[ 43.645933][ T26] audit: type=1800 audit(1555327319.032:26): pid=7683 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 43.695639][ T26] audit: type=1800 audit(1555327319.072:27): pid=7683 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 43.736647][ T26] audit: type=1800 audit(1555327319.102:28): pid=7683 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. [ 45.163734][ T26] audit: type=1800 audit(1555327320.592:29): pid=7683 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.221' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.146286][ T7836] WARNING: CPU: 0 PID: 7836 at include/linux/cpumask.h:121 io_uring_setup+0x13cd/0x1a30 [ 69.156309][ T7836] Kernel panic - not syncing: panic_on_warn set ... [ 69.163314][ T7836] CPU: 0 PID: 7836 Comm: syz-executor034 Not tainted 5.1.0-rc5 #70 [ 69.171403][ T7836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.181826][ T7836] Call Trace: [ 69.185204][ T7836] dump_stack+0x172/0x1f0 [ 69.189796][ T7836] ? io_uring_setup+0x1390/0x1a30 [ 69.194962][ T7836] panic+0x2cb/0x65c [ 69.198908][ T7836] ? __warn_printk+0xf3/0xf3 [ 69.203517][ T7836] ? io_uring_setup+0x13cd/0x1a30 [ 69.208566][ T7836] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 69.214880][ T7836] ? __warn.cold+0x5/0x45 [ 69.219230][ T7836] ? __warn+0xe8/0x1d0 [ 69.223415][ T7836] ? io_uring_setup+0x13cd/0x1a30 [ 69.228540][ T7836] __warn.cold+0x20/0x45 [ 69.232927][ T7836] ? io_uring_setup+0x13cd/0x1a30 [ 69.237972][ T7836] report_bug+0x263/0x2b0 [ 69.242385][ T7836] do_error_trap+0x11b/0x200 [ 69.247206][ T7836] do_invalid_op+0x37/0x50 [ 69.251734][ T7836] ? io_uring_setup+0x13cd/0x1a30 [ 69.256826][ T7836] invalid_op+0x14/0x20 [ 69.260993][ T7836] RIP: 0010:io_uring_setup+0x13cd/0x1a30 [ 69.266979][ T7836] 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 2d 80 e0 ff e9 07 fe ff ff e8 73 70 a8 ff <0f> 0b e9 bc f8 ff ff e8 67 70 a8 ff 49 8d 84 24 88 00 00 00 48 89 [ 69.288044][ T7836] RSP: 0018:ffff888086907dc0 EFLAGS: 00010293 [ 69.294123][ T7836] RAX: ffff8880a84464c0 RBX: 00000000fffffffe RCX: ffffffff81c814f7 [ 69.302349][ T7836] RDX: 0000000000000000 RSI: ffffffff81c81c3d RDI: 0000000000000005 [ 69.310829][ T7836] RBP: ffff888086907ef0 R08: ffff8880a84464c0 R09: ffffed10117a349c [ 69.319038][ T7836] R10: ffffed10117a349b R11: ffff88808bd1a4df R12: ffff8880a882e980 [ 69.327341][ T7836] R13: ffff888086907ec8 R14: ffff8880a882ea10 R15: ffff8880a882e9d4 [ 69.335513][ T7836] ? io_uring_setup+0xc87/0x1a30 [ 69.341641][ T7836] ? io_uring_setup+0x13cd/0x1a30 [ 69.346981][ T7836] ? io_uring_release+0x50/0x50 [ 69.353429][ T7836] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 69.358906][ T7836] ? do_syscall_64+0x26/0x610 [ 69.363602][ T7836] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.369877][ T7836] ? do_syscall_64+0x26/0x610 [ 69.375716][ T7836] ? lockdep_hardirqs_on+0x418/0x5d0 [ 69.381903][ T7836] __x64_sys_io_uring_setup+0x54/0x80 [ 69.387815][ T7836] do_syscall_64+0x103/0x610 [ 69.392724][ T7836] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 69.399678][ T7836] RIP: 0033:0x440239 [ 69.403596][ T7836] 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 [ 69.431882][ T7836] RSP: 002b:00007ffd11af5e28 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 69.442095][ T7836] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 69.450577][ T7836] RDX: 0000000000400b60 RSI: 0000000020000040 RDI: 000000000000014a [ 69.458745][ T7836] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 69.466960][ T7836] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 69.475888][ T7836] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 69.486603][ T7836] Kernel Offset: disabled [ 69.491274][ T7836] Rebooting in 86400 seconds..