README.md

utnso@ubuntu-server:~$ gcc -g -o double_free double_free.c
utnso@ubuntu-server:~$ ./double_free
*** Error in `./double_free': double free or corruption (fasttop): 0x09cb8008 ***
======= Backtrace: =========
/lib/i386-linux-gnu/libc.so.6(+0x67377)[0xb75de377]
/lib/i386-linux-gnu/libc.so.6(+0x6d2f7)[0xb75e42f7]
/lib/i386-linux-gnu/libc.so.6(+0x6dc31)[0xb75e4c31]
./double_free[0x8048475]
/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf7)[0xb758f637]
./double_free[0x8048361]
======= Memory map: ========
08048000-08049000 r-xp 00000000 fc:00 1080245    /home/utnso/double_free
08049000-0804a000 r--p 00000000 fc:00 1080245    /home/utnso/double_free
0804a000-0804b000 rw-p 00001000 fc:00 1080245    /home/utnso/double_free
09cb8000-09cd9000 rw-p 00000000 00:00 0          [heap]
b7400000-b7421000 rw-p 00000000 00:00 0
b7421000-b7500000 ---p 00000000 00:00 0
b754e000-b756a000 r-xp 00000000 fc:00 1700661    /lib/i386-linux-gnu/libgcc_s.so.1
b756a000-b756b000 rw-p 0001b000 fc:00 1700661    /lib/i386-linux-gnu/libgcc_s.so.1
b7576000-b7577000 rw-p 00000000 00:00 0
b7577000-b7727000 r-xp 00000000 fc:00 1705948    /lib/i386-linux-gnu/libc-2.23.so
b7727000-b7729000 r--p 001af000 fc:00 1705948    /lib/i386-linux-gnu/libc-2.23.so
b7729000-b772a000 rw-p 001b1000 fc:00 1705948    /lib/i386-linux-gnu/libc-2.23.so
b772a000-b772d000 rw-p 00000000 00:00 0
b7737000-b7739000 rw-p 00000000 00:00 0
b7739000-b773b000 r--p 00000000 00:00 0          [vvar]
b773b000-b773c000 r-xp 00000000 00:00 0          [vdso]
b773c000-b775f000 r-xp 00000000 fc:00 1705946    /lib/i386-linux-gnu/ld-2.23.so
b775f000-b7760000 r--p 00022000 fc:00 1705946    /lib/i386-linux-gnu/ld-2.23.so
b7760000-b7761000 rw-p 00023000 fc:00 1705946    /lib/i386-linux-gnu/ld-2.23.so
bfaa9000-bfaca000 rw-p 00000000 00:00 0          [stack]
Aborted (core dumped)

double_free.c

#include <stdlib.h>

int main(void) {
	void *memory = malloc(10);
	free(memory);
	free(memory);
	return 0;
}