NFSv4: Fix acl buffer size

 resp_len is passed in as buffer size to decode routine; make sure it's
 set right in case where userspace provides less than a page's worth of
 buffer.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ff378126ccd768fc39710f16a0eab0483156990c..2d9357cf3fc59c493c5f9eb3708237bb8b8b598f 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2357,7 +2357,7 @@ static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size
                        return -ENOMEM;
                args.acl_pages[0] = localpage;
                args.acl_pgbase = 0;
-               args.acl_len = PAGE_SIZE;
+               resp_len = args.acl_len = PAGE_SIZE;
        } else {
                resp_buf = buf;
                buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);