From: Jianglei Nie niejianglei2021@163.com
[ Upstream commit 3d950c34074ed74d2713c3856ba01264523289e6 ]
kfree_sensitive(ctx_p->user.key) will free the ctx_p->user.key. But ctx_p->user.key is still used in the next line, which will lead to a use after free.
We can call kfree_sensitive() after dev_dbg() to avoid the uaf.
Fixes: 63ee04c8b491 ("crypto: ccree - add skcipher support") Signed-off-by: Jianglei Nie niejianglei2021@163.com Signed-off-by: Herbert Xu herbert@gondor.apana.org.au Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/crypto/ccree/cc_cipher.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/ccree/cc_cipher.c b/drivers/crypto/ccree/cc_cipher.c index dafa6577a845..c289e4d5cbdc 100644 --- a/drivers/crypto/ccree/cc_cipher.c +++ b/drivers/crypto/ccree/cc_cipher.c @@ -254,8 +254,8 @@ static void cc_cipher_exit(struct crypto_tfm *tfm) &ctx_p->user.key_dma_addr);
/* Free key buffer in context */ - kfree_sensitive(ctx_p->user.key); dev_dbg(dev, "Free key buffer in context. key=@%p\n", ctx_p->user.key); + kfree_sensitive(ctx_p->user.key); }
struct tdes_keys {