Re: assert failed: bp->b_vp == vp

[syzbot <syzbot+90a23d2f19e5a0a302b3%syzkaller.appspotmail.com@localhost>]

> #syz test

"Index:" does not look like a valid git repo address.

>
> Index: src/sys/uvm/uvm_swap.c
> ===================================================================
> RCS file: /home/chs/netbsd/cvs/src/sys/uvm/uvm_swap.c,v
> retrieving revision 1.206
> diff -u -p -r1.206 uvm_swap.c
> --- src/sys/uvm/uvm_swap.c	23 Aug 2021 13:08:18 -0000	1.206
> +++ src/sys/uvm/uvm_swap.c	11 Jul 2022 17:05:56 -0000
> @@ -1190,6 +1190,22 @@ again:
>   */
>  
>  /*
> + * swopen: allow the initial open from uvm_swap_init() and reject all others.
> + */
> +
> +static int
> +swopen(dev_t dev, int flag, int mode, struct lwp *l)
> +{
> +	static bool inited = false;
> +
> +	if (!inited) {
> +		inited = true;
> +		return 0;
> +	}
> +	return ENODEV;
> +}
> +
> +/*
>   * swstrategy: perform I/O on the drum
>   *
>   * => we must map the i/o request from the drum to the correct swapdev.
> @@ -1308,8 +1324,8 @@ swwrite(dev_t dev, struct uio *uio, int 
>  }
>  
>  const struct bdevsw swap_bdevsw = {
> -	.d_open = nullopen,
> -	.d_close = nullclose,
> +	.d_open = swopen,
> +	.d_close = noclose,
>  	.d_strategy = swstrategy,
>  	.d_ioctl = noioctl,
>  	.d_dump = nodump,

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