[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 61.801799][ T26] audit: type=1800 audit(1558384793.445:25): pid=8965 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 61.842510][ T26] audit: type=1800 audit(1558384793.445:26): pid=8965 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 61.902374][ T26] audit: type=1800 audit(1558384793.445:27): pid=8965 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 '10.128.0.176' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 73.706408][ T9121] ------------[ cut here ]------------ [ 73.711923][ T9121] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 73.711999][ T9121] WARNING: CPU: 0 PID: 9121 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 73.729726][ T9121] Kernel panic - not syncing: panic_on_warn set ... [ 73.738428][ T9121] CPU: 0 PID: 9121 Comm: syz-executor981 Not tainted 5.1.0+ #1 [ 73.745947][ T9121] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.755996][ T9121] Call Trace: [ 73.759301][ T9121] dump_stack+0x172/0x1f0 [ 73.763612][ T9121] ? __lock_acquire+0x1790/0x5490 [ 73.768615][ T9121] panic+0x2cb/0x646 [ 73.772486][ T9121] ? __warn_printk+0xf3/0xf3 [ 73.777057][ T9121] ? __lock_acquire+0x17b5/0x5490 [ 73.782054][ T9121] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 73.788297][ T9121] ? __warn.cold+0x5/0x4b [ 73.792623][ T9121] ? __warn+0xe8/0x1d0 [ 73.796681][ T9121] ? __lock_acquire+0x17b5/0x5490 [ 73.801680][ T9121] __warn.cold+0x20/0x4b [ 73.805901][ T9121] ? vprintk_emit+0x1ce/0x6d0 [ 73.810555][ T9121] ? __lock_acquire+0x17b5/0x5490 [ 73.815556][ T9121] report_bug+0x263/0x2b0 [ 73.819883][ T9121] do_error_trap+0x11b/0x200 [ 73.824456][ T9121] do_invalid_op+0x37/0x50 [ 73.829020][ T9121] ? __lock_acquire+0x17b5/0x5490 [ 73.834035][ T9121] invalid_op+0x14/0x20 [ 73.838166][ T9121] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 73.843776][ T9121] 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 [ 73.863362][ T9121] RSP: 0018:ffff8880924a73e0 EFLAGS: 00010086 [ 73.869405][ T9121] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 73.877354][ T9121] RDX: 0000000000000000 RSI: ffffffff815ab116 RDI: ffffed1012494e6e [ 73.885302][ T9121] RBP: ffff8880924a7588 R08: ffff888085dc8280 R09: fffffbfff1173025 [ 73.893252][ T9121] R10: fffffbfff1173024 R11: ffffffff88b98123 R12: 000000008f576d8f [ 73.901348][ T9121] R13: 0000000000000000 R14: 0000000000040d8f R15: 0000000000000000 [ 73.909311][ T9121] ? vprintk_func+0x86/0x189 [ 73.914057][ T9121] ? sock_diag_rcv+0x2b/0x40 [ 73.918621][ T9121] ? netlink_unicast+0x531/0x710 [ 73.923610][ T9121] ? netlink_sendmsg+0x8ae/0xd70 [ 73.928529][ T9121] ? sock_sendmsg+0xd7/0x130 [ 73.933096][ T9121] ? ___sys_sendmsg+0x803/0x920 [ 73.937923][ T9121] ? __sys_sendmsg+0x105/0x1d0 [ 73.942668][ T9121] ? __x64_sys_sendmsg+0x78/0xb0 [ 73.947589][ T9121] ? do_syscall_64+0xfd/0x680 [ 73.952252][ T9121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 73.958322][ T9121] ? mark_held_locks+0xf0/0xf0 [ 73.963066][ T9121] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 73.968673][ T9121] ? find_held_lock+0x35/0x130 [ 73.973417][ T9121] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 73.979049][ T9121] lock_acquire+0x16f/0x3f0 [ 73.983536][ T9121] ? rhashtable_walk_enter+0xf9/0x390 [ 73.988985][ T9121] _raw_spin_lock+0x2f/0x40 [ 73.993469][ T9121] ? rhashtable_walk_enter+0xf9/0x390 [ 73.998830][ T9121] rhashtable_walk_enter+0xf9/0x390 [ 74.004008][ T9121] __tipc_dump_start+0x1fa/0x3c0 [ 74.008921][ T9121] tipc_dump_start+0x70/0x90 [ 74.013486][ T9121] __netlink_dump_start+0x4f8/0x7d0 [ 74.018656][ T9121] ? __tipc_dump_start+0x3c0/0x3c0 [ 74.023741][ T9121] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 74.029525][ T9121] ? __tipc_diag_gen_cookie+0x90/0x90 [ 74.034893][ T9121] ? sock_diag_rcv+0x1c/0x40 [ 74.039461][ T9121] ? __tipc_dump_start+0x3c0/0x3c0 [ 74.044658][ T9121] ? tipc_unregister_sysctl+0x20/0x20 [ 74.050018][ T9121] ? tipc_ioctl+0x2e0/0x2e0 [ 74.054524][ T9121] sock_diag_rcv_msg+0x319/0x410 [ 74.059445][ T9121] netlink_rcv_skb+0x177/0x450 [ 74.064188][ T9121] ? sock_diag_bind+0x80/0x80 [ 74.068843][ T9121] ? netlink_ack+0xb50/0xb50 [ 74.073407][ T9121] ? kasan_check_read+0x11/0x20 [ 74.078233][ T9121] ? netlink_deliver_tap+0x254/0xbf0 [ 74.083512][ T9121] sock_diag_rcv+0x2b/0x40 [ 74.087997][ T9121] netlink_unicast+0x531/0x710 [ 74.092766][ T9121] ? netlink_attachskb+0x770/0x770 [ 74.097857][ T9121] ? _copy_from_iter_full+0x25d/0x8c0 [ 74.103206][ T9121] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 74.108914][ T9121] ? __check_object_size+0x3d/0x42f [ 74.114092][ T9121] netlink_sendmsg+0x8ae/0xd70 [ 74.118833][ T9121] ? netlink_unicast+0x710/0x710 [ 74.123798][ T9121] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 74.129341][ T9121] ? apparmor_socket_sendmsg+0x2a/0x30 [ 74.134778][ T9121] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.140998][ T9121] ? security_socket_sendmsg+0x8d/0xc0 [ 74.146437][ T9121] ? netlink_unicast+0x710/0x710 [ 74.151352][ T9121] sock_sendmsg+0xd7/0x130 [ 74.155759][ T9121] ___sys_sendmsg+0x803/0x920 [ 74.160504][ T9121] ? copy_msghdr_from_user+0x430/0x430 [ 74.165944][ T9121] ? prep_transhuge_page+0xa0/0xa0 [ 74.171042][ T9121] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.177294][ T9121] ? __handle_mm_fault+0x7cb/0x3eb0 [ 74.182492][ T9121] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 74.188711][ T9121] ? __fget_light+0x1a9/0x230 [ 74.193368][ T9121] ? __fdget+0x1b/0x20 [ 74.197414][ T9121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 74.203634][ T9121] __sys_sendmsg+0x105/0x1d0 [ 74.208200][ T9121] ? __ia32_sys_shutdown+0x80/0x80 [ 74.213292][ T9121] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 74.218748][ T9121] ? do_syscall_64+0x26/0x680 [ 74.223411][ T9121] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.229471][ T9121] ? do_syscall_64+0x26/0x680 [ 74.234131][ T9121] __x64_sys_sendmsg+0x78/0xb0 [ 74.238874][ T9121] do_syscall_64+0xfd/0x680 [ 74.243360][ T9121] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 74.249228][ T9121] RIP: 0033:0x440209 [ 74.253102][ T9121] 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 [ 74.272689][ T9121] RSP: 002b:00007ffc7306adc8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 74.281098][ T9121] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440209 [ 74.289050][ T9121] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 74.297090][ T9121] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 74.305061][ T9121] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a90 [ 74.313016][ T9121] R13: 0000000000401b20 R14: 0000000000000000 R15: 0000000000000000 [ 74.322031][ T9121] Kernel Offset: disabled [ 74.326368][ T9121] Rebooting in 86400 seconds..