4.16-stable review patch. If anyone has any objections, please let me know.
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From: Chengguang Xu cgxu519@gmx.com
[ Upstream commit 4f34a5130a471f32f2fe7750769ab4057dc3eaa0 ]
When specifying string type mount option (e.g., iocharset) several times in a mount, current option parsing may cause memory leak. Hence, call kfree for previous one in this case. Meanwhile, check memory allocation result for it.
Signed-off-by: Chengguang Xu cgxu519@gmx.com Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/isofs/inode.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/fs/isofs/inode.c +++ b/fs/isofs/inode.c @@ -394,7 +394,10 @@ static int parse_options(char *options, break; #ifdef CONFIG_JOLIET case Opt_iocharset: + kfree(popt->iocharset); popt->iocharset = match_strdup(&args[0]); + if (!popt->iocharset) + return 0; break; #endif case Opt_map_a: