This is a note to let you know that I've just added the patch titled
crypto: api - Fix liveliness check in crypto_alg_tested
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-api-fix-liveliness-check-in-crypto_alg_tested.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 637c8697db2918b20ede32a0fae22690f3c30986
Author: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Sun Oct 6 09:18:37 2024 +0800
crypto: api - Fix liveliness check in crypto_alg_tested
[ Upstream commit b81e286ba154a4e0f01a94d99179a97f4ba3e396 ]
As algorithm testing is carried out without holding the main crypto
lock, it is always possible for the algorithm to go away during the
test.
So before crypto_alg_tested updates the status of the tested alg,
it checks whether it's still on the list of all algorithms. This
is inaccurate because it may be off the main list but still on the
list of algorithms to be removed.
Updating the algorithm status is safe per se as the larval still
holds a reference to it. However, killing spawns of other algorithms
that are of lower priority is clearly a deficiency as it adds
unnecessary churn.
Fix the test by checking whether the algorithm is dead.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/crypto/algapi.c b/crypto/algapi.c
index 85bc279b4233f..b3a6086042530 100644
--- a/crypto/algapi.c
+++ b/crypto/algapi.c
@@ -396,7 +396,7 @@ void crypto_alg_tested(const char *name, int err)
q->cra_flags |= CRYPTO_ALG_DEAD;
alg = test->adult;
- if (list_empty(&alg->cra_list))
+ if (crypto_is_dead(alg))
goto complete;
if (err == -ECANCELED)
