Btrfs: kfree correct pointer during mount option parsing
We kstrdup the options string, but then strsep screws with the pointer,
so when we kfree() it, we're not giving it the right pointer.
Tested-by: Andy Lutomirski <luto@mit.edu>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 8a1ea6e..f8b4521 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -128,7 +128,7 @@
{
struct btrfs_fs_info *info = root->fs_info;
substring_t args[MAX_OPT_ARGS];
- char *p, *num;
+ char *p, *num, *orig;
int intarg;
int ret = 0;
@@ -143,6 +143,7 @@
if (!options)
return -ENOMEM;
+ orig = options;
while ((p = strsep(&options, ",")) != NULL) {
int token;
@@ -280,7 +281,7 @@
}
}
out:
- kfree(options);
+ kfree(orig);
return ret;
}