[Bug binutils/28423] New: use-after-free in objdump at disassemble_bytes objdump.c:3059

[irfanariq at kaist dot ac.kr]

https://sourceware.org/bugzilla/show_bug.cgi?id=28423

            Bug ID: 28423
           Summary: use-after-free in objdump at disassemble_bytes
                    objdump.c:3059
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: irfanariq at kaist dot ac.kr
  Target Milestone: ---

Created attachment 13706
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13706&action=edit
poc and full stack trace

Hello,

We are currently working on fuzz testing feature, and we found a
**use-after-free** on `objdump`.

The stack traces are as follow:
```st
==2689==ERROR: AddressSanitizer: heap-use-after-free on address 0x602000000190
at pc 0x560e3bcdef38 bp 0x7ffe07f66680 sp 0x7ffe07f66670
READ of size 8 at 0x602000000190 thread T0
    #0 0x560e3bcdef37 in disassemble_bytes objdump.c:3059
    #1 0x560e3bce1342 in disassemble_section objdump.c:3455
    #2 0x560e3c1ac3c0 in bfd_map_over_sections
.../binutils-git/bfd/section.c:1383
    #3 0x560e3bce2293 in disassemble_data objdump.c:3599
    #4 0x560e3bce96cc in dump_bfd objdump.c:5006
    #5 0x560e3bce9994 in display_object_bfd objdump.c:5068
    #6 0x560e3bce9d2f in display_any_bfd objdump.c:5158
    #7 0x560e3bce9cd9 in display_any_bfd objdump.c:5139
    #8 0x560e3bce9da6 in display_file objdump.c:5179
    #9 0x560e3bceb15a in main objdump.c:5529
```
The full stack trace is attached.

**Step to reproduce**

We configured `objdump` using `CFLAGS="-g -O0 -fsanitize=address" ./configure
--prefix=$(pwd)/ --disable-shared --enable-targets=all` and build it using
`make -j 10`, and run it with:

```
./objdump data16 -marm i8086 64 -Ttext --headers <attached file> ppcps
--debugging --wide --demangle 440 --dwarf --file-offsets --line-numbers
--disassemble nm -d -Wa
```
The input file is attached.

**Environment**
- OS: Ubuntu 18.04.5 LTS
- GCC version: gcc 7.5.0
- binutils version: commit (98ca73a) of master branch on sourceware git
([link](https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=98ca73afe51e1e921915c37f242c88d4d445841c))

Thank you.

-- 
You are receiving this mail because:
You are on the CC list for the bug.