* [PATCH] btrfs: Drop inode if inode root is NULL
@ 2013-06-06 9:56 naota
2013-06-06 10:13 ` Miao Xie
0 siblings, 1 reply; 2+ messages in thread
From: naota @ 2013-06-06 9:56 UTC (permalink / raw)
To: Chris Mason, linux-btrfs; +Cc: linux-kernel
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 <naota@elisp.net>
---
fs/btrfs/inode.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index af978f7..17f3064 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8012,6 +8012,9 @@ 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)
--
1.8.2.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH] btrfs: Drop inode if inode root is NULL
2013-06-06 9:56 [PATCH] btrfs: Drop inode if inode root is NULL naota
@ 2013-06-06 10:13 ` Miao Xie
0 siblings, 0 replies; 2+ messages in thread
From: Miao Xie @ 2013-06-06 10:13 UTC (permalink / raw)
To: naota; +Cc: Chris Mason, linux-btrfs, linux-kernel
On thu, 06 Jun 2013 18:56:34 +0900, naota@elisp.net wrote:
> 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 <naota@elisp.net>
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
> ---
> fs/btrfs/inode.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
> index af978f7..17f3064 100644
> --- a/fs/btrfs/inode.c
> +++ b/fs/btrfs/inode.c
> @@ -8012,6 +8012,9 @@ 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)
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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