[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 63.903876][ T26] audit: type=1800 audit(1558476058.609:25): pid=8865 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 63.946979][ T26] audit: type=1800 audit(1558476058.619:26): pid=8865 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 63.996839][ T26] audit: type=1800 audit(1558476058.619:27): pid=8865 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 '10.128.0.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.045827][ T9018] ------------[ cut here ]------------ [ 73.051327][ T9018] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 73.051402][ T9018] WARNING: CPU: 1 PID: 9018 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 73.068982][ T9018] Kernel panic - not syncing: panic_on_warn set ... [ 73.075592][ T9018] CPU: 1 PID: 9018 Comm: syz-executor070 Not tainted 5.2.0-rc1+ #21 [ 73.083555][ T9018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.093597][ T9018] Call Trace: [ 73.096880][ T9018] dump_stack+0x172/0x1f0 [ 73.101226][ T9018] ? __lock_acquire+0x16d0/0x5490 [ 73.106246][ T9018] panic+0x2cb/0x744 [ 73.110145][ T9018] ? __warn_printk+0xf3/0xf3 [ 73.114744][ T9018] ? __lock_acquire+0x17b5/0x5490 [ 73.119783][ T9018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.126057][ T9018] ? __warn.cold+0x5/0x4d [ 73.130378][ T9018] ? __warn+0xe8/0x1d0 [ 73.134544][ T9018] ? __lock_acquire+0x17b5/0x5490 [ 73.139592][ T9018] __warn.cold+0x20/0x4d [ 73.143851][ T9018] ? vprintk_emit+0x1ea/0x700 [ 73.148527][ T9018] ? __lock_acquire+0x17b5/0x5490 [ 73.153554][ T9018] report_bug+0x263/0x2b0 [ 73.157875][ T9018] do_error_trap+0x11b/0x200 [ 73.162465][ T9018] do_invalid_op+0x37/0x50 [ 73.166914][ T9018] ? __lock_acquire+0x17b5/0x5490 [ 73.171959][ T9018] invalid_op+0x14/0x20 [ 73.176110][ T9018] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 73.181738][ T9018] 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 [ 73.201351][ T9018] RSP: 0018:ffff8880973473e0 EFLAGS: 00010086 [ 73.207409][ T9018] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 73.216136][ T9018] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1012e68e6e [ 73.224122][ T9018] RBP: ffff888097347588 R08: ffff88809f3626c0 R09: fffffbfff11730e9 [ 73.232813][ T9018] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 000000003034ef48 [ 73.243317][ T9018] R13: 0000000000000000 R14: 0000000000040f48 R15: 0000000000000000 [ 73.251305][ T9018] ? vprintk_func+0x86/0x189 [ 73.257421][ T9018] ? sock_diag_rcv+0x2b/0x40 [ 73.262012][ T9018] ? netlink_unicast+0x531/0x710 [ 73.266955][ T9018] ? netlink_sendmsg+0x8ae/0xd70 [ 73.272318][ T9018] ? sock_sendmsg+0xd7/0x130 [ 73.276900][ T9018] ? ___sys_sendmsg+0x803/0x920 [ 73.281876][ T9018] ? __sys_sendmsg+0x105/0x1d0 [ 73.286822][ T9018] ? __x64_sys_sendmsg+0x78/0xb0 [ 73.291790][ T9018] ? do_syscall_64+0xfd/0x680 [ 73.296459][ T9018] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.302667][ T9018] ? mark_held_locks+0xf0/0xf0 [ 73.307454][ T9018] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 73.313362][ T9018] ? find_held_lock+0x35/0x130 [ 73.318113][ T9018] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 73.323956][ T9018] lock_acquire+0x16f/0x3f0 [ 73.328447][ T9018] ? rhashtable_walk_enter+0xf9/0x390 [ 73.333925][ T9018] _raw_spin_lock+0x2f/0x40 [ 73.338800][ T9018] ? rhashtable_walk_enter+0xf9/0x390 [ 73.344264][ T9018] rhashtable_walk_enter+0xf9/0x390 [ 73.349869][ T9018] __tipc_dump_start+0x1fa/0x3c0 [ 73.355056][ T9018] tipc_dump_start+0x70/0x90 [ 73.359664][ T9018] __netlink_dump_start+0x4f8/0x7d0 [ 73.364848][ T9018] ? __tipc_dump_start+0x3c0/0x3c0 [ 73.369965][ T9018] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 73.375760][ T9018] ? __tipc_diag_gen_cookie+0x90/0x90 [ 73.381148][ T9018] ? sock_diag_rcv+0x1c/0x40 [ 73.385729][ T9018] ? __tipc_dump_start+0x3c0/0x3c0 [ 73.390834][ T9018] ? tipc_unregister_sysctl+0x20/0x20 [ 73.396222][ T9018] ? tipc_ioctl+0x2e0/0x2e0 [ 73.400724][ T9018] sock_diag_rcv_msg+0x319/0x410 [ 73.405785][ T9018] netlink_rcv_skb+0x177/0x450 [ 73.410558][ T9018] ? sock_diag_bind+0x80/0x80 [ 73.415251][ T9018] ? netlink_ack+0xb50/0xb50 [ 73.419927][ T9018] ? kasan_check_read+0x11/0x20 [ 73.425166][ T9018] ? netlink_deliver_tap+0x254/0xbf0 [ 73.430446][ T9018] sock_diag_rcv+0x2b/0x40 [ 73.434865][ T9018] netlink_unicast+0x531/0x710 [ 73.439633][ T9018] ? netlink_attachskb+0x770/0x770 [ 73.444740][ T9018] ? _copy_from_iter_full+0x25d/0x8c0 [ 73.450118][ T9018] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 73.455830][ T9018] ? __check_object_size+0x3d/0x42f [ 73.461202][ T9018] netlink_sendmsg+0x8ae/0xd70 [ 73.465964][ T9018] ? netlink_unicast+0x710/0x710 [ 73.471139][ T9018] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 73.476707][ T9018] ? apparmor_socket_sendmsg+0x2a/0x30 [ 73.482163][ T9018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.488663][ T9018] ? security_socket_sendmsg+0x8d/0xc0 [ 73.494116][ T9018] ? netlink_unicast+0x710/0x710 [ 73.499049][ T9018] sock_sendmsg+0xd7/0x130 [ 73.504641][ T9018] ___sys_sendmsg+0x803/0x920 [ 73.509312][ T9018] ? copy_msghdr_from_user+0x430/0x430 [ 73.515151][ T9018] ? prep_transhuge_page+0xa0/0xa0 [ 73.520446][ T9018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.526710][ T9018] ? __handle_mm_fault+0x7cb/0x3eb0 [ 73.531920][ T9018] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.538203][ T9018] ? __fget_light+0x1a9/0x230 [ 73.543290][ T9018] ? __fdget+0x1b/0x20 [ 73.547366][ T9018] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 73.553734][ T9018] __sys_sendmsg+0x105/0x1d0 [ 73.558324][ T9018] ? __ia32_sys_shutdown+0x80/0x80 [ 73.563511][ T9018] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 73.569342][ T9018] ? do_syscall_64+0x26/0x680 [ 73.574206][ T9018] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.580264][ T9018] ? do_syscall_64+0x26/0x680 [ 73.584952][ T9018] __x64_sys_sendmsg+0x78/0xb0 [ 73.589728][ T9018] do_syscall_64+0xfd/0x680 [ 73.594237][ T9018] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.600112][ T9018] RIP: 0033:0x440209 [ 73.603990][ T9018] 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 [ 73.623612][ T9018] RSP: 002b:00007ffce930a5a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 73.632524][ T9018] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 73.640493][ T9018] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 73.648465][ T9018] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 73.656445][ T9018] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a90 [ 73.664410][ T9018] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 73.674038][ T9018] Kernel Offset: disabled [ 73.678385][ T9018] Rebooting in 86400 seconds..