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authorAndrew Morton <akpm@linux-foundation.org>2009-04-30 15:08:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-05-02 15:36:10 -0700
commit8713e01295140f674a41f2199b0f7ca99dfb69d5 (patch)
tree0e222bd3469534f040c087c334b68e869e2dbb5f /mm
parentptrace: s/parent/real_parent/ in binfmt_elf_fdpic.c (diff)
downloadlinux-dev-8713e01295140f674a41f2199b0f7ca99dfb69d5.tar.xz
linux-dev-8713e01295140f674a41f2199b0f7ca99dfb69d5.zip
vmscan: avoid multiplication overflow in shrink_zone()
Local variable `scan' can overflow on zones which are larger than (2G * 4k) / 100 = 80GB. Making it 64-bit on 64-bit will fix that up. Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/vmscan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c
index eac9577941f9..5fa3eda1f03f 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -1471,7 +1471,7 @@ static void shrink_zone(int priority, struct zone *zone,
for_each_evictable_lru(l) {
int file = is_file_lru(l);
- int scan;
+ unsigned long scan;
scan = zone_nr_pages(zone, sc, l);
if (priority) {