On 04/18/2018 12:59 PM, Andrew Morton wrote:
> Dave, fb43d6cb91ef57 ("x86/mm: Do not auto-massage page protections")
> looks like a culprit?
This looks like a problem when a 32-bit kernel runs on hardware without
NX support. I'm digging into it but haven't found a root cause yet.
On 04/18/2018 12:59 PM, Andrew Morton wrote:
>> [ 12.348499] [ cut here ]
>> [ 12.349193] attempted to set unsupported pgprot: 8025 bits:
>> 8000 supported: 7fff
>> [ 12.350792] WARNING: CPU: 0 PID: 1 at arch/x86/include/asm/pgtable
On Wed, 18 Apr 2018 21:59:33 +0800 Fengguang Wu wrote:
> Hello,
>
> FYI this happens in mainline kernel 4.17.0-rc1.
> It looks like a new regression.
>
> It occurs in 4 out of 4 boots.
>
> [ 12.345562] Write protecting the kernel text: 14376k
> [ 12.346649] Write protecting the kernel read
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