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 3.18-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-3.18 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-3.18/cifs-check-maxpathnamecomponentlength-0-before-using-it.patch