Re: [PATCH] crypto: vmac: fix misaligned pointer handling in vmac_update

[Herbert Xu]

On Thu, Dec 26, 2024 at 07:18:47PM +0530, Atharva Tiwari wrote:
> Handle pontential misalignment of the input pointer(p) in vmac_update
> by copying the data to a temp buffer before processing.
> 
> Signed-off-by: Atharva Tiwari <evepolonium@xxxxxxxxx>
> ---
>  crypto/vmac.c | 16 +++++++++++++---
>  1 file changed, 13 insertions(+), 3 deletions(-)
> 
> diff --git a/crypto/vmac.c b/crypto/vmac.c
> index 2ea384645ecf..8383a98ad778 100644
> --- a/crypto/vmac.c
> +++ b/crypto/vmac.c
> @@ -518,9 +518,19 @@ static int vmac_update(struct shash_desc *desc, const u8 *p, unsigned int len)
>  
>  	if (len >= VMAC_NHBYTES) {
>  		n = round_down(len, VMAC_NHBYTES);
> -		/* TODO: 'p' may be misaligned here */
> -		vhash_blocks(tctx, dctx, (const __le64 *)p, n / VMAC_NHBYTES);
> -		p += n;

Please use the get_unaligned_le64 helper instead of copying.

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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