Getting this error really frequently when querying a Mistral-based model: ValueError: Double free! PhysicalTokenBlock(device=Device.GPU, block_number=9180, ref_count=0) is already freed. Interestingly, it primarily happens when I'm hitti...
at ../sysdeps/posix/libc_fatal.c:181 #3 0x00007f0622756fdc in malloc_printerr (str=str@entry=0x7f062284afc0 "double free or corruption (fasttop)") at malloc.c:5449 #4 0x00007f0622758cbd in _int_free (av=0x7f05e4000020, p=0x7f05e4008db0, have_lock=<optimized out>) at malloc.c...
之后再将chunk 6 free一次,造成double-free,触发unlink向后合并 Delete(6) 由于我们已经设置了fd和bk,unlink成功,最终bss中保存chunk 5堆块地址 heap_5 处变为 heap_5 - 0x18,如下图 于是我们编辑堆块5将保存堆块4地址的bss处覆盖为free_hook地址 Change(5,17,p64(0)+p64(free_hook_addr)) 再编辑堆...
最近在研究一些堆上面的漏洞。然后某一天骑自行车在路上跑的时候我突然悟出了Double Free的真谛。 2333好像太中二了一点,我是根据堆溢出的利用方法启…
(av,idx);/* Atomically link P to its fastbin: P->FD = *FB; *FB = P; */mchunkptrold=*fb;// 这里省略部分代码/* Check that the top of the bin is not the record we are going toadd (i.e., double free). */if(__builtin_expect(old==p,0))malloc_printerr("double free or...
思路分析:多线程,存在double free 漏洞,所以可以先申请一个0x80 的chunk0,释放后show (chunk0),泄露libc 地址,然后利用double free 实现任意地址写,然后修改__malloc_hook 为execue。 1.泄露libc 地址 add(0x80,'abc')delete(0)show(0)p.recvuntil("[*]note[0]:\n")address=u64(p.recvuntil("\n",...
堆内存double free问题分析报告 【NE现场】 pid: 1044, tid: 1073, name: Binder_1 >>> com.android.systemui <<< signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x543dc400 r0 543dc3f4 r1 20ed7351 r2 00011ff8 r3 aaaaaaab
程序执行崩溃并报错 double free,根本原因是对同一内存地址调用了多次的 free 或 delete 执行释放,这会导致应用的内存管理数据结构被损坏,甚至会允许恶意用户在内存任意区域写入数据。这类损坏会导致程序崩溃或者程序的部分执行流程被改变。如果攻击者这个时候特意覆盖特定的寄存器或者内存区域来引导执行他们的代码,进而可以...
高尔夫没有这个free。漏洞原理Double Free其实就是一种在free时利用伪造chunk并且欺骗操作系统。你好
Since "double free" error mean that the same memory is freed twice consecutively I looked but I couldn't find more than instance one offree(lesskey_file);inlesskey_parse.c. But removingline 620 that was added hereavoids the problem. ...