linux-kernel - Re: [PATCH] powerpc/32s: Fix module loading failure when VMALLOC

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Date:   Thu, 27 Aug 2020 17:46:50 +1000 (AEST)
From:   Michael Ellerman <patch-notifications@...erman.id.au>
To:     Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, schwab@...ux-m68k.org,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/32s: Fix module loading failure when VMALLOC_END is over 0xf0000000

On Fri, 21 Aug 2020 07:15:25 +0000 (UTC), Christophe Leroy wrote:
> In is_module_segment(), when VMALLOC_END is over 0xf0000000,
> ALIGN(VMALLOC_END, SZ_256M) has value 0.
> 
> In that case, addr >= ALIGN(VMALLOC_END, SZ_256M) is always
> true then is_module_segment() always returns false.
> 
> Use (ALIGN(VMALLOC_END, SZ_256M) - 1) which will have
> value 0xffffffff and will be suitable for the comparison.

Applied to powerpc/fixes.

[1/1] powerpc/32s: Fix module loading failure when VMALLOC_END is over 0xf0000000
      https://git.kernel.org/powerpc/c/541cebb51f3422d4f2c6cb95c1e5cc3dcc9e5021

cheers