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btrfs: delayed-ref: double free in btrfs_add_delayed_tree_ref()

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There is a cut and paste error so instead of freeing "head_ref", we free
"ref" twice.

Fixes: 3368d001ba ('btrfs: qgroup: Record possible quota-related extent for qgroup.')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Dan Carpenter 2015-06-24 17:32:33 +03:00 committed by Chris Mason
parent c40b7b064f
commit 5a5003df98
1 changed files with 11 additions and 9 deletions
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20
fs/btrfs/delayed-ref.c
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@ -650,18 +650,13 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
return -ENOMEM;
head_ref = kmem_cache_alloc(btrfs_delayed_ref_head_cachep, GFP_NOFS);
if (!head_ref) {
kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
return -ENOMEM;
}
if (!head_ref)
goto free_ref;
if (fs_info->quota_enabled && is_fstree(ref_root)) {
record = kmalloc(sizeof(*record), GFP_NOFS);
if (!record) {
kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
kmem_cache_free(btrfs_delayed_ref_head_cachep, ref);
return -ENOMEM;
}
if (!record)
goto free_head_ref;
}
head_ref->extent_op = extent_op;
@ -682,6 +677,13 @@ int btrfs_add_delayed_tree_ref(struct btrfs_fs_info *fs_info,
spin_unlock(&delayed_refs->lock);
return 0;
free_head_ref:
kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
free_ref:
kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
return -ENOMEM;
}
/*