[Bug binutils/30891] New: objdump: SEGV /home/pt/sytseng/binutils-gdb-asan/bfd/elf.c:9543 in _bfd_elf_slurp_version_tables

[yan.cs10 at nycu dot edu.tw]

https://sourceware.org/bugzilla/show_bug.cgi?id=30891

            Bug ID: 30891
           Summary: objdump: SEGV
                    /home/pt/sytseng/binutils-gdb-asan/bfd/elf.c:9543 in
                    _bfd_elf_slurp_version_tables
           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 15130
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15130&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_25

AddressSanitizer report:

$ /home/pt/sytseng/binutils-gdb-asan/binutils/objdump -T ./poc_25

BFD: warning: ./pocs/poc_25 has a program header with invalid alignment
/home/pt/sytseng/binutils-gdb-asan/binutils/objdump: option -P/--private not
supported by this file
AddressSanitizer:DEADLYSIGNAL
=================================================================
==2535506==ERROR: AddressSanitizer: SEGV on unknown address 0x00000000002c (pc
0x55dca2fc8ff3 bp 0x7ffcc79f0d30 sp 0x7ffcc79f0b40 T0)
==2535506==The signal is caused by a READ memory access.
==2535506==Hint: address points to the zero page.
    #0 0x55dca2fc8ff2 in _bfd_elf_slurp_version_tables
/home/pt/sytseng/binutils-gdb-asan/bfd/elf.c:9543
    #1 0x55dca2f7f805 in bfd_elf64_slurp_symbol_table
/home/pt/sytseng/binutils-gdb-asan/bfd/elfcode.h:1278
    #2 0x55dca2fc722d in _bfd_elf_canonicalize_dynamic_symtab
/home/pt/sytseng/binutils-gdb-asan/bfd/elf.c:9285
    #3 0x55dca2db2e96 in slurp_dynamic_symtab objdump.c:1051
    #4 0x55dca2dc93e0 in dump_bfd objdump.c:5656
    #5 0x55dca2dc98cd in display_object_bfd objdump.c:5750
    #6 0x55dca2dc9c05 in display_any_bfd objdump.c:5837
    #7 0x55dca2dc9c7f in display_file objdump.c:5858
    #8 0x55dca2dcb633 in main objdump.c:6269
    #9 0x7fb063965082 in __libc_start_main ../csu/libc-start.c:308
    #10 0x55dca2daf37d 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:9543 in
_bfd_elf_slurp_version_tables
==2535506==ABORTING

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