linux-kernel - Re: [PING PATCH] powerpc/kasan: Fix addr error caused by page alignment

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Date: Thu, 15 Feb 2024 23:57:37 +1100
From: Michael Ellerman <patch-notifications@...erman.id.au>
To: npiggin@...il.com, aneesh.kumar@...nel.org, naveen.n.rao@...ux.ibm.com, christophe.leroy@...roup.eu, christophe.leroy@....fr, Jiangfeng Xiao <xiaojiangfeng@...wei.com>
Cc: linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org, nixiaoming@...wei.com, wangbing6@...wei.com, douzhaolei@...wei.com, wangfangpeng1@...wei.com
Subject: Re: [PING PATCH] powerpc/kasan: Fix addr error caused by page alignment

On Tue, 23 Jan 2024 09:45:59 +0800, Jiangfeng Xiao wrote:
> In kasan_init_region, when k_start is not page aligned,
> at the begin of for loop, k_cur = k_start & PAGE_MASK
> is less than k_start, and then va = block + k_cur - k_start
> is less than block, the addr va is invalid, because the
> memory address space from va to block is not alloced by
> memblock_alloc, which will not be reserved
> by memblock_reserve later, it will be used by other places.
> 
> [...]

Applied to powerpc/fixes.

[1/1] powerpc/kasan: Fix addr error caused by page alignment
      https://git.kernel.org/powerpc/c/4a7aee96200ad281a5cc4cf5c7a2e2a49d2b97b0

cheers