linux-kernel - [PATCH] vdpa_sim_blk: Fix the potential leak of mgmt

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: <20230821021835.1134-1-shawn.shao@jaguarmicro.com>
Date:   Mon, 21 Aug 2023 10:18:35 +0800
From:   "Shawn.Shao" <shawn.shao@...uarmicro.com>
To:     mst@...hat.com, jasowang@...hat.com, xuanzhuo@...ux.alibaba.com,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Cc:     lege.wang@...uarmicro.com,
        "Shawn.Shao" <shawn.shao@...uarmicro.com>
Subject: [PATCH] vdpa_sim_blk: Fix the potential leak of mgmt_dev

If the shared_buffer allocation fails, need to unregister mgmt_dev first.

Signed-off-by: Shawn.Shao <shawn.shao@...uarmicro.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim_blk.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
index 00d7d72713be..b3a3cb165795 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim_blk.c
@@ -499,12 +499,13 @@ static int __init vdpasim_blk_init(void)
 					 GFP_KERNEL);
 		if (!shared_buffer) {
 			ret = -ENOMEM;
-			goto parent_err;
+			goto mgmt_dev_err;
 		}
 	}
 
 	return 0;
-
+mgmt_dev_err:
+	vdpa_mgmtdev_unregister(&mgmt_dev);
 parent_err:
 	device_unregister(&vdpasim_blk_mgmtdev);
 	return ret;
-- 
2.34.1