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* [Bug gdb/30706] New: dynamic-stack-buffer-overflow /home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-lang.c:1391 in ada_decode[abi:cxx11](char const*, bool, bool)
@ 2023-07-31 12:00 sihan2021 at iscas dot ac.cn
2023-08-01 15:10 ` [Bug gdb/30706] " tromey at sourceware dot org
0 siblings, 1 reply; 2+ messages in thread
From: sihan2021 at iscas dot ac.cn @ 2023-07-31 12:00 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=30706
Bug ID: 30706
Summary: dynamic-stack-buffer-overflow
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-l
ang.c:1391 in ada_decode[abi:cxx11](char const*, bool,
bool)
Product: gdb
Version: 13.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: gdb
Assignee: unassigned at sourceware dot org
Reporter: sihan2021 at iscas dot ac.cn
Target Milestone: ---
Created attachment 15026
--> https://sourceware.org/bugzilla/attachment.cgi?id=15026&action=edit
crash seed
Hello, developers of gdb, we recently ran some fuzz on gdb 13.1 and find a
stack-buffer-overflow bug. Here is the description of this bug. I hope this
can accsit you to solve this bug.
Version:
gdb 13.1 (compile with ASAN)
ubuntu 20.04
Command to reproduce:
gdb dsbo
ASAN report:
==3117258==ERROR: AddressSanitizer: dynamic-stack-buffer-overflow on address
0x7ffd4744605f at pc 0x55c23d0564a0 bp 0x7ffd47445bc0 sp 0x7ffd47445bb0
READ of size 1 at 0x7ffd4744605f thread T0
#0 0x55c23d05649f in ada_decode[abi:cxx11](char const*, bool, bool)
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-lang.c:1391
#1 0x55c23d099aff in ada_language::sniff_from_mangled_name(char const*,
std::unique_ptr<char, gdb::xfree_deleter<char> >*) const
(/home/root/gdb/binutils-gdb-gdb-13.1-release/install/bin/gdb+0xba3aff)
#2 0x55c23de773b7 in symbol_find_demangled_name(general_symbol_info*, char
const*) /home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symtab.c:892
#3 0x55c23de77c84 in
general_symbol_info::compute_and_set_names(gdb::basic_string_view<char,
std::char_traits<char> >, bool, objfile_per_bfd_storage*,
gdb::optional<unsigned int>)
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symtab.c:980
#4 0x55c23d3b7927 in process_coff_symbol
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/coffread.c:1572
#5 0x55c23d3b55b0 in coff_symtab_read
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/coffread.c:1184
#6 0x55c23d3b1da4 in coff_read_minsyms
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/coffread.c:554
#7 0x55c23d3b2c07 in coff_symfile_read
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/coffread.c:703
#8 0x55c23de3e421 in read_symbols
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:773
#9 0x55c23de3f38a in syms_from_objfile_1
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:968
#10 0x55c23de3f5f9 in syms_from_objfile
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:985
#11 0x55c23de404f6 in symbol_file_add_with_addrs
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:1088
#12 0x55c23de411fd in symbol_file_add_from_bfd(gdb::ref_ptr<bfd,
gdb_bfd_ref_policy> const&, char const*, enum_flags<symfile_add_flag>,
std::vector<other_sections, std::allocator<other_sections> >*,
enum_flags<objfile_flag>, objfile*)
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:1168
#13 0x55c23de413a2 in symbol_file_add(char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>)
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:1181
#14 0x55c23de4170c in symbol_file_add_main_1
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:1205
#15 0x55c23de41558 in symbol_file_add_main(char const*,
enum_flags<symfile_add_flag>)
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symfile.c:1196
#16 0x55c23d9cb8cf in symbol_file_add_main_adapter
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/main.c:540
#17 0x55c23d9cb6bf in catch_command_errors
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/main.c:513
#18 0x55c23d9ce58a in captured_main_1
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/main.c:1213
#19 0x55c23d9cf48f in captured_main
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/main.c:1320
#20 0x55c23d9cf530 in gdb_main(captured_main_args*)
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/main.c:1345
#21 0x55c23cff8eb1 in main
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/gdb.c:32
#22 0x7f08cb9e3082 in __libc_start_main ../csu/libc-start.c:308
#23 0x55c23cff8c8d in _start
(/home/root/gdb/binutils-gdb-gdb-13.1-release/install/bin/gdb+0xb02c8d)
Address 0x7ffd4744605f is located in stack of thread T0 at offset 191 in frame
#0 0x55c23de7712e in symbol_find_demangled_name(general_symbol_info*, char
const*) /home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/symtab.c:872
This frame has 1 object(s):
[32, 40) 'demangled' (line 873) <== Memory access at offset 191 overflows
this variable
HINT: this may be a false positive if your program uses some custom stack
unwind mechanism, swapcontext or vfork
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: dynamic-stack-buffer-overflow
/home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-lang.c:1391 in
ada_decode[abi:cxx11](char const*, bool, bool)
Shadow bytes around the buggy address:
0x100028e80bb0: f2 f2 f2 f2 00 00 00 00 f2 f2 f2 f2 00 00 00 00
0x100028e80bc0: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
0x100028e80bd0: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 f3 f3 f3 f3
0x100028e80be0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x100028e80bf0: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
=>0x100028e80c00: 00 00 00 00 00 00 00 00 ca ca ca[ca]03 cb cb cb
0x100028e80c10: cb cb cb cb 00 00 00 00 00 00 00 00 00 00 00 00
0x100028e80c20: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x100028e80c30: f1 f1 f8 f2 00 f2 f2 f2 00 f2 f2 f2 00 00 f2 f2
0x100028e80c40: f8 f8 f2 f2 00 00 f2 f2 00 00 f2 f2 00 00 f2 f2
0x100028e80c50: 00 00 00 00 f3 f3 f3 f3 00 00 00 00 00 00 00 00
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* [Bug gdb/30706] dynamic-stack-buffer-overflow /home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-lang.c:1391 in ada_decode[abi:cxx11](char const*, bool, bool)
2023-07-31 12:00 [Bug gdb/30706] New: dynamic-stack-buffer-overflow /home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-lang.c:1391 in ada_decode[abi:cxx11](char const*, bool, bool) sihan2021 at iscas dot ac.cn
@ 2023-08-01 15:10 ` tromey at sourceware dot org
0 siblings, 0 replies; 2+ messages in thread
From: tromey at sourceware dot org @ 2023-08-01 15:10 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=30706
Tom Tromey <tromey at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tromey at sourceware dot org
--- Comment #1 from Tom Tromey <tromey at sourceware dot org> ---
I wonder if COFF debug info is even relevant any more.
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2023-07-31 12:00 [Bug gdb/30706] New: dynamic-stack-buffer-overflow /home/root/gdb/binutils-gdb-gdb-13.1-release/gdb/ada-lang.c:1391 in ada_decode[abi:cxx11](char const*, bool, bool) sihan2021 at iscas dot ac.cn
2023-08-01 15:10 ` [Bug gdb/30706] " tromey at sourceware dot org
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