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Date: Tue, 21 Jun 2016 10:14:07 -0500 From: Bjorn Helgaas <helgaas@...nel.org> To: Lorenzo Pieralisi <lorenzo.pieralisi@....com> Cc: Tyler Baker <tyler.baker@...aro.org>, linux-pci@...r.kernel.org, rfi@...ts.rocketboards.org, Bjorn Helgaas <bhelgaas@...gle.com>, Thierry Reding <thierry.reding@...il.com>, Tanmay Inamdar <tinamdar@....com>, Kevin's boot bot <khilman@...nel.org>, Pratyush Anand <pratyush.anand@...il.com>, Michal Simek <michal.simek@...inx.com>, linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, Jason Cooper <jason@...edaemon.net>, Jon Mason <jonmason@...adcom.com>, Ray Jui <rjui@...adcom.com>, Simon Horman <horms@...ge.net.au>, linux-tegra@...r.kernel.org, Alex Benn??e <alex.bennee@...aro.org>, S??ren Brinkmann <soren.brinkmann@...inx.com>, Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, Scott Branden <sbranden@...adcom.com>, Jingoo Han <jingoohan1@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, linux-renesas-soc@...r.kernel.org, Ley Foon Tan <lftan@...era.com> Subject: Re: [PATCH v1 15/25] PCI: generic: Free resource list close to where it's allocated On Mon, Jun 20, 2016 at 06:22:40PM +0100, Lorenzo Pieralisi wrote: > On Mon, Jun 20, 2016 at 09:56:45AM -0700, Tyler Baker wrote: > > Hi Bjorn, > > > > On 6 June 2016 at 16:06, Bjorn Helgaas <bhelgaas@...gle.com> wrote: > > > Previously we allocated the PCI resource list in > > > gen_pci_parse_request_of_pci_ranges(), but if we had an error, we freed it > > > on error in gen_pci_init(). > > > > > > Reorder gen_pci_init() so we can take care of error path cleanup in > > > gen_pci_parse_request_of_pci_ranges() instead. > > > > > > Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com> > > > > The kernelci.org bot has reported[0] new qemu-aarch64 > > (arm64-defconfig) boot failures[1][2] in next-20160620. I've > > bisected[3] this boot failure down to this patch, and confirmed > > reverting it on top of next-20160620 resolves the boot issue. > > > > I have not investigated further, but you can easily reproduce[4] the > > boot failure on an x86 host running qemu-system-aarch64 (I'm running > > qemu-system 2.6). > > That's most likely because pci_ecam_create() requires the bus_range > resource (its busr parameter) to be initialized when it is called > and that's not the case after this patch is applied if I read it > correctly. > > It is probably a NULL pointer dereference in pci_ecam_create(). Yep, thanks everybody, I dropped that ill-considered patch altogether. > > [0] https://kernelci.org/boot/all/job/next/kernel/next-20160620/ > > [1] https://storage.kernelci.org/next/next-20160620/arm64-defconfig/lab-cambridge/boot-apm-mustang-kvm-guest.txt > > [2] https://storage.kernelci.org/next/next-20160620/arm64-defconfig/lab-tbaker/boot-qemu-aarch64,legacy.txt > > [3] http://hastebin.com/segiruribu.vbs > > [4] http://hastebin.com/dafuzicuyi.avrasm > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > > the body of a message to majordomo@...r.kernel.org > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@...ts.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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