Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.4 42/70] fs/exofs: fix potential memory leak in mount option parsing | Date | Mon, 26 Nov 2018 11:50:57 +0100 |
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4.4-stable review patch. If anyone has any objections, please let me know.
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[ Upstream commit 515f1867addaba49c1c6ac73abfaffbc192c1db4 ]
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> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 b795c567b5e1..360ba74e04e6 100644 --- a/fs/exofs/super.c +++ b/fs/exofs/super.c @@ -100,6 +100,7 @@ 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"); @@ -868,8 +869,10 @@ 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; -- 2.17.1
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