| Date | Fri, 15 Jan 2010 19:06:33 -0800 | From | Yinghai Lu <> | Subject | [PATCH 02/37] x86: check range in update range |
| |
fend off wrong range
Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- kernel/range.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/kernel/range.c b/kernel/range.c index 46a10c8..71e0021 100644 --- a/kernel/range.c +++ b/kernel/range.c @@ -13,6 +13,9 @@ int add_range(struct range *range, int az, int nr_range, u64 start, u64 end) { + if (start > end) + return nr_range; + /* Out of slots: */ if (nr_range >= az) return nr_range; @@ -30,6 +33,9 @@ int add_range_with_merge(struct range *range, int az, int nr_range, { int i; + if (start > end) + return nr_range; + /* Try to merge it with old one: */ for (i = 0; i < nr_range; i++) { u64 final_start, final_end; @@ -59,6 +65,9 @@ void subtract_range(struct range *range, int az, u64 start, u64 end) { int i, j; + if (start > end) + return; + for (j = 0; j < az; j++) { if (!range[j].end) continue; -- 1.6.4.2
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