[Bug binutils/27779] New: SEGV on parse_gnu_debuglink()

[2060909445 at qq dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27779

            Bug ID: 27779
           Summary: SEGV on parse_gnu_debuglink()
           Product: binutils
           Version: 2.36.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: 2060909445 at qq dot com
  Target Milestone: ---

Created attachment 13400
  --> https://sourceware.org/bugzilla/attachment.cgi?id=13400&action=edit
objdump crash

environment: binutils 2.36.50.20210426 on centos linux 7.7.1908
command: objdump -D PoC

information below from asan:
ASAN:DEADLYSIGNAL
=================================================================
==29822==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x000000000000 bp 0x7fff555aa340 sp 0x7fff555aa318 T0)
==29822==Hint: pc points to the zero page.
==29822==The signal is caused by a READ memory access.
==29822==Hint: address points to the zero page.

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV (<unknown module>) 
==29822==ABORTING

information below from valgrind:
==11147== Memcheck, a memory error detector
==11147== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==11147== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==11147== Command: /root/target_programs/binutils-gdb/program/objdump -D
./crash/id:000000,sig:11,src:1345252670,op:flip2,pos:7
==11147== 

==11147== Jump to the invalid address stated on the next line
==11147==    at 0x0: ???
==11147==    by 0x46C28E: parse_gnu_debuglink (dwarf.c:10964)
==11147==    by 0x46C28E: load_separate_debug_info (dwarf.c:11110)
==11147==    by 0x46C28E: check_for_and_load_links (dwarf.c:11415)
==11147==    by 0x4E6A9A: load_separate_debug_files (dwarf.c:11531)
==11147==    by 0x42C3FA: dump_bfd (objdump.c:4815)
==11147==    by 0x42E6D4: display_object_bfd (objdump.c:5001)
==11147==    by 0x40F6F6: display_file (objdump.c:5112)
==11147==    by 0x40F6F6: main (objdump.c:5462)
==11147==  Address 0x0 is not stack'd, malloc'd or (recently) free'd
==11147== 
==11147== 
==11147== Process terminating with default action of signal 11 (SIGSEGV)
==11147==  Bad permissions for mapped region at address 0x0
==11147==    at 0x0: ???
==11147==    by 0x46C28E: parse_gnu_debuglink (dwarf.c:10964)
==11147==    by 0x46C28E: load_separate_debug_info (dwarf.c:11110)
==11147==    by 0x46C28E: check_for_and_load_links (dwarf.c:11415)
==11147==    by 0x4E6A9A: load_separate_debug_files (dwarf.c:11531)
==11147==    by 0x42C3FA: dump_bfd (objdump.c:4815)
==11147==    by 0x42E6D4: display_object_bfd (objdump.c:5001)
==11147==    by 0x40F6F6: display_file (objdump.c:5112)
==11147==    by 0x40F6F6: main (objdump.c:5462)
==11147== 
==11147== HEAP SUMMARY:
==11147==     in use at exit: 78,130 bytes in 33 blocks
==11147==   total heap usage: 105 allocs, 72 frees, 342,311 bytes allocated
==11147== 
==11147== LEAK SUMMARY:
==11147==    definitely lost: 0 bytes in 0 blocks
==11147==    indirectly lost: 0 bytes in 0 blocks
==11147==      possibly lost: 0 bytes in 0 blocks
==11147==    still reachable: 78,130 bytes in 33 blocks
==11147==         suppressed: 0 bytes in 0 blocks
==11147== Rerun with --leak-check=full to see details of leaked memory
==11147== 
==11147== For lists of detected and suppressed errors, rerun with: -s
==11147== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

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