xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

btrfs: sanitizing ->fs_info, part 4

Browse Source 
A new helper: btrfs_alloc_root(fs_info); allocates btrfs_root
and sets ->fs_info.  All places allocating the suckers converted
to it.  At that point we *never* reassign ->fs_info of btrfs_root;
it's set before anyone sees the address of newly allocated
struct btrfs_root and never assigned anywhere else.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2011-11-17 00:46:16 -05:00
parent 38a77db49a
commit 6f07e42ee6
3 changed files with 18 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/super.c
View File

@@ -901,12 +901,11 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
if (!fs_info)
return ERR_PTR(-ENOMEM);
fs_info->tree_root = kzalloc(sizeof(struct btrfs_root), GFP_NOFS);
fs_info->tree_root = btrfs_alloc_root(fs_info);
if (!fs_info->tree_root) {
error = -ENOMEM;
goto error_fs_info;
}
fs_info->tree_root->fs_info = fs_info;
fs_info->fs_devices = fs_devices;
fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_NOFS);