Subject: Re: 4.14.9 doesn't boot (regression)
To: Alexander Tsoy <alexander@tsoy.me>,
        Andy Lutomirski <luto@amacapital.net>,
        Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable <stable@vger.kernel.org>,
        Linux Kernel <linux-kernel@vger.kernel.org>,
        the arch/x86 maintainers <x86@kernel.org>, jpoimboe@redhat.com
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From: =?UTF-8?Q?Toralf_F=c3=b6rster?= <toralf.foerster@gmx.de>
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Date: Sat, 30 Dec 2017 13:58:20 +0100
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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