[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.165264][ T26] audit: type=1800 audit(1558389376.515:25): pid=8409 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.196079][ T26] audit: type=1800 audit(1558389376.525:26): pid=8409 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.236596][ T26] audit: type=1800 audit(1558389376.525:27): pid=8409 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[ 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 '10.128.0.247' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.367917][ T8564] ------------[ cut here ]------------ [ 73.373601][ T8564] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 73.373670][ T8564] WARNING: CPU: 1 PID: 8564 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 73.390099][ T8564] Kernel panic - not syncing: panic_on_warn set ... [ 73.396661][ T8564] CPU: 1 PID: 8564 Comm: syz-executor626 Not tainted 5.2.0-rc1+ #1 [ 73.404520][ T8564] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.414547][ T8564] Call Trace: [ 73.417819][ T8564] dump_stack+0x172/0x1f0 [ 73.422123][ T8564] ? __lock_acquire+0x16d0/0x5490 [ 73.427120][ T8564] panic+0x2cb/0x744 [ 73.430988][ T8564] ? __warn_printk+0xf3/0xf3 [ 73.435549][ T8564] ? __lock_acquire+0x17b5/0x5490 [ 73.440553][ T8564] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.446768][ T8564] ? __warn.cold+0x5/0x4d [ 73.451068][ T8564] ? __warn+0xe8/0x1d0 [ 73.455107][ T8564] ? __lock_acquire+0x17b5/0x5490 [ 73.460102][ T8564] __warn.cold+0x20/0x4d [ 73.464317][ T8564] ? vprintk_emit+0x1ea/0x700 [ 73.468966][ T8564] ? __lock_acquire+0x17b5/0x5490 [ 73.473963][ T8564] report_bug+0x263/0x2b0 [ 73.478265][ T8564] do_error_trap+0x11b/0x200 [ 73.482828][ T8564] do_invalid_op+0x37/0x50 [ 73.487235][ T8564] ? __lock_acquire+0x17b5/0x5490 [ 73.492237][ T8564] invalid_op+0x14/0x20 [ 73.496367][ T8564] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 73.501970][ T8564] 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 [ 73.521547][ T8564] RSP: 0018:ffff8880947b73e0 EFLAGS: 00010086 [ 73.527584][ T8564] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 73.535538][ T8564] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed10128f6e6e [ 73.543483][ T8564] RBP: ffff8880947b7588 R08: ffff88809750c040 R09: fffffbfff11730e9 [ 73.551428][ T8564] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000e8b8f25e [ 73.559378][ T8564] R13: 0000000000000000 R14: 000000000004125e R15: 0000000000000000 [ 73.567420][ T8564] ? vprintk_func+0x86/0x189 [ 73.571987][ T8564] ? sock_diag_rcv+0x2b/0x40 [ 73.576555][ T8564] ? netlink_unicast+0x531/0x710 [ 73.581465][ T8564] ? netlink_sendmsg+0x8ae/0xd70 [ 73.586377][ T8564] ? sock_sendmsg+0xd7/0x130 [ 73.590939][ T8564] ? ___sys_sendmsg+0x803/0x920 [ 73.595758][ T8564] ? __sys_sendmsg+0x105/0x1d0 [ 73.600495][ T8564] ? __x64_sys_sendmsg+0x78/0xb0 [ 73.605406][ T8564] ? do_syscall_64+0xfd/0x680 [ 73.610081][ T8564] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.616142][ T8564] ? mark_held_locks+0xf0/0xf0 [ 73.620884][ T8564] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 73.626489][ T8564] ? find_held_lock+0x35/0x130 [ 73.631233][ T8564] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 73.636845][ T8564] lock_acquire+0x16f/0x3f0 [ 73.641329][ T8564] ? rhashtable_walk_enter+0xf9/0x390 [ 73.646692][ T8564] _raw_spin_lock+0x2f/0x40 [ 73.651169][ T8564] ? rhashtable_walk_enter+0xf9/0x390 [ 73.656515][ T8564] rhashtable_walk_enter+0xf9/0x390 [ 73.661689][ T8564] __tipc_dump_start+0x1fa/0x3c0 [ 73.666600][ T8564] tipc_dump_start+0x70/0x90 [ 73.671175][ T8564] __netlink_dump_start+0x4f8/0x7d0 [ 73.676347][ T8564] ? __tipc_dump_start+0x3c0/0x3c0 [ 73.681446][ T8564] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 73.687228][ T8564] ? __tipc_diag_gen_cookie+0x90/0x90 [ 73.692573][ T8564] ? sock_diag_rcv+0x1c/0x40 [ 73.697139][ T8564] ? __tipc_dump_start+0x3c0/0x3c0 [ 73.702225][ T8564] ? tipc_unregister_sysctl+0x20/0x20 [ 73.707573][ T8564] ? tipc_ioctl+0x2e0/0x2e0 [ 73.712051][ T8564] sock_diag_rcv_msg+0x319/0x410 [ 73.716964][ T8564] netlink_rcv_skb+0x177/0x450 [ 73.721716][ T8564] ? sock_diag_bind+0x80/0x80 [ 73.726366][ T8564] ? netlink_ack+0xb50/0xb50 [ 73.730931][ T8564] ? kasan_check_read+0x11/0x20 [ 73.735850][ T8564] ? netlink_deliver_tap+0x254/0xbf0 [ 73.741107][ T8564] sock_diag_rcv+0x2b/0x40 [ 73.745496][ T8564] netlink_unicast+0x531/0x710 [ 73.750236][ T8564] ? netlink_attachskb+0x770/0x770 [ 73.755324][ T8564] ? _copy_from_iter_full+0x25d/0x8c0 [ 73.760673][ T8564] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 73.766371][ T8564] ? __check_object_size+0x3d/0x42f [ 73.771544][ T8564] netlink_sendmsg+0x8ae/0xd70 [ 73.776287][ T8564] ? netlink_unicast+0x710/0x710 [ 73.781205][ T8564] ? tomoyo_socket_sendmsg+0x26/0x30 [ 73.786463][ T8564] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.792673][ T8564] ? security_socket_sendmsg+0x8d/0xc0 [ 73.802226][ T8564] ? netlink_unicast+0x710/0x710 [ 73.807834][ T8564] sock_sendmsg+0xd7/0x130 [ 73.812226][ T8564] ___sys_sendmsg+0x803/0x920 [ 73.816884][ T8564] ? copy_msghdr_from_user+0x430/0x430 [ 73.822326][ T8564] ? prep_transhuge_page+0xa0/0xa0 [ 73.827425][ T8564] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.833639][ T8564] ? __handle_mm_fault+0x7cb/0x3eb0 [ 73.838816][ T8564] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.845026][ T8564] ? __fget_light+0x1a9/0x230 [ 73.849673][ T8564] ? __fdget+0x1b/0x20 [ 73.853715][ T8564] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 73.859933][ T8564] __sys_sendmsg+0x105/0x1d0 [ 73.864504][ T8564] ? __ia32_sys_shutdown+0x80/0x80 [ 73.869601][ T8564] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 73.875049][ T8564] ? do_syscall_64+0x26/0x680 [ 73.879708][ T8564] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.885767][ T8564] ? do_syscall_64+0x26/0x680 [ 73.890418][ T8564] __x64_sys_sendmsg+0x78/0xb0 [ 73.895154][ T8564] do_syscall_64+0xfd/0x680 [ 73.899651][ T8564] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.905516][ T8564] RIP: 0033:0x440219 [ 73.909401][ T8564] 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 [ 73.928979][ T8564] RSP: 002b:00007ffcb9d434a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 73.937364][ T8564] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 73.945307][ T8564] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 73.953252][ T8564] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.961199][ T8564] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 73.969143][ T8564] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 73.978268][ T8564] Kernel Offset: disabled [ 73.982590][ T8564] Rebooting in 86400 seconds..