On 09/14/16 04:02, Liu Bo wrote:
> The extent buffer 'next' needs to be free'd conditionally.
>
> Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
> ---
> fs/btrfs/extent-tree.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
> index 5a940ab..779fd72 100644
> --- a/fs/btrfs/extent-tree.c
> +++ b/fs/btrfs/extent-tree.c
> @@ -8882,6 +8882,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
> &wc->flags[level - 1]);
> if (ret < 0) {
> btrfs_tree_unlock(next);
> + free_extent_buffer(next);
> return ret;
> }
>
>
This was fixed a long time ago by the following patch by Josef:
"Btrfs: don't BUG() during drop snapshot"
https://patchwork.kernel.org/patch/7002791/
..which never got merged. I've been using it since 4.1.x until today
without problems.
Note that apparently Patchwork got confused here: downloading only the
"patch" fragment won't work; you'll need the full "mbox" attachment.
It also seems to have been sorted into the wrong list bucket for some
reason.
-h
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