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[198.84.239.141]) by smtp.gmail.com with ESMTPSA id p7-20020a0ce187000000b0063d0159e1f6sm365781qvl.109.2023.07.27.05.07.24 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 27 Jul 2023 05:07:24 -0700 (PDT) Subject: Re: Kernel 6.5-rc2: system crash on suspend bisected To: "Michael S. Tsirkin" , Bjorn Helgaas Cc: imammedo@redhat.com, bhelgaas@google.com, LKML , linux-pci@vger.kernel.org, regressions@lists.linux.dev, "Linux regression tracking #adding (Thorsten Leemhuis)" , Woody Suwalski References: <11fc981c-af49-ce64-6b43-3e282728bd1a@gmail.com> <20230720202110.GA544761@bhelgaas> <20230727020621-mutt-send-email-mst@kernel.org> From: Woody Suwalski Message-ID: <1d51d250-9524-33c5-9b3a-af8c33582eee@gmail.com> Date: Thu, 27 Jul 2023 08:07:23 -0400 User-Agent: Mozilla/5.0 (X11; Linux i686; rv:91.0) Gecko/20100101 Firefox/91.0 SeaMonkey/2.53.16 MIME-Version: 1.0 In-Reply-To: <20230727020621-mutt-send-email-mst@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Michael S. Tsirkin wrote: > On Thu, Jul 20, 2023 at 03:21:10PM -0500, Bjorn Helgaas wrote: >> [+cc regressions list] >> >> On Wed, Jul 19, 2023 at 11:36:51PM -0400, Woody Suwalski wrote: >>> Laptop shows a kernel crash trace after a first suspend to ram, on a second >>> attempt to suspend it becomes frozen solid. This is 100% repeatable with a >>> 6.5-rc2 kernel, not happening with a 6.4 kernel - see the attached dmesg >>> output. >>> >>> I have bisected the kernel uilds and it points to : >>> [40613da52b13fb21c5566f10b287e0ca8c12c4e9] PCI: acpiphp: Reassign resources >>> on bridge if necessary >>> >>> Reversing this patch seems to fix the kernel crash problem on my laptop. >> Thank you very much for all your work debugging, bisecting, and >> reporting this! This is incredibly helpful. >> >> Original report, including complete dmesg logs for both v6.4 and >> v6.5-rc2: >> https://lore.kernel.org/r/11fc981c-af49-ce64-6b43-3e282728bd1a@gmail.com >> >> I queued up a revert of 40613da52b13 ("PCI: acpiphp: Reassign >> resources on bridge if necessary") (on my for-linus branch for v6.5). >> >> It looks like a NULL pointer dereference; hopefully the fix is obvious >> and I can drop the revert and replace it with the fix. >> >> Bjorn > Patch on list now: > https://lore.kernel.org/all/20230726123518.2361181-1-imammedo%40redhat.com Confirm works OK. -- Tested-by: Woody Suwalski -- Thanks, Woody