From: Robin Murphy <robin.murphy@arm.com>
To: Marc Gonzalez <marc.w.gonzalez@free.fr>,
Catalin Marinas <catalin.marinas@arm.com>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Marek Szyprowski <m.szyprowski@samsung.com>,
Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: 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 12:19:27 +0000 [thread overview]
Message-ID: <d4facdc2-0581-929f-caa2-b9efa9bd8f97@arm.com> (raw)
In-Reply-To: <6579db26-10ac-3fbf-1998-5b937a38f202@free.fr>
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?
Robin.
next prev parent reply other threads:[~2019-01-21 12:19 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 ` 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 [this message]
2019-01-21 13:35 ` Rob Herring
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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