NFSv4: fix getacl ERANGE for some ACL buffer sizes

[pandora-kernel.git] / fs / nfs / nfs4proc.c

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 927a664..8f509a0 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3569,7 +3569,7 @@ out:
  */
 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
 {
-       struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
+       struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
        struct nfs_getaclargs args = {
                .fh = NFS_FH(inode),
                .acl_pages = pages,
@@ -3583,14 +3583,10 @@ static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t bu
                .rpc_argp = &args,
                .rpc_resp = &res,
        };
-       unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
+       unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
        int ret = -ENOMEM, i;
        size_t acl_len = 0;
 
-       /* As long as we're doing a round trip to the server anyway,
-        * let's be prepared for a page of acl data. */
-       if (npages == 0)
-               npages = 1;
        if (npages > ARRAY_SIZE(pages))
                return -ERANGE;