crypto: talitos - fix SEC1 32k ahash request limitation

Browse source

Since commit c662b043cd ("crypto: af_alg/hash: Support
MSG_SPLICE_PAGES"), the crypto core may pass large scatterlists spanning
multiple pages to drivers supporting ahash operations. As a result, a
driver can now receive large ahash requests.

The SEC1 engine has a limitation where a single descriptor cannot
process more than 32k of data. The current implementation attempts to
handle the entire request within a single descriptor, which leads to
failures raised by the driver:

  "length exceeds h/w max limit"

Address this limitation by splitting large ahash requests into multiple
descriptors, each respecting the 32k hardware limit. This allows
processing arbitrarily large requests.

Cc: stable@vger.kernel.org
Fixes: c662b043cd ("crypto: af_alg/hash: Support MSG_SPLICE_PAGES")
Signed-off-by: Paul Louvel <paul.louvel@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

...

This commit is contained in:

Paul Louvel 2026-03-30 12:28:18 +02:00 • committed by Herbert Xu

parent 01d798e9fe

commit 655ef638a2

1 changed files with 147 additions and 69 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

310

drivers/crypto/talitos.c

View file