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| author | Wu Fengguang <fengguang.wu@intel.com> | 2009-10-26 16:49:53 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-11-09 16:23:05 -0800 |
| commit | 94f48f549e455e4abbb3f0d6e65185830cbec8f1 (patch) | |
| tree | 69ec9b645ea8dc731dfd2dac69567653569c8608 /lib/swiotlb.c | |
| parent | 781e844b1db70e0fe4911fa049e675a010d79cf9 (diff) | |
vmscan: limit VM_EXEC protection to file pages
commit 41e20983fe553b39bc2b00e07c7a379f0c86a4bc upstream.
It is possible to have !Anon but SwapBacked pages, and some apps could
create huge number of such pages with MAP_SHARED|MAP_ANONYMOUS. These
pages go into the ANON lru list, and hence shall not be protected: we only
care mapped executable files. Failing to do so may trigger OOM.
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/swiotlb.c')
0 files changed, 0 insertions, 0 deletions