| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 095/563] crypto: qce - fix uaf on qce_skcipher_register_one | Date | Mon, 24 Jan 2022 19:37:40 +0100 |
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From: Chengfeng Ye <cyeaa@connect.ust.hk>
[ Upstream commit e9c195aaeed1b45c9012adbe29dedb6031e85aa8 ]
Pointer alg points to sub field of tmpl, it is dereferenced after tmpl is freed. Fix this by accessing alg before free tmpl.
Fixes: ec8f5d8f ("crypto: qce - Qualcomm crypto engine driver") Signed-off-by: Chengfeng Ye <cyeaa@connect.ust.hk> Acked-by: Thara Gopinath <thara.gopinath@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/crypto/qce/skcipher.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c index d8053789c8828..89c7fc3efbd71 100644 --- a/drivers/crypto/qce/skcipher.c +++ b/drivers/crypto/qce/skcipher.c @@ -433,8 +433,8 @@ static int qce_skcipher_register_one(const struct qce_skcipher_def *def, ret = crypto_register_skcipher(alg); if (ret) { - kfree(tmpl); dev_err(qce->dev, "%s registration failed\n", alg->base.cra_name); + kfree(tmpl); return ret; } -- 2.34.1
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