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Btrfs: Fix compressed writes on truncated pages

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The compression code was using isize to limit the amount of data it
sent through zlib.  But, it wasn't properly limiting the looping to
just the pages inside i_size.  The end result was trying to compress
too many pages, including those that had not been setup and properly locked
down.  This made the compression code oops while trying find_get_page on a
page that didn't exist.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2008-12-15 11:44:56 -05:00
parent 17d217fe97
commit 42dc7babdc
2 changed files with 6 additions and 4 deletions
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2
fs/btrfs/ctree.c
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@@ -2887,8 +2887,8 @@ int btrfs_split_item(struct btrfs_trans_handle *trans,
path->keep_locks = 0;
BUG_ON(ret);
BUG_ON(btrfs_leaf_free_space(root, leaf) < sizeof(struct btrfs_item));
leaf = path->nodes[0];
BUG_ON(btrfs_leaf_free_space(root, leaf) < sizeof(struct btrfs_item));
split:
item = btrfs_item_nr(leaf, path->slots[0]);