[Bug binutils/25362] New: memory leak in nm, bfd_malloc

[featherrain26 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25362

            Bug ID: 25362
           Summary: memory leak in nm, bfd_malloc
           Product: binutils
           Version: 2.32
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: featherrain26 at gmail dot com
  Target Milestone: ---

Created attachment 12183
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12183&action=edit
POC file

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

run:
./nm-new -C -a -l --synthetic poc

Here is the error message:

=================================================================
==19825==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 0x44075f in bfd_malloc
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x44075f)
    #2 0x4b3d9b in _bfd_x86_elf_get_synthetic_symtab
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x4b3d9b)
    #3 0x649790 in elf_i386_get_synthetic_symtab
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x649790)
    #4 0x40a137 in display_rel_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40a137)
    #5 0x40b1df in display_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40b1df)
    #6 0x40db2a in main
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40db2a)
    #7 0x7ffff5baf82f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

Direct leak of 64 byte(s) in 1 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x7fbefb in xmalloc
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x7fbefb)
    #2 0x409f2e in display_rel_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x409f2e)
    #3 0x40b1df in display_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40b1df)
    #4 0x40db2a in main
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40db2a)
    #5 0x7ffff5baf82f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

Direct leak of 56 byte(s) in 2 object(s) allocated from:
    #0 0x7ffff6f02602 in malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.2+0x98602)
    #1 0x44075f in bfd_malloc
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x44075f)
    #2 0x647acb in elf_i386_get_synthetic_symtab
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x647acb)
    #3 0x40a137 in display_rel_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40a137)
    #4 0x40b1df in display_file
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40b1df)
    #5 0x40db2a in main
(/playground/playground/binutils-2.32-r/binutils-2.32/binutils/nm-new+0x40db2a)
    #6 0x7ffff5baf82f in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

SUMMARY: AddressSanitizer: 4294967464 byte(s) leaked in 4 allocation(s).

Regards,

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