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Wysocki" , Len Brown , inux-pm@vger.kernel.org From: Jens Axboe Subject: Bug: d0e936adbd22 crashes at boot Message-ID: <942f4041-e4e7-1b08-3301-008ab37ff5b8@kernel.dk> Date: Fri, 3 Sep 2021 07:36:27 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Booting Linus's tree causes a crash on my laptop, an x1 gen9. This was a bit difficult to pin down as it crashes before the display is up, but I managed to narrow it down to: commit d0e936adbd2250cb03f2e840c6651d18edc22ace Author: Srinivas Pandruvada Date: Thu Aug 19 19:40:06 2021 -0700 cpufreq: intel_pstate: Process HWP Guaranteed change notification which crashes with a NULL pointer deref in notify_hwp_interrupt() -> queue_delayed_work_on(). Reverting this change makes the laptop boot fine again. -- Jens Axboe