linux-kernel - [PATCH-next] fs/cifs: Fix resource leak

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]

Date:   Tue,  4 May 2021 13:43:43 +0100
From:   Khaled ROMDHANI <khaledromdhani216@...il.com>
To:     sfrench@...ba.org
Cc:     Khaled ROMDHANI <khaledromdhani216@...il.com>,
        linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH-next] fs/cifs: Fix resource leak

The -EIO error return path is leaking memory allocated
to page. Fix this by invoking the free_dentry_path before
the return.

Addresses-Coverity: ("Resource leak")
Signed-off-by: Khaled ROMDHANI <khaledromdhani216@...il.com>
---
 fs/cifs/link.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 1cbe7ec73728..1485c6095ba1 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -686,8 +686,10 @@ cifs_symlink(struct user_namespace *mnt_userns, struct inode *inode,
 	void *page = alloc_dentry_path();
 	struct inode *newinode = NULL;
 
-	if (unlikely(cifs_forced_shutdown(cifs_sb)))
+	if (unlikely(cifs_forced_shutdown(cifs_sb))) {
+		free_dentry_path(page);
 		return -EIO;
+	}
 
 	xid = get_xid();
 
-- 
2.17.1