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: <20091217004707.472856791@mini.kroah.org>
Date:	Wed, 16 Dec 2009 16:45:55 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Csaba Henk <csaba@...ster.com>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Harshavardhana <harsha@...ster.com>
Subject: [04/18] fuse: reject O_DIRECT flag also in fuse_create

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Csaba Henk <csaba@...ster.com>

commit 1b7323965a8c6eee9dc4e345a7ae4bff1dc93149 upstream.

The comment in fuse_open about O_DIRECT:

  "VFS checks this, but only _after_ ->open()"

also holds for fuse_create, however, the same kind of check was missing there.

As an impact of this bug, open(newfile, O_RDWR|O_CREAT|O_DIRECT) fails, but a
stub newfile will remain if the fuse server handled the implied FUSE_CREATE
request appropriately.

Other impact: in the above situation ima_file_free() will complain to open/free
imbalance if CONFIG_IMA is set.

Signed-off-by: Csaba Henk <csaba@...ster.com>
Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
Cc: Harshavardhana <harsha@...ster.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 fs/fuse/dir.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -401,6 +401,9 @@ static int fuse_create_open(struct inode
 	if (flags & O_DIRECT)
 		return -EINVAL;
 
+	if (flags & O_DIRECT)
+		return -EINVAL;
+
 	forget_req = fuse_get_req(fc);
 	if (IS_ERR(forget_req))
 		return PTR_ERR(forget_req);


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ