Re: [PATCH] xfs_db: fix crc invalidation segfault

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On 4/20/20 2:52 PM, Anthony Iliopoulos wrote:
> The nowrite_ops var is declared within nested block scope but used
> outside that scope, causing xfs_db to crash while trying to defererence
> the verify_write pointer. Fix it by lifting the declaration to the outer
> scope, where it is accessed.
> 
> Signed-off-by: Anthony Iliopoulos <ailiop@xxxxxxxx>

Yup, thanks for spotting & fixing this.

Fixes: b64af2c "xfs_db: add crc manipulation commands"
Reviewd-by: Eric Sandeen <sandeen@xxxxxxxxxx>

> ---
>  db/crc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/db/crc.c b/db/crc.c
> index 95161c6df..b23417a11 100644
> --- a/db/crc.c
> +++ b/db/crc.c
> @@ -53,6 +53,7 @@ crc_f(
>  	char		**argv)
>  {
>  	const struct xfs_buf_ops *stashed_ops = NULL;
> +	struct xfs_buf_ops nowrite_ops;
>  	extern char	*progname;
>  	const field_t	*fields;
>  	const ftattr_t	*fa;
> @@ -127,7 +128,6 @@ crc_f(
>  	}
>  
>  	if (invalidate) {
> -		struct xfs_buf_ops nowrite_ops;
>  		flist_t		*sfl;
>  		int		bit_length;
>  		int		parentoffset;
> 



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