call Trace: [ 70.190344][ T9087] dump_stack+0x172/0x1f0 [ 70.194667][ T9087] ? __lock_acquire+0x1730/0x5490 [ 70.199679][ T9087] panic+0x2cb/0x65c [ 70.203568][ T9087] ? __warn_printk+0xf3/0xf3 [ 70.208164][ T9087] ? __lock_acquire+0x17b5/0x5490 [ 70.213202][ T9087] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.219436][ T9087] ? __warn.cold+0x5/0x45 [ 70.223783][ T9087] ? __warn+0xe8/0x1d0 [ 70.227838][ T9087] ? __lock_acquire+0x17b5/0x5490 [ 70.232852][ T9087] __warn.cold+0x20/0x45 [ 70.237090][ T9087] ? vprintk_emit+0x1ce/0x6d0 [ 70.241759][ T9087] ? __lock_acquire+0x17b5/0x5490 [ 70.246773][ T9087] report_bug+0x263/0x2b0 [ 70.251097][ T9087] do_error_trap+0x11b/0x200 [ 70.255694][ T9087] do_invalid_op+0x37/0x50 [ 70.260114][ T9087] ? __lock_acquire+0x17b5/0x5490 [ 70.265478][ T9087] invalid_op+0x14/0x20 [ 70.269617][ T9087] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 70.275246][ T9087] Code: d2 0f 85 c7 2c 00 00 44 8b 3d 07 46 09 08 45 85 ff 0f 85 57 f3 ff ff 48 c7 c6 c0 53 6b 87 48 c7 c7 a0 2a 6b 87 e8 f9 f0 eb ff <0f> 0b e9 40 f3 ff ff 0f 0b e9 83 f1 ff ff 8b 0d e7 52 ee 08 85 c9 [ 70.294840][ T9087] RSP: 0018:ffff8880914a73e0 EFLAGS: 00010086 [ 70.300899][ T9087] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 70.308868][ T9087] RDX: 0000000000000000 RSI: ffffffff815afbe6 RDI: ffffed1012294e6e [ 70.316841][ T9087] RBP: ffff8880914a7588 R08: ffff88808d984600 R09: fffffbfff1133055 [ 70.324824][ T9087] R10: fffffbfff1133054 R11: ffffffff889982a3 R12: 000000005d16096e [ 70.332789][ T9087] R13: 0000000000000000 R14: 000000000004096e R15: 0000000000000000 [ 70.340786][ T9087] ? vprintk_func+0x86/0x189 [ 70.345369][ T9087] ? sock_diag_rcv+0x2b/0x40 [ 70.349946][ T9087] ? netlink_unicast+0x536/0x720 [ 70.354889][ T9087] ? netlink_sendmsg+0x8ae/0xd70 [ 70.359815][ T9087] ? sock_sendmsg+0x12e/0x170 [ 70.364500][ T9087] ? ___sys_sendmsg+0x81d/0x960 [ 70.369350][ T9087] ? __sys_sendmsg+0x105/0x1d0 [ 70.374100][ T9087] ? __x64_sys_sendmsg+0x78/0xb0 [ 70.379027][ T9087] ? do_syscall_64+0x103/0x680 [ 70.383782][ T9087] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.389841][ T9087] ? mark_held_locks+0xf0/0xf0 [ 70.394593][ T9087] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.400211][ T9087] ? find_held_lock+0x35/0x130 [ 70.404968][ T9087] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.410589][ T9087] lock_acquire+0x16f/0x3f0 [ 70.415075][ T9087] ? rhashtable_walk_enter+0xf9/0x390 [ 70.420439][ T9087] _raw_spin_lock+0x2f/0x40 [ 70.424926][ T9087] ? rhashtable_walk_enter+0xf9/0x390 [ 70.430309][ T9087] rhashtable_walk_enter+0xf9/0x390 [ 70.435525][ T9087] __tipc_dump_start+0x1fa/0x3c0 [ 70.440449][ T9087] tipc_dump_start+0x70/0x90 [ 70.445021][ T9087] __netlink_dump_start+0x4fb/0x7e0 [ 70.450199][ T9087] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.455289][ T9087] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 70.461075][ T9087] ? __tipc_diag_gen_cookie+0x90/0x90 [ 70.466431][ T9087] ? sock_diag_rcv+0x1c/0x40 [ 70.471025][ T9087] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.476116][ T9087] ? tipc_unregister_sysctl+0x20/0x20 [ 70.481465][ T9087] ? tipc_ioctl+0x2e0/0x2e0 [ 70.485957][ T9087] sock_diag_rcv_msg+0x322/0x410 [ 70.490880][ T9087] netlink_rcv_skb+0x17a/0x460 [ 70.495629][ T9087] ? sock_diag_bind+0x80/0x80 [ 70.500303][ T9087] ? netlink_ack+0xb50/0xb50 [ 70.504885][ T9087] ? kasan_check_read+0x11/0x20 [ 70.509719][ T9087] ? netlink_deliver_tap+0x254/0xc00 [ 70.514990][ T9087] sock_diag_rcv+0x2b/0x40 [ 70.519439][ T9087] netlink_unicast+0x536/0x720 [ 70.524190][ T9087] ? netlink_attachskb+0x770/0x770 [ 70.529289][ T9087] ? _copy_from_iter_full+0x25d/0x8c0 [ 70.534657][ T9087] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 70.540369][ T9087] ? __check_object_size+0x3d/0x42f [ 70.545560][ T9087] netlink_sendmsg+0x8ae/0xd70 [ 70.550313][ T9087] ? netlink_unicast+0x720/0x720 [ 70.555258][ T9087] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 70.561887][ T9087] ? apparmor_socket_sendmsg+0x2a/0x30 [ 70.567357][ T9087] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.573587][ T9087] ? security_socket_sendmsg+0x93/0xc0 [ 70.579029][ T9087] ? netlink_unicast+0x720/0x720 [ 70.583950][ T9087] sock_sendmsg+0x12e/0x170 [ 70.588439][ T9087] ___sys_sendmsg+0x81d/0x960 [ 70.593134][ T9087] ? copy_msghdr_from_user+0x430/0x430 [ 70.598582][ T9087] ? prep_transhuge_page+0xa0/0xa0 [ 70.603699][ T9087] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.609925][ T9087] ? __handle_mm_fault+0x7cd/0x3ec0 [ 70.615105][ T9087] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.621328][ T9087] ? __fget_light+0x1a9/0x230 [ 70.625986][ T9087] ? __fdget+0x1b/0x20 [ 70.630040][ T9087] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.636274][ T9087] __sys_sendmsg+0x105/0x1d0 [ 70.640875][ T9087] ? __ia32_sys_shutdown+0x80/0x80 [ 70.645972][ T9087] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 70.651537][ T9087] ? do_syscall_64+0x26/0x680 [ 70.656196][ T9087] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.662359][ T9087] ? do_syscall_64+0x26/0x680 [ 70.667018][ T9087] __x64_sys_sendmsg+0x78/0xb0 [ 70.671766][ T9087] do_syscall_64+0x103/0x680 [ 70.676339][ T9087] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.682217][ T9087] RIP: 0033:0x4401f9 [ 70.686090][ T9087] 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 [ 70.705685][ T9087] RSP: 002b:00007ffddf544ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 70.714095][ T9087] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 [ 70.722080][ T9087] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 70.730042][ T9087] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 70.738001][ T9087] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80 [ 70.745957][ T9087] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 70.755015][ T9087] Kernel Offset: disabled [ 70.759344][ T9087] Rebooting in 86400 seconds..