netdev - [PATCH net-next v1] net/9p/trans_fd: check the return value of parse

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Date:   Wed, 21 Sep 2022 14:09:21 -0700
From:   Li Zhong <floridsleeves@...il.com>
To:     netdev@...r.kernel.org, v9fs-developer@...ts.sourceforge.net
Cc:     pabeni@...hat.com, kuba@...nel.org, edumazet@...gle.com,
        davem@...emloft.net, linux_oss@...debyte.com,
        asmadeus@...ewreck.org, lucho@...kov.net, ericvh@...il.com,
        Li Zhong <floridsleeves@...il.com>
Subject: [PATCH net-next v1] net/9p/trans_fd: check the return value of parse_opts

parse_opts() could fail when there is error parsing mount options into
p9_fd_opts structure due to allocation failure. In that case opts will
contain invalid data.

Signed-off-by: Li Zhong <floridsleeves@...il.com>
---
 net/9p/trans_fd.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index e758978b44be..11ae64c1a24b 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -1061,7 +1061,9 @@ p9_fd_create(struct p9_client *client, const char *addr, char *args)
 	int err;
 	struct p9_fd_opts opts;
 
-	parse_opts(args, &opts);
+	err = parse_opts(args, &opts);
+	if (err < 0)
+		return err;
 	client->trans_opts.fd.rfd = opts.rfd;
 	client->trans_opts.fd.wfd = opts.wfd;
 
-- 
2.25.1