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kmalloc a few large stack objects in the btrfs_ioctl path

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-12-18 16:25:45 -05:00
parent 6da6abae02
commit 4aec2b5232
2 changed files with 56 additions and 24 deletions
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20
fs/btrfs/ctree.c
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@@ -80,10 +80,14 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
int ret = 0;
int level;
struct btrfs_key first_key;
struct btrfs_root new_root;
struct btrfs_root *new_root;
memcpy(&new_root, root, sizeof(new_root));
new_root.root_key.objectid = new_root_objectid;
new_root = kmalloc(sizeof(*new_root), GFP_NOFS);
if (!new_root)
return -ENOMEM;
memcpy(new_root, root, sizeof(*new_root));
new_root->root_key.objectid = new_root_objectid;
WARN_ON(root->ref_cows && trans->transid !=
root->fs_info->running_transaction->transid);
@@ -99,12 +103,14 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
} else {
first_key.objectid = 0;
}
cow = __btrfs_alloc_free_block(trans, &new_root, buf->len,
cow = __btrfs_alloc_free_block(trans, new_root, buf->len,
new_root_objectid,
trans->transid, first_key.objectid,
level, buf->start, 0);
if (IS_ERR(cow))
if (IS_ERR(cow)) {
kfree(new_root);
return PTR_ERR(cow);
}
copy_extent_buffer(cow, buf, 0, 0, cow->len);
btrfs_set_header_bytenr(cow, cow->start);
@@ -112,7 +118,9 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
btrfs_set_header_owner(cow, new_root_objectid);
WARN_ON(btrfs_header_generation(buf) > trans->transid);
ret = btrfs_inc_ref(trans, &new_root, buf);
ret = btrfs_inc_ref(trans, new_root, buf);
kfree(new_root);
if (ret)
return ret;