Created attachment 11468 [details]
POC1

Hi there,

A memory leak issue was discovered in debug.c, as distributed in GNU Binutils 2.31. 
In debug_init function in debug.c, the is a heap allocation. But this heap allocation didn't deallocate in the end. The source Code show as follow.

> void *
> debug_init (void)
> {
>   struct debug_handle *ret;
> 
>   ret = (struct debug_handle *) xmalloc (sizeof *ret);
>   memset (ret, 0, sizeof *ret);
>   return (void *) ret;
> }

Please use the "./objdump -xg $POC" to reproduce the bug.
To reproduce this bug. You need to build bintuils-2.31 with ASAN, setting following Command:

> export ASAN_OPTIONS=abort_on_error=1:symbolize=1:detect_leaks=1


The Leak Sanitizer dumps the stack trace as follows:

> =================================================================
> ==12163==ERROR: LeakSanitizer: detected memory leaks
> 
> Direct leak of 96 byte(s) in 1 object(s) allocated from:
>     #0 0x7fcb75396602 in malloc (/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
>     #1 0x8f925b in xmalloc xmalloc.c:147
>     #2 0x4734b9 in debug_init /binutils-2.31_ASAN/binutils/debug.c:666
>     #3 0x47014b in read_debugging_info /binutils-2.31_ASAN/binutils/rddbg.c:51
>     #4 0x41e02c in dump_bfd objdump.c:3637
>     #5 0x41e30e in display_object_bfd objdump.c:3688
>     #6 0x41e89c in display_any_bfd objdump.c:3777
>     #7 0x41e936 in display_file objdump.c:3798
>     #8 0x41fb25 in main objdump.c:4100
>     #9 0x7fcb7404382f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
> 
> SUMMARY: AddressSanitizer: 96 byte(s) leaked in 1 allocation(s).