From: Ilya Dryomov <idryomov@gmail.com>
Date: Tue, 27 Mar 2012 14:09:18 +0000 (+0300)
Subject: Btrfs: fix memory leak in resolver code
X-Git-Tag: firefly_0821_release~3680^2~2940^2~50^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5eb56d2520fe16f00756ccdf8eebc277398e0f44;p=firefly-linux-kernel-4.4.55.git

Btrfs: fix memory leak in resolver code

init_ipath() allocates btrfs_data_container which is never freed.  Free
it in free_ipath() and nuke the comment for init_data_container() - we
can safely free it with kfree().

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 0436c12da8c2..4c79547f4a0c 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1342,12 +1342,6 @@ int paths_from_inode(u64 inum, struct inode_fs_paths *ipath)
 				inode_to_path, ipath);
 }
 
-/*
- * allocates space to return multiple file system paths for an inode.
- * total_bytes to allocate are passed, note that space usable for actual path
- * information will be total_bytes - sizeof(struct inode_fs_paths).
- * the returned pointer must be freed with free_ipath() in the end.
- */
 struct btrfs_data_container *init_data_container(u32 total_bytes)
 {
 	struct btrfs_data_container *data;
@@ -1403,5 +1397,6 @@ struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
 
 void free_ipath(struct inode_fs_paths *ipath)
 {
+	kfree(ipath->fspath);
 	kfree(ipath);
 }