ZVC: Fix potential use of out of range page in kmem_getpages.
We use page_zone(page) following several page increments in kmem_getpages().
Which page in a zone we use really does not matter. However, we may reach an
invalid page and then oops.
So move the counter decrement before we increment page.
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux-2.6.17-mm3/mm/slab.c
===================================================================
--- linux-2.6.17-mm3.orig/mm/slab.c 2006-06-27 09:40:25.620599382 -0700
+++ linux-2.6.17-mm3/mm/slab.c 2006-06-27 09:40:32.330144958 -0700
@@ -1539,12 +1539,12 @@ static void kmem_freepages(struct kmem_c
struct page *page = virt_to_page(addr);
const unsigned long nr_freed = i;
+ sub_zone_page_state(page_zone(page), NR_SLAB, nr_freed);
while (i--) {
BUG_ON(!PageSlab(page));
__ClearPageSlab(page);
page++;
}
- sub_zone_page_state(page_zone(page), NR_SLAB, nr_freed);
if (current->reclaim_state)
current->reclaim_state->reclaimed_slab += nr_freed;
free_pages((unsigned long)addr, cachep->gfporder);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
