[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 53.851996][ T26] audit: type=1800 audit(1558386394.077:25): pid=8438 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 53.873682][ T26] audit: type=1800 audit(1558386394.077:26): pid=8438 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 53.904985][ T26] audit: type=1800 audit(1558386394.077:27): pid=8438 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 '10.128.0.208' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.835231][ T8590] ------------[ cut here ]------------ [ 65.840830][ T8590] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 65.840897][ T8590] WARNING: CPU: 0 PID: 8590 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 65.857332][ T8590] Kernel panic - not syncing: panic_on_warn set ... [ 65.863947][ T8590] CPU: 0 PID: 8590 Comm: syz-executor817 Not tainted 5.1.0+ #1 [ 65.871466][ T8590] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.881499][ T8590] Call Trace: [ 65.884772][ T8590] dump_stack+0x172/0x1f0 [ 65.889084][ T8590] ? __lock_acquire+0x1790/0x5490 [ 65.894086][ T8590] panic+0x2cb/0x646 [ 65.897955][ T8590] ? __warn_printk+0xf3/0xf3 [ 65.902520][ T8590] ? __lock_acquire+0x17b5/0x5490 [ 65.907520][ T8590] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.913734][ T8590] ? __warn.cold+0x5/0x4b [ 65.918039][ T8590] ? __warn+0xe8/0x1d0 [ 65.922110][ T8590] ? __lock_acquire+0x17b5/0x5490 [ 65.927125][ T8590] __warn.cold+0x20/0x4b [ 65.931343][ T8590] ? vprintk_emit+0x1ce/0x6d0 [ 65.936001][ T8590] ? __lock_acquire+0x17b5/0x5490 [ 65.941004][ T8590] report_bug+0x263/0x2b0 [ 65.945330][ T8590] do_error_trap+0x11b/0x200 [ 65.949905][ T8590] do_invalid_op+0x37/0x50 [ 65.954294][ T8590] ? __lock_acquire+0x17b5/0x5490 [ 65.959291][ T8590] invalid_op+0x14/0x20 [ 65.963419][ T8590] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 65.969023][ T8590] 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 [ 65.988598][ T8590] RSP: 0018:ffff88809658f3e0 EFLAGS: 00010086 [ 65.994652][ T8590] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 66.002601][ T8590] RDX: 0000000000000000 RSI: ffffffff815ab116 RDI: ffffed1012cb1e6e [ 66.010560][ T8590] RBP: ffff88809658f588 R08: ffff8880a4d66480 R09: fffffbfff1173025 [ 66.018507][ T8590] R10: fffffbfff1173024 R11: ffffffff88b98123 R12: 0000000045d0383e [ 66.026459][ T8590] R13: 0000000000000000 R14: 000000000004183e R15: 0000000000000000 [ 66.034432][ T8590] ? vprintk_func+0x86/0x189 [ 66.038998][ T8590] ? sock_diag_rcv+0x2b/0x40 [ 66.043560][ T8590] ? netlink_unicast+0x531/0x710 [ 66.048477][ T8590] ? netlink_sendmsg+0x8ae/0xd70 [ 66.053388][ T8590] ? sock_sendmsg+0xd7/0x130 [ 66.057952][ T8590] ? ___sys_sendmsg+0x803/0x920 [ 66.062773][ T8590] ? __sys_sendmsg+0x105/0x1d0 [ 66.067505][ T8590] ? __x64_sys_sendmsg+0x78/0xb0 [ 66.072432][ T8590] ? do_syscall_64+0xfd/0x680 [ 66.077086][ T8590] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.083158][ T8590] ? mark_held_locks+0xf0/0xf0 [ 66.087913][ T8590] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.093524][ T8590] ? find_held_lock+0x35/0x130 [ 66.098263][ T8590] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.103888][ T8590] lock_acquire+0x16f/0x3f0 [ 66.108388][ T8590] ? rhashtable_walk_enter+0xf9/0x390 [ 66.113740][ T8590] _raw_spin_lock+0x2f/0x40 [ 66.118223][ T8590] ? rhashtable_walk_enter+0xf9/0x390 [ 66.123567][ T8590] rhashtable_walk_enter+0xf9/0x390 [ 66.128743][ T8590] __tipc_dump_start+0x1fa/0x3c0 [ 66.133654][ T8590] tipc_dump_start+0x70/0x90 [ 66.138215][ T8590] __netlink_dump_start+0x4f8/0x7d0 [ 66.143388][ T8590] ? __tipc_dump_start+0x3c0/0x3c0 [ 66.148985][ T8590] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 66.154764][ T8590] ? __tipc_diag_gen_cookie+0x90/0x90 [ 66.160116][ T8590] ? preempt_schedule+0x4b/0x60 [ 66.164961][ T8590] ? __tipc_dump_start+0x3c0/0x3c0 [ 66.170052][ T8590] ? tipc_unregister_sysctl+0x20/0x20 [ 66.175397][ T8590] ? tipc_ioctl+0x2e0/0x2e0 [ 66.179888][ T8590] sock_diag_rcv_msg+0x319/0x410 [ 66.184823][ T8590] netlink_rcv_skb+0x177/0x450 [ 66.189565][ T8590] ? sock_diag_bind+0x80/0x80 [ 66.194220][ T8590] ? netlink_ack+0xb50/0xb50 [ 66.198786][ T8590] ? kasan_check_read+0x11/0x20 [ 66.203630][ T8590] ? netlink_deliver_tap+0x254/0xbf0 [ 66.208894][ T8590] sock_diag_rcv+0x2b/0x40 [ 66.213282][ T8590] netlink_unicast+0x531/0x710 [ 66.218016][ T8590] ? netlink_attachskb+0x770/0x770 [ 66.223104][ T8590] ? _copy_from_iter_full+0x25d/0x8c0 [ 66.228456][ T8590] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 66.234159][ T8590] ? __check_object_size+0x3d/0x42f [ 66.239328][ T8590] netlink_sendmsg+0x8ae/0xd70 [ 66.244065][ T8590] ? netlink_unicast+0x710/0x710 [ 66.248979][ T8590] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 66.254497][ T8590] ? apparmor_socket_sendmsg+0x2a/0x30 [ 66.259940][ T8590] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.266157][ T8590] ? security_socket_sendmsg+0x8d/0xc0 [ 66.271592][ T8590] ? netlink_unicast+0x710/0x710 [ 66.276509][ T8590] sock_sendmsg+0xd7/0x130 [ 66.280903][ T8590] ___sys_sendmsg+0x803/0x920 [ 66.285557][ T8590] ? copy_msghdr_from_user+0x430/0x430 [ 66.290999][ T8590] ? prep_transhuge_page+0xa0/0xa0 [ 66.296092][ T8590] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.302310][ T8590] ? __handle_mm_fault+0x7cb/0x3eb0 [ 66.307484][ T8590] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.313697][ T8590] ? __fget_light+0x1a9/0x230 [ 66.318348][ T8590] ? __fdget+0x1b/0x20 [ 66.322389][ T8590] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 66.328605][ T8590] __sys_sendmsg+0x105/0x1d0 [ 66.333187][ T8590] ? __ia32_sys_shutdown+0x80/0x80 [ 66.338276][ T8590] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 66.343704][ T8590] ? do_syscall_64+0x26/0x680 [ 66.348357][ T8590] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.354484][ T8590] ? do_syscall_64+0x26/0x680 [ 66.359140][ T8590] __x64_sys_sendmsg+0x78/0xb0 [ 66.363876][ T8590] do_syscall_64+0xfd/0x680 [ 66.368360][ T8590] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.374225][ T8590] RIP: 0033:0x440219 [ 66.378104][ T8590] 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 [ 66.397680][ T8590] RSP: 002b:00007ffd95b5b968 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 66.406062][ T8590] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 66.414007][ T8590] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 66.421956][ T8590] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 66.429901][ T8590] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 66.437846][ T8590] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 66.447144][ T8590] Kernel Offset: disabled [ 66.451471][ T8590] Rebooting in 86400 seconds..