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fix bug in secure mode where adjustment would make the page size less than the blocksize on the first page of a segment

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This commit is contained in:
Daan 2022-11-06 14:51:06 -08:00
parent d3715132d1
commit 3eb616f2bf
2 changed files with 8 additions and 5 deletions
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12
src/segment.c
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@ -403,12 +403,14 @@ uint8_t* _mi_segment_page_start(const mi_segment_t* segment, const mi_page_t* pa
if (page->segment_idx == 0 && block_size > 0 && segment->page_kind <= MI_PAGE_MEDIUM) {
// for small and medium objects, ensure the page start is aligned with the block size (PR#66 by kickunderscore)
size_t adjust = block_size - ((uintptr_t)p % block_size);
if (adjust < block_size) {
p += adjust;
psize -= adjust;
if (pre_size != NULL) *pre_size = adjust;
if (psize - adjust >= block_size) {
if (adjust < block_size) {
p += adjust;
psize -= adjust;
if (pre_size != NULL) *pre_size = adjust;
}
mi_assert_internal((uintptr_t)p % block_size == 0);
}
mi_assert_internal((uintptr_t)p % block_size == 0);
}
if (page_size != NULL) *page_size = psize;