https://sourceware.org/bugzilla/show_bug.cgi?id=33471
Bug ID: 33471
Summary: [BUG] A heap-buffer-overflow in
elf_x86_64_relocate_section at elf64-x86-64.c:4501
Product: binutils
Version: 2.45
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: yfzhang23 at stu dot pku.edu.cn
Target Milestone: ---
Created attachment 16367
--> https://sourceware.org/bugzilla/attachment.cgi?id=16367&action=edit
POC
## Description
- Version: Binutils 2.45 with patches in bug 33451, bug 33455, and bug 33457.
- Environment: Ubuntu 20.04.6 LTS, Clang 12.0.0
## Steps to reproduce
export CC="clang"
export CFLAGS="-g -fsanitize=address"
./configure
make -j
./ld/ld-new --gc-sections --no-print-gc-sections -w $POC
## Sanitizer output
==147238==ERROR: AddressSanitizer: heap-buffer-overflow on address
0x62900000f1fd at pc 0x000000637818 bp 0x7ffd392edb70 sp 0x7ffd392edb68
READ of size 1 at 0x62900000f1fd thread T0
#0 0x637817 in elf_x86_64_relocate_section
/benchmark/bin/binutils-2.45/bfd/elf64-x86-64.c:4501:24
#1 0x7696f4 in elf_link_input_bfd
/benchmark/bin/binutils-2.45/bfd/elflink.c:11926:10
#2 0x75b539 in bfd_elf_final_link
/benchmark/bin/binutils-2.45/bfd/elflink.c:13185:11
#3 0x545133 in ldwrite /benchmark/bin/binutils-2.45/ld/ldwrite.c:548:8
#4 0x53cc51 in main /benchmark/bin/binutils-2.45/ld/./ldmain.c:912:3
#5 0x7f7601a2f082 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x24082)
#6 0x41d6ad in _start (/benchmark/bin/binutils-2.45/ld/ld-new+0x41d6ad)
0x62900000f1fd is located 3 bytes to the left of 16384-byte region
[0x62900000f200,0x629000013200)
allocated by thread T0 here:
#0 0x49917d in malloc
/src/llvm-project/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
#1 0x5dcf72 in bfd_malloc /benchmark/bin/binutils-2.45/bfd/libbfd.c:291:9
#2 0x75a29e in bfd_elf_final_link
/benchmark/bin/binutils-2.45/bfd/elflink.c:13060:38
#3 0x545133 in ldwrite /benchmark/bin/binutils-2.45/ld/ldwrite.c:548:8
#4 0x53cc51 in main /benchmark/bin/binutils-2.45/ld/./ldmain.c:912:3
#5 0x7f7601a2f082 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x24082)
SUMMARY: AddressSanitizer: heap-buffer-overflow
/benchmark/bin/binutils-2.45/bfd/elf64-x86-64.c:4501:24 in
elf_x86_64_relocate_section
Shadow bytes around the buggy address:
0x0c527fff9de0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c527fff9df0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c527fff9e00: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c527fff9e10: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c527fff9e20: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
=>0x0c527fff9e30: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa[fa]
0x0c527fff9e40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c527fff9e50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c527fff9e60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c527fff9e70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c527fff9e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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
Shadow gap: cc
==147238==ABORTING
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/benchmark/bin/binutils-2.45/bfd/elf-eh-frame.c:2166:10 in
_bfd_elf_write_section_eh_frame
==146908==ABORTING
## Credit
Reported by Yifan Zhang, [PLL](https://pl.cs.pku.edu.cn/en/)
--
You are receiving this mail because:
You are on the CC list for the bug.
