linux-kernel - [PATCH 5/5] crypto: hisilicon/qm - set NULL to qm->debug.qm_diff

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

Message-ID: <20250913105754.3862444-6-huangchenghai2@huawei.com>
Date: Sat, 13 Sep 2025 18:57:54 +0800
From: Chenghai Huang <huangchenghai2@...wei.com>
To: <herbert@...dor.apana.org.au>, <davem@...emloft.net>
CC: <linux-kernel@...r.kernel.org>, <linux-crypto@...r.kernel.org>,
	<linuxarm@...neuler.org>, <fanghao11@...wei.com>, <liulongfang@...wei.com>,
	<qianweili@...wei.com>, <wangzhou1@...ilicon.com>
Subject: [PATCH 5/5] crypto: hisilicon/qm - set NULL to qm->debug.qm_diff_regs

When the initialization of qm->debug.acc_diff_reg fails,
the probe process does not exit. However, after qm->debug.qm_diff_regs is
freed, it is not set to NULL. This can lead to a double free when the
remove process attempts to free it again. Therefore, qm->debug.qm_diff_regs
should be set to NULL after it is freed.

Fixes: 8be091338971 ("crypto: hisilicon/debugfs - Fix debugfs uninit process issue")
Signed-off-by: Chenghai Huang <huangchenghai2@...wei.com>
---
 drivers/crypto/hisilicon/debugfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/hisilicon/debugfs.c b/drivers/crypto/hisilicon/debugfs.c
index 45e130b901eb..17eb236e9ee4 100644
--- a/drivers/crypto/hisilicon/debugfs.c
+++ b/drivers/crypto/hisilicon/debugfs.c
@@ -888,6 +888,7 @@ static int qm_diff_regs_init(struct hisi_qm *qm,
 		dfx_regs_uninit(qm, qm->debug.qm_diff_regs, ARRAY_SIZE(qm_diff_regs));
 		ret = PTR_ERR(qm->debug.acc_diff_regs);
 		qm->debug.acc_diff_regs = NULL;
+		qm->debug.qm_diff_regs = NULL;
 		return ret;
 	}
 
-- 
2.43.0