[Bug binutils/25364] memory leak objdump

[featherrain26 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25364

--- Comment #1 from featherrain26 at gmail dot com ---
Hi, there.

There is a memory leak in file binutils/nm.c, get_data function.

Here is the reproducing environment and procedure:

Distributor ID: Ubuntu
Description:    Ubuntu 16.04.6 LTS
Release:        16.04
Codename:       xenial
gcc:            5.4.0

compilation:
CFLAGS="-fsanitize=address,undefined" ./configure

./objdump -D poc

Here is the error message:

=================================================================
==78623==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 4294967344 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x507d27 in bfd_malloc
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x507d27)
    #2 0x57c88a in _bfd_x86_elf_get_synthetic_symtab
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x57c88a)
    #3 0x71227f in elf_i386_get_synthetic_symtab
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x71227f)
    #4 0x41e501 in dump_bfd
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41e501)
    #5 0x41e926 in display_object_bfd
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41e926)
    #6 0x41eebf in display_any_bfd
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41eebf)
    #7 0x41ef36 in display_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41ef36)
    #8 0x4201a2 in main
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x4201a2)
    #9 0x7ffff5baf82f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

Direct leak of 48 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x507d27 in bfd_malloc
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x507d27)
    #2 0x7105ba in elf_i386_get_synthetic_symtab
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x7105ba)
    #3 0x41e501 in dump_bfd
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41e501)
    #4 0x41e926 in display_object_bfd
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41e926)
    #5 0x41eebf in display_any_bfd
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41eebf)
    #6 0x41ef36 in display_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x41ef36)
    #7 0x4201a2 in main
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/objdump+0x4201a2)
    #8 0x7ffff5baf82f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: 4294967392 byte(s) leaked in 2 allocation(s).

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