From: "Duane Griffin" <duaneg@dghda.com>
To: linux-kernel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, Al Viro <viro@zeniv.linux.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Duane Griffin <duaneg@dghda.com>
Subject: [PATCH, v5] vfs: introduce helper function to safely NUL-terminate symlinks
Date: Fri, 19 Dec 2008 20:47:11 +0000 [thread overview]
Message-ID: <1229719638-6982-4-git-send-email-duaneg@dghda.com> (raw)
In-Reply-To: <1229719638-6982-3-git-send-email-duaneg@dghda.com>
A number of filesystems were potentially triggering kernel bugs due to
corrupted symlink names on disk. This function helps safely terminate
the names.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Duane Griffin <duaneg@dghda.com>
---
Unchanged from v4.
include/linux/namei.h | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 99eb803..fc2e035 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -94,4 +94,9 @@ static inline char *nd_get_link(struct nameidata *nd)
return nd->saved_names[nd->depth];
}
+static inline void nd_terminate_link(void *name, size_t len, size_t maxlen)
+{
+ ((char *) name)[min(len, maxlen)] = '\0';
+}
+
#endif /* _LINUX_NAMEI_H */
--
1.6.0.4
next prev parent reply other threads:[~2008-12-19 20:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-19 20:47 [PATCH 0/10] make link target handling more robust Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] 9p: don't print IS_ERR strings Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] eCryptfs: check readlink result was not an error before using it Duane Griffin
2008-12-19 20:47 ` Duane Griffin [this message]
2008-12-19 20:47 ` [PATCH, v5] vfs: ensure page symlinks are NUL-terminated Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] ext2: ensure fast " Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] ext3: " Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] ext4: " Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] sysv: " Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] freevxfs: " Duane Griffin
2008-12-19 20:47 ` [PATCH, v5] befs: " Duane Griffin
2008-12-22 19:58 ` [PATCH, v5] eCryptfs: check readlink result was not an error before using it Tyler Hicks
2008-12-22 20:06 ` Dustin Kirkland
2008-12-19 22:07 ` [PATCH, v5] 9p: don't print IS_ERR strings Eric Van Hensbergen
2008-12-19 22:22 ` Duane Griffin
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