https://sourceware.org/bugzilla/show_bug.cgi?id=33452
Bug ID: 33452
Summary: [BUG] A SEGV in bfd_elf_gc_record_vtentry at
elflink.c:14898
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 16348
--> https://sourceware.org/bugzilla/attachment.cgi?id=16348&action=edit
POC
## Description
- Version: Binutils 2.45
- 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
==139060==ERROR: AddressSanitizer: SEGV on unknown address (pc 0x00000078475b
bp 0x7ffd531ce9f0 sp 0x7ffd531ce8a0 T0)
==139060==The signal is caused by a READ memory access.
==139060==Hint: this fault was caused by a dereference of a high value address
(see register values below). Disassemble the provided pc to learn which
register was used.
#0 0x78475b in bfd_elf_gc_record_vtentry
/benchmark/bin/binutils-2.45/bfd/elflink.c:14898:48
#1 0x64f209 in elf_x86_64_scan_relocs
/benchmark/bin/binutils-2.45/bfd/elf64-x86-64.c:3061:9
#2 0x729d55 in _bfd_elf_link_iterate_on_relocs
/benchmark/bin/binutils-2.45/bfd/elflink.c:4282:9
#3 0x629244 in elf_x86_64_early_size_sections
/benchmark/bin/binutils-2.45/bfd/elf64-x86-64.c:3106:6
#4 0x73c762 in bfd_elf_size_dynamic_sections
/benchmark/bin/binutils-2.45/bfd/elflink.c:6916:11
#5 0x59afe4 in ldelf_before_allocation
/benchmark/bin/binutils-2.45/ld/ldelf.c:1840:10
#6 0x57acc0 in gldelf_x86_64_before_allocation
/benchmark/bin/binutils-2.45/ld/eelf_x86_64.c:172:3
#7 0x57111b in elf_x86_64_before_allocation
/benchmark/bin/binutils-2.45/ld/eelf_x86_64.c:115:3
#8 0x554af7 in ldemul_before_allocation
/benchmark/bin/binutils-2.45/ld/ldemul.c:104:3
#9 0x50cdcc in lang_process /benchmark/bin/binutils-2.45/ld/ldlang.c:8627:3
#10 0x53ca89 in main /benchmark/bin/binutils-2.45/ld/./ldmain.c:882:3
#11 0x7f274cee4082 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x24082)
#12 0x41d6ad in _start (/benchmark/bin/binutils-2.45/ld/ld-new+0x41d6ad)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV
/benchmark/bin/binutils-2.45/bfd/elflink.c:14898:48 in
bfd_elf_gc_record_vtentry
==139060==ABORTING
## Credit
Reported by Yifan Zhang, [PLL](https://pl.cs.pku.edu.cn/en/)
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