tree 4b43de1a87a3047d783234c9fe5e036d1dafcc48
parent 2c8adbfa328384986452fd64e1ad93b24729d418
author Dan Carpenter <dan.carpenter@oracle.com> 1536227271 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1537943797 +0200

cifs: prevent integer overflow in nxt_dir_entry()

commit 8ad8aa353524d89fa2e09522f3078166ff78ec42 upstream.

The "old_entry + le32_to_cpu(pDirInfo->NextEntryOffset)" can wrap
around so I have added a check for integer overflow.

Reported-by: Dr Silvio Cesare of InfoSect <silvio.cesare@gmail.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>