From 72b19f30985230979d812ae65a3fd4c28067a589 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Wed, 11 Feb 2015 17:27:55 -0500
Subject: [PATCH] NFSv4.1: Fix a kfree() of uninitialised pointers in
decode_cb_sequence_args
commit d8ba1f971497c19cf80da1ea5391a46a5f9fbd41 upstream.
If the call to decode_rc_list() fails due to a memory allocation error,
then we need to truncate the array size to ensure that we only call
kfree() on those pointer that were allocated.
Reported-by: David Ramos <daramos@stanford.edu>
Fixes: 4aece6a19cf7f ("nfs41: cb_sequence xdr implementation")
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/nfs/callback_xdr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index a35582c9d444..e98ecf8d2588 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -464,8 +464,10 @@ static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
for (i = 0; i < args->csa_nrclists; i++) {
status = decode_rc_list(xdr, &args->csa_rclists[i]);
- if (status)
+ if (status) {
+ args->csa_nrclists = i;
goto out_free;
+ }
}
}
status = 0;
--
2.34.1