This is a note to let you know that I've just added the patch titled
cifs_dbg() outputs an uninitialized buffer in cifs_readdir()
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cifs_dbg-outputs-an-uninitialized-buffer-in-cifs_readdir.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 01b9b0b28626db4a47d7f48744d70abca9914ef1 Mon Sep 17 00:00:00 2001
From: Vasily Averin <vvs@xxxxxxxxxxxxx>
Date: Thu, 14 Jan 2016 13:41:14 +0300
Subject: cifs_dbg() outputs an uninitialized buffer in cifs_readdir()
From: Vasily Averin <vvs@xxxxxxxxxxxxx>
commit 01b9b0b28626db4a47d7f48744d70abca9914ef1 upstream.
In some cases tmp_bug can be not filled in cifs_filldir and stay uninitialized,
therefore its printk with "%s" modifier can leak content of kernelspace memory.
If old content of this buffer does not contain '\0' access bejond end of
allocated object can crash the host.
Signed-off-by: Vasily Averin <vvs@xxxxxxxxxxxxx>
Signed-off-by: Steve French <sfrench@localhost.localdomain>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/readdir.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -849,6 +849,7 @@ int cifs_readdir(struct file *file, stru
* if buggy server returns . and .. late do we want to
* check for that here?
*/
+ *tmp_buf = 0;
rc = cifs_filldir(current_entry, file, ctx,
tmp_buf, max_len);
if (rc) {
Patches currently in stable-queue which might be from vvs@xxxxxxxxxxxxx are
queue-3.14/cifs_dbg-outputs-an-uninitialized-buffer-in-cifs_readdir.patch
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