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来自专栏赤道企鹅的博客
[heap] House of Orange 堆利用技巧
= 0)); 将这些限制总结起来就是：分配大小限制：分配的chunk大小小于128K（此时将使用brk拓展堆，否则将使用mmap）分配的chunk大小应大于被修改后的Top Chunk大小减去 fencepost
42130编辑于 2022-08-01
来自专栏ChaMd5安全团队
RCTF WriteUp(Web篇+PWN篇)
heap)); set_head (top (av), (heap->size - sizeof (*heap)) | PREV_INUSE); /* Setup fencepost free the old top chunk with a multiple of MALLOC_ALIGNMENT in size. */ /* The fencepost
2K30发布于 2019-06-02
来自专栏蓝天
arean.c
prev_heap, prev_heap->size - (MINSIZE-2*SIZE_SZ)); assert(p->size == (0|PREV_INUSE)); /* must be fencepost
87030发布于 2019-03-14
来自专栏蓝天
malloc.c
(*heap)); set_head(top(av), (heap->size - sizeof(*heap)) | PREV_INUSE); /* Setup fencepost and free the old top chunk. */ /* The fencepost takes at least MINSIZE bytes, because it might Insert a double fencepost at old_top to prevent consolidation with space we don't We need the fencepost, even if old_top otherwise gets lost. */ chunk_at_offset
5.4K20发布于 2019-03-14