linux-kernel - [PATCH v1 3/5] dmaengine: idxd: fix memory leak in error handling path of idxd_setup

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: <20250110082237.21135-4-xueshuai@linux.alibaba.com>
Date: Fri, 10 Jan 2025 16:22:35 +0800
From: Shuai Xue <xueshuai@...ux.alibaba.com>
To: fenghua.yu@...el.com,
	dave.jiang@...el.com,
	vkoul@...nel.org
Cc: xueshuai@...ux.alibaba.com,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1 3/5] dmaengine: idxd: fix memory leak in error handling path of idxd_setup_groups

Memory allocated for groups is not freed if an error occurs during
idxd_setup_groups(). To fix it, free the allocated memory in the reverse
order of allocation before exiting the function in case of an error.

Signed-off-by: Shuai Xue <xueshuai@...ux.alibaba.com>
---
 drivers/dma/idxd/init.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 12df895dcbe9..04a7d7706e53 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -326,6 +326,7 @@ static int idxd_setup_groups(struct idxd_device *idxd)
 		rc = dev_set_name(conf_dev, "group%d.%d", idxd->id, group->id);
 		if (rc < 0) {
 			put_device(conf_dev);
+			kfree(group);
 			goto err;
 		}
 
@@ -350,7 +351,10 @@ static int idxd_setup_groups(struct idxd_device *idxd)
 	while (--i >= 0) {
 		group = idxd->groups[i];
 		put_device(group_confdev(group));
+		kfree(group);
 	}
+	kfree(idxd->groups);
+
 	return rc;
 }
 
-- 
2.39.3