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crypto: qce - fix uaf on qce_skcipher_register_one

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[ Upstream commit e9c195aaee ]

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>
This commit is contained in:
Chengfeng Ye 2021-11-04 06:46:42 -07:00 committed by Greg Kroah-Hartman
parent 561030c551
commit 38a721f609
1 changed files with 1 additions and 1 deletions
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2
drivers/crypto/qce/skcipher.c
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@ -484,8 +484,8 @@ 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;
}