Bug 211693

Created attachment 295217 [details]
.config which triggers the bug

Hi kernel developers.

Since binutils-2.36.1 is released, we managed to incorporate them into Linux From Scratch (http://www.linuxfromscratch.org/lfs/view/development/).  Unfortunately, some users and editors report that they are getting segfaults from objtool trying to build the kernel.

$ make mrproper
$ gzip -cd ~/config-segfault.gz > .config
$ make arch/x86/kernel/apic/apic.o
(long output ...)
  CC      arch/x86/kernel/apic/apic.o
make[3]: *** [scripts/Makefile.build:279: arch/x86/kernel/apic/apic.o] Segmentation fault (core dumped)
make[3]: *** Deleting file 'arch/x86/kernel/apic/apic.o'
make[2]: *** [scripts/Makefile.build:496: arch/x86/kernel/apic] Error 2
make[1]: *** [scripts/Makefile.build:496: arch/x86/kernel] Error 2
make: *** [Makefile:1801: arch/x86] Error 2

It's reproducible with kernel source code of 5.10.x (at least 5.10.14 and 5.10.15).  It only happens if binutils-2.36 or 2.36.1 is used.  Binutils-2.35.x builds the kernel without any problem.

The stack backtrace is:

Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x000000000040c0ae in elf_rebuild_rela_reloc_section (nr=<optimized out>, 
    sec=0x2c6cee0) at elf.c:890
#1  elf_rebuild_reloc_section (elf=<optimized out>, sec=sec@entry=0x2c6cee0)
    at elf.c:911
#2  0x0000000000408b0d in create_static_call_sections (file=0x41f920 <file>)
    at check.c:520
#3  check (file=file@entry=0x41f920 <file>) at check.c:2918
#4  0x000000000040b2d2 in cmd_orc (argc=1, argv=<optimized out>)
    at builtin-orc.c:47
#5  0x00000000004026cb in handle_internal_command (argv=0x7fff961e2e00, argc=6)
    at objtool.c:128
#6  main (argc=6, argv=0x7fff961e2e00) at objtool.c:151

The .config file content triggering the issue is attached.