[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.946341][ T26] audit: type=1800 audit(1558396249.855:25): pid=8874 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.985318][ T26] audit: type=1800 audit(1558396249.855:26): pid=8874 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.021166][ T26] audit: type=1800 audit(1558396249.865:27): pid=8874 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 '10.128.1.44' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 85.895271][ T9026] ------------[ cut here ]------------ [ 85.900767][ T9026] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 85.900842][ T9026] WARNING: CPU: 1 PID: 9026 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 85.917426][ T9026] Kernel panic - not syncing: panic_on_warn set ... [ 85.924011][ T9026] CPU: 1 PID: 9026 Comm: syz-executor087 Not tainted 5.2.0-rc1+ #20 [ 85.931964][ T9026] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.942016][ T9026] Call Trace: [ 85.945300][ T9026] dump_stack+0x172/0x1f0 [ 85.949618][ T9026] ? __lock_acquire+0x16d0/0x5490 [ 85.954636][ T9026] panic+0x2cb/0x744 [ 85.958568][ T9026] ? __warn_printk+0xf3/0xf3 [ 85.963153][ T9026] ? __lock_acquire+0x17b5/0x5490 [ 85.968168][ T9026] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 85.974397][ T9026] ? __warn.cold+0x5/0x4d [ 85.978725][ T9026] ? __warn+0xe8/0x1d0 [ 85.982810][ T9026] ? __lock_acquire+0x17b5/0x5490 [ 85.988368][ T9026] __warn.cold+0x20/0x4d [ 85.992793][ T9026] ? vprintk_emit+0x1ea/0x700 [ 85.997477][ T9026] ? __lock_acquire+0x17b5/0x5490 [ 86.002540][ T9026] report_bug+0x263/0x2b0 [ 86.007030][ T9026] do_error_trap+0x11b/0x200 [ 86.011721][ T9026] do_invalid_op+0x37/0x50 [ 86.016128][ T9026] ? __lock_acquire+0x17b5/0x5490 [ 86.021140][ T9026] invalid_op+0x14/0x20 [ 86.025322][ T9026] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 86.031092][ T9026] 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 [ 86.050781][ T9026] RSP: 0018:ffff88808576f3e0 EFLAGS: 00010086 [ 86.056838][ T9026] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 86.064801][ T9026] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1010aede6e [ 86.072769][ T9026] RBP: ffff88808576f588 R08: ffff888098254580 R09: fffffbfff11730e9 [ 86.080737][ T9026] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 0000000019658d66 [ 86.088756][ T9026] R13: 0000000000000000 R14: 0000000000040d66 R15: 0000000000000000 [ 86.096750][ T9026] ? vprintk_func+0x86/0x189 [ 86.101347][ T9026] ? sock_diag_rcv+0x2b/0x40 [ 86.105924][ T9026] ? netlink_unicast+0x531/0x710 [ 86.110848][ T9026] ? netlink_sendmsg+0x8ae/0xd70 [ 86.115786][ T9026] ? sock_sendmsg+0xd7/0x130 [ 86.120381][ T9026] ? ___sys_sendmsg+0x803/0x920 [ 86.125218][ T9026] ? __sys_sendmsg+0x105/0x1d0 [ 86.129976][ T9026] ? __x64_sys_sendmsg+0x78/0xb0 [ 86.134913][ T9026] ? do_syscall_64+0xfd/0x680 [ 86.139584][ T9026] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.145651][ T9026] ? mark_held_locks+0xf0/0xf0 [ 86.150406][ T9026] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 86.156026][ T9026] ? find_held_lock+0x35/0x130 [ 86.160781][ T9026] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 86.166401][ T9026] lock_acquire+0x16f/0x3f0 [ 86.170898][ T9026] ? rhashtable_walk_enter+0xf9/0x390 [ 86.176264][ T9026] _raw_spin_lock+0x2f/0x40 [ 86.180757][ T9026] ? rhashtable_walk_enter+0xf9/0x390 [ 86.186221][ T9026] rhashtable_walk_enter+0xf9/0x390 [ 86.191416][ T9026] __tipc_dump_start+0x1fa/0x3c0 [ 86.196399][ T9026] tipc_dump_start+0x70/0x90 [ 86.201026][ T9026] __netlink_dump_start+0x4f8/0x7d0 [ 86.206213][ T9026] ? __tipc_dump_start+0x3c0/0x3c0 [ 86.211318][ T9026] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 86.217109][ T9026] ? __tipc_diag_gen_cookie+0x90/0x90 [ 86.222499][ T9026] ? __tipc_dump_start+0x3c0/0x3c0 [ 86.227598][ T9026] ? tipc_unregister_sysctl+0x20/0x20 [ 86.233008][ T9026] ? tipc_ioctl+0x2e0/0x2e0 [ 86.237525][ T9026] sock_diag_rcv_msg+0x319/0x410 [ 86.242459][ T9026] netlink_rcv_skb+0x177/0x450 [ 86.247215][ T9026] ? sock_diag_bind+0x80/0x80 [ 86.251887][ T9026] ? netlink_ack+0xb50/0xb50 [ 86.256464][ T9026] ? kasan_check_read+0x11/0x20 [ 86.261304][ T9026] ? netlink_deliver_tap+0x254/0xbf0 [ 86.266695][ T9026] sock_diag_rcv+0x2b/0x40 [ 86.271263][ T9026] netlink_unicast+0x531/0x710 [ 86.276063][ T9026] ? netlink_attachskb+0x770/0x770 [ 86.281162][ T9026] ? _copy_from_iter_full+0x25d/0x8c0 [ 86.286524][ T9026] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 86.292576][ T9026] ? __check_object_size+0x3d/0x42f [ 86.297879][ T9026] netlink_sendmsg+0x8ae/0xd70 [ 86.302706][ T9026] ? netlink_unicast+0x710/0x710 [ 86.307770][ T9026] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 86.313334][ T9026] ? apparmor_socket_sendmsg+0x2a/0x30 [ 86.318797][ T9026] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.325040][ T9026] ? security_socket_sendmsg+0x8d/0xc0 [ 86.330541][ T9026] ? netlink_unicast+0x710/0x710 [ 86.335478][ T9026] sock_sendmsg+0xd7/0x130 [ 86.339949][ T9026] ___sys_sendmsg+0x803/0x920 [ 86.344834][ T9026] ? copy_msghdr_from_user+0x430/0x430 [ 86.350332][ T9026] ? prep_transhuge_page+0xa0/0xa0 [ 86.355448][ T9026] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.361695][ T9026] ? __handle_mm_fault+0x7cb/0x3eb0 [ 86.367009][ T9026] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 86.373429][ T9026] ? __fget_light+0x1a9/0x230 [ 86.378108][ T9026] ? __fdget+0x1b/0x20 [ 86.382172][ T9026] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 86.388459][ T9026] __sys_sendmsg+0x105/0x1d0 [ 86.393156][ T9026] ? __ia32_sys_shutdown+0x80/0x80 [ 86.398323][ T9026] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 86.403774][ T9026] ? do_syscall_64+0x26/0x680 [ 86.408433][ T9026] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.414488][ T9026] ? do_syscall_64+0x26/0x680 [ 86.419212][ T9026] __x64_sys_sendmsg+0x78/0xb0 [ 86.423977][ T9026] do_syscall_64+0xfd/0x680 [ 86.428481][ T9026] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 86.434366][ T9026] RIP: 0033:0x4401f9 [ 86.438257][ T9026] 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 [ 86.457854][ T9026] RSP: 002b:00007ffcdec5bbf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 86.466391][ T9026] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 [ 86.474482][ T9026] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 86.482545][ T9026] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 86.490713][ T9026] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80 [ 86.498675][ T9026] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 86.507731][ T9026] Kernel Offset: disabled [ 86.512061][ T9026] Rebooting in 86400 seconds..