[Bug binutils/28163] New: Segment fault on `objdump -S`due to function rl78_special_reloc in elf32-rl78.c

[shaohua.li at inf dot ethz.ch]

https://sourceware.org/bugzilla/show_bug.cgi?id=28163

            Bug ID: 28163
           Summary: Segment fault on `objdump -S`due to function
                    rl78_special_reloc in elf32-rl78.c
           Product: binutils
           Version: 2.38 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: shaohua.li at inf dot ethz.ch
  Target Milestone: ---

Created attachment 13574
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13574&action=edit
poc

Hi there,

I crashed `objdump -S` with a fuzzer.

- binutils version: 2.38(Head), commit af51804103a08cd1e12edc4f4a30eec2c5c4f9e8
- Compiler: clang12
- Platform: Ubuntu 18.04.5 LTS, x86_64
- Reproduce: run `objdump -S poc`


AddressSanitizer report:

=================================================================
==160==ERROR: AddressSanitizer: SEGV on unknown address 0x60e0007478b4 (pc
0x000001705f55 bp 0x7ffda549d5d0 sp 0x7ffda549d2d0 T0)
==160==The signal is caused by a WRITE memory access.
    #0 0x1705f55 in rl78_special_reloc
/binutils_latest/repo/bfd/elf32-rl78.c:630:14
    #1 0x1b49a57 in bfd_perform_relocation
/binutils_latest/repo/bfd/reloc.c:711:14
    #2 0x1b4da0f in bfd_generic_get_relocated_section_contents
/binutils_latest/repo/bfd/reloc.c:8463:10
    #3 0xae653f in bfd_get_relocated_section_contents
/binutils_latest/repo/bfd/bfd.c:2166:10
    #4 0xb0fe68 in bfd_simple_get_relocated_section_contents
/binutils_latest/repo/bfd/simple.c:298:14
    #5 0xcab59c in read_section /binutils_latest/repo/bfd/./dwarf2.c:582:7
    #6 0xca8237 in _bfd_dwarf2_slurp_debug_info
/binutils_latest/repo/bfd/./dwarf2.c:4737:13
    #7 0xcac7c1 in _bfd_dwarf2_find_nearest_line
/binutils_latest/repo/bfd/./dwarf2.c:4985:9
    #8 0xbd1379 in _bfd_elf_find_nearest_line
/binutils_latest/repo/bfd/elf.c:9199:7
    #9 0x4e496a in show_line /binutils_latest/repo/binutils/./objdump.c:1784:9
    #10 0x4e0b1f in disassemble_bytes
/binutils_latest/repo/binutils/./objdump.c:2770:6
    #11 0x4dae9a in disassemble_section
/binutils_latest/repo/binutils/./objdump.c:3455:4
    #12 0xb0e04a in bfd_map_over_sections
/binutils_latest/repo/bfd/section.c:1383:5
    #13 0x4d1ae0 in disassemble_data
/binutils_latest/repo/binutils/./objdump.c:3599:3
    #14 0x4cda84 in dump_bfd /binutils_latest/repo/binutils/./objdump.c:5006:5
    #15 0x4ccb9f in display_object_bfd
/binutils_latest/repo/binutils/./objdump.c:5068:7
    #16 0x4ccaa9 in display_any_bfd
/binutils_latest/repo/binutils/./objdump.c:5158:5
    #17 0x4cc65c in display_file
/binutils_latest/repo/binutils/./objdump.c:5179:3
    #18 0x4cb063 in main /binutils_latest/repo/binutils/./objdump.c:5529:6
    #19 0x7f00a5cc70b2 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
    #20 0x41c61d in _start (/out_bin/objdump+0x41c61d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV /binutils_latest/repo/bfd/elf32-rl78.c:630:14
in rl78_special_reloc
==160==ABORTING

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