[ 39.285302][ T26] audit: type=1800 audit(1555122373.950:25): pid=7712 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 39.323093][ T26] audit: type=1800 audit(1555122373.950:26): pid=7712 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 39.350962][ T26] audit: type=1800 audit(1555122373.950:27): pid=7712 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 39.370842][ T26] audit: type=1800 audit(1555122373.960:28): pid=7712 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.198' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 65.498222][ T7863] WARNING: CPU: 0 PID: 7863 at include/linux/cpumask.h:121 io_uring_setup+0x13b2/0x1990 [ 65.507954][ T7863] Kernel panic - not syncing: panic_on_warn set ... [ 65.514539][ T7863] CPU: 0 PID: 7863 Comm: syz-executor130 Not tainted 5.1.0-rc4+ #65 [ 65.522512][ T7863] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.532559][ T7863] Call Trace: [ 65.535886][ T7863] dump_stack+0x172/0x1f0 [ 65.540328][ T7863] ? io_uring_setup+0x12e0/0x1990 [ 65.545383][ T7863] panic+0x2cb/0x65c [ 65.549274][ T7863] ? __warn_printk+0xf3/0xf3 [ 65.553846][ T7863] ? io_uring_setup+0x13b2/0x1990 [ 65.558850][ T7863] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 65.565075][ T7863] ? __warn.cold+0x5/0x45 [ 65.569385][ T7863] ? __warn+0xe8/0x1d0 [ 65.573435][ T7863] ? io_uring_setup+0x13b2/0x1990 [ 65.578446][ T7863] __warn.cold+0x20/0x45 [ 65.582675][ T7863] ? io_uring_setup+0x13b2/0x1990 [ 65.587688][ T7863] report_bug+0x263/0x2b0 [ 65.592001][ T7863] do_error_trap+0x11b/0x200 [ 65.596643][ T7863] do_invalid_op+0x37/0x50 [ 65.601047][ T7863] ? io_uring_setup+0x13b2/0x1990 [ 65.606056][ T7863] invalid_op+0x14/0x20 [ 65.610198][ T7863] RIP: 0010:io_uring_setup+0x13b2/0x1990 [ 65.615816][ T7863] Code: 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 80 3c 02 00 0f 84 18 fe ff ff 48 89 df e8 e8 80 e0 ff e9 0b fe ff ff e8 2e 79 a8 ff <0f> 0b e9 db f8 ff ff e8 22 79 a8 ff 49 8d 9c 24 88 00 00 00 48 b8 [ 65.635493][ T7863] RSP: 0018:ffff88808ea37dc0 EFLAGS: 00010293 [ 65.641546][ T7863] RAX: ffff8880a4148300 RBX: 0000000000000406 RCX: ffffffff81c80eab [ 65.649605][ T7863] RDX: 0000000000000000 RSI: ffffffff81c815d2 RDI: 0000000000000005 [ 65.657606][ T7863] RBP: ffff88808ea37ef0 R08: ffff8880a4148300 R09: ffffed1010825cdc [ 65.665574][ T7863] R10: ffffed1010825cdb R11: ffff88808412e6df R12: ffff888084287640 [ 65.673522][ T7863] R13: ffff88808ea37ec8 R14: ffff888084287680 R15: ffff888084287694 [ 65.681604][ T7863] ? io_uring_setup+0xc8b/0x1990 [ 65.686524][ T7863] ? io_uring_setup+0x13b2/0x1990 [ 65.691531][ T7863] ? io_uring_release+0x50/0x50 [ 65.696374][ T7863] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 65.701871][ T7863] ? do_syscall_64+0x26/0x610 [ 65.706533][ T7863] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.712583][ T7863] ? do_syscall_64+0x26/0x610 [ 65.717302][ T7863] ? lockdep_hardirqs_on+0x418/0x5d0 [ 65.722581][ T7863] __x64_sys_io_uring_setup+0x54/0x80 [ 65.727941][ T7863] do_syscall_64+0x103/0x610 [ 65.732569][ T7863] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.738446][ T7863] RIP: 0033:0x440239 [ 65.742328][ T7863] 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 [ 65.761920][ T7863] RSP: 002b:00007ffd845e1358 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 65.770312][ T7863] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 65.778270][ T7863] RDX: 0000000000400b60 RSI: 0000000020000140 RDI: 000000000000089e [ 65.786225][ T7863] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 65.794178][ T7863] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 65.802129][ T7863] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 65.810860][ T7863] Kernel Offset: disabled [ 65.815279][ T7863] Rebooting in 86400 seconds..