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| author | Amerigo Wang <amwang@redhat.com> | 2009-12-15 02:59:52 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-15 17:53:23 +0100 |
| commit | 70da2340fbc68e91e701762f785479ab495a0869 (patch) | |
| tree | f55055a8fa8cb8e00b72ae8f3629dc884515f5e9 /mm/hugetlb.c | |
| parent | include/linux/mm.h: remove unneeded ifdef (diff) | |
| download | linux-70da2340fbc68e91e701762f785479ab495a0869.tar.xz linux-70da2340fbc68e91e701762f785479ab495a0869.zip | |
'sysctl_max_map_count' should be non-negative
Jan Engelhardt reported we have this problem:
setting max_map_count to a value large enough results in programs dying at
first try. This is on 2.6.31.6:
15:59 borg:/proc/sys/vm # echo $[1<<31-1] >max_map_count
15:59 borg:/proc/sys/vm # cat max_map_count
1073741824
15:59 borg:/proc/sys/vm # echo $[1<<31] >max_map_count
15:59 borg:/proc/sys/vm # cat max_map_count
Killed
This is because we have a chance to make 'max_map_count' negative. but
it's meaningless. Make it only accept non-negative values.
Reported-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: James Morris <jmorris@namei.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
0 files changed, 0 insertions, 0 deletions