[PATCH 6.19 134/781] crypto: starfive - Fix memory leak in starfive_aes_aead_do_one_req()

Greg Kroah-Hartman
2026-02-25T01:29:17Z

From: Zilin Guan <zilin@seu.edu.cn>

[ Upstream commit ccb679fdae2e62ed92fd9acb25ed809c0226fcc6 ]

The starfive_aes_aead_do_one_req() function allocates rctx->adata with
kzalloc() but fails to free it if sg_copy_to_buffer() or
starfive_aes_hw_init() fails, which lead to memory leaks.

Since rctx->adata is unconditionally freed after the write_adata
operations, ensure consistent cleanup by freeing the allocation in these
earlier error paths as well.

Compile tested only. Issue found using a prototype static analysis tool
and code review.

Fixes: 7467147ef9bf ("crypto: starfive - Use dma for aes requests")
Signed-off-by: Zilin Guan <zilin@seu.edu.cn>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/crypto/starfive/jh7110-aes.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/starfive/jh7110-aes.c b/drivers/crypto/starfive/jh7110-aes.c
index 426b24889af85..01195664cc7cd 100644
--- a/drivers/crypto/starfive/jh7110-aes.c
+++ b/drivers/crypto/starfive/jh7110-aes.c
@@ -669,8 +669,10 @@ static int starfive_aes_aead_do_one_req(struct crypto_engine *engine, void *areq
return -ENOMEM;

if (sg_copy_to_buffer(req->src, sg_nents_for_len(req->src, cryp->assoclen),
- rctx->adata, cryp->assoclen) != cryp->assoclen)
+ rctx->adata, cryp->assoclen) != cryp->assoclen) {
+ kfree(rctx->adata);
return -EINVAL;
+ }
}

if (cryp->total_in)
@@ -681,8 +683,11 @@ static int starfive_aes_aead_do_one_req(struct crypto_engine *engine, void *areq
ctx->rctx = rctx;

ret = starfive_aes_hw_init(ctx);
- if (ret)
+ if (ret) {
+ if (cryp->assoclen)
+ kfree(rctx->adata);
return ret;
+ }

if (!cryp->assoclen)
goto write_text;
--
2.51.0