From 515f1867addaba49c1c6ac73abfaffbc192c1db4 Mon Sep 17 00:00:00 2001
From: Chengguang Xu <cgxu519@gmx.com>
Date: Wed, 13 Jun 2018 12:05:13 +0800
Subject: [PATCH] fs/exofs: fix potential memory leak in mount option parsing
Git-commit: 515f1867addaba49c1c6ac73abfaffbc192c1db4
Patch-mainline: v4.20-rc1
References: git-fixes
There are some cases can cause memory leak when parsing
option 'osdname'.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Anthony Iliopoulos <ailiop@suse.com>
---
fs/exofs/super.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
index 41cf2fbee50d..7d61e3fa378c 100644
--- a/fs/exofs/super.c
+++ b/fs/exofs/super.c
@@ -101,6 +101,7 @@ static int parse_options(char *options, struct exofs_mountopt *opts)
token = match_token(p, tokens, args);
switch (token) {
case Opt_name:
+ kfree(opts->dev_name);
opts->dev_name = match_strdup(&args[0]);
if (unlikely(!opts->dev_name)) {
EXOFS_ERR("Error allocating dev_name");
@@ -866,8 +867,10 @@ static struct dentry *exofs_mount(struct file_system_type *type,
int ret;
ret = parse_options(data, &opts);
- if (ret)
+ if (ret) {
+ kfree(opts.dev_name);
return ERR_PTR(ret);
+ }
if (!opts.dev_name)
opts.dev_name = dev_name;
--
2.43.0