[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 58.069349][ T26] audit: type=1800 audit(1558409367.228:25): pid=8713 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 58.114375][ T26] audit: type=1800 audit(1558409367.228:26): pid=8713 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 58.159604][ T26] audit: type=1800 audit(1558409367.228:27): pid=8713 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 '10.128.0.236' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 71.067775][ T8865] ------------[ cut here ]------------ [ 71.073258][ T8865] DEBUG_LOCKS_WARN_ON(class_idx > MAX_LOCKDEP_KEYS) [ 71.073346][ T8865] WARNING: CPU: 0 PID: 8865 at kernel/locking/lockdep.c:3764 __lock_acquire+0x17b5/0x5490 [ 71.089769][ T8865] Kernel panic - not syncing: panic_on_warn set ... [ 71.096349][ T8865] CPU: 0 PID: 8865 Comm: syz-executor091 Not tainted 5.2.0-rc1+ #1 [ 71.104242][ T8865] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.114290][ T8865] Call Trace: [ 71.117571][ T8865] dump_stack+0x172/0x1f0 [ 71.121877][ T8865] ? __lock_acquire+0x16d0/0x5490 [ 71.126883][ T8865] panic+0x2cb/0x744 [ 71.130757][ T8865] ? __warn_printk+0xf3/0xf3 [ 71.135324][ T8865] ? __lock_acquire+0x17b5/0x5490 [ 71.140346][ T8865] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.146572][ T8865] ? __warn.cold+0x5/0x4d [ 71.150874][ T8865] ? __warn+0xe8/0x1d0 [ 71.154924][ T8865] ? __lock_acquire+0x17b5/0x5490 [ 71.159925][ T8865] __warn.cold+0x20/0x4d [ 71.164163][ T8865] ? vprintk_emit+0x1ea/0x700 [ 71.168830][ T8865] ? __lock_acquire+0x17b5/0x5490 [ 71.173828][ T8865] report_bug+0x263/0x2b0 [ 71.178148][ T8865] do_error_trap+0x11b/0x200 [ 71.182722][ T8865] do_invalid_op+0x37/0x50 [ 71.187115][ T8865] ? __lock_acquire+0x17b5/0x5490 [ 71.192114][ T8865] invalid_op+0x14/0x20 [ 71.196252][ T8865] RIP: 0010:__lock_acquire+0x17b5/0x5490 [ 71.201859][ T8865] 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 [ 71.221443][ T8865] RSP: 0018:ffff8880a4ecf3e0 EFLAGS: 00010086 [ 71.227495][ T8865] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 71.235458][ T8865] RDX: 0000000000000000 RSI: ffffffff815ac7e6 RDI: ffffed10149d9e6e [ 71.243410][ T8865] RBP: ffff8880a4ecf588 R08: ffff88808d5625c0 R09: fffffbfff11730e9 [ 71.251358][ T8865] R10: fffffbfff11730e8 R11: ffffffff88b98743 R12: 00000000bc4e486a [ 71.259309][ T8865] R13: 0000000000000000 R14: 000000000004086a R15: 0000000000000000 [ 71.267291][ T8865] ? vprintk_func+0x86/0x189 [ 71.271864][ T8865] ? sock_diag_rcv+0x2b/0x40 [ 71.276438][ T8865] ? netlink_unicast+0x531/0x710 [ 71.281349][ T8865] ? netlink_sendmsg+0x8ae/0xd70 [ 71.286262][ T8865] ? sock_sendmsg+0xd7/0x130 [ 71.290825][ T8865] ? ___sys_sendmsg+0x803/0x920 [ 71.295652][ T8865] ? __sys_sendmsg+0x105/0x1d0 [ 71.300390][ T8865] ? __x64_sys_sendmsg+0x78/0xb0 [ 71.305315][ T8865] ? do_syscall_64+0xfd/0x680 [ 71.309973][ T8865] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.316038][ T8865] ? mark_held_locks+0xf0/0xf0 [ 71.320777][ T8865] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 71.326388][ T8865] ? find_held_lock+0x35/0x130 [ 71.331126][ T8865] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 71.336735][ T8865] lock_acquire+0x16f/0x3f0 [ 71.341225][ T8865] ? rhashtable_walk_enter+0xf9/0x390 [ 71.346573][ T8865] _raw_spin_lock+0x2f/0x40 [ 71.351055][ T8865] ? rhashtable_walk_enter+0xf9/0x390 [ 71.356408][ T8865] rhashtable_walk_enter+0xf9/0x390 [ 71.361584][ T8865] __tipc_dump_start+0x1fa/0x3c0 [ 71.366496][ T8865] tipc_dump_start+0x70/0x90 [ 71.371064][ T8865] __netlink_dump_start+0x4f8/0x7d0 [ 71.376236][ T8865] ? __tipc_dump_start+0x3c0/0x3c0 [ 71.381321][ T8865] tipc_sock_diag_handler_dump+0x1d9/0x270 [ 71.387129][ T8865] ? __tipc_diag_gen_cookie+0x90/0x90 [ 71.392481][ T8865] ? sock_diag_rcv+0x1c/0x40 [ 71.397051][ T8865] ? __tipc_dump_start+0x3c0/0x3c0 [ 71.402139][ T8865] ? tipc_unregister_sysctl+0x20/0x20 [ 71.407996][ T8865] ? tipc_ioctl+0x2e0/0x2e0 [ 71.412483][ T8865] sock_diag_rcv_msg+0x319/0x410 [ 71.417403][ T8865] netlink_rcv_skb+0x177/0x450 [ 71.422144][ T8865] ? sock_diag_bind+0x80/0x80 [ 71.426816][ T8865] ? netlink_ack+0xb50/0xb50 [ 71.431381][ T8865] ? kasan_check_read+0x11/0x20 [ 71.436209][ T8865] ? netlink_deliver_tap+0x254/0xbf0 [ 71.441469][ T8865] sock_diag_rcv+0x2b/0x40 [ 71.445861][ T8865] netlink_unicast+0x531/0x710 [ 71.457754][ T8865] ? netlink_attachskb+0x770/0x770 [ 71.462843][ T8865] ? _copy_from_iter_full+0x25d/0x8c0 [ 71.468198][ T8865] ? __sanitizer_cov_trace_cmp8+0x18/0x20 [ 71.473901][ T8865] ? __check_object_size+0x3d/0x42f [ 71.479192][ T8865] netlink_sendmsg+0x8ae/0xd70 [ 71.483948][ T8865] ? netlink_unicast+0x710/0x710 [ 71.488867][ T8865] ? aa_sock_msg_perm.isra.0+0xba/0x170 [ 71.494396][ T8865] ? apparmor_socket_sendmsg+0x2a/0x30 [ 71.499831][ T8865] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.506044][ T8865] ? security_socket_sendmsg+0x8d/0xc0 [ 71.511501][ T8865] ? netlink_unicast+0x710/0x710 [ 71.516429][ T8865] sock_sendmsg+0xd7/0x130 [ 71.520818][ T8865] ___sys_sendmsg+0x803/0x920 [ 71.525496][ T8865] ? copy_msghdr_from_user+0x430/0x430 [ 71.530931][ T8865] ? prep_transhuge_page+0xa0/0xa0 [ 71.536022][ T8865] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.542337][ T8865] ? __handle_mm_fault+0x7cb/0x3eb0 [ 71.547510][ T8865] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 71.553725][ T8865] ? __fget_light+0x1a9/0x230 [ 71.558385][ T8865] ? __fdget+0x1b/0x20 [ 71.562435][ T8865] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 71.568672][ T8865] __sys_sendmsg+0x105/0x1d0 [ 71.573262][ T8865] ? __ia32_sys_shutdown+0x80/0x80 [ 71.578357][ T8865] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 71.583810][ T8865] ? do_syscall_64+0x26/0x680 [ 71.588469][ T8865] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.594513][ T8865] ? do_syscall_64+0x26/0x680 [ 71.599169][ T8865] __x64_sys_sendmsg+0x78/0xb0 [ 71.603920][ T8865] do_syscall_64+0xfd/0x680 [ 71.608403][ T8865] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 71.614277][ T8865] RIP: 0033:0x440219 [ 71.618175][ T8865] 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 [ 71.637936][ T8865] RSP: 002b:00007ffeb50f7658 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 71.646325][ T8865] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219 [ 71.654286][ T8865] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003 [ 71.662243][ T8865] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 71.670204][ T8865] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401aa0 [ 71.678150][ T8865] R13: 0000000000401b30 R14: 0000000000000000 R15: 0000000000000000 [ 71.687069][ T8865] Kernel Offset: disabled [ 71.691404][ T8865] Rebooting in 86400 seconds..