diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2012-01-18 12:56:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-02 09:27:21 -0700 |
| commit | 8bb8ebe7b77228209006ea945104e37294608b93 (patch) | |
| tree | af8bec9326714b57304226280f2edad9cc1c6445 /net | |
| parent | 12810ac9f485e5ea6106181b3dcb690e986cc06a (diff) | |
nfsd: don't allow zero length strings in cache_parse()
commit 6d8d17499810479eabd10731179c04b2ca22152f upstream.
There is no point in passing a zero length string here and quite a
few of that cache_parse() implementations will Oops if count is
zero.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sunrpc/cache.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 72ad836e4fe..4530a912b8b 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -828,6 +828,8 @@ static ssize_t cache_do_downcall(char *kaddr, const char __user *buf, { ssize_t ret; + if (count == 0) + return -EINVAL; if (copy_from_user(kaddr, buf, count)) return -EFAULT; kaddr[count] = '\0'; |