From: Rob Herring <robh+dt@kernel.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Marc Gonzalez <marc.w.gonzalez@free.fr>,
Catalin Marinas <catalin.marinas@arm.com>,
Frank Rowand <frowand.list@gmail.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Mark Rutland <mark.rutland@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Oscar Salvador <osalvador@suse.de>,
Wei Yang <richard.weiyang@gmail.com>,
Michal Hocko <mhocko@suse.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Sri Krishna chowdary <schowdary@nvidia.com>,
Qian Cai <cai@lca.pw>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: kmemleak panic
Date: Mon, 21 Jan 2019 07:35:11 -0600 [thread overview]
Message-ID: <CAL_JsqKFT8J6g02gxeBiTfBb_XHhp2-ZNB6DgaLPK85kNZGRig@mail.gmail.com> (raw)
In-Reply-To: <d4facdc2-0581-929f-caa2-b9efa9bd8f97@arm.com>
On Mon, Jan 21, 2019 at 6:19 AM Robin Murphy <robin.murphy@arm.com> wrote:
>
> On 21/01/2019 11:57, Marc Gonzalez wrote:
> [...]
> > # echo dump=0xffffffc021e00000 > /sys/kernel/debug/kmemleak
> > kmemleak: Object 0xffffffc021e00000 (size 2097152):
> > kmemleak: comm "swapper/0", pid 0, jiffies 4294892296
> > kmemleak: min_count = 0
> > kmemleak: count = 0
> > kmemleak: flags = 0x1
> > kmemleak: checksum = 0
> > kmemleak: backtrace:
> > kmemleak_alloc_phys+0x48/0x60
> > memblock_alloc_range_nid+0x8c/0xa4
> > memblock_alloc_base_nid+0x4c/0x60
> > __memblock_alloc_base+0x3c/0x4c
> > early_init_dt_alloc_reserved_memory_arch+0x54/0xa4
> > fdt_init_reserved_mem+0x308/0x3ec
> > early_init_fdt_scan_reserved_mem+0x88/0xb0
> > arm64_memblock_init+0x1dc/0x254
> > setup_arch+0x1c8/0x4ec
> > start_kernel+0x84/0x44c
> > 0xffffffffffffffff
>
> OK, so via the __va(phys) call in kmemleak_alloc_phys(), you end up with
> the linear map address of a no-map reservation, which unsurprisingly
> turns out not to be mapped. Is there a way to tell kmemleak that it
> can't scan within a particular object?
There was this patch posted[1]. I never got a reply, so it hasn't been applied.
Rob
https://patchwork.ozlabs.org/patch/995367/
next prev parent reply other threads:[~2019-01-21 13:35 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <f6fbf528-8213-e3b8-6990-9fcf9dec04d6@free.fr>
[not found] ` <20190118143434.GE118707@arrakis.emea.arm.com>
2019-01-18 15:36 ` kmemleak panic Marc Gonzalez
2019-01-18 16:14 ` Qian Cai
2019-01-18 17:05 ` Marc Gonzalez
2019-01-18 17:38 ` Qian Cai
2019-01-19 10:21 ` Marc Gonzalez
2019-01-18 19:12 ` Robin Murphy
2019-01-19 13:28 ` Catalin Marinas
2019-01-21 11:57 ` Marc Gonzalez
2019-01-21 12:19 ` Robin Murphy
2019-01-21 13:35 ` Rob Herring [this message]
2019-01-21 13:54 ` Marc Gonzalez
2019-01-22 8:20 ` Prateek Patel
2019-01-21 14:37 ` Catalin Marinas
2019-01-21 15:42 ` Rob Herring
2019-01-21 15:53 ` Robin Murphy
2019-01-21 17:42 ` Mike Rapoport
2019-01-22 14:02 ` Marc Gonzalez
2019-01-22 14:12 ` Marc Gonzalez
2019-01-23 5:54 ` Mike Rapoport
2019-01-23 7:05 ` Prateek Patel
2019-01-23 7:28 ` Marek Szyprowski
2019-01-23 12:31 ` [PATCH v2] of: fix kmemleak crash (was: Re: kmemleak panic) Mike Rapoport
2019-02-01 16:23 ` [PATCH v2] of: fix kmemleak crash Marc Gonzalez
2019-02-04 10:10 ` Marc Gonzalez
2019-02-04 15:25 ` Greg Kroah-Hartman
2019-02-04 16:41 ` Rob Herring
2019-02-04 14:37 ` [RESEND PATCH v2] of: fix kmemleak crash caused by imbalance in early memory reservation Marc Gonzalez
2019-02-11 16:47 ` Marc Gonzalez
2019-02-12 16:03 ` Rob Herring
2019-02-12 21:50 ` Stephen Rothwell
2019-02-12 21:52 ` Andrew Morton
2019-02-12 22:12 ` Rob Herring
2019-02-13 6:57 ` Mike Rapoport
2019-02-13 9:27 ` Marc Gonzalez
2019-02-13 16:30 ` Mike Rapoport
2019-03-06 2:12 ` Guenter Roeck
2019-03-06 13:39 ` Rob Herring
2019-03-06 16:18 ` Guenter Roeck
2019-01-21 12:22 ` kmemleak panic Marc Gonzalez
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