linux-kernel - Re: [PATCH 0/8] tools/nolibc: add support for stack protector

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Message-ID: <a65340bb-2d11-445b-8595-9bf25a9f7a47@paulmck-laptop>
Date:   Sun, 26 Mar 2023 08:13:48 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Willy Tarreau <w@....eu>
Cc:     linux@...ssschuh.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/8] tools/nolibc: add support for stack protector

On Sat, Mar 25, 2023 at 09:36:28PM -0700, Paul E. McKenney wrote:
> On Sat, Mar 25, 2023 at 04:45:08PM +0100, Willy Tarreau wrote:
> > Hello Paul,
> > 
> > This is essentially Thomas' work so instead of paraphrasing his work,
> > I'm pasting his description below. I've tested his changes on all
> > supported archs, applied a tiny modification with his permission
> > to continue to support passing CFLAGS, and for me this is all fine.
> > In a short summary this adds support for stack protector to i386 and
> > x86_64 in nolibc, and the accompanying test to the selftest program.
> > 
> > A new test category was added, "protection", which currently has a
> > single test. Archs that support it will report "OK" there and those
> > that do not will report "SKIPPED", as is already the case for tests
> > that cannot be run.
> > 
> > This was applied on top of your dev.2023.03.20a branch. I'm reasonably
> > confident with the nature of the changes, so if your queue for 6.4 is
> > not closed yet, it can be a good target, otherwise 6.5 will be fine as
> > well.
> 
> I have applied and pushed it out, thank you both!
> 
> We are a little late in the process, but if testing goes well, I can't
> see why this cannot make the v6.4 merge window.

And "make run-user" says "124 test(s) passed", which looks promising.

But "make run" says "0 test(s) passed".

(They initially both said "0 test(s) passed", but that was because I
forgot to build qemu-x86_64 after an upgrade.)

Please see below for the full output of "make run".  Am I missing
some other package?

							Thanx, Paul

------------------------------------------------------------------------

  MKDIR   sysroot/x86/include
make[1]: Entering directory '/home/git/linux-rcu/tools/include/nolibc'
make[2]: Entering directory '/home/git/linux-rcu'
make[2]: Leaving directory '/home/git/linux-rcu'
make[2]: Entering directory '/home/git/linux-rcu'
  INSTALL /home/git/linux-rcu/tools/testing/selftests/nolibc/sysroot/sysroot/include
make[2]: Leaving directory '/home/git/linux-rcu'
make[1]: Leaving directory '/home/git/linux-rcu/tools/include/nolibc'
  CC      nolibc-test
  MKDIR   initramfs
  INSTALL initramfs/init
make[1]: Entering directory '/home/git/linux-rcu'
  DESCEND objtool
  INSTALL libsubcmd_headers
  CALL    scripts/checksyscalls.sh
  GEN     usr/initramfs_data.cpio
  GZIP    usr/initramfs_inc_data
  AS      usr/initramfs_data.o
  AR      usr/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  MODPOST vmlinux.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  LD      .tmp_vmlinux.kallsyms1
  NM      .tmp_vmlinux.kallsyms1.syms
  KSYMS   .tmp_vmlinux.kallsyms1.S
  AS      .tmp_vmlinux.kallsyms1.S
  LD      .tmp_vmlinux.kallsyms2
  NM      .tmp_vmlinux.kallsyms2.syms
  KSYMS   .tmp_vmlinux.kallsyms2.S
  AS      .tmp_vmlinux.kallsyms2.S
  LD      .tmp_vmlinux.kallsyms3
  NM      .tmp_vmlinux.kallsyms3.syms
  KSYMS   .tmp_vmlinux.kallsyms3.S
  AS      .tmp_vmlinux.kallsyms3.S
  LD      vmlinux
  NM      System.map
  SORTTAB vmlinux
  CC      arch/x86/boot/version.o
  VOFFSET arch/x86/boot/compressed/../voffset.h
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  CC      arch/x86/boot/compressed/kaslr.o
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  CC      arch/x86/boot/compressed/misc.o
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  OBJCOPY arch/x86/boot/vmlinux.bin
  AS      arch/x86/boot/header.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#103)
make[1]: Leaving directory '/home/git/linux-rcu'
0 test(s) passed.