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btrfs: Drop inode if inode root is NULL

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There is a path where btrfs_drop_inode() is called with its inode's root
is NULL: In btrfs_new_inode(), when btrfs_set_inode_index() fails,
iput() is called. We should handle this case before taking look at the
root->root_item.

Signed-off-by: Naohiro Aota <[email protected]>
Reviewed-by: Miao Xie <[email protected]>
Signed-off-by: Josef Bacik <[email protected]>
Signed-off-by: Chris Mason <[email protected]>
This commit is contained in:
Naohiro Aota 2013-06-06 09:56:34 +00:00 • committed by Chris Mason
commit 6379ef9fb2
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/inode.c
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@ -8011,6 +8011,9 @@ int btrfs_drop_inode(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
if (root == NULL)
return 1;
/* the snap/subvol tree is on deleting */
if (btrfs_root_refs(&root->root_item) == 0 &&
root != root->fs_info->tree_root)