[Bug binutils/30901] New: objdump: SEGV at bfd/elf.c:2267 in _bfd_elf_get_dynamic_symbols

[yan.cs10 at nycu dot edu.tw]

https://sourceware.org/bugzilla/show_bug.cgi?id=30901

            Bug ID: 30901
           Summary: objdump: SEGV at bfd/elf.c:2267 in
                    _bfd_elf_get_dynamic_symbols
           Product: binutils
           Version: 2.42 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: yan.cs10 at nycu dot edu.tw
  Target Milestone: ---

Created attachment 15134
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15134&action=edit
this poc with -T argument can crash objdump in the latest version

Summary:

A crash caused when using objdump
AddressSanitizer reported it as SEGV

git commit, OS, Compiler and processor

git commit: be8e83130
gcc (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
g++ (Ubuntu 9.4.0-1ubuntu1~20.04.2) 9.4.0
Ubuntu 20.04.4 LTS
AMD Ryzen 5 3600X 6-Core Processor

Steps to reproduce:

$ cd binutils-gdb
$ export CFLAGS='-fsanitize=address -fsanitize-recover=address -g3'
$ export CXXFLAGS='-fsanitize=address -fsanitize-recover=address -g3'
$ make
$ binutils/objdump -T ./poc_55_hav

AddressSanitizer report:

$ /home/pt/sytseng/binutils-gdb-asan/binutils/objdump -T ./pocs/poc_55_hav

id:000050,sig:11,seed:000000,src:012011,op:havoc,rep:32
AddressSanitizer:DEADLYSIGNAL
=================================================================
==1073912==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x55b97a4b0808 bp 0x7ffdb7ac8bb0 sp 0x7ffdb7ac8900 T0)
==1073912==The signal is caused by a READ memory access.
==1073912==Hint: address points to the zero page.
    #0 0x55b97a4b0807 in _bfd_elf_get_dynamic_symbols
/home/pt/sytseng/binutils-gdb-asan/bfd/elf.c:2267
    #1 0x55b97a4967a5 in bfd_elf64_object_p
/home/pt/sytseng/binutils-gdb-asan/bfd/elfcode.h:861
    #2 0x55b97a4221fe in bfd_check_format_matches
/home/pt/sytseng/binutils-gdb-asan/bfd/format.c:431
    #3 0x55b97a2e38b5 in display_object_bfd objdump.c:5748
    #4 0x55b97a2e3c05 in display_any_bfd objdump.c:5837
    #5 0x55b97a2e3c7f in display_file objdump.c:5858
    #6 0x55b97a2e5633 in main objdump.c:6269
    #7 0x7f39b2247082 in __libc_start_main ../csu/libc-start.c:308
    #8 0x55b97a2c937d in _start
(/home/pt/sytseng/binutils-gdb-asan/binutils/objdump+0x13737d)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/home/pt/sytseng/binutils-gdb-asan/bfd/elf.c:2267 in
_bfd_elf_get_dynamic_symbols
==1073912==ABORTING

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