lkml.org 
[lkml]   [2018]   [Jan]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: CONFIG_PAGE_TABLE_ISOLATION=y on x86_64 causes gcc to segfault when building x86_32 binaries
Lars,

On Wed, 3 Jan 2018, Lars Wendler wrote:

Thanks for the report.

> I already had a conversation with Thomas Gleixner about this issue and
> he asked me to post it here.
>
> After upgrading my system to vanilla 4.14.11 kernel with
> CONFIG_PAGE_TABLE_ISOLATION=y I could no longer build any 32bit
> binaries because gcc (7.2.0) segfaults.

That's a 64bit binary, right?

> This only happens with CONFIG_PAGE_TABLE_ISOLATION=y
> I can get rid of this issue by setting CONFIG_PAGE_TABLE_ISOLATION=n
> _or_ adding pti=off to the kernel command line (the latter was
> suggested by Thomas).
>
> Please find attached the kernel's config together with the dmesg output
> of the kernel that produces segfaults and the one with pti=off. I also
> attached a config.log file from a build where gcc segfaulted.
>
> If you need more information, please don't hesitate to ask.

will do.

Thanks,

tglx

\
 
 \ /
  Last update: 2018-01-03 12:58    [W:0.008 / U:8.216 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site