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authorChuck Lever <chuck.lever@oracle.com>2018-11-30 15:39:57 -0500
committerTrond Myklebust <trond.myklebust@hammerspace.com>2018-12-02 09:43:56 -0500
commit8dae5398ab1ac107b1517e8195ed043d5f422bd0 (patch)
tree4a9fd027ef08f3903bf31a47dc16b0ae3e59a4e1 /net
parent9bd11523dc1b9293d1eee2c0b8cfc986a312bbce (diff)
downloadlinux-8dae5398ab1ac107b1517e8195ed043d5f422bd0.tar.bz2
SUNRPC: Fix leak of krb5p encode pages
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>
Diffstat (limited to 'net')
-rw-r--r--net/sunrpc/auth_gss/auth_gss.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index 5d3f252659f1..ba765473d1f0 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -1791,6 +1791,7 @@ 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
@@ -1799,6 +1800,9 @@ 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;