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. [....] startpar: service(s) returned failure: rsyslog ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 47.426585][ T26] kauditd_printk_skb: 3 callbacks suppressed [ 47.426601][ T26] audit: type=1400 audit(1555807378.837:35): avc: denied { map } for pid=8119 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 '10.128.1.59' (ECDSA) to the list of known hosts. executing program [ 68.434673][ T26] audit: type=1400 audit(1555807399.837:36): avc: denied { map } for pid=8131 comm="syz-executor806" path="/root/syz-executor806000012" dev="sda1" ino=15902 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 [ 69.425812][ T8148] ------------[ cut here ]------------ [ 69.431518][ T8148] percpu_ref_kill_and_confirm called more than once on io_ring_ctx_ref_free! [ 69.431747][ T8148] WARNING: CPU: 0 PID: 8148 at lib/percpu-refcount.c:335 percpu_ref_kill_and_confirm+0x341/0x3b0 [ 69.451019][ T8148] Kernel panic - not syncing: panic_on_warn set ... [ 69.457673][ T8148] CPU: 0 PID: 8148 Comm: syz-executor806 Not tainted 5.1.0-rc5+ #77 [ 69.465722][ T8148] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.475824][ T8148] Call Trace: [ 69.479132][ T8148] dump_stack+0x172/0x1f0 [ 69.483496][ T8148] ? percpu_ref_kill_and_confirm+0x340/0x3b0 [ 69.489532][ T8148] panic+0x2cb/0x65c [ 69.493426][ T8148] ? __warn_printk+0xf3/0xf3 [ 69.498008][ T8148] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 69.503988][ T8148] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.510231][ T8148] ? __warn.cold+0x5/0x45 [ 69.514672][ T8148] ? __warn+0xe8/0x1d0 [ 69.518738][ T8148] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 69.524717][ T8148] __warn.cold+0x20/0x45 [ 69.528955][ T8148] ? vprintk_emit+0x1ce/0x6d0 [ 69.533643][ T8148] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 69.539645][ T8148] report_bug+0x263/0x2b0 [ 69.544045][ T8148] do_error_trap+0x11b/0x200 [ 69.548665][ T8148] do_invalid_op+0x37/0x50 [ 69.553133][ T8148] ? percpu_ref_kill_and_confirm+0x341/0x3b0 [ 69.559118][ T8148] invalid_op+0x14/0x20 [ 69.563276][ T8148] RIP: 0010:percpu_ref_kill_and_confirm+0x341/0x3b0 [ 69.569905][ T8148] Code: 42 e0 2a 06 01 48 89 fa 48 c1 ea 03 80 3c 02 00 75 76 49 8b 54 24 10 48 c7 c6 a0 71 a1 87 48 c7 c7 40 71 a1 87 e8 ad 92 13 fe <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 80 3c 02 [ 69.589601][ T8148] RSP: 0018:ffff888091697cf0 EFLAGS: 00010082 [ 69.595678][ T8148] RAX: 0000000000000000 RBX: 0000607f5142f8b3 RCX: 0000000000000000 [ 69.603754][ T8148] RDX: 0000000000000000 RSI: ffffffff815afcf6 RDI: ffffed10122d2f90 [ 69.611727][ T8148] RBP: ffff888091697d20 R08: ffff8880946aa240 R09: fffffbfff1133639 [ 69.619739][ T8148] R10: fffffbfff1133638 R11: ffffffff8899b1c3 R12: ffff88808e9781c0 [ 69.627705][ T8148] R13: ffff88808e9781c8 R14: 0000000000000286 R15: 0000000000000000 [ 69.635778][ T8148] ? vprintk_func+0x86/0x189 [ 69.640407][ T8148] __io_uring_register+0xa7/0x1fe0 [ 69.645525][ T8148] ? __mutex_lock+0x3cd/0x1310 [ 69.650275][ T8148] ? __x64_sys_io_uring_register+0x182/0x1f0 [ 69.656253][ T8148] ? mutex_trylock+0x1e0/0x1e0 [ 69.661050][ T8148] ? io_sq_wq_submit_work+0x10f0/0x10f0 [ 69.666597][ T8148] ? kasan_check_write+0x14/0x20 [ 69.671539][ T8148] __x64_sys_io_uring_register+0x193/0x1f0 [ 69.677393][ T8148] do_syscall_64+0x103/0x610 [ 69.682033][ T8148] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.687920][ T8148] RIP: 0033:0x4467c9 [ 69.691799][ T8148] Code: e8 5c 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 0b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 69.711402][ T8148] RSP: 002b:00007fea25277db8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab [ 69.719861][ T8148] RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004467c9 [ 69.727904][ T8148] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000003 [ 69.736007][ T8148] RBP: 00000000006dbc30 R08: 00007fea25278700 R09: 0000000000000000 [ 69.743979][ T8148] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c [ 69.751956][ T8148] R13: 00007fff13628d8f R14: 00007fea252789c0 R15: 20c49ba5e353f7cf [ 69.760919][ T8148] Kernel Offset: disabled [ 69.765352][ T8148] Rebooting in 86400 seconds..