From: Mike Rapoport <rppt@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
Mike Rapoport <rppt@linux.ibm.com>,
Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] memblock: exclude NOMAP regions from kmemleak
Date: Wed, 13 Oct 2021 14:35:18 +0300 [thread overview]
Message-ID: <YWbEdklkUD3uIePa@kernel.org> (raw)
In-Reply-To: <YWaOpMhO6LoiiD+S@arm.com>
On Wed, Oct 13, 2021 at 08:45:40AM +0100, Catalin Marinas wrote:
> On Wed, Oct 13, 2021 at 08:47:56AM +0300, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@linux.ibm.com>
> >
> > Vladimir Zapolskiy reports:
> >
> > commit a7259df76702 ("memblock: make memblock_find_in_range method private")
> > invokes a kernel panic while running kmemleak on OF platforms with nomaped
> > regions:
> >
> > Unable to handle kernel paging request at virtual address fff000021e00000
> > [...]
> > scan_block+0x64/0x170
> > scan_gray_list+0xe8/0x17c
> > kmemleak_scan+0x270/0x514
> > kmemleak_write+0x34c/0x4ac
> >
> > Indeed, NOMAP regions don't have linear map entries so an attempt to scan
> > these areas would fault.
> >
> > Prevent such faults by excluding NOMAP regions from kmemleak.
> >
> > Link: https://lore.kernel.org/all/8ade5174-b143-d621-8c8e-dc6a1898c6fb@linaro.org
> > Fixes: a7259df76702 ("memblock: make memblock_find_in_range method private")
> > Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
> > Tested-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Thanks!
I'm going to take it via memblock tree if that's fine with everybody.
--
Sincerely yours,
Mike.
next prev parent reply other threads:[~2021-10-13 11:35 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 5:47 [PATCH] memblock: exclude NOMAP regions from kmemleak Mike Rapoport
2021-10-13 7:45 ` Catalin Marinas
2021-10-13 11:35 ` Mike Rapoport [this message]
2021-10-19 3:55 ` Qian Cai
2021-10-19 5:45 ` Mike Rapoport
2021-10-19 11:37 ` Catalin Marinas
2021-10-19 15:06 ` Qian Cai
2021-10-19 15:53 ` Catalin Marinas
2021-10-19 17:59 ` Qian Cai
2021-10-19 18:33 ` Mike Rapoport
2021-10-20 7:38 ` Mike Rapoport
2021-10-20 8:18 ` Catalin Marinas
2021-10-20 8:42 ` Mike Rapoport
2021-10-20 9:33 ` Catalin Marinas
2021-10-20 10:13 ` Catalin Marinas
2021-10-20 10:39 ` Mike Rapoport
2021-10-19 4:21 ` Anshuman Khandual
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