[Bug binutils/30366] New: [Objdump] Use of uninitialised value at debug.c

[ziqiaokong at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30366

            Bug ID: 30366
           Summary: [Objdump] Use of uninitialised value at debug.c
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: ziqiaokong at gmail dot com
  Target Milestone: ---

Created attachment 14834
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14834&action=edit
Both the full logs and object file

Git commit hash: 93c6e8c3c14bf81020ca7571fe752250a34f5bc9

Steps to reproduce:

```
./configure
make -j
valgrind --leak-check=full --tool=memcheck ./binutils/objdump -D /path/to/obj 
```

Valgrind output:

```
==535411== Memcheck, a memory error detector
==535411== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==535411== Using Valgrind-3.18.1 and LibVEX; rerun with -h for copyright info
==535411== Command: /binutils/binutils/objdump -g
objdump-eval3-msan/msanchild91/crashes/id:000000,sig:09,src:024180,time:62208140,execs:
8755175,op:havoc,rep:4,+san
==535411==
==535411== Conditional jump or move depends on uninitialised value(s)
==535411==    at 0x19936F: debug_class_type_samep (debug.c:3273)
==535411==    by 0x19936F: debug_type_samep (debug.c:3090)
==535411==    by 0x19988E: debug_set_class_id (debug.c:2973)
==535411==    by 0x19A165: debug_write_type (debug.c:2508)
==535411==    by 0x199C09: debug_write_type (debug.c:2539)
==535411==    by 0x199FC7: debug_write_type (debug.c:2562)
==535411==    by 0x19A57E: debug_write_name (debug.c:2378)
==535411==    by 0x19C9A8: debug_write (debug.c:2350)
==535411==    by 0x19802D: print_debugging_info (prdbg.c:296)
==535411==    by 0x16A6F9: dump_bfd (objdump.c:5693)
==535411==    by 0x16B43C: display_object_bfd (objdump.c:5744)
==535411==    by 0x16B43C: display_any_bfd (objdump.c:5831)
==535411==    by 0x16B4F2: display_file (objdump.c:5852)
==535411==    by 0x16B4F2: display_file (objdump.c:5835)
==535411==    by 0x165C17: main (objdump.c:6263)
==535411==
==535411== Conditional jump or move depends on uninitialised value(s)
==535411==    at 0x19768B: pr_struct_field (prdbg.c:1118)
==535411==    by 0x19768B: pr_struct_field (prdbg.c:1105)
==535411==    by 0x199C2B: debug_write_type (debug.c:2541)
==535411==    by 0x199C09: debug_write_type (debug.c:2539)
==535411==    by 0x199FC7: debug_write_type (debug.c:2562)
==535411==    by 0x19A57E: debug_write_name (debug.c:2378)
==535411==    by 0x19C9A8: debug_write (debug.c:2350)
==535411==    by 0x19802D: print_debugging_info (prdbg.c:296)
==535411==    by 0x16A6F9: dump_bfd (objdump.c:5693)
==535411==    by 0x16B43C: display_object_bfd (objdump.c:5744)
==535411==    by 0x16B43C: display_any_bfd (objdump.c:5831)
==535411==    by 0x16B4F2: display_file (objdump.c:5852)
==535411==    by 0x16B4F2: display_file (objdump.c:5835)
==535411==    by 0x165C17: main (objdump.c:6263)
==535411==
<See attached full logs>
```

System environment:

```
[afl++ amdsuplus3] /work/tmpfs # gcc --version
gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[afl++ amdsuplus3] /work/tmpfs # g++ --version
g++ (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[afl++ amdsuplus3] /work/tmpfs # cat /etc/issue
Ubuntu 22.04.2 LTS \n \l

[afl++ amdsuplus3] /work/tmpfs # uname -a
Linux amdsuplus3.inf.ethz.ch 5.4.0-146-generic #163-Ubuntu SMP Fri Mar 17
18:26:02 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
[afl++ amdsuplus3] /work/tmpfs #
```

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