Re: [PATCH] KEYS: trusted: dcp: fix improper sg use with CONFIG_VMAP_STACK=y

On 13.11.2024, at 22:27, David Gstir david@sigma-star.at wrote:

With vmalloc stack addresses enabled (CONFIG_VMAP_STACK=y) DCP trusted keys can crash during en- and decryption of the blob encryption key via the DCP crypto driver. This is caused by improperly using sg_init_one() with vmalloc'd stack buffers (plain_key_blob).

Fix this by always using kmalloc() for buffers we give to the DCP crypto driver.

Cc: stable@vger.kernel.org # v6.10+ Fixes: 0e28bf61a5f9 ("KEYS: trusted: dcp: fix leak of blob encryption key") Signed-off-by: David Gstir david@sigma-star.at

gentle ping.

Thanks! - David