[PATCH] Btrfs: fix memory leak in btrfs_parse_early_options()

[Ilya Dryomov]

strsep() modifies the string pointer, therefore freeing it instead of
original one results in a small memory leak.  Fixes kmemleak warning.

Signed-off-by: Ilya Dryomov <idryo...@gmail.com>
---
 fs/btrfs/super.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 883c6fa..291b630 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -277,7 +277,7 @@ static int btrfs_parse_early_options(const char *options, 
fmode_t flags,
                struct btrfs_fs_devices **fs_devices)
 {
        substring_t args[MAX_OPT_ARGS];
-       char *opts, *p;
+       char *opts, *opts_orig, *p;
        int error = 0;
        int intarg;
 
@@ -288,7 +288,7 @@ static int btrfs_parse_early_options(const char *options, 
fmode_t flags,
         * strsep changes the string, duplicate it because parse_options
         * gets called twice
         */
-       opts = kstrdup(options, GFP_KERNEL);
+       opts = opts_orig = kstrdup(options, GFP_KERNEL);
        if (!opts)
                return -ENOMEM;
 
@@ -326,7 +326,7 @@ static int btrfs_parse_early_options(const char *options, 
fmode_t flags,
        }
 
  out_free_opts:
-       kfree(opts);
+       kfree(opts_orig);
  out:
        /*
         * If no subvolume name is specified we use the default one.  Allocate
-- 
1.7.2.3

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