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| author |   Andrew Morton <akpm@linux-foundation.org> | 2009-04-30 15:08:55 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2009-05-02 15:36:10 -0700 |
| commit | 8713e01295140f674a41f2199b0f7ca99dfb69d5 (patch) | |
| tree | 0e222bd3469534f040c087c334b68e869e2dbb5f /mm/vmscan.c | |
| parent | ptrace: s/parent/real_parent/ in binfmt_elf_fdpic.c (diff) | |
| download | linux-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/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 2 |
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) { |