[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.801521][ T27] audit: type=1800 audit(1558390876.021:25): pid=8939 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.823643][ T27] audit: type=1800 audit(1558390876.031:26): pid=8939 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.862698][ T27] audit: type=1800 audit(1558390876.031:27): pid=8939 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 '10.128.1.9' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 90.303714][ T9094] ------------[ cut here ]------------ [ 90.309701][ T9094] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 90.309830][ T9094] WARNING: CPU: 0 PID: 9094 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 90.326829][ T9094] Kernel panic - not syncing: panic_on_warn set ... [ 90.333492][ T9094] CPU: 0 PID: 9094 Comm: syz-executor351 Not tainted 5.1.0+ #1 [ 90.341405][ T9094] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.351755][ T9094] Call Trace: [ 90.355057][ T9094] dump_stack+0x172/0x1f0 [ 90.359677][ T9094] ? __lock_acquire+0x1790/0x5490 [ 90.364716][ T9094] panic+0x2cb/0x646 [ 90.368621][ T9094] ? __warn_printk+0xf3/0xf3 [ 90.373209][ T9094] ? __lock_acquire+0x17b5/0x5490 [ 90.378324][ T9094] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.385643][ T9094] ? __warn.cold+0x5/0x4b [ 90.390242][ T9094] ? __warn+0xe8/0x1d0 [ 90.394451][ T9094] ? __lock_acquire+0x17b5/0x5490 [ 90.409214][ T9094] __warn.cold+0x20/0x4b [ 90.413572][ T9094] ? vprintk_emit+0x1ce/0x6d0 [ 90.418366][ T9094] ? __lock_acquire+0x17b5/0x5490 [ 90.423496][ T9094] report_bug+0x263/0x2b0 [ 90.427998][ T9094] do_error_trap+0x11b/0x200 [ 90.432836][ T9094] do_invalid_op+0x37/0x50 [ 90.437237][ T9094] ? __lock_acquire+0x17b5/0x5490 [ 90.442681][ T9094] invalid_op+0x14/0x20 [ 90.446953][ T9094] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 90.452624][ T9094] Code: d2 0f 85 c7 2c 00 00 44 8b 3d a7 8d 29 08 45 85 ff 0f 85 57 f3 ff ff 48 c7 c6 60 bf 6b 87 48 c7 c7 40 96 6b 87 e8 89 f8 eb ff <0f> 0b e9 40 f3 ff ff 0f 0b e9 83 f1 ff ff 8b 0d 47 6c 0e 09 85 c9 [ 90.473093][ T9094] RSP: 0018:ffff88808b12f3e0 EFLAGS: 00010086 [ 90.479808][ T9094] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 90.488253][ T9094] RDX: 0000000000000000 RSI: ffffffff815ab116 RDI: ffffed1011625e6e [ 90.497271][ T9094] RBP: ffff88808b12f588 R08: ffff88809b088500 R09: fffffbfff1173025 [ 90.505574][ T9094] R10: fffffbfff1173024 R11: ffffffff88b98123 R12: 000000008ba1aca0 [ 90.514372][ T9094] R13: 0000000000000000 R14: 0000000000040ca0 R15: 0000000000000000 [ 90.522743][ T9094] ? vprintk_func+0x86/0x189 [ 90.527698][ T9094] ? sock_diag_rcv+0x2b/0x40 [ 90.532444][ T9094] ? netlink_unicast+0x531/0x710 [ 90.537801][ T9094] ? netlink_sendmsg+0x8ae/0xd70 [ 90.542844][ T9094] ? sock_sendmsg+0xd7/0x130 [ 90.547611][ T9094] ? ___sys_sendmsg+0x803/0x920 [ 90.552462][ T9094] ? __sys_sendmsg+0x105/0x1d0 [ 90.557450][ T9094] ? __x64_sys_sendmsg+0x78/0xb0 [ 90.562474][ T9094] ? do_syscall_64+0xfd/0x680 [ 90.567143][ T9094] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 90.573520][ T9094] ? mark_held_locks+0xf0/0xf0 [ 90.578856][ T9094] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 90.584598][ T9094] ? find_held_lock+0x35/0x130 [ 90.589519][ T9094] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 90.595274][ T9094] lock_acquire+0x16f/0x3f0 [ 90.599811][ T9094] ? rhashtable_walk_enter+0xf9/0x390 [ 90.605198][ T9094] _raw_spin_lock+0x2f/0x40 [ 90.609956][ T9094] ? rhashtable_walk_enter+0xf9/0x390 [ 90.615508][ T9094] rhashtable_walk_enter+0xf9/0x390 [ 90.620953][ T9094] __tipc_dump_start+0x1fa/0x3c0 [ 90.626121][ T9094] tipc_dump_start+0x70/0x90 [ 90.630713][ T9094] __netlink_dump_start+0x4f8/0x7d0 [ 90.635904][ T9094] ? __tipc_dump_start+0x3c0/0x3c0 [ 90.641087][ T9094] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 90.646989][ T9094] ? __tipc_diag_gen_cookie+0x90/0x90 [ 90.652593][ T9094] ? sock_diag_rcv+0x1c/0x40 [ 90.657265][ T9094] ? __tipc_dump_start+0x3c0/0x3c0 [ 90.662456][ T9094] ? tipc_unregister_sysctl+0x20/0x20 [ 90.668007][ T9094] ? tipc_ioctl+0x2e0/0x2e0 [ 90.672659][ T9094] sock_diag_rcv_msg+0x319/0x410 [ 90.677589][ T9094] netlink_rcv_skb+0x177/0x450 [ 90.682382][ T9094] ? sock_diag_bind+0x80/0x80 [ 90.687054][ T9094] ? netlink_ack+0xb50/0xb50 [ 90.691907][ T9094] ? kasan_check_read+0x11/0x20 [ 90.696911][ T9094] ? netlink_deliver_tap+0x254/0xbf0 [ 90.702304][ T9094] sock_diag_rcv+0x2b/0x40 [ 90.706966][ T9094] netlink_unicast+0x531/0x710 [ 90.712067][ T9094] ? netlink_attachskb+0x770/0x770 [ 90.717292][ T9094] ? _copy_from_iter_full+0x25d/0x8c0 [ 90.722827][ T9094] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 90.728930][ T9094] ? __check_object_size+0x3d/0x42f [ 90.734240][ T9094] netlink_sendmsg+0x8ae/0xd70 [ 90.738998][ T9094] ? netlink_unicast+0x710/0x710 [ 90.744067][ T9094] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 90.750021][ T9094] ? apparmor_socket_sendmsg+0x2a/0x30 [ 90.755676][ T9094] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.762316][ T9094] ? security_socket_sendmsg+0x8d/0xc0 [ 90.768152][ T9094] ? netlink_unicast+0x710/0x710 [ 90.773083][ T9094] sock_sendmsg+0xd7/0x130 [ 90.777489][ T9094] ___sys_sendmsg+0x803/0x920 [ 90.782162][ T9094] ? copy_msghdr_from_user+0x430/0x430 [ 90.787615][ T9094] ? prep_transhuge_page+0xa0/0xa0 [ 90.792710][ T9094] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.798937][ T9094] ? __handle_mm_fault+0x7cb/0x3eb0 [ 90.804225][ T9094] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 90.810556][ T9094] ? __fget_light+0x1a9/0x230 [ 90.815222][ T9094] ? __fdget+0x1b/0x20 [ 90.819285][ T9094] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 90.825515][ T9094] __sys_sendmsg+0x105/0x1d0 [ 90.830095][ T9094] ? __ia32_sys_shutdown+0x80/0x80 [ 90.835197][ T9094] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 90.840737][ T9094] ? do_syscall_64+0x26/0x680 [ 90.845443][ T9094] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 90.851526][ T9094] ? do_syscall_64+0x26/0x680 [ 90.856241][ T9094] __x64_sys_sendmsg+0x78/0xb0 [ 90.861094][ T9094] do_syscall_64+0xfd/0x680 [ 90.865595][ T9094] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 90.871580][ T9094] RIP: 0033:0x440219 [ 90.875597][ T9094] 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 [ 90.895404][ T9094] RSP: 002b:00007fffd03b78b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 90.903892][ T9094] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 90.911864][ T9094] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 90.919839][ T9094] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 90.928097][ T9094] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 90.936065][ T9094] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 90.945545][ T9094] Kernel Offset: disabled [ 90.949876][ T9094] Rebooting in 86400 seconds..