From 9421c3e64137ec69e5cf4ed024dc777a09b7779f Mon Sep 17 00:00:00 2001 From: Chengguang Xu Date: Thu, 5 Apr 2018 16:20:01 -0700 Subject: net/9p/client.c: fix potential refcnt problem of trans module When specifying trans_mod multiple times in a mount, it will cause an inaccurate refcount of the trans module. Also, in the error case of option parsing, we should put the trans module if we have already got it. Link: http://lkml.kernel.org/r/1522154942-57339-1-git-send-email-cgxu519@gmx.com Signed-off-by: Chengguang Xu Reviewed-by: Andrew Morton Cc: David Miller Cc: Eric Van Hensbergen Cc: Ron Minnich Cc: Latchesar Ionkov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- net/9p/client.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'net/9p') diff --git a/net/9p/client.c b/net/9p/client.c index e6cae8332e2e..21e6df1cc70f 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -190,7 +190,9 @@ static int parse_opts(char *opts, struct p9_client *clnt) p9_debug(P9_DEBUG_ERROR, "problem allocating copy of trans arg\n"); goto free_and_return; - } + } + + v9fs_put_trans(clnt->trans_mod); clnt->trans_mod = v9fs_get_trans_by_name(s); if (clnt->trans_mod == NULL) { pr_info("Could not find request transport: %s\n", @@ -226,6 +228,7 @@ static int parse_opts(char *opts, struct p9_client *clnt) } free_and_return: + v9fs_put_trans(clnt->trans_mod); kfree(tmp_options); return ret; } -- cgit v1.2.3