| Message ID | 1454508110-30770-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index b334a89d6a66..1320d1ecc630 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -849,6 +849,7 @@ int cifs_readdir(struct file *file, struct dir_context *ctx) * 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) {
This is a note to let you know that I have just added a patch titled cifs_dbg() outputs an uninitialized buffer in cifs_readdir() to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.16.y-queue This patch is scheduled to be released in version 3.16.7-ckt24. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.16.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ---8<------------------------------------------------------------ From c9c482ef696a6eefe7f8d25e140593441f948cb2 Mon Sep 17 00:00:00 2001 From: Vasily Averin <vvs@virtuozzo.com> Date: Thu, 14 Jan 2016 13:41:14 +0300 Subject: cifs_dbg() outputs an uninitialized buffer in cifs_readdir() 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@virtuozzo.com> Signed-off-by: Steve French <sfrench@localhost.localdomain> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- fs/cifs/readdir.c | 1 + 1 file changed, 1 insertion(+)