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| author | Jianglei Nie <niejianglei2021@163.com> | 2022-03-03 05:23:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:23:09 +0300 |
| commit | 335bf1fc74f775a8255257aa3e33763f2257b676 (patch) | |
| tree | a4c718f2533a0f3a5165be9d56dba69e5267cf55 /drivers/crypto | |
| parent | 20550eb187e83453c68a3de80844f94955355309 (diff) | |
| download | linux-335bf1fc74f775a8255257aa3e33763f2257b676.tar.xz | |
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')
| -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 78833491f534..309da6334a0a 100644 --- a/drivers/crypto/ccree/cc_cipher.c +++ b/drivers/crypto/ccree/cc_cipher.c @@ -257,8 +257,8 @@ 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 { |