linux-kernel - [PATCH 4/4] fuse: check create mode in atomic open

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]

Date:	Tue,  7 Aug 2012 14:45:49 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	viro@...IV.linux.org.uk
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	rjones@...hat.com, steveamigauk@...oo.co.uk, mszeredi@...e.cz
Subject: [PATCH 4/4] fuse: check create mode in atomic open

From: Miklos Szeredi <mszeredi@...e.cz>

Verify that the VFS is passing us a complete create mode with the S_IFREG to
atomic open.

Reported-by: Steve <steveamigauk@...oo.co.uk>
Reported-by: Richard W.M. Jones <rjones@...hat.com>
Signed-off-by: Miklos Szeredi <mszeredi@...e.cz>
---
 fs/fuse/dir.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 8964cf3..324bc08 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -383,6 +383,9 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
 	struct fuse_entry_out outentry;
 	struct fuse_file *ff;
 
+	/* Userspace expects S_IFREG in create mode */
+	BUG_ON((mode & S_IFMT) != S_IFREG);
+
 	forget = fuse_alloc_forget();
 	err = -ENOMEM;
 	if (!forget)
-- 
1.7.7

--
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/