2023-01-13 10:34:18

by Herbert Xu

[permalink] [raw]
Subject: [PATCH] crypto: seqiv - Handle EBUSY correctly

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

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 <[email protected]>

diff --git a/crypto/seqiv.c b/crypto/seqiv.c
index 0899d527c284..b1bcfe537daf 100644
--- a/crypto/seqiv.c
+++ b/crypto/seqiv.c
@@ -23,7 +23,7 @@ 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)

if (err)
Email: Herbert Xu <[email protected]>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt