diff options
| author | Jianglei Nie <niejianglei2021@163.com> | 2022-03-03 10:23:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 14:40:02 +0200 |
| commit | c93017c8d5ebf55a4e453ac7c84cc84cf92ab570 (patch) | |
| tree | 080450c7e3e4a407183ced2ebd0fe3ed6437b0ea /drivers/crypto/ccree | |
| parent | 78622926fe01363d78b0f861bfa5c35223c0a645 (diff) | |
crypto: ccree - Fix use after free in cc_cipher_exit()
[ 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>
Diffstat (limited to 'drivers/crypto/ccree')
| -rw-r--r-- | drivers/crypto/ccree/cc_cipher.c | 2 |
1 files changed, 1 insertions, 1 deletions
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 { |