linux-kernel - [GIT PULL] LTO fix for v5.12-rc6

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Message-ID: <202104011435.78CF22D@keescook>
Date:   Thu, 1 Apr 2021 14:39:19 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Sami Tolvanen <samitolvanen@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: [GIT PULL] LTO fix for v5.12-rc6

Hi Linus,

Please pull this LTO fix for v5.12-rc6. It seems that there is a bug in
ld.bfd when doing module section merging. As explicit merging is only
needed for LTO, the work-around is to only do it under LTO, leaving the
original section layout choices alone under normal builds.

Thanks!

-Kees

The following changes since commit a5e13c6df0e41702d2b2c77c8ad41677ebb065b3:

  Linux 5.12-rc5 (2021-03-28 15:48:16 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/lto-v5.12-rc6

for you to fetch changes up to 6a3193cdd5e5b96ac65f04ee42555c216da332af:

  kbuild: lto: Merge module sections if and only if CONFIG_LTO_CLANG is enabled (2021-04-01 14:15:59 -0700)

----------------------------------------------------------------
LTO fix for v5.12-rc6

- Only perform explicit module section merges under LTO (Sean Christopherson)

----------------------------------------------------------------
Sean Christopherson (1):
      kbuild: lto: Merge module sections if and only if CONFIG_LTO_CLANG is enabled

 scripts/module.lds.S | 2 ++
 1 file changed, 2 insertions(+)

-- 
Kees Cook