Re: [syzbot] [kernel?] general protection fault in joydev_connect

[gregkh@xxxxxxxxxxxxxxxxxxx]

On Wed, Nov 22, 2023 at 07:55:50PM +0800, xingwei lee wrote:
> Hi. I have reproduced this bug with repro.txt and repro.c below:
> 
> repro.txt
> r0 = openat$uinput(0xffffffffffffff9c, &(0x7f0000000500), 0x802, 0x0)
> ioctl$UI_DEV_SETUP(r0, 0x405c5503, &(0x7f0000000080)={{0x0, 0xffff,
> 0x3}, 'syz0\x00'})
> ioctl$UI_DEV_CREATE(r0, 0x5501) (fail_nth: 51)

You are using fault injection, which, by it's very name, causes faults :)

Can you reproduce it without causing faults in the kernel?  And if so,
can you create a patch to fix this?

thanks,

greg k-h