On Thu, Jun 23, 2011 at 11:01:01PM +0800, Daniel J Blueman wrote: > On 23 June 2011 18:31, David Sterba <[email protected]> wrote: > (how does one follow up an email in git send-email with the message id?)
git-send-email --in-reply-to=<identifier> (if it does not ask for it) and paste identifier from mail header In-Reply-To: > If lookup_extent_backref fails, path->nodes[0] reasonably could be > null along with other callers of btrfs_print_leaf, so ensure we have a > valid extent buffer before dereferencing. ack. thanks, david > > Signed-off-by: Daniel J Blueman <[email protected]> > > diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c > index fb2605d..f38e452 100644 > --- a/fs/btrfs/print-tree.c > +++ b/fs/btrfs/print-tree.c > @@ -158,8 +158,7 @@ static void print_extent_ref_v0(struct > extent_buffer *eb, int slot) > void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l) > { > int i; > - u32 type; > - u32 nr = btrfs_header_nritems(l); > + u32 type, nr; > struct btrfs_item *item; > struct btrfs_root_item *ri; > struct btrfs_dir_item *di; > @@ -172,6 +171,11 @@ void btrfs_print_leaf(struct btrfs_root *root, > struct extent_buffer *l) > struct btrfs_key key; > struct btrfs_key found_key; > > + if (!l) > + return; > + > + nr = btrfs_header_nritems(l); > + > printk(KERN_INFO "leaf %llu total ptrs %d free space %d\n", > (unsigned long long)btrfs_header_bytenr(l), nr, > btrfs_leaf_free_space(root, l)); > -- > Daniel J Blueman -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
