[PATCH 2/2] erofs: use kmemdup_nul in erofs_fill_symlink

[Gao Xiang]

Hi Yiyang,

On 2024/9/2 12:51, Yiyang Wu wrote:
> Remove open coding in erofs_fill_symlink.
> 
> Suggested-by: Al Viro <viro at zeniv.linux.org.uk>
> Link: https://lore.kernel.org/all/20240425222847.GN2118490@ZenIV
> Signed-off-by: Yiyang Wu <toolmanp at tlmp.cc>

Could we lift this patch as [PATCH 1/2]?

> ---
>   fs/erofs/inode.c | 11 ++++-------
>   1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
> index 90f1235dc404..f435752143cb 100644
> --- a/fs/erofs/inode.c
> +++ b/fs/erofs/inode.c
> @@ -21,23 +21,20 @@ static int erofs_fill_symlink(struct inode *inode, void *kaddr,
>   		return 0;
>   	}
>   
> -	lnk = kmalloc(inode->i_size + 1, GFP_KERNEL);
> -	if (!lnk)
> -		return -ENOMEM;
> -
>   	m_pofs += vi->xattr_isize;
> +
>   	/* inline symlink data shouldn't cross block boundary */
>   	if (m_pofs + inode->i_size > bsz) {
> -		kfree(lnk);
>   		erofs_err(inode->i_sb,
>   			  "inline data cross block boundary @ nid %llu",
>   			  vi->nid);
>   		DBG_BUGON(1);
>   		return -EFSCORRUPTED;
>   	}
> -	memcpy(lnk, kaddr + m_pofs, inode->i_size);
> -	lnk[inode->i_size] = '\0';
>   
> +	lnk = kmemdup_nul(kaddr+m_pofs, inode->i_size, GFP_KERNEL);

	lnk = kmemdup_nul(kaddr + m_pofs, inode->i_size, GFP_KERNEL);

Missing blank here.

Thanks,
Gao Xiang