[Bug gdb/30638] New: AddressSanitizer: heap-use-after-free (/home/cmd/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x44aee0) in strrchr

[Bug gdb/30638] New: AddressSanitizer: heap-use-after-free (/home/cmd/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x44aee0) in strrchr

[sihan2021 at iscas dot ac.cn]

https://sourceware.org/bugzilla/show_bug.cgi?id=30638

            Bug ID: 30638
           Summary: AddressSanitizer: heap-use-after-free
                    (/home/cmd/sp/Fuzz/aflpp_fuzz/Binutils/document_group/
                    batch_x/gdb_1/gdb+0x44aee0) in strrchr
           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 14965
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14965&action=edit
crash seed

Hello GDB developers,
We recently conducted a fuzzing test on GDB and discovered a Use-After-Free
(UAF) bug. We would like to provide a detailed description of the bug and seek
your assistance in addressing it.

version:
gdb:GNU gdb (GDB) 13.0.50.20220805-git
gcc:gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
ubuntu: 20.04

command to reproduce:
gdb -x command.gdb UAF_1
UAF_1 is attached to this report
It seems that only one attachment can be added. So I paste the content of
command.gdb below:
# Set breakpoint at beginning of main function
break main

# Run program
run

# Print values of variables when breakpoint is hit
echo "Breakpoint hit!"
info locals
info registers


ASAN report:
=================================================================
==2661285==ERROR: AddressSanitizer: heap-use-after-free on address
0x7fd44bc09800 at pc 0x00000044aee1 bp 0x7fff3d1f5420 sp 0x7fff3d1f4be0
READ of size 1 at 0x7fd44bc09800 thread T0
    #0 0x44aee0 in strrchr
(/home/root/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x44aee0)
    #1 0xb13a0a in read_pe_truncate_name(char*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coff-pe-read.c:252:22
    #2 0xb11912 in read_pe_exported_syms(minimal_symbol_reader&, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coff-pe-read.c:499:3
    #3 0xb1d543 in coff_read_minsyms(long, unsigned int, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coffread.c:548:7
    #4 0xb1abd0 in coff_symfile_read(objfile*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coffread.c:702:3
    #5 0x1bf6a0e in read_symbols(objfile*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:772:3
    #6 0x1c19531 in syms_from_objfile_1(objfile*, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:968:3
    #7 0x1c180fd in syms_from_objfile(objfile*, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:985:3
    #8 0x1be663c in symbol_file_add_with_addrs(bfd*, char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1088:3
    #9 0x1be70b3 in symbol_file_add_from_bfd(bfd*, char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1168:10
    #10 0x1be7459 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/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1181:10
    #11 0x1be873e in symbol_file_add_main_1(char const*,
enum_flags<symfile_add_flag>, enum_flags<objfile_flag>, unsigned long)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1205:29
    #12 0x1be82ea in symbol_file_add_main(char const*,
enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1196:3
    #13 0x15c8b73 in symbol_file_add_main_adapter(char const*, int)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:540:3
    #14 0x15c6d2c in catch_command_errors(void (*)(char const*, int), char
const*, int, bool)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:513:7
    #15 0x15c433a in captured_main_1(captured_main_args*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1212:8
    #16 0x15be28d in captured_main(void*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1319:3
    #17 0x15be058 in gdb_main(captured_main_args*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1344:7
    #18 0x4e4f12 in main
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/gdb.c:32:10
    #19 0x7fd47e6c6082 in __libc_start_main
/build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16
    #20 0x433ebd in _start
(/home/root/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x433ebd)

0x7fd44bc09800 is located 98304 bytes inside of 196608-byte region
[0x7fd44bbf1800,0x7fd44bc21800)
freed by thread T0 here:
    #0 0x4e2c8d in operator delete(void*)
(/home/root/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x4e2c8d)
    #1 0xb182c1 in
__gnu_cxx::new_allocator<read_pe_section_data>::deallocate(read_pe_section_data*,
unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/new_allocator.h:133:2
    #2 0xb18269 in std::allocator_traits<std::allocator<read_pe_section_data>
>::deallocate(std::allocator<read_pe_section_data>&, read_pe_section_data*,
unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/alloc_traits.h:492:13
    #3 0xb18203 in std::_Vector_base<read_pe_section_data,
std::allocator<read_pe_section_data> >::_M_deallocate(read_pe_section_data*,
unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_vector.h:354:4
    #4 0xb1882d in std::vector<read_pe_section_data,
std::allocator<read_pe_section_data> >::_M_default_append(unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:675:8
    #5 0xb13487 in std::vector<read_pe_section_data,
std::allocator<read_pe_section_data> >::resize(unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_vector.h:940:4
    #6 0xb10b1d in read_pe_exported_syms(minimal_symbol_reader&, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coff-pe-read.c:451:17
    #7 0xb1d543 in coff_read_minsyms(long, unsigned int, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coffread.c:548:7
    #8 0xb1abd0 in coff_symfile_read(objfile*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coffread.c:702:3
    #9 0x1bf6a0e in read_symbols(objfile*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:772:3
    #10 0x1c19531 in syms_from_objfile_1(objfile*, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:968:3
    #11 0x1c180fd in syms_from_objfile(objfile*, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:985:3
    #12 0x1be663c in symbol_file_add_with_addrs(bfd*, char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1088:3
    #13 0x1be70b3 in symbol_file_add_from_bfd(bfd*, char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1168:10
    #14 0x1be7459 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/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1181:10
    #15 0x1be873e in symbol_file_add_main_1(char const*,
enum_flags<symfile_add_flag>, enum_flags<objfile_flag>, unsigned long)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1205:29
    #16 0x1be82ea in symbol_file_add_main(char const*,
enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1196:3
    #17 0x15c8b73 in symbol_file_add_main_adapter(char const*, int)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:540:3
    #18 0x15c6d2c in catch_command_errors(void (*)(char const*, int), char
const*, int, bool)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:513:7
    #19 0x15c433a in captured_main_1(captured_main_args*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1212:8
    #20 0x15be28d in captured_main(void*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1319:3
    #21 0x15be058 in gdb_main(captured_main_args*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1344:7
    #22 0x4e4f12 in main
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/gdb.c:32:10
    #23 0x7fd47e6c6082 in __libc_start_main
/build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16

previously allocated by thread T0 here:
    #0 0x4e242d in operator new(unsigned long)
(/home/root/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x4e242d)
    #1 0xb17b62 in
__gnu_cxx::new_allocator<read_pe_section_data>::allocate(unsigned long, void
const*)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/ext/new_allocator.h:115:27
    #2 0xb17a71 in std::allocator_traits<std::allocator<read_pe_section_data>
>::allocate(std::allocator<read_pe_section_data>&, unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/alloc_traits.h:460:20
    #3 0xb179d1 in std::_Vector_base<read_pe_section_data,
std::allocator<read_pe_section_data> >::_M_allocate(unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_vector.h:346:20
    #4 0xb185b7 in std::vector<read_pe_section_data,
std::allocator<read_pe_section_data> >::_M_default_append(unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/vector.tcc:635:34
    #5 0xb13487 in std::vector<read_pe_section_data,
std::allocator<read_pe_section_data> >::resize(unsigned long)
/usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/bits/stl_vector.h:940:4
    #6 0xb10b1d in read_pe_exported_syms(minimal_symbol_reader&, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coff-pe-read.c:451:17
    #7 0xb1d543 in coff_read_minsyms(long, unsigned int, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coffread.c:548:7
    #8 0xb1abd0 in coff_symfile_read(objfile*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/coffread.c:702:3
    #9 0x1bf6a0e in read_symbols(objfile*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:772:3
    #10 0x1c19531 in syms_from_objfile_1(objfile*, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:968:3
    #11 0x1c180fd in syms_from_objfile(objfile*, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:985:3
    #12 0x1be663c in symbol_file_add_with_addrs(bfd*, char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1088:3
    #13 0x1be70b3 in symbol_file_add_from_bfd(bfd*, char const*,
enum_flags<symfile_add_flag>, std::vector<other_sections,
std::allocator<other_sections> >*, enum_flags<objfile_flag>, objfile*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1168:10
    #14 0x1be7459 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/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1181:10
    #15 0x1be873e in symbol_file_add_main_1(char const*,
enum_flags<symfile_add_flag>, enum_flags<objfile_flag>, unsigned long)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1205:29
    #16 0x1be82ea in symbol_file_add_main(char const*,
enum_flags<symfile_add_flag>)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/symfile.c:1196:3
    #17 0x15c8b73 in symbol_file_add_main_adapter(char const*, int)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:540:3
    #18 0x15c6d2c in catch_command_errors(void (*)(char const*, int), char
const*, int, bool)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:513:7
    #19 0x15c433a in captured_main_1(captured_main_args*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1212:8
    #20 0x15be28d in captured_main(void*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1319:3
    #21 0x15be058 in gdb_main(captured_main_args*)
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/main.c:1344:7
    #22 0x4e4f12 in main
/home/root/sp/Dataset/Binutils/binutils_aflpp/gdb/gdb.c:32:10
    #23 0x7fd47e6c6082 in __libc_start_main
/build/glibc-SzIz7B/glibc-2.31/csu/../csu/libc-start.c:308:16

SUMMARY: AddressSanitizer: heap-use-after-free
(/home/root/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x44aee0)
in strrchr
Shadow bytes around the buggy address:
  0x0ffb097792b0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb097792c0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb097792d0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb097792e0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb097792f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
=>0x0ffb09779300:[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb09779310: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb09779320: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb09779330: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb09779340: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x0ffb09779350: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
Shadow byte legend (one shadow byte represents 8 application bytes):
  Addressable:           00
  Partially addressable: 01 02 03 04 05 06 07 
  Heap left redzone:       fa
  Freed heap region:       fd
  Stack left redzone:      f1
  Stack mid redzone:       f2
  Stack right redzone:     f3
  Stack after return:      f5
  Stack use after scope:   f8
  Global redzone:          f9
  Global init order:       f6
  Poisoned by user:        f7
  Container overflow:      fc
  Array cookie:            ac
  Intra object redzone:    bb
  ASan internal:           fe
  Left alloca redzone:     ca
  Right alloca redzone:    cb
==2661285==ABORTING

Thank you for your attention and support.
Best regards,
Michael Zhang.

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[Bug gdb/30638] AddressSanitizer: heap-use-after-free (/home/cmd/sp/Fuzz/aflpp_fuzz/Binutils/document_group/batch_x/gdb_1/gdb+0x44aee0) in strrchr

[sihan2021 at iscas dot ac.cn]

https://sourceware.org/bugzilla/show_bug.cgi?id=30638

--- Comment #1 from 熊吉思汗 <sihan2021 at iscas dot ac.cn> ---
Created attachment 14966
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14966&action=edit
input file of -x

It is the input file of -x option

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