https://sourceware.org/bugzilla/show_bug.cgi?id=32643
Bug ID: 32643
Summary: ld SEGV (illegal read access) in _bfd_elf_gc_mark_rsec
(bfd/elflink.c:14031:11) with --gc-sections
--no-print-gc-sections -w options
Product: binutils
Version: 2.43
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: swj22 at mails dot tsinghua.edu.cn
Target Milestone: ---
Created attachment 15918
--> https://sourceware.org/bugzilla/attachment.cgi?id=15918&action=edit
poc
**Description**
A segv can occur in ld (part of binutils 2.43) when using the --gc-sections
--no-print-gc-sections -w options with a specially crafted input file. This
issue leads to memory corruption (illegal memory read access) and crashes.
**Affected Version**
GNU ld (GNU Binutils) 2.43
**Steps to Reproduce**
Build binutils 2.43 with AddressSanitizer (e.g., CFLAGS="-g -fsanitize=address"
./configure && make -j).
Run the following command:
./binutils-2.43/bins/bin/ld --gc-sections --no-print-gc-sections -w /tmp/poc
./binutils-2.43/bins/bin/ld: /tmp/poc symbol number 45 references nonexistent
SHT_SYMTAB_SHNDX section
AddressSanitizer:DEADLYSIGNAL
=================================================================
==486332==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000010 (pc
0x55735179a445 bp 0x7ffdcb9d5190 sp 0x7ffdcb9d4fb0 T0)
==486332==The signal is caused by a READ memory access.
==486332==Hint: address points to the zero page.
#0 0x55735179a445 in _bfd_elf_gc_mark_rsec
./binutils-2.43/bfd/elflink.c:14031:11
#1 0x55735179ac90 in _bfd_elf_gc_mark_reloc
./binutils-2.43/bfd/elflink.c:14091:10
#2 0x55735179b474 in _bfd_elf_gc_mark
./binutils-2.43/bfd/elflink.c:14143:11
#3 0x55735179ae30 in _bfd_elf_gc_mark_reloc
./binutils-2.43/bfd/elflink.c:14099:14
#4 0x55735179b474 in _bfd_elf_gc_mark
./binutils-2.43/bfd/elflink.c:14143:11
#5 0x55735179ae30 in _bfd_elf_gc_mark_reloc
./binutils-2.43/bfd/elflink.c:14099:14
#6 0x55735179b474 in _bfd_elf_gc_mark
./binutils-2.43/bfd/elflink.c:14143:11
#7 0x5573517a08fc in bfd_elf_gc_sections
./binutils-2.43/bfd/elflink.c:14719:11
#8 0x557351549b0d in lang_gc_sections ./binutils-2.43/ld/ldlang.c:7763:5
#9 0x55735154378b in lang_process ./binutils-2.43/ld/ldlang.c:8378:3
#10 0x55735156d34c in main ./binutils-2.43/ld/./ldmain.c:529:3
#11 0x7fc0629db082 in __libc_start_main
/build/glibc-LcI20x/glibc-2.31/csu/../csu/libc-start.c:308:16
#12 0x5573514456bd in _start (./binutils-2.43/bins/bin/ld+0x15a6bd)
(BuildId: d9731e405748db264b62c84ded760ba4f068cb0a)
AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: SEGV ./binutils-2.43/bfd/elflink.c:14031:11 in
_bfd_elf_gc_mark_rsec
==486332==ABORTING
** Env **
Distributor ID: Ubuntu
Description: Ubuntu 20.04.6 LTS
Release: 20.04
Codename: focal
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