[ 35.744316][ T27] audit: type=1800 audit(1555319525.414:27): pid=7382 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 35.769827][ T27] audit: type=1800 audit(1555319525.414:28): pid=7382 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. [ 36.467905][ T27] audit: type=1800 audit(1555319526.214:29): pid=7382 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 [ 36.488560][ T27] audit: type=1800 audit(1555319526.214:30): pid=7382 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.178' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 60.674398][ T7535] WARNING: CPU: 0 PID: 7535 at include/linux/cpumask.h:121 io_uring_setup+0x13cd/0x1a30 [ 60.684336][ T7535] Kernel panic - not syncing: panic_on_warn set ... [ 60.690954][ T7535] CPU: 0 PID: 7535 Comm: syz-executor451 Not tainted 5.1.0-rc5 #70 [ 60.698834][ T7535] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.708886][ T7535] Call Trace: [ 60.712163][ T7535] dump_stack+0x172/0x1f0 [ 60.716472][ T7535] ? io_uring_setup+0x1390/0x1a30 [ 60.721474][ T7535] panic+0x2cb/0x65c [ 60.725347][ T7535] ? __warn_printk+0xf3/0xf3 [ 60.729923][ T7535] ? io_uring_setup+0x13cd/0x1a30 [ 60.734926][ T7535] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 60.741147][ T7535] ? __warn.cold+0x5/0x45 [ 60.745453][ T7535] ? __warn+0xe8/0x1d0 [ 60.749499][ T7535] ? io_uring_setup+0x13cd/0x1a30 [ 60.754502][ T7535] __warn.cold+0x20/0x45 [ 60.758727][ T7535] ? io_uring_setup+0x13cd/0x1a30 [ 60.763727][ T7535] report_bug+0x263/0x2b0 [ 60.768033][ T7535] do_error_trap+0x11b/0x200 [ 60.772616][ T7535] do_invalid_op+0x37/0x50 [ 60.777015][ T7535] ? io_uring_setup+0x13cd/0x1a30 [ 60.782034][ T7535] invalid_op+0x14/0x20 [ 60.786170][ T7535] RIP: 0010:io_uring_setup+0x13cd/0x1a30 [ 60.791780][ T7535] 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 [ 60.811360][ T7535] RSP: 0018:ffff8880a4e77dc0 EFLAGS: 00010293 [ 60.817402][ T7535] RAX: ffff8880926c20c0 RBX: 00000000ffffffff RCX: ffffffff81c814f7 [ 60.825350][ T7535] RDX: 0000000000000000 RSI: ffffffff81c81c3d RDI: 0000000000000005 [ 60.833298][ T7535] RBP: ffff8880a4e77ef0 R08: ffff8880926c20c0 R09: ffffed101536085c [ 60.841259][ T7535] R10: ffffed101536085b R11: ffff8880a9b042df R12: ffff88809330c940 [ 60.849212][ T7535] R13: ffff8880a4e77ec8 R14: ffff88809330c9d0 R15: ffff88809330c994 [ 60.857169][ T7535] ? io_uring_setup+0xc87/0x1a30 [ 60.862088][ T7535] ? io_uring_setup+0x13cd/0x1a30 [ 60.867093][ T7535] ? io_uring_release+0x50/0x50 [ 60.871928][ T7535] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 60.877386][ T7535] ? do_syscall_64+0x26/0x610 [ 60.882042][ T7535] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.888091][ T7535] ? do_syscall_64+0x26/0x610 [ 60.892764][ T7535] ? lockdep_hardirqs_on+0x418/0x5d0 [ 60.898049][ T7535] __x64_sys_io_uring_setup+0x54/0x80 [ 60.903399][ T7535] do_syscall_64+0x103/0x610 [ 60.907996][ T7535] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.913871][ T7535] RIP: 0033:0x440239 [ 60.917744][ T7535] 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 [ 60.937324][ T7535] RSP: 002b:00007ffdb1bc0748 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 60.945726][ T7535] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 60.953694][ T7535] RDX: 0000000000400b60 RSI: 0000000020000140 RDI: 000000000000014a [ 60.961642][ T7535] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 60.969603][ T7535] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 60.977551][ T7535] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 60.986656][ T7535] Kernel Offset: disabled [ 60.991045][ T7535] Rebooting in 86400 seconds..