linux-kernel - [PATCH -next 2/7] crypto: sun8i-ss - Fix PM reference leak when pm_runtime_get

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>] [day] [month] [year] [list]

Message-ID: <20210408071832.836691-1-liushixin2@huawei.com>
Date:   Thu, 8 Apr 2021 15:18:32 +0800
From:   Shixin Liu <liushixin2@...wei.com>
To:     Corentin Labbe <clabbe.montjoie@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        "Jernej Skrabec" <jernej.skrabec@...l.net>
CC:     <linux-crypto@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-sunxi@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
        Shixin Liu <liushixin2@...wei.com>
Subject: [PATCH -next 2/7] crypto: sun8i-ss - Fix PM reference leak when pm_runtime_get_sync() fails

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
Fix it by replacing it with pm_runtime_resume_and_get to keep usage
counter balanced.

Signed-off-by: Shixin Liu <liushixin2@...wei.com>
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c | 2 +-
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index f945750b65d9..9ef1c85c4aaa 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -354,7 +354,7 @@ int sun8i_ss_cipher_init(struct crypto_tfm *tfm)
 	op->enginectx.op.prepare_request = NULL;
 	op->enginectx.op.unprepare_request = NULL;
 
-	err = pm_runtime_get_sync(op->ss->dev);
+	err = pm_runtime_resume_and_get(op->ss->dev);
 	if (err < 0) {
 		dev_err(op->ss->dev, "pm error %d\n", err);
 		goto error_pm;
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
index e0ddc684798d..80e89066dbd1 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-core.c
@@ -753,7 +753,7 @@ static int sun8i_ss_probe(struct platform_device *pdev)
 	if (err)
 		goto error_alg;
 
-	err = pm_runtime_get_sync(ss->dev);
+	err = pm_runtime_resume_and_get(ss->dev);
 	if (err < 0)
 		goto error_alg;
 
-- 
2.25.1