From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Chuck Lever <chuck.lever@oracle.com>,
stable@kernel.org,
Trond Myklebust <trond.myklebust@hammerspace.com>,
Sasha Levin <sashal@kernel.org>,
linux-nfs@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 26/73] SUNRPC: Fix leak of krb5p encode pages
Date: Wed, 12 Dec 2018 23:27:51 -0500 [thread overview]
Message-ID: <20181213042838.75160-26-sashal@kernel.org> (raw)
In-Reply-To: <20181213042838.75160-1-sashal@kernel.org>
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 21c0aa0a0d1d..8cb7d812ccb8 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -1768,6 +1768,7 @@ 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
@@ -1776,6 +1777,9 @@ 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;
--
2.19.1
next prev parent reply other threads:[~2018-12-13 4:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20181213042838.75160-1-sashal@kernel.org>
2018-12-13 4:27 ` [PATCH AUTOSEL 4.19 25/73] nfs: don't dirty kernel pages read by direct-io Sasha Levin
2018-12-13 4:27 ` Sasha Levin [this message]
2018-12-13 4:27 ` [PATCH AUTOSEL 4.19 27/73] SUNRPC: Fix a potential race in xprt_connect() Sasha Levin
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