linux-kernel - [PATCH] crypto: qce: fix uaf on qce_aead_register

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211104132807.19366-1-cyeaa@connect.ust.hk>
Date:   Thu,  4 Nov 2021 06:28:07 -0700
From:   Chengfeng Ye <cyeaa@...nect.ust.hk>
To:     thara.gopinath@...aro.org, herbert@...dor.apana.org.au,
        davem@...emloft.net
Cc:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Chengfeng Ye <cyeaa@...nect.ust.hk>
Subject: [PATCH] crypto: qce: fix uaf on qce_aead_register_one

Pointer alg points to sub field of tmpl, it
is dereferenced after tmpl is freed. Fix
this by accessing alg before free tmpl.

Fixes: 9363efb4 ("crypto: qce - Add support for AEAD algorithms")
Signed-off-by: Chengfeng Ye <cyeaa@...nect.ust.hk>
---
 drivers/crypto/qce/aead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/qce/aead.c b/drivers/crypto/qce/aead.c
index 290e2446a2f3..97a530171f07 100644
--- a/drivers/crypto/qce/aead.c
+++ b/drivers/crypto/qce/aead.c
@@ -802,8 +802,8 @@ static int qce_aead_register_one(const struct qce_aead_def *def, struct qce_devi
 
 	ret = crypto_register_aead(alg);
 	if (ret) {
-		kfree(tmpl);
 		dev_err(qce->dev, "%s registration failed\n", alg->base.cra_name);
+		kfree(tmpl);
 		return ret;
 	}
 
-- 
2.17.1