提交 153e44d2 编写于 作者: N NeilBrown 提交者: Linus Torvalds

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: N"J. Bruce Fields" <bfields@citi.umich.edu>
Signed-off-by: NNeil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 402acd29
......@@ -1196,13 +1196,7 @@ svcauth_gss_wrap_resp_integ(struct svc_rqst *rqstp)
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
......
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