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Thu, 27 Mar 2025 04:00:25 -0700 (PDT) Received: from localhost ([84.78.159.3]) by smtp.gmail.com with UTF8SMTPSA id d2e1a72fcca58-7390600a5f6sm13932175b3a.82.2025.03.27.04.00.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Mar 2025 04:00:24 -0700 (PDT) Date: Thu, 27 Mar 2025 12:00:20 +0100 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Naresh Kamboju Cc: Dan Carpenter , PCI , open list , lkft-triage@lists.linaro.org, Linux Regressions , Bjorn Helgaas , Thomas Gleixner , Andy Shevchenko , shivamurthy.shastri@linutronix.de, Manivannan Sadhasivam , Anders Roxell , Arnd Bergmann , Linus Torvalds , Sasha Levin Subject: Re: next-20250324: x86_64: BUG: kernel NULL pointer dereference __pci_enable_msi_range Message-ID: References: Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Thu, Mar 27, 2025 at 02:10:21PM +0530, Naresh Kamboju wrote: > On Tue, 25 Mar 2025 at 20:23, Roger Pau Monné wrote: > > > > On Tue, Mar 25, 2025 at 04:56:33PM +0300, Dan Carpenter wrote: > > > If I had to guess, I'd say that it was related to Fixes: d9f2164238d8 > > > ("PCI/MSI: Convert pci_msi_ignore_mask to per MSI domain flag"). I > > > suspect d->host_data can be NULL. I could be wrong, but let's add Roger > > > to the CC list just in case. > > > > Indeed, sorry. There's a patch from Thomas to switch to using > > pci_msi_domain_supports() for fetching the flag, as there's no > > guarantee all call contexts will have an associated msi_domain_info: > > Thanks Roger for the clarification. > LKFT started noticing this issue on the Linus Torvalds master branch from > March 26, 2025 at git describe: v6.14-1979-g61af143fbea4 > > Anders bisected and confirmed that, > # first bad commit: > [c3164d2e0d181027da8fc94f8179d8607c3d440f] > PCI/MSI: Convert pci_msi_ignore_mask to per MSI domain flag > Hello, The fix has already been committed to Linux master, commit hash 3ece3e8e5976c49c3f887e5923f998eabd54ff40. Regards, Roger.