[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.647308][ T24] audit: type=1800 audit(1558386623.662:25): pid=8327 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.684191][ T24] audit: type=1800 audit(1558386623.662:26): pid=8327 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.731743][ T24] audit: type=1800 audit(1558386623.662:27): pid=8327 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 '10.128.0.86' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.250827][ T8480] ------------[ cut here ]------------ [ 69.256438][ T8480] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 69.256509][ T8480] WARNING: CPU: 1 PID: 8480 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 69.273553][ T8480] Kernel panic - not syncing: panic_on_warn set ... [ 69.280123][ T8480] CPU: 1 PID: 8480 Comm: syz-executor471 Not tainted 5.2.0-rc1+ #1 [ 69.287994][ T8480] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.299009][ T8480] Call Trace: [ 69.302288][ T8480] dump_stack+0x172/0x1f0 [ 69.306700][ T8480] ? __lock_acquire+0x16d0/0x5490 [ 69.311705][ T8480] panic+0x2cb/0x744 [ 69.315686][ T8480] ? __warn_printk+0xf3/0xf3 [ 69.320258][ T8480] ? __lock_acquire+0x17b5/0x5490 [ 69.325476][ T8480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.331804][ T8480] ? __warn.cold+0x5/0x4d [ 69.336111][ T8480] ? __warn+0xe8/0x1d0 [ 69.340164][ T8480] ? __lock_acquire+0x17b5/0x5490 [ 69.345315][ T8480] __warn.cold+0x20/0x4d [ 69.349539][ T8480] ? vprintk_emit+0x1ea/0x700 [ 69.354196][ T8480] ? __lock_acquire+0x17b5/0x5490 [ 69.359298][ T8480] report_bug+0x263/0x2b0 [ 69.363732][ T8480] do_error_trap+0x11b/0x200 [ 69.368415][ T8480] do_invalid_op+0x37/0x50 [ 69.372808][ T8480] ? __lock_acquire+0x17b5/0x5490 [ 69.377808][ T8480] invalid_op+0x14/0x20 [ 69.382193][ T8480] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 69.388140][ T8480] Code: d2 0f 85 c7 2c 00 00 44 8b 3d a7 a0 29 08 45 85 ff 0f 85 57 f3 ff ff 48 c7 c6 20 c1 6b 87 48 c7 c7 00 98 6b 87 e8 09 d5 eb ff <0f> 0b e9 40 f3 ff ff 0f 0b e9 83 f1 ff ff 8b 0d 47 88 0e 09 85 c9 [ 69.407830][ T8480] RSP: 0018:ffff88809418f3e0 EFLAGS: 00010086 [ 69.413923][ T8480] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 69.422030][ T8480] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1012831e6e [ 69.430002][ T8480] RBP: ffff88809418f588 R08: ffff88808a21e040 R09: fffffbfff11730e9 [ 69.438064][ T8480] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 000000001afa5617 [ 69.446086][ T8480] R13: 0000000000000000 R14: 0000000000041617 R15: 0000000000000000 [ 69.454177][ T8480] ? vprintk_func+0x86/0x189 [ 69.458757][ T8480] ? sock_diag_rcv+0x2b/0x40 [ 69.463328][ T8480] ? netlink_unicast+0x531/0x710 [ 69.468335][ T8480] ? netlink_sendmsg+0x8ae/0xd70 [ 69.473257][ T8480] ? sock_sendmsg+0xd7/0x130 [ 69.477832][ T8480] ? ___sys_sendmsg+0x803/0x920 [ 69.482667][ T8480] ? __sys_sendmsg+0x105/0x1d0 [ 69.487565][ T8480] ? __x64_sys_sendmsg+0x78/0xb0 [ 69.492488][ T8480] ? do_syscall_64+0xfd/0x680 [ 69.497150][ T8480] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.503513][ T8480] ? mark_held_locks+0xf0/0xf0 [ 69.508312][ T8480] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 69.513979][ T8480] ? find_held_lock+0x35/0x130 [ 69.518743][ T8480] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 69.524475][ T8480] lock_acquire+0x16f/0x3f0 [ 69.528958][ T8480] ? rhashtable_walk_enter+0xf9/0x390 [ 69.534326][ T8480] _raw_spin_lock+0x2f/0x40 [ 69.538810][ T8480] ? rhashtable_walk_enter+0xf9/0x390 [ 69.544366][ T8480] rhashtable_walk_enter+0xf9/0x390 [ 69.549600][ T8480] __tipc_dump_start+0x1fa/0x3c0 [ 69.554528][ T8480] tipc_dump_start+0x70/0x90 [ 69.559105][ T8480] __netlink_dump_start+0x4f8/0x7d0 [ 69.564284][ T8480] ? __tipc_dump_start+0x3c0/0x3c0 [ 69.569374][ T8480] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 69.575262][ T8480] ? __tipc_diag_gen_cookie+0x90/0x90 [ 69.580624][ T8480] ? sock_diag_rcv+0x1c/0x40 [ 69.585209][ T8480] ? __tipc_dump_start+0x3c0/0x3c0 [ 69.590318][ T8480] ? tipc_unregister_sysctl+0x20/0x20 [ 69.595674][ T8480] ? tipc_ioctl+0x2e0/0x2e0 [ 69.600178][ T8480] sock_diag_rcv_msg+0x319/0x410 [ 69.605168][ T8480] netlink_rcv_skb+0x177/0x450 [ 69.610092][ T8480] ? sock_diag_bind+0x80/0x80 [ 69.614924][ T8480] ? netlink_ack+0xb50/0xb50 [ 69.623132][ T8480] ? kasan_check_read+0x11/0x20 [ 69.633225][ T8480] ? netlink_deliver_tap+0x254/0xbf0 [ 69.638498][ T8480] sock_diag_rcv+0x2b/0x40 [ 69.642894][ T8480] netlink_unicast+0x531/0x710 [ 69.647796][ T8480] ? netlink_attachskb+0x770/0x770 [ 69.652891][ T8480] ? _copy_from_iter_full+0x25d/0x8c0 [ 69.658253][ T8480] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 69.663971][ T8480] ? __check_object_size+0x3d/0x42f [ 69.669326][ T8480] netlink_sendmsg+0x8ae/0xd70 [ 69.674298][ T8480] ? netlink_unicast+0x710/0x710 [ 69.679220][ T8480] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 69.684867][ T8480] ? apparmor_socket_sendmsg+0x2a/0x30 [ 69.690324][ T8480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.696628][ T8480] ? security_socket_sendmsg+0x8d/0xc0 [ 69.702285][ T8480] ? netlink_unicast+0x710/0x710 [ 69.707213][ T8480] sock_sendmsg+0xd7/0x130 [ 69.711629][ T8480] ___sys_sendmsg+0x803/0x920 [ 69.716409][ T8480] ? copy_msghdr_from_user+0x430/0x430 [ 69.721960][ T8480] ? prep_transhuge_page+0xa0/0xa0 [ 69.727053][ T8480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.733288][ T8480] ? __handle_mm_fault+0x7cb/0x3eb0 [ 69.738476][ T8480] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.744706][ T8480] ? __fget_light+0x1a9/0x230 [ 69.749402][ T8480] ? __fdget+0x1b/0x20 [ 69.753589][ T8480] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 69.759827][ T8480] __sys_sendmsg+0x105/0x1d0 [ 69.764405][ T8480] ? __ia32_sys_shutdown+0x80/0x80 [ 69.769504][ T8480] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.774940][ T8480] ? do_syscall_64+0x26/0x680 [ 69.779595][ T8480] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.785654][ T8480] ? do_syscall_64+0x26/0x680 [ 69.790314][ T8480] __x64_sys_sendmsg+0x78/0xb0 [ 69.795166][ T8480] do_syscall_64+0xfd/0x680 [ 69.799657][ T8480] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.805537][ T8480] RIP: 0033:0x440209 [ 69.809575][ T8480] 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 [ 69.829305][ T8480] RSP: 002b:00007ffd64f94848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 69.837705][ T8480] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 69.845668][ T8480] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 69.853725][ T8480] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 69.861783][ T8480] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a90 [ 69.869741][ T8480] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 69.879109][ T8480] Kernel Offset: disabled [ 69.883618][ T8480] Rebooting in 86400 seconds..