[ 38.937229][ T26] audit: type=1800 audit(1555328297.005:25): pid=7597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.975271][ T26] audit: type=1800 audit(1555328297.005:26): pid=7597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.005579][ T26] audit: type=1800 audit(1555328297.015:27): pid=7597 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 39.030962][ T26] audit: type=1800 audit(1555328297.015:28): pid=7597 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 '10.128.0.159' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 75.241572][ T7748] WARNING: CPU: 0 PID: 7748 at include/linux/cpumask.h:121 io_uring_setup+0x13cd/0x1a30 [ 75.251318][ T7748] Kernel panic - not syncing: panic_on_warn set ... [ 75.257889][ T7748] CPU: 0 PID: 7748 Comm: syz-executor865 Not tainted 5.1.0-rc5 #68 [ 75.265753][ T7748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.275789][ T7748] Call Trace: [ 75.279131][ T7748] dump_stack+0x172/0x1f0 [ 75.283497][ T7748] ? io_uring_setup+0x1390/0x1a30 [ 75.288598][ T7748] panic+0x2cb/0x65c [ 75.292489][ T7748] ? __warn_printk+0xf3/0xf3 [ 75.297068][ T7748] ? io_uring_setup+0x13cd/0x1a30 [ 75.302078][ T7748] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 75.308315][ T7748] ? __warn.cold+0x5/0x45 [ 75.312622][ T7748] ? __warn+0xe8/0x1d0 [ 75.316671][ T7748] ? io_uring_setup+0x13cd/0x1a30 [ 75.321674][ T7748] __warn.cold+0x20/0x45 [ 75.325900][ T7748] ? io_uring_setup+0x13cd/0x1a30 [ 75.330905][ T7748] report_bug+0x263/0x2b0 [ 75.335281][ T7748] do_error_trap+0x11b/0x200 [ 75.339916][ T7748] do_invalid_op+0x37/0x50 [ 75.344329][ T7748] ? io_uring_setup+0x13cd/0x1a30 [ 75.349349][ T7748] invalid_op+0x14/0x20 [ 75.353486][ T7748] RIP: 0010:io_uring_setup+0x13cd/0x1a30 [ 75.359102][ T7748] 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 [ 75.378760][ T7748] RSP: 0018:ffff8880984d7dc0 EFLAGS: 00010293 [ 75.384921][ T7748] RAX: ffff88808c2fc2c0 RBX: 00000000fffffffe RCX: ffffffff81c814f7 [ 75.392878][ T7748] RDX: 0000000000000000 RSI: ffffffff81c81c3d RDI: 0000000000000005 [ 75.400935][ T7748] RBP: ffff8880984d7ef0 R08: ffff88808c2fc2c0 R09: ffffed1012d618bc [ 75.408893][ T7748] R10: ffffed1012d618bb R11: ffff888096b0c5df R12: ffff88809450c180 [ 75.416853][ T7748] R13: ffff8880984d7ec8 R14: ffff88809450c210 R15: ffff88809450c1d4 [ 75.424821][ T7748] ? io_uring_setup+0xc87/0x1a30 [ 75.429750][ T7748] ? io_uring_setup+0x13cd/0x1a30 [ 75.434757][ T7748] ? io_uring_release+0x50/0x50 [ 75.439592][ T7748] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 75.445030][ T7748] ? do_syscall_64+0x26/0x610 [ 75.449696][ T7748] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.455768][ T7748] ? do_syscall_64+0x26/0x610 [ 75.460435][ T7748] ? lockdep_hardirqs_on+0x418/0x5d0 [ 75.465713][ T7748] __x64_sys_io_uring_setup+0x54/0x80 [ 75.471122][ T7748] do_syscall_64+0x103/0x610 [ 75.475704][ T7748] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 75.481573][ T7748] RIP: 0033:0x440239 [ 75.485448][ T7748] 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 [ 75.505035][ T7748] RSP: 002b:00007ffe83e54d28 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 75.513424][ T7748] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 75.521377][ T7748] RDX: 0000000000400b60 RSI: 0000000020000040 RDI: 000000000000014a [ 75.529387][ T7748] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 75.537460][ T7748] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 75.545414][ T7748] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 75.553971][ T7748] Kernel Offset: disabled [ 75.558351][ T7748] Rebooting in 86400 seconds..