[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 56.365347][ T27] audit: type=1800 audit(1558394708.897:25): pid=8401 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 56.402108][ T27] audit: type=1800 audit(1558394708.897:26): pid=8401 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 56.440666][ T27] audit: type=1800 audit(1558394708.907:27): pid=8401 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 '10.128.1.26' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 66.650297][ T8556] ------------[ cut here ]------------ [ 66.655990][ T8556] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 66.656060][ T8556] WARNING: CPU: 0 PID: 8556 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 66.672919][ T8556] Kernel panic - not syncing: panic_on_warn set ... [ 66.679497][ T8556] CPU: 0 PID: 8556 Comm: syz-executor141 Not tainted 5.2.0-rc1+ #1 [ 66.687703][ T8556] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.697737][ T8556] Call Trace: [ 66.701007][ T8556] dump_stack+0x172/0x1f0 [ 66.705314][ T8556] ? __lock_acquire+0x16d0/0x5490 [ 66.710318][ T8556] panic+0x2cb/0x744 [ 66.714194][ T8556] ? __warn_printk+0xf3/0xf3 [ 66.719192][ T8556] ? __lock_acquire+0x17b5/0x5490 [ 66.724193][ T8556] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 66.730560][ T8556] ? __warn.cold+0x5/0x4d [ 66.734977][ T8556] ? __warn+0xe8/0x1d0 [ 66.739108][ T8556] ? __lock_acquire+0x17b5/0x5490 [ 66.744107][ T8556] __warn.cold+0x20/0x4d [ 66.748327][ T8556] ? vprintk_emit+0x1ea/0x700 [ 66.752979][ T8556] ? __lock_acquire+0x17b5/0x5490 [ 66.757977][ T8556] report_bug+0x263/0x2b0 [ 66.762285][ T8556] do_error_trap+0x11b/0x200 [ 66.767991][ T8556] do_invalid_op+0x37/0x50 [ 66.772471][ T8556] ? __lock_acquire+0x17b5/0x5490 [ 66.777658][ T8556] invalid_op+0x14/0x20 [ 66.781813][ T8556] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 66.787424][ T8556] 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 [ 66.808256][ T8556] RSP: 0018:ffff8880853273e0 EFLAGS: 00010086 [ 66.814470][ T8556] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 66.822415][ T8556] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed1010a64e6e [ 66.830372][ T8556] RBP: ffff888085327588 R08: ffff88808a6602c0 R09: fffffbfff11730e9 [ 66.838324][ T8556] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000a3941909 [ 66.846639][ T8556] R13: 0000000000000000 R14: 0000000000041909 R15: 0000000000000000 [ 66.854736][ T8556] ? vprintk_func+0x86/0x189 [ 66.859307][ T8556] ? sock_diag_rcv+0x2b/0x40 [ 66.863880][ T8556] ? netlink_unicast+0x531/0x710 [ 66.868966][ T8556] ? netlink_sendmsg+0x8ae/0xd70 [ 66.873878][ T8556] ? sock_sendmsg+0xd7/0x130 [ 66.878476][ T8556] ? ___sys_sendmsg+0x803/0x920 [ 66.883395][ T8556] ? __sys_sendmsg+0x105/0x1d0 [ 66.888133][ T8556] ? __x64_sys_sendmsg+0x78/0xb0 [ 66.893051][ T8556] ? do_syscall_64+0xfd/0x680 [ 66.897705][ T8556] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 66.903748][ T8556] ? mark_held_locks+0xf0/0xf0 [ 66.908486][ T8556] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.914089][ T8556] ? find_held_lock+0x35/0x130 [ 66.918832][ T8556] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 66.924448][ T8556] lock_acquire+0x16f/0x3f0 [ 66.928926][ T8556] ? rhashtable_walk_enter+0xf9/0x390 [ 66.934271][ T8556] _raw_spin_lock+0x2f/0x40 [ 66.939367][ T8556] ? rhashtable_walk_enter+0xf9/0x390 [ 66.947231][ T8556] rhashtable_walk_enter+0xf9/0x390 [ 66.954202][ T8556] __tipc_dump_start+0x1fa/0x3c0 [ 66.959118][ T8556] tipc_dump_start+0x70/0x90 [ 66.963682][ T8556] __netlink_dump_start+0x4f8/0x7d0 [ 66.975697][ T8556] ? __tipc_dump_start+0x3c0/0x3c0 [ 66.981198][ T8556] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 66.987265][ T8556] ? __tipc_diag_gen_cookie+0x90/0x90 [ 66.993231][ T8556] ? sock_diag_rcv+0x1c/0x40 [ 66.997815][ T8556] ? __tipc_dump_start+0x3c0/0x3c0 [ 67.002907][ T8556] ? tipc_unregister_sysctl+0x20/0x20 [ 67.008251][ T8556] ? tipc_ioctl+0x2e0/0x2e0 [ 67.012739][ T8556] sock_diag_rcv_msg+0x319/0x410 [ 67.019480][ T8556] netlink_rcv_skb+0x177/0x450 [ 67.024219][ T8556] ? sock_diag_bind+0x80/0x80 [ 67.034696][ T8556] ? netlink_ack+0xb50/0xb50 [ 67.039452][ T8556] ? kasan_check_read+0x11/0x20 [ 67.045935][ T8556] ? netlink_deliver_tap+0x254/0xbf0 [ 67.051196][ T8556] sock_diag_rcv+0x2b/0x40 [ 67.055786][ T8556] netlink_unicast+0x531/0x710 [ 67.063484][ T8556] ? netlink_attachskb+0x770/0x770 [ 67.068764][ T8556] ? _copy_from_iter_full+0x25d/0x8c0 [ 67.077114][ T8556] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 67.094402][ T8556] ? __check_object_size+0x3d/0x42f [ 67.100744][ T8556] netlink_sendmsg+0x8ae/0xd70 [ 67.109108][ T8556] ? netlink_unicast+0x710/0x710 [ 67.114360][ T8556] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 67.119884][ T8556] ? apparmor_socket_sendmsg+0x2a/0x30 [ 67.125350][ T8556] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.131578][ T8556] ? security_socket_sendmsg+0x8d/0xc0 [ 67.137119][ T8556] ? netlink_unicast+0x710/0x710 [ 67.142477][ T8556] sock_sendmsg+0xd7/0x130 [ 67.147479][ T8556] ___sys_sendmsg+0x803/0x920 [ 67.152414][ T8556] ? copy_msghdr_from_user+0x430/0x430 [ 67.157851][ T8556] ? prep_transhuge_page+0xa0/0xa0 [ 67.163117][ T8556] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.169431][ T8556] ? __handle_mm_fault+0x7cb/0x3eb0 [ 67.174756][ T8556] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.181064][ T8556] ? __fget_light+0x1a9/0x230 [ 67.186350][ T8556] ? __fdget+0x1b/0x20 [ 67.190957][ T8556] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 67.197976][ T8556] __sys_sendmsg+0x105/0x1d0 [ 67.205333][ T8556] ? __ia32_sys_shutdown+0x80/0x80 [ 67.211228][ T8556] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 67.216944][ T8556] ? do_syscall_64+0x26/0x680 [ 67.223279][ T8556] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.230290][ T8556] ? do_syscall_64+0x26/0x680 [ 67.236020][ T8556] __x64_sys_sendmsg+0x78/0xb0 [ 67.240954][ T8556] do_syscall_64+0xfd/0x680 [ 67.248304][ T8556] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 67.254346][ T8556] RIP: 0033:0x4401f9 [ 67.258641][ T8556] 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 [ 67.281823][ T8556] RSP: 002b:00007fff08c63ce8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 67.290262][ T8556] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004401f9 [ 67.298219][ T8556] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 [ 67.310031][ T8556] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 67.318340][ T8556] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a80 [ 67.326500][ T8556] R13: 0000000000401b10 R14: 0000000000000000 R15: 0000000000000000 [ 67.341659][ T8556] Kernel Offset: disabled [ 67.346862][ T8556] Rebooting in 86400 seconds..