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Mon, 26 Jan 2026 10:57:29 -0800 (PST) MIME-Version: 1.0 References: <6ba903ad-9897-42bb-8c2d-337385cc3746@molgen.mpg.de> <49cdd663-bcbd-48b4-ac38-77ce94ef0c8d@molgen.mpg.de> In-Reply-To: From: Sudip Mukherjee Date: Mon, 26 Jan 2026 18:56:52 +0000 X-Gm-Features: AZwV_QhUnyzIrspUJHMl5wxPaQZIKc2UPXxov3UABxIDoJiLKH6ZmgxeZIssq8Y Message-ID: Subject: Re: BUG: kernel NULL pointer dereference, address: 0000000000000000 To: Salvatore Bonaccorso Cc: Paul Menzel , Sudip Mukherjee , linux-kernel@vger.kernel.org, Andrew Morton , linux-mm@kvack.org, regressions@lists.linux.dev, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Giuseppe Sacco Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam12 X-Stat-Signature: fod3kg8r7ex1p4g9brn68yymfh4ox3ws X-Rspamd-Queue-Id: DD6371C0016 X-Rspam-User: X-HE-Tag: 1769453850-649148 X-HE-Meta: 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 FSGvnGjh x7yeoZ9bzG60lDJvH953Yu9qu3xup9AB36/EZHMB1vGB17YR2tfklxQk0+Sf0MphyTCXuJtbjYtiMYkVLKZ10h0xWw+ia1yOZEzxkqPXnhqpK0HbI7wwOHoz1aPw1ioKWELkTALMRJKc/oVxYBO2aBqlq3A+4TqzGe6YeiNOM6MxO6hX3eYCMsqqvE9jSjZlXbCSjFkmQNJ0mhLdrnsF1y65D/WgLRQ19cIAdXH6qFh8GNQGeY9GqI4jXF12gbuvHmBUaUf7nj76zkZqczozJxpqYMMmRt3rQzsWcRgiJupxwAtONUWTBSwsOT5rafs5lxqHXBjamfW/+9BdsgH7g1uUWbAA9rMSnG6DXl+5f0sMc41v5GtttuXwGjugXz6G+Q+N6js2erlgubdS3l4E2qD7jR3RjMDBZ0y74Kd32nKmeOGJmc+r0NI3/U6O+RxeNPgfnyZFxDVLSph0= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Salvatore, On Thu, 22 Jan 2026 at 09:59, Salvatore Bonaccorso wrote: > > Hi Sudip, > > On Sat, Jan 03, 2026 at 11:33:47AM +0000, Sudip Mukherjee wrote: > > On Sat, Jan 03, 2026 at 12:01:19PM +0600, Paul Menzel wrote: > > > Dear Salvatore, > > > > > > > > > Thank you for the follow-up. > > > > > We had another report (https://bugs.debian.org/1126128_ but the > problem remains here as well the reproducibilty. Uppon several reboots > only the first one so far showed the problem and was not reproducible > afterwards. I was going to post the patch today but since you have asked the reporter of the last bug to test it so lets wait for few more days. About the problem showing on the first boot, does that mean that its only seen on a cold boot ? and not seen on reboots (reboots without power cycle) ? Can it be reproduced if the system is powered-off and then powering it on ? -- Regards Sudip