From: Herbert Xu <herbert@gondor.apana.org.au> stable inclusion from stable-v5.10.254 commit 88881da57e60ef796c59bf53bb34221c960ec707 category: bugfix bugzilla: https://atomgit.com/src-openeuler/kernel/issues/14174 CVE: CVE-2026-31431 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 1f48ad3b19a9dfc947868edda0bb8e48e5b5a8fa upstream. The src SG list offset wasn't set properly when decrypting in-place, fix it. Reported-by: Wolfgang Walter <linux@stwm.de> Fixes: e02494114ebf ("crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption") Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Eric Biggers <ebiggers@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: GONG Ruiqi <gongruiqi1@huawei.com> --- crypto/authencesn.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/crypto/authencesn.c b/crypto/authencesn.c index d88e72b21b79..f6ffa16a74ef 100644 --- a/crypto/authencesn.c +++ b/crypto/authencesn.c @@ -247,9 +247,11 @@ static int crypto_authenc_esn_decrypt_tail(struct aead_request *req, decrypt: - if (src != dst) - src = scatterwalk_ffwd(areq_ctx->src, src, assoclen); dst = scatterwalk_ffwd(areq_ctx->dst, dst, assoclen); + if (req->src == req->dst) + src = dst; + else + src = scatterwalk_ffwd(areq_ctx->src, src, assoclen); skcipher_request_set_tfm(skreq, ctx->enc); skcipher_request_set_callback(skreq, flags, -- 2.43.0