This is a note to let you know that I've just added the patch titled
crypto: seqiv - Handle EBUSY correctly
to the 5.4-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-seqiv-handle-ebusy-correctly.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit da4a153d87f8db502b830d191f3414e2d3624219
Author: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Date: Fri Jan 13 18:27:51 2023 +0800
crypto: seqiv - Handle EBUSY correctly
[ Upstream commit 32e62025e5e52fbe4812ef044759de7010b15dbc ]
As it is seqiv only handles the special return value of EINPROGERSS,
which means that in all other cases it will free data related to the
request.
However, as the caller of seqiv may specify MAY_BACKLOG, we also need
to expect EBUSY and treat it in the same way. Otherwise backlogged
requests will trigger a use-after-free.
Fixes: 0a270321dbf9 ("[CRYPTO] seqiv: Add Sequence Number IV Generator")
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/crypto/seqiv.c b/crypto/seqiv.c
index 96d222c32accc..ae1d67d036259 100644
--- a/crypto/seqiv.c
+++ b/crypto/seqiv.c
@@ -25,7 +25,7 @@ static void seqiv_aead_encrypt_complete2(struct aead_request *req, int err)
struct aead_request *subreq = aead_request_ctx(req);
struct crypto_aead *geniv;
- if (err == -EINPROGRESS)
+ if (err == -EINPROGRESS || err == -EBUSY)
return;
if (err)
