Re: [PATCH v2] xfs: use kmalloc_objs() instead of kmalloc() in xfs_da_grow_inode_int

[Carlos Maiolino <cem@kernel.org>]

On Thu, Jul 16, 2026 at 03:48:12PM -0600, Cihan Karadag wrote:
> Convert open-coded kmalloc() multiplication to the modern kmalloc_objs()
> interface to improve type safety and prevent potential integer
> overflows.
> 
> No functional changes are intended.
> 
> Signed-off-by: Cihan Karadag <cihan.cihan@gmail.com>

Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>

> ---
> Changes since v1:
> - Use kmalloc_objs() instead of kmalloc_array(), per Darrick's suggestion.
> 
>  fs/xfs/libxfs/xfs_da_btree.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
> index 9debb95d86fa0..f190c088591bc 100644
> --- a/fs/xfs/libxfs/xfs_da_btree.c
> +++ b/fs/xfs/libxfs/xfs_da_btree.c
> @@ -2354,8 +2354,7 @@ xfs_da_grow_inode_int(
>  		 * If we didn't get it and the block might work if fragmented,
>  		 * try without the CONTIG flag.  Loop until we get it all.
>  		 */
> -		mapp = kmalloc(sizeof(*mapp) * count,
> -				GFP_KERNEL | __GFP_NOFAIL);
> +		mapp = kmalloc_objs(*mapp, count, GFP_KERNEL | __GFP_NOFAIL);
>  		for (b = *bno, mapi = 0; b < *bno + count; ) {
>  			c = (int)(*bno + count - b);
>  			nmap = min(XFS_BMAP_MAX_NMAP, c);
> -- 
> 2.54.0
>