[ 38.538644][ T26] audit: type=1800 audit(1555118123.367:25): pid=7666 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.566877][ T26] audit: type=1800 audit(1555118123.367:26): pid=7666 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.603613][ T26] audit: type=1800 audit(1555118123.367:27): pid=7666 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. [....] startpar: service(s) returned failure: ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 77.728297][ T7839] WARNING: CPU: 1 PID: 7839 at include/linux/cpumask.h:121 io_uring_setup+0x13b2/0x1990 [ 77.738223][ T7839] Kernel panic - not syncing: panic_on_warn set ... [ 77.744809][ T7839] CPU: 1 PID: 7839 Comm: syz-executor332 Not tainted 5.1.0-rc4-next-20190412 #24 [ 77.754026][ T7839] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.764075][ T7839] Call Trace: [ 77.767383][ T7839] dump_stack+0x172/0x1f0 [ 77.771912][ T7839] ? io_uring_setup+0x13a0/0x1990 [ 77.776924][ T7839] panic+0x2cb/0x72b [ 77.780800][ T7839] ? __warn_printk+0xf3/0xf3 [ 77.785671][ T7839] ? io_uring_setup+0x13b2/0x1990 [ 77.790686][ T7839] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 77.796920][ T7839] ? __warn.cold+0x5/0x46 [ 77.801229][ T7839] ? __warn+0xe8/0x1d0 [ 77.805281][ T7839] ? io_uring_setup+0x13b2/0x1990 [ 77.810310][ T7839] __warn.cold+0x20/0x46 [ 77.814592][ T7839] ? io_uring_setup+0x13b2/0x1990 [ 77.819842][ T7839] report_bug+0x263/0x2b0 [ 77.824401][ T7839] do_error_trap+0x11b/0x200 [ 77.828989][ T7839] do_invalid_op+0x37/0x50 [ 77.833394][ T7839] ? io_uring_setup+0x13b2/0x1990 [ 77.838415][ T7839] invalid_op+0x14/0x20 [ 77.842562][ T7839] RIP: 0010:io_uring_setup+0x13b2/0x1990 [ 77.848248][ T7839] 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 88 60 e0 ff e9 0b fe ff ff e8 de 56 a7 ff <0f> 0b e9 db f8 ff ff e8 d2 56 a7 ff 49 8d 9c 24 88 00 00 00 48 b8 [ 77.867952][ T7839] RSP: 0018:ffff88808db77dc0 EFLAGS: 00010293 [ 77.874042][ T7839] RAX: ffff8880966ba6c0 RBX: 0000000000000400 RCX: ffffffff81c92aeb [ 77.882399][ T7839] RDX: 0000000000000000 RSI: ffffffff81c93212 RDI: 0000000000000005 [ 77.890551][ T7839] RBP: ffff88808db77ef0 R08: ffff8880966ba6c0 R09: ffffed1015104e0c [ 77.898525][ T7839] R10: ffffed1015104e0b R11: ffff8880a882705f R12: ffff888090a7aa00 [ 77.906490][ T7839] R13: ffff88808db77ec8 R14: ffff888090a7aa40 R15: ffff888090a7aa54 [ 77.914608][ T7839] ? io_uring_setup+0xc8b/0x1990 [ 77.919534][ T7839] ? io_uring_setup+0x13b2/0x1990 [ 77.924642][ T7839] ? io_uring_release+0x50/0x50 [ 77.929485][ T7839] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 77.934932][ T7839] ? do_syscall_64+0x26/0x610 [ 77.939595][ T7839] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.945650][ T7839] ? do_syscall_64+0x26/0x610 [ 77.950326][ T7839] ? lockdep_hardirqs_on+0x418/0x5d0 [ 77.955613][ T7839] __x64_sys_io_uring_setup+0x54/0x80 [ 77.960987][ T7839] do_syscall_64+0x103/0x610 [ 77.965579][ T7839] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 77.971465][ T7839] RIP: 0033:0x440239 [ 77.975381][ T7839] 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 [ 77.995598][ T7839] RSP: 002b:00007ffdae8aba38 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 78.004011][ T7839] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440239 [ 78.012067][ T7839] RDX: 0000000000400b60 RSI: 0000000020000200 RDI: 0000000000000c9f [ 78.020822][ T7839] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 78.028926][ T7839] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000401ac0 [ 78.037081][ T7839] R13: 0000000000401b50 R14: 0000000000000000 R15: 0000000000000000 [ 78.046316][ T7839] Kernel Offset: disabled [ 78.050732][ T7839] Rebooting in 86400 seconds..