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infra: fix bounds checking in len2order()

This commit is contained in:
Thomas Schoebel-Theuer 2014-04-22 11:34:40 +02:00
parent 21fe963c5e
commit a989a43ecd
1 changed files with 8 additions and 3 deletions
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11
kernel/brick_mem.c
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@ -359,12 +359,17 @@ int len2order(int len)
{
int order = 0;
if (unlikely(len <= 0)) {
BRICK_ERR("trying to use %d bytes\n", len);
return 0;
}
while ((PAGE_SIZE << order) < len)
order++;
if (unlikely(order > BRICK_MAX_ORDER || len <= 0)) {
BRICK_ERR("trying to allocate %d bytes (max = %d)\n", len, (int)(PAGE_SIZE << order));
return -1;
if (unlikely(order > BRICK_MAX_ORDER)) {
BRICK_ERR("trying to use %d bytes (oder = %d, max = %d)\n", len, order, BRICK_MAX_ORDER);
return BRICK_MAX_ORDER;
}
return order;
}