[ 37.674372] audit: type=1800 audit(1549258910.987:25): pid=7662 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 37.694323] audit: type=1800 audit(1549258910.987:26): pid=7662 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.717318] audit: type=1800 audit(1549258910.987:27): pid=7662 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. [....] startpar: service(s) returned failure: rsyslog ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.134' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.773677] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 108.173578] [ 108.175231] ===================================== [ 108.180047] WARNING: bad unlock balance detected! [ 108.184864] 5.0.0-rc4+ #59 Not tainted [ 108.188723] ------------------------------------- [ 108.193617] syz-executor351/8290 is trying to release lock (sk_lock-AF_RXRPC) at: [ 108.201346] [] rxrpc_recvmsg+0x6d3/0x3099 [ 108.207036] but there are no more locks to release! [ 108.212024] [ 108.212024] other info that might help us debug this: [ 108.218664] 1 lock held by syz-executor351/8290: [ 108.223389] #0: 000000005fdacfdf (slock-AF_RXRPC){+...}, at: release_sock+0x20/0x1c0 [ 108.231349] [ 108.231349] stack backtrace: [ 108.235823] CPU: 0 PID: 8290 Comm: syz-executor351 Not tainted 5.0.0-rc4+ #59 [ 108.243075] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 108.252410] Call Trace: [ 108.254989] dump_stack+0x172/0x1f0 [ 108.258605] ? rxrpc_recvmsg+0x6d3/0x3099 [ 108.262743] print_unlock_imbalance_bug.cold+0x114/0x123 [ 108.268174] ? rxrpc_recvmsg+0x6d3/0x3099 [ 108.272312] lock_release+0x67e/0xa00 [ 108.276090] ? do_raw_spin_lock+0x12a/0x2e0 [ 108.280388] ? lock_downgrade+0x810/0x810 [ 108.284516] release_sock+0x183/0x1c0 [ 108.288298] rxrpc_recvmsg+0x6d3/0x3099 [ 108.292251] ? rxrpc_notify_socket+0x5e0/0x5e0 [ 108.296812] ? aa_sk_perm+0x1c6/0x7c0 [ 108.300593] ? finish_wait+0x260/0x260 [ 108.304463] ? apparmor_socket_recvmsg+0x2a/0x30 [ 108.309230] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 108.314766] ? security_socket_recvmsg+0x9b/0xd0 [ 108.319518] ? rxrpc_notify_socket+0x5e0/0x5e0 [ 108.324080] sock_recvmsg+0xd0/0x110 [ 108.327774] __sys_recvfrom+0x1ff/0x350 [ 108.331726] ? __ia32_sys_send+0x100/0x100 [ 108.335953] ? find_held_lock+0x35/0x130 [ 108.340106] ? calculate_sigpending+0x87/0xa0 [ 108.344627] ? find_held_lock+0x35/0x130 [ 108.348674] ? calculate_sigpending+0x87/0xa0 [ 108.353147] ? kasan_check_read+0x11/0x20 [ 108.357285] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 108.362023] ? do_fast_syscall_32+0xd1/0xc98 [ 108.366409] ? entry_SYSENTER_compat+0x70/0x7f [ 108.370969] __ia32_compat_sys_recvfrom+0xe5/0x1a0 [ 108.375879] do_fast_syscall_32+0x281/0xc98 [ 108.380178] entry_SYSENTER_compat+0x70/0x7f [ 108.384595] RIP: 0023:0xf7f13869 [ 108.387942] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 108.406820] RSP: 002b:00000000f7eee1dc EFLAGS: 00000292 ORIG_RAX: 0000000000000173 [ 108.414502] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000000000 executing program [ 108.421748] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 108.428991] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 108.436244] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 108.443590] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program