diff options
| author | Herbert Xu <herbert@gondor.apana.org.au> | 2025-12-17 14:15:41 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-11 15:22:05 +0100 |
| commit | 0279978adec6f1296af66b642cce641c6580be46 (patch) | |
| tree | 6251e6266675f1b828a7f8b4eabb9eaf58ba3b75 /crypto | |
| parent | 18de0e41d69d97fab10b91fecf10ae78a5e43232 (diff) | |
crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
[ Upstream commit 50fdb78b7c0bcc550910ef69c0984e751cac72fa ]
As soon as crypto_aead_encrypt is called, the underlying request
may be freed by an asynchronous completion. Thus dereferencing
req->iv after it returns is invalid.
Instead of checking req->iv against info, create a new variable
unaligned_info and use it for that purpose instead.
Fixes: 0a270321dbf9 ("[CRYPTO] seqiv: Add Sequence Number IV Generator")
Reported-by: Xiumei Mu <xmu@redhat.com>
Reported-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/seqiv.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/crypto/seqiv.c b/crypto/seqiv.c index 17e11d51ddc3..04928df0095b 100644 --- a/crypto/seqiv.c +++ b/crypto/seqiv.c @@ -50,6 +50,7 @@ static int seqiv_aead_encrypt(struct aead_request *req) struct aead_geniv_ctx *ctx = crypto_aead_ctx(geniv); struct aead_request *subreq = aead_request_ctx(req); crypto_completion_t compl; + bool unaligned_info; void *data; u8 *info; unsigned int ivsize = 8; @@ -79,8 +80,9 @@ static int seqiv_aead_encrypt(struct aead_request *req) return err; } - if (unlikely(!IS_ALIGNED((unsigned long)info, - crypto_aead_alignmask(geniv) + 1))) { + unaligned_info = !IS_ALIGNED((unsigned long)info, + crypto_aead_alignmask(geniv) + 1); + if (unlikely(unaligned_info)) { info = kmemdup(req->iv, ivsize, req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC); @@ -100,7 +102,7 @@ static int seqiv_aead_encrypt(struct aead_request *req) scatterwalk_map_and_copy(info, req->dst, req->assoclen, ivsize, 1); err = crypto_aead_encrypt(subreq); - if (unlikely(info != req->iv)) + if (unlikely(unaligned_info)) seqiv_aead_encrypt_complete2(req, err); return err; } |