From: "J. R. Okajima" <hooanon05@yahoo.co.jp>
To: smfrench@gmail.com, linux-cifs@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kirk w <kirkpuppy@yahoo.com>
Subject: Q: cifs, freeing volume_info->UNCip
Date: Tue, 16 Aug 2011 08:22:17 +0900 [thread overview]
Message-ID: <7087.1313450537@jrobl> (raw)
Hello,
CIFS cleanup_volume_info_contents() looks like having a memory
corruption problem.
When UNCip is set to "&vol->UNC[2]" in cifs_parse_mount_options(), it
should not be kfree()-ed in cleanup_volume_info_contents().
If it is correct and the code in mainline is not fixed yet, then here is
a patch.
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index ccc1afa..e0ea721 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -2838,7 +2838,8 @@ cleanup_volume_info_contents(struct smb_vol *volume_info)
kfree(volume_info->username);
kzfree(volume_info->password);
kfree(volume_info->UNC);
- kfree(volume_info->UNCip);
+ if (volume_info->UNCip != volume_info->UNC + 2)
+ kfree(volume_info->UNCip);
kfree(volume_info->domainname);
kfree(volume_info->iocharset);
kfree(volume_info->prepath);
J. R. Okajima
next reply other threads:[~2011-08-15 23:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-15 23:22 J. R. Okajima [this message]
2011-08-18 1:29 ` Q: cifs, freeing volume_info->UNCip Jeff Layton
2011-08-18 10:42 ` Jeff Layton
2011-08-18 16:55 ` Steve French
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