[ 43.808745][ T27] audit: type=1800 audit(1555329667.553:25): pid=7628 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 43.840714][ T27] audit: type=1800 audit(1555329667.553:26): pid=7628 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.875447][ T27] audit: type=1800 audit(1555329667.553:27): pid=7628 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 43.902893][ T27] audit: type=1800 audit(1555329667.553:28): pid=7628 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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 '10.128.0.170' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.557396][ T7781] WARNING: CPU: 0 PID: 7781 at include/linux/cpumask.h:121 io_uring_setup+0x13cd/0x1a30 [ 54.567244][ T7781] Kernel panic - not syncing: panic_on_warn set ... [ 54.573823][ T7781] CPU: 0 PID: 7781 Comm: syz-executor265 Not tainted 5.1.0-rc4-next-20190415 #25 [ 54.582916][ T7781] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.592990][ T7781] Call Trace: [ 54.596315][ T7781] dump_stack+0x172/0x1f0 [ 54.600638][ T7781] ? io_uring_setup+0x1310/0x1a30 [ 54.605669][ T7781] panic+0x2cb/0x72b [ 54.609552][ T7781] ? __warn_printk+0xf3/0xf3 [ 54.614144][ T7781] ? io_uring_setup+0x13cd/0x1a30 [ 54.619225][ T7781] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 54.626272][ T7781] ? __warn.cold+0x5/0x46 [ 54.631324][ T7781] ? __warn+0xe8/0x1d0 [ 54.635398][ T7781] ? io_uring_setup+0x13cd/0x1a30 [ 54.640444][ T7781] __warn.cold+0x20/0x46 [ 54.644685][ T7781] ? io_uring_setup+0x13cd/0x1a30 [ 54.649723][ T7781] report_bug+0x263/0x2b0 [ 54.654073][ T7781] do_error_trap+0x11b/0x200 [ 54.658660][ T7781] do_invalid_op+0x37/0x50 [ 54.663065][ T7781] ? io_uring_setup+0x13cd/0x1a30 [ 54.668220][ T7781] invalid_op+0x14/0x20 [ 54.672394][ T7781] RIP: 0010:io_uring_setup+0x13cd/0x1a30 [ 54.678088][ T7781] Code: 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 84 18 fe ff ff 48 8b bd e8 fe ff ff e8 8d 62 e0 ff e9 07 fe ff ff e8 d3 36 a7 ff <0f> 0b e9 bc f8 ff ff e8 c7 36 a7 ff 49 8d 84 24 88 00 00 00 48 89 [ 54.697704][ T7781] RSP: 0018:ffff8880989b7dc0 EFLAGS: 00010293 [ 54.703764][ T7781] RAX: ffff8880a5918200 RBX: 00000000fffffffe RCX: ffffffff81c94a77 [ 54.711731][ T7781] RDX: 0000000000000000 RSI: ffffffff81c951bd RDI: 0000000000000005 [ 54.719694][ T7781] RBP: ffff8880989b7ef0 R08: ffff8880a5918200 R09: ffffed101535dd1c [ 54.727655][ T7781] R10: ffffed101535dd1b R11: ffff8880a9aee8df R12: ffff88808d29e980 [ 54.735633][ T7781] R13: ffff8880989b7ec8 R14: ffff88808d29ea10 R15: ffff88808d29e9d4 [ 54.743614][ T7781] ? io_uring_setup+0xc87/0x1a30 [ 54.748553][ T7781] ? io_uring_setup+0x13cd/0x1a30 [ 54.753576][ T7781] ? io_uring_release+0x50/0x50 [ 54.758441][ T7781] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 54.764001][ T7781] ? do_syscall_64+0x26/0x610 [ 54.768881][ T7781] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.774971][ T7781] ? do_syscall_64+0x26/0x610 [ 54.779659][ T7781] ? lockdep_hardirqs_on+0x418/0x5d0 [ 54.784964][ T7781] __x64_sys_io_uring_setup+0x54/0x80 [ 54.790368][ T7781] do_syscall_64+0x103/0x610 [ 54.794960][ T7781] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.800846][ T7781] RIP: 0033:0x440239 [ 54.804728][ T7781] 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 [ 54.824457][ T7781] RSP: 002b:00007ffe249040b8 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 54.832868][ T7781] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 54.840841][ T7781] RDX: 0000000000400b60 RSI: 0000000020000040 RDI: 000000000000014a [ 54.851475][ T7781] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 54.859452][ T7781] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 54.867418][ T7781] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 54.876617][ T7781] Kernel Offset: disabled [ 54.881073][ T7781] Rebooting in 86400 seconds..