[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 57.943790][ T27] audit: type=1800 audit(1558416834.438:25): pid=8650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 57.989933][ T27] audit: type=1800 audit(1558416834.438:26): pid=8650 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.013873][ T27] audit: type=1800 audit(1558416834.448:27): pid=8650 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 '10.128.0.229' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.300428][ T8804] ------------[ cut here ]------------ [ 70.307049][ T8804] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 70.307126][ T8804] WARNING: CPU: 0 PID: 8804 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 70.324344][ T8804] Kernel panic - not syncing: panic_on_warn set ... [ 70.331911][ T8804] CPU: 0 PID: 8804 Comm: syz-executor177 Not tainted 5.2.0-rc1+ #1 [ 70.341436][ T8804] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.352871][ T8804] Call Trace: [ 70.356344][ T8804] dump_stack+0x172/0x1f0 [ 70.361357][ T8804] ? __lock_acquire+0x16d0/0x5490 [ 70.366606][ T8804] panic+0x2cb/0x744 [ 70.371544][ T8804] ? __warn_printk+0xf3/0xf3 [ 70.377117][ T8804] ? __lock_acquire+0x17b5/0x5490 [ 70.382565][ T8804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.389381][ T8804] ? __warn.cold+0x5/0x4d [ 70.393901][ T8804] ? __warn+0xe8/0x1d0 [ 70.398636][ T8804] ? __lock_acquire+0x17b5/0x5490 [ 70.403749][ T8804] __warn.cold+0x20/0x4d [ 70.408557][ T8804] ? vprintk_emit+0x1ea/0x700 [ 70.413713][ T8804] ? __lock_acquire+0x17b5/0x5490 [ 70.419271][ T8804] report_bug+0x263/0x2b0 [ 70.424064][ T8804] do_error_trap+0x11b/0x200 [ 70.429086][ T8804] do_invalid_op+0x37/0x50 [ 70.434090][ T8804] ? __lock_acquire+0x17b5/0x5490 [ 70.439334][ T8804] invalid_op+0x14/0x20 [ 70.443774][ T8804] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 70.449678][ T8804] 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 [ 70.471033][ T8804] RSP: 0018:ffff8880902173e0 EFLAGS: 00010086 [ 70.477356][ T8804] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 70.486069][ T8804] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1012042e6e [ 70.494927][ T8804] RBP: ffff888090217588 R08: ffff888093b14400 R09: fffffbfff11730e9 [ 70.504418][ T8804] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000767cd411 [ 70.513568][ T8804] R13: 0000000000000000 R14: 0000000000041411 R15: 0000000000000000 [ 70.522648][ T8804] ? vprintk_func+0x86/0x189 [ 70.527466][ T8804] ? sock_diag_rcv+0x2b/0x40 [ 70.532322][ T8804] ? netlink_unicast+0x531/0x710 [ 70.538109][ T8804] ? netlink_sendmsg+0x8ae/0xd70 [ 70.543881][ T8804] ? sock_sendmsg+0xd7/0x130 [ 70.549557][ T8804] ? ___sys_sendmsg+0x803/0x920 [ 70.555027][ T8804] ? __sys_sendmsg+0x105/0x1d0 [ 70.560414][ T8804] ? __x64_sys_sendmsg+0x78/0xb0 [ 70.566113][ T8804] ? do_syscall_64+0xfd/0x680 [ 70.571967][ T8804] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.578380][ T8804] ? mark_held_locks+0xf0/0xf0 [ 70.583817][ T8804] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.590328][ T8804] ? find_held_lock+0x35/0x130 [ 70.595795][ T8804] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 70.601835][ T8804] lock_acquire+0x16f/0x3f0 [ 70.606690][ T8804] ? rhashtable_walk_enter+0xf9/0x390 [ 70.612552][ T8804] _raw_spin_lock+0x2f/0x40 [ 70.617593][ T8804] ? rhashtable_walk_enter+0xf9/0x390 [ 70.624056][ T8804] rhashtable_walk_enter+0xf9/0x390 [ 70.629965][ T8804] __tipc_dump_start+0x1fa/0x3c0 [ 70.635803][ T8804] tipc_dump_start+0x70/0x90 [ 70.640603][ T8804] __netlink_dump_start+0x4f8/0x7d0 [ 70.646717][ T8804] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.652214][ T8804] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 70.658732][ T8804] ? __tipc_diag_gen_cookie+0x90/0x90 [ 70.664902][ T8804] ? sock_diag_rcv+0x1c/0x40 [ 70.671591][ T8804] ? __tipc_dump_start+0x3c0/0x3c0 [ 70.677753][ T8804] ? tipc_unregister_sysctl+0x20/0x20 [ 70.683473][ T8804] ? tipc_ioctl+0x2e0/0x2e0 [ 70.689555][ T8804] sock_diag_rcv_msg+0x319/0x410 [ 70.695698][ T8804] netlink_rcv_skb+0x177/0x450 [ 70.700582][ T8804] ? sock_diag_bind+0x80/0x80 [ 70.705379][ T8804] ? netlink_ack+0xb50/0xb50 [ 70.709981][ T8804] ? kasan_check_read+0x11/0x20 [ 70.715426][ T8804] ? netlink_deliver_tap+0x254/0xbf0 [ 70.721252][ T8804] sock_diag_rcv+0x2b/0x40 [ 70.725763][ T8804] netlink_unicast+0x531/0x710 [ 70.730830][ T8804] ? netlink_attachskb+0x770/0x770 [ 70.736464][ T8804] ? _copy_from_iter_full+0x25d/0x8c0 [ 70.742356][ T8804] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 70.749189][ T8804] ? __check_object_size+0x3d/0x42f [ 70.755094][ T8804] netlink_sendmsg+0x8ae/0xd70 [ 70.760052][ T8804] ? netlink_unicast+0x710/0x710 [ 70.765179][ T8804] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 70.771585][ T8804] ? apparmor_socket_sendmsg+0x2a/0x30 [ 70.778160][ T8804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.784694][ T8804] ? security_socket_sendmsg+0x8d/0xc0 [ 70.792625][ T8804] ? netlink_unicast+0x710/0x710 [ 70.798368][ T8804] sock_sendmsg+0xd7/0x130 [ 70.803351][ T8804] ___sys_sendmsg+0x803/0x920 [ 70.809500][ T8804] ? copy_msghdr_from_user+0x430/0x430 [ 70.815423][ T8804] ? prep_transhuge_page+0xa0/0xa0 [ 70.821372][ T8804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.827971][ T8804] ? __handle_mm_fault+0x7cb/0x3eb0 [ 70.834471][ T8804] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.841321][ T8804] ? __fget_light+0x1a9/0x230 [ 70.846516][ T8804] ? __fdget+0x1b/0x20 [ 70.850847][ T8804] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 70.857660][ T8804] __sys_sendmsg+0x105/0x1d0 [ 70.862804][ T8804] ? __ia32_sys_shutdown+0x80/0x80 [ 70.868176][ T8804] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 70.874655][ T8804] ? do_syscall_64+0x26/0x680 [ 70.880591][ T8804] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.886810][ T8804] ? do_syscall_64+0x26/0x680 [ 70.891903][ T8804] __x64_sys_sendmsg+0x78/0xb0 [ 70.897233][ T8804] do_syscall_64+0xfd/0x680 [ 70.901937][ T8804] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 70.908077][ T8804] RIP: 0033:0x440219 [ 70.912296][ T8804] 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 [ 70.933464][ T8804] RSP: 002b:00007ffc1804b948 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 70.943579][ T8804] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 70.951948][ T8804] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 70.961318][ T8804] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 70.969646][ T8804] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 70.978511][ T8804] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 70.988438][ T8804] Kernel Offset: disabled [ 70.993104][ T8804] Rebooting in 86400 seconds..