[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.771196][ T24] audit: type=1800 audit(1558471794.339:25): pid=8428 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.805397][ T24] audit: type=1800 audit(1558471794.339:26): pid=8428 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 57.845117][ T24] audit: type=1800 audit(1558471794.349:27): pid=8428 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 '10.128.10.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.434190][ T8581] BUG: spinlock bad magic on CPU#1, syz-executor152/8581 [ 80.441712][ T8581] kasan: CONFIG_KASAN_INLINE enabled [ 80.447142][ T8581] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 80.455624][ T8581] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 80.462991][ T8581] CPU: 1 PID: 8581 Comm: syz-executor152 Not tainted 5.2.0-rc1+ #21 [ 80.471326][ T8581] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.481620][ T8581] RIP: 0010:spin_dump.cold+0xa2/0xe6 [ 80.487159][ T8581] Code: 4e 4d 02 00 e8 c5 52 bd 05 58 5b 41 5c 41 5d 41 5e 5d c3 48 8d bb d0 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 24 44 8b ab d0 04 00 00 48 81 c3 [ 80.507869][ T8581] RSP: 0018:ffff888099d37538 EFLAGS: 00010207 [ 80.513948][ T8581] RAX: dffffc0000000000 RBX: 00000000376406ed RCX: 0000000000000000 [ 80.522714][ T8581] RDX: 0000000006ec8177 RSI: ffffffff815ac7e6 RDI: 0000000037640bbd [ 80.530911][ T8581] RBP: ffff888099d37560 R08: 0000000000000036 R09: ffffed1015d26011 [ 80.539232][ T8581] R10: ffffed1015d26010 R11: ffff8880ae930087 R12: ffff8882164b9ba8 [ 80.547492][ T8581] R13: ffff88808da10240 R14: ffff8882164b8980 R15: ffff888099d375d8 [ 80.555540][ T8581] FS: 00005555555de880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 80.564660][ T8581] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 80.571402][ T8581] CR2: 0000000020000040 CR3: 000000009ba8c000 CR4: 00000000001406e0 [ 80.579686][ T8581] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 80.587661][ T8581] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 80.595937][ T8581] Call Trace: [ 80.599423][ T8581] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.605672][ T8581] do_raw_spin_lock+0x231/0x2e0 [ 80.610629][ T8581] ? rwlock_bug.part.0+0x90/0x90 [ 80.615655][ T8581] ? lock_acquire+0x16f/0x3f0 [ 80.620342][ T8581] ? rhashtable_walk_enter+0xf9/0x390 [ 80.625726][ T8581] _raw_spin_lock+0x37/0x40 [ 80.630254][ T8581] ? rhashtable_walk_enter+0xf9/0x390 [ 80.635866][ T8581] rhashtable_walk_enter+0xf9/0x390 [ 80.641089][ T8581] __tipc_dump_start+0x1fa/0x3c0 [ 80.646328][ T8581] tipc_dump_start+0x70/0x90 [ 80.650916][ T8581] __netlink_dump_start+0x4f8/0x7d0 [ 80.656126][ T8581] ? __tipc_dump_start+0x3c0/0x3c0 [ 80.661619][ T8581] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 80.667621][ T8581] ? __tipc_diag_gen_cookie+0x90/0x90 [ 80.673266][ T8581] ? sock_diag_rcv+0x1c/0x40 [ 80.677870][ T8581] ? __tipc_dump_start+0x3c0/0x3c0 [ 80.683135][ T8581] ? tipc_unregister_sysctl+0x20/0x20 [ 80.688593][ T8581] ? tipc_ioctl+0x2e0/0x2e0 [ 80.693114][ T8581] sock_diag_rcv_msg+0x319/0x410 [ 80.698402][ T8581] netlink_rcv_skb+0x177/0x450 [ 80.703264][ T8581] ? sock_diag_bind+0x80/0x80 [ 80.707963][ T8581] ? netlink_ack+0xb50/0xb50 [ 80.712634][ T8581] ? kasan_check_read+0x11/0x20 [ 80.717810][ T8581] ? netlink_deliver_tap+0x254/0xbf0 [ 80.723172][ T8581] sock_diag_rcv+0x2b/0x40 [ 80.727652][ T8581] netlink_unicast+0x531/0x710 [ 80.732431][ T8581] ? netlink_attachskb+0x770/0x770 [ 80.737545][ T8581] ? _copy_from_iter_full+0x25d/0x8c0 [ 80.742930][ T8581] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 80.748870][ T8581] ? __check_object_size+0x3d/0x42f [ 80.754195][ T8581] netlink_sendmsg+0x8ae/0xd70 [ 80.758945][ T8581] ? netlink_unicast+0x710/0x710 [ 80.764356][ T8581] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 80.770379][ T8581] ? apparmor_socket_sendmsg+0x2a/0x30 [ 80.775949][ T8581] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.782540][ T8581] ? security_socket_sendmsg+0x8d/0xc0 [ 80.788260][ T8581] ? netlink_unicast+0x710/0x710 [ 80.793211][ T8581] sock_sendmsg+0xd7/0x130 [ 80.797796][ T8581] ___sys_sendmsg+0x803/0x920 [ 80.802525][ T8581] ? copy_msghdr_from_user+0x430/0x430 [ 80.808175][ T8581] ? prep_transhuge_page+0xa0/0xa0 [ 80.813393][ T8581] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.819723][ T8581] ? __handle_mm_fault+0x7cb/0x3eb0 [ 80.825121][ T8581] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 80.831523][ T8581] ? __fget_light+0x1a9/0x230 [ 80.836216][ T8581] ? __fdget+0x1b/0x20 [ 80.840270][ T8581] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 80.846616][ T8581] __sys_sendmsg+0x105/0x1d0 [ 80.851473][ T8581] ? __ia32_sys_shutdown+0x80/0x80 [ 80.856606][ T8581] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 80.862141][ T8581] ? do_syscall_64+0x26/0x680 [ 80.866830][ T8581] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.873449][ T8581] ? do_syscall_64+0x26/0x680 [ 80.878294][ T8581] __x64_sys_sendmsg+0x78/0xb0 [ 80.883083][ T8581] do_syscall_64+0xfd/0x680 [ 80.887689][ T8581] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 80.893718][ T8581] RIP: 0033:0x440209 [ 80.897622][ T8581] 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 [ 80.917567][ T8581] RSP: 002b:00007ffd56d95848 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 80.926257][ T8581] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 80.934294][ T8581] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 80.942785][ T8581] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 80.950972][ T8581] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a90 [ 80.959299][ T8581] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 80.967486][ T8581] Modules linked in: [ 80.971550][ T8581] ---[ end trace 2f3f988c86308afa ]--- [ 80.977086][ T8581] RIP: 0010:spin_dump.cold+0xa2/0xe6 [ 80.982818][ T8581] Code: 4e 4d 02 00 e8 c5 52 bd 05 58 5b 41 5c 41 5d 41 5e 5d c3 48 8d bb d0 04 00 00 b8 ff ff 37 00 48 89 fa 48 c1 e0 2a 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 24 44 8b ab d0 04 00 00 48 81 c3 [ 81.002866][ T8581] RSP: 0018:ffff888099d37538 EFLAGS: 00010207 [ 81.009083][ T8581] RAX: dffffc0000000000 RBX: 00000000376406ed RCX: 0000000000000000 [ 81.017156][ T8581] RDX: 0000000006ec8177 RSI: ffffffff815ac7e6 RDI: 0000000037640bbd [ 81.025448][ T8581] RBP: ffff888099d37560 R08: 0000000000000036 R09: ffffed1015d26011 [ 81.033666][ T8581] R10: ffffed1015d26010 R11: ffff8880ae930087 R12: ffff8882164b9ba8 [ 81.041662][ T8581] R13: ffff88808da10240 R14: ffff8882164b8980 R15: ffff888099d375d8 [ 81.050136][ T8581] FS: 00005555555de880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 81.059340][ T8581] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.066035][ T8581] CR2: 0000000020000040 CR3: 000000009ba8c000 CR4: 00000000001406e0 [ 81.074472][ T8581] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.082699][ T8581] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.091052][ T8581] Kernel panic - not syncing: Fatal exception [ 81.098954][ T8581] Kernel Offset: disabled [ 81.103402][ T8581] Rebooting in 86400 seconds..