tree a433c13c530c487f2d7e209402ef72ec67e48647
parent b9fab919b748c7b39c19ff236ed6c5682c266dde
author Jan Schmidt <list.btrfs@jan-o-sch.net> 1337691410 +0200
committer Jan Schmidt <list.btrfs@jan-o-sch.net> 1338027469 +0200

Btrfs: ulist realloc bugfix

ulist_next gets the pointer to the previously returned element to find the
next element from there. However, when we call ulist_add while iteration
with ulist_next is in progress (ulist explicitly supports this), we can
realloc the ulist internal memory, which makes the pointer to the previous
element useless.

Instead, we now use an iterator parameter that's independent from the
internal pointers.

Reported-by: Alexander Block <ablock84@googlemail.com>
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>