From: Chuck Lever chuck.lever@oracle.com
[ Upstream commit 8dae5398ab1ac107b1517e8195ed043d5f422bd0 ]
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 chuck.lever@oracle.com Cc: stable@kernel.org Signed-off-by: Trond Myklebust trond.myklebust@hammerspace.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 1f0687d8e3d7..62fca77bf3c7 100644 --- a/net/sunrpc/auth_gss/auth_gss.c +++ b/net/sunrpc/auth_gss/auth_gss.c @@ -1722,6 +1722,7 @@ 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 @@ -1730,6 +1731,9 @@ 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;