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From: Thomas Gleixner <tglx@linutronix.de>
To: Xose Vazquez Perez <xose.vazquez@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>, x86 team <x86@kernel.org>
Subject: Re: bug disabling NX (noexec=off)
Date: Sun, 14 Apr 2019 11:59:30 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.21.1904141158400.4917@nanos.tec.linutronix.de> (raw)
In-Reply-To: <c090ad3c-1f2f-c148-dd44-a58df0788588@gmail.com>

On Sat, 13 Apr 2019, Xose Vazquez Perez wrote:
> [    0.000000] NX (Execute Disable) protection: disabled by kernel command line option
> [    0.000000] ------------[ cut here ]------------
> [    0.000000] attempted to set unsupported pgprot: 8000000000000163 bits: 8000000000000000 supported: 7fffffffffffffff

Does the below patch fix it for you?

Thanks,

	tglx

8<----------------
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 0029604af8a4..dd73d5d74393 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -825,7 +825,7 @@ void __init __early_set_fixmap(enum fixed_addresses idx,
 	pte = early_ioremap_pte(addr);
 
 	/* Sanitize 'prot' against any unsupported bits: */
-	pgprot_val(flags) &= __default_kernel_pte_mask;
+	pgprot_val(flags) &= __supported_pte_mask;
 
 	if (pgprot_val(flags))
 		set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags));

  reply	other threads:[~2019-04-14  9:59 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-13 20:53 bug disabling NX (noexec=off) Xose Vazquez Perez
2019-04-14  9:59 ` Thomas Gleixner [this message]
2019-04-14 21:26   ` Xose Vazquez Perez
2019-04-15  8:46     ` [PATCH] x86/mm: Prevent bogus warnings with "noexec=off" Thomas Gleixner
2019-04-15 22:57       ` Xose Vazquez Perez
2019-04-16  7:46       ` [tip:x86/urgent] " tip-bot for Thomas Gleixner

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