malloc_printerr ("corrupted size vs. prev_size"); \ FD = P->fd; \ BK = P->bk; \ // 防止攻击者简单篡改空闲的 chunk 的 fd 与 bk 来实现任意写的效果。 if (__builtin_expect (FD->bk != P || BK->fd != P, 0)) \ malloc_printerr (check_action, "corrupted double-linked li...
if (__glibc_unlikely (bck->fd != victim)|| __glibc_unlikely (victim->fd != unsorted_chunks (av)))malloc_printerr ("malloc(): unsorted double linked list corrupted"); 检查当前chunk是否是free的,通过next chunk的p值: /* 如果 next c...
unlink 宏,完整的源码: #defineunlink(AV, P, BK, FD) { \FD = P->fd; \BK = P->bk; \if(__builtin_expect (FD->bk != P || BK->fd != P, 0)) \malloc_printerr (check_action,"corrupted double-linked list", P, AV); \else{ \FD->bk = BK; \BK->fd = FD; \if(!in_...
)) malloc_printerr ("corrupted double-linked list"); else { FD->bk = BK; BK->fd = FD; 具体操作如下:检查当前 chunk 的 size 字段与它相邻的下一块 chunk 中记录的 pre_size 是否一样,如果不一样,就报 corrupted size vs. prev_size 的错误。
(): unsorted double linked list corrupted error: the following command terminated unexpectedly: /home/din/zig/zig/build/zig2 build-exe --stack 33554432 /home/din/zig/zig/build/zigcpp/libzigcpp.a /usr/lib/llvm-19/lib/libclang-cpp.so.19.1 /usr/lib/llvm-19/lib/liblldMinGW.a /usr/lib/...
malloc_printerr ("malloc(): smallbin double linked list corrupted"); set_inuse_bit_at_offset (victim, nb); //将victim设置为已使用状态 bin->bk = bck; //将bin->bk设置为bck bck->fd = bin; //将bck->fd设置为bin if (av != &main_arena) ...
= fwd)) malloc_printerr ("malloc(): largebin double linked list corrupted (nextsize)"); fwd->bk_nextsize = victim; victim->bk_nextsize->fd_nextsize = victim; } bck = fwd->bk; if (bck->fd != fwd) malloc_printerr ("malloc(): largebin double linked list corrupted (bk)"); }...
errstr = "malloc(): smallbin double linked list corrupted"; goto errout; } set_inuse_bit_at_offset(victim, nb); bin->bk = bck; bck->fd = bin; if (av != &main_arena) victim->size |= NON_MAIN_ARENA; check_malloced_chunk(av, victim, nb); ...
errstr = "malloc(): smallbin double linked list corrupted"; goto errout; } set_inuse_bit_at_offset(victim, nb); bin->bk = bck; bck->fd = bin; if (av != &main_arena) victim->size |= NON_MAIN_ARENA; check_malloced_chunk(av, victim, nb); ...
errstr ="malloc(): smallbin double linked list corrupted";gotoerrout; }// 设置 victim 对应的 inuse 位set_inuse_bit_at_offset(victim, nb);// 修改 small bin 链表,将 small bin 的最后一个 chunk 取出来bin->bk = bck; bck->fd = bin;// 如果不是 main_arena,设置对应的标志if(av != ...