Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 39.776203] audit: type=1800 audit(1549260565.598:33): pid=7534 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 39.797649] audit: type=1800 audit(1549260565.598:34): pid=7534 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 44.687425] audit: type=1400 audit(1549260570.508:35): avc: denied { map } for pid=7707 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.110' (ECDSA) to the list of known hosts. executing program [ 86.128608] audit: type=1400 audit(1549260611.948:36): avc: denied { map } for pid=7719 comm="syz-executor942" path="/root/syz-executor942760922" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 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 [ 93.155834] [ 93.157571] ===================================== [ 93.162384] WARNING: bad unlock balance detected! [ 93.167221] 5.0.0-rc4+ #59 Not tainted [ 93.171100] ------------------------------------- [ 93.175924] syz-executor942/7854 is trying to release lock (sk_lock-AF_RXRPC) at: [ 93.183533] [] rxrpc_recvmsg+0x6d3/0x3099 [ 93.189213] but there are no more locks to release! [ 93.194204] [ 93.194204] other info that might help us debug this: [ 93.200849] 1 lock held by syz-executor942/7854: [ 93.205581] #0: 00000000bf19f417 (slock-AF_RXRPC){+...}, at: release_sock+0x20/0x1c0 [ 93.213663] [ 93.213663] stack backtrace: [ 93.218134] CPU: 0 PID: 7854 Comm: syz-executor942 Not tainted 5.0.0-rc4+ #59 [ 93.225521] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.234854] Call Trace: [ 93.237441] dump_stack+0x172/0x1f0 [ 93.241042] ? rxrpc_recvmsg+0x6d3/0x3099 [ 93.245167] print_unlock_imbalance_bug.cold+0x114/0x123 [ 93.250719] ? rxrpc_recvmsg+0x6d3/0x3099 [ 93.254975] lock_release+0x67e/0xa00 [ 93.258945] ? do_raw_spin_lock+0x20e/0x2e0 [ 93.263242] ? lock_downgrade+0x810/0x810 [ 93.267363] release_sock+0x183/0x1c0 [ 93.271134] rxrpc_recvmsg+0x6d3/0x3099 [ 93.275084] ? rxrpc_notify_socket+0x5e0/0x5e0 [ 93.279646] ? iterate_fd+0x360/0x360 [ 93.283423] ? finish_wait+0x260/0x260 [ 93.287283] ? selinux_socket_recvmsg+0x36/0x40 [ 93.291922] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 93.297439] ? security_socket_recvmsg+0x9b/0xd0 [ 93.302297] ? rxrpc_notify_socket+0x5e0/0x5e0 [ 93.306861] sock_recvmsg+0xd0/0x110 [ 93.310551] __sys_recvfrom+0x1ff/0x350 [ 93.314500] ? __ia32_sys_send+0x100/0x100 [ 93.318707] ? mark_held_locks+0x100/0x100 [ 93.323060] ? calculate_sigpending+0x87/0xa0 [ 93.327528] ? find_held_lock+0x35/0x130 [ 93.331558] ? calculate_sigpending+0x87/0xa0 [ 93.336164] ? kasan_check_read+0x11/0x20 [ 93.340288] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 93.345152] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 93.350063] ? do_syscall_64+0x26/0x610 [ 93.354016] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.359354] __x64_sys_recvfrom+0xe1/0x1a0 [ 93.363777] do_syscall_64+0x103/0x610 [ 93.367640] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 93.372803] RIP: 0033:0x446399 [ 93.375970] Code: e8 2c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 93.394851] RSP: 002b:00007f02d1ec5d98 EFLAGS: 00000246 ORIG_RAX: 000000000000002d executing program [ 93.402626] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446399 [ 93.410026] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [ 93.417359] RBP: 00000000006dbc30 R08: 0000000000000000 R09: 0000000000000000 [ 93.424604] R10: 0000000000000002 R11: 0000000000000246 R12: 00000000006dbc3c [ 93.432124] R13: 0000000000000000 R14: 0000000000000000 R15: 20c49ba5e353f7cf 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