Re: [PATCH v2] bus: mhi: host: Add alignment check for event ring read pointer

On 10/31/2023 3:51 AM, Krishna chaitanya chundru wrote:

Though we do check the event ring read pointer by "is_valid_ring_ptr" to make sure it is in the buffer range, but there is another risk the pointer may be not aligned. Since we are expecting event ring elements are 128 bits(struct mhi_ring_element) aligned, an unaligned read pointer could lead to multiple issues like DoS or ring buffer memory corruption.

So add a alignment check for event ring read pointer.

Fixes: ec32332df764 ("bus: mhi: core: Sanity check values from remote device before use") cc: stable@vger.kernel.org Signed-off-by: Krishna chaitanya chundru quic_krichai@quicinc.com

Reviewed-by: Jeffrey Hugo quic_jhugo@quicinc.com