This is a note to let you know that I've just added the patch titled
cifs: check MaxPathNameComponentLength != 0 before using it
to the 4.9-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-check-maxpathnamecomponentlength-0-before-using-it.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f74bc7c6679200a4a83156bb89cbf6c229fe8ec0 Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
Date: Mon, 30 Oct 2017 13:28:03 +1100
Subject: cifs: check MaxPathNameComponentLength != 0 before using it
From: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
commit f74bc7c6679200a4a83156bb89cbf6c229fe8ec0 upstream.
And fix tcon leak in error path.
Signed-off-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx>
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
Reviewed-by: David Disseldorp <ddiss@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/dir.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -193,7 +193,8 @@ check_name(struct dentry *direntry, stru
struct cifs_sb_info *cifs_sb = CIFS_SB(direntry->d_sb);
int i;
- if (unlikely(direntry->d_name.len >
+ if (unlikely(tcon->fsAttrInfo.MaxPathNameComponentLength &&
+ direntry->d_name.len >
le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength)))
return -ENAMETOOLONG;
@@ -509,7 +510,7 @@ cifs_atomic_open(struct inode *inode, st
rc = check_name(direntry, tcon);
if (rc)
- goto out_free_xid;
+ goto out;
server = tcon->ses->server;
Patches currently in stable-queue which might be from lsahlber@xxxxxxxxxx are
queue-4.9/cifs-check-maxpathnamecomponentlength-0-before-using-it.patch