linux-kernel - Re: 4.14.9 doesn't boot (regression)

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Date:   Sat, 30 Dec 2017 13:58:20 +0100
From:   Toralf Förster <toralf.foerster@....de>
To:     Alexander Tsoy <alexander@...y.me>,
        Andy Lutomirski <luto@...capital.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     stable <stable@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        jpoimboe@...hat.com
Subject: Re: 4.14.9 doesn't boot (regression)

On 12/30/2017 02:13 AM, Alexander Tsoy wrote:
> You are right, It's due to fstack-check enabled in gentoo's gcc spec.
> "-fstack-check=no" in KBUILD_CFLAGS fixed this problem for me. =/

This made the issue go away :

diff --git a/Makefile b/Makefile
index ac8c441866b7..11a12947c550 100644
--- a/Makefile
+++ b/Makefile
@@ -414,7 +414,7 @@ LINUXINCLUDE    := \
 
 KBUILD_AFLAGS   := -D__ASSEMBLY__
 KBUILD_CFLAGS   := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-                  -fno-strict-aliasing -fno-common -fshort-wchar \
+                  -fno-strict-aliasing -fno-common -fshort-wchar -fstack-check=no \
                   -Werror-implicit-function-declaration \
                   -Wno-format-security \
                   -std=gnu89

But this doesn't solve the root cause, right ? So if the root cause is "Gentoo hardened GCC is broken" please just let me know this - FWIW I'm in #gentoo-dev on freenode.

-- 
Toralf
PGP C4EACDDE 0076E94E