[Bug binutils/27799] New: [size] heap-buffer-overflow on bfd/libbfd.c:548

[dkcjd2000 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27799

            Bug ID: 27799
           Summary: [size] heap-buffer-overflow on bfd/libbfd.c:548
           Product: binutils
           Version: 2.37 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: dkcjd2000 at gmail dot com
  Target Milestone: ---

Created attachment 13411
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13411&action=edit
crash test case

Hello,
I report a double free detected by address sanitizer.
I found this test input by fuzz testing.

The stack traces are as follows:
==22808==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x6070000000d5 at pc 0x0000004fab69 bp 0x7fffffffcd40 sp 0x7fffffffcd38READ of
size 1 at 0x6070000000d5 thread T0'
    #0 0x4fab68 in bfd_getl16 .../subjects/binutils-gdb/bfd/libbfd.c:548:11'
    #1 0x13b486a in elf_xtensa_grok_prstatus
.../subjects/binutils-gdb/bfd/elf32-xtensa.c:3747:36'
    #2 0x5fffa3 in elfcore_grok_note
.../subjects/binutils-gdb/bfd/elf.c:10326:6'
    #3 0x59bfd9 in elf_parse_notes
.../subjects/binutils-gdb/bfd/elf.c:12205:13'
    #4 0x5affba in elf_read_notes .../subjects/binutils-gdb/bfd/elf.c:12254:8'
    #5 0x721d07 in _bfd_elf32_core_find_build_id
.../subjects/binutils-gdb/bfd/./elfcore.h:411:4'
    #6 0x5afe93 in _bfd_elf_core_find_build_id
.../subjects/binutils-gdb/bfd/elf.c:3030:12'
    #7 0x5af9a9 in bfd_section_from_phdr
.../subjects/binutils-gdb/bfd/elf.c:3049:2'
    #8 0x720ed1 in bfd_elf32_core_file_p
.../subjects/binutils-gdb/bfd/./elfcore.h:285:11'
    #9 0x4f402a in bfd_check_format_matches
.../subjects/binutils-gdb/bfd/format.c:343:17'
    #10 0x4c6ce6 in display_bfd
.../subjects/binutils-gdb/binutils/size.c:345:7'
    #11 0x4c6824 in display_file
.../subjects/binutils-gdb/binutils/size.c:432:5'
    #12 0x4c6412 in main .../subjects/binutils-gdb/binutils/size.c:258:7'
    #13 0x7ffff6e22bf6 in __libc_start_main
/build/glibc-S9d2JN/glibc-2.27/csu/../csu/libc-start.c:310'
    #14 0x41be59 in _start (.../subjects_asan/size/size.san+0x41be59)'

You can reproduce the bug by executing
./size <test input>

I tested the subject on the latest version uploaded on git,
build with --disable-shared --disable-gdb --disable-libdecnumber --disable-ld
--enable-targets=all
configure options.

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