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Documentation/changes: Raise minimum supported binutils version to 2.23 

The currently minimum-supported binutils version 2.21 has the problem of
promoting symbols which are defined outside of a section into absolute.
According to Arvind:

  binutils-2.21 and -2.22. An x86-64 defconfig will fail with
          Invalid absolute R_X86_64_32S relocation: _etext
  and after fixing that one, with
          Invalid absolute R_X86_64_32S relocation: __end_of_kernel_reserve

Those two versions of binutils have a bug when it comes to handling
symbols defined outside of a section and binutils 2.23 has the proper
fix, see: https://sourceware.org/legacy-ml/binutils/2012-06/msg00155.html

Therefore, up to the fixed version directly, skipping the broken ones.

Currently shipping distros already have the fixed binutils version so
there should be no breakage resulting from this.

For more details about the whole thing, see the thread in Link.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200110202349.1881840-1-nivedita@alum.mit.edu
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Jason A. Donenfeld <Jason@zx2c4.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Borislav Petkov 2020-03-26 17:01:02 +09:00 committed by Masahiro Yamada
parent 3f523e1240
commit 0aa78b105f
1 changed files with 2 additions and 2 deletions
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4
Documentation/process/changes.rst
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@ -31,7 +31,7 @@ you probably needn't concern yourself with pcmciautils.
====================== =============== ========================================
GNU C 4.6 gcc --version
GNU make 3.81 make --version
binutils 2.21 ld -v
binutils 2.23 ld -v
flex 2.5.35 flex --version
bison 2.0 bison --version
util-linux 2.10o fdformat --version
@ -76,7 +76,7 @@ You will need GNU make 3.81 or later to build the kernel.
Binutils
--------
Binutils 2.21 or newer is needed to build the kernel.
Binutils 2.23 or newer is needed to build the kernel.
pkg-config
----------