From ce4a99ac9017583c24b10283365217526d77f4dd Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Fri, 30 Nov 2018 15:39:57 -0500 Subject: [PATCH] SUNRPC: Fix leak of krb5p encode pages commit 8dae5398ab1ac107b1517e8195ed043d5f422bd0 upstream. call_encode can be invoked more than once per RPC call. Ensure that each call to gss_wrap_req_priv does not overwrite pointers to previously allocated memory. Signed-off-by: Chuck Lever Cc: stable@kernel.org Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- net/sunrpc/auth_gss/auth_gss.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c index 16cea00c959b..591d378d1a18 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -1736,6 +1736,7 @@ priv_release_snd_buf(struct rpc_rqst *rqstp) for (i=0; i < rqstp->rq_enc_pages_num; i++) __free_page(rqstp->rq_enc_pages[i]); kfree(rqstp->rq_enc_pages); + rqstp->rq_release_snd_buf = NULL; } static int @@ -1744,6 +1745,9 @@ alloc_enc_pages(struct rpc_rqst *rqstp) struct xdr_buf *snd_buf = &rqstp->rq_snd_buf; int first, last, i; + if (rqstp->rq_release_snd_buf) + rqstp->rq_release_snd_buf(rqstp); + if (snd_buf->page_len == 0) { rqstp->rq_enc_pages_num = 0; return 0; -- 2.20.1