knfsd: rpc: fix server-side wrapping of krb5i replies
It's not necessarily correct to assume that the xdr_buf used to hold the
server's reply must have page data whenever it has tail data.
And there's no need for us to deal with that case separately anyway.
Acked-by: "J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index db298b5..c678f5f 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1196,13 +1196,7 @@
if (xdr_buf_subsegment(resbuf, &integ_buf, integ_offset,
integ_len))
BUG();
- if (resbuf->page_len == 0
- && resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE
- < PAGE_SIZE) {
- BUG_ON(resbuf->tail[0].iov_len);
- /* Use head for everything */
- resv = &resbuf->head[0];
- } else if (resbuf->tail[0].iov_base == NULL) {
+ if (resbuf->tail[0].iov_base == NULL) {
if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE > PAGE_SIZE)
goto out_err;
resbuf->tail[0].iov_base = resbuf->head[0].iov_base
