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drbd: Null pointer deref fix to the large "multi bio rewrite"
[safe/jmp/linux-2.6]
/
drivers
/
block
/
drbd
/
drbd_receiver.c
diff --git
a/drivers/block/drbd/drbd_receiver.c
b/drivers/block/drbd/drbd_receiver.c
index
461d987
..
bc9ab7f
100644
(file)
--- a/
drivers/block/drbd/drbd_receiver.c
+++ b/
drivers/block/drbd/drbd_receiver.c
@@
-98,6
+98,10
@@
static struct page *page_chain_del(struct page **head, int n)
BUG_ON(!head);
page = *head;
+
+ if (!page)
+ return NULL;
+
while (page) {
tmp = page_chain_next(page);
if (--n == 0)