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Sun, 09 Jul 2023 09:28:04 -0700 (PDT) Received: from [192.168.1.119] ([216.130.59.33]) by smtp.gmail.com with ESMTPSA id n5-20020aca2405000000b003a1f444307esm3367199oic.58.2023.07.09.09.28.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 09 Jul 2023 09:28:03 -0700 (PDT) Sender: Larry Finger Message-ID: Date: Sun, 9 Jul 2023 11:28:02 -0500 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.12.0 Subject: Re: [Regression][BISECTED] kernel boot hang after 19898ce9cf8a ("wifi: iwlwifi: split 22000.c into multiple files") To: "Zhang, Rui" , "Greenman, Gregory" , "Berg, Johannes" , "regressions@lists.linux.dev" Cc: "bagasdotme@gmail.com" , "davem@davemloft.net" , "netdev@vger.kernel.org" , "kvalo@kernel.org" , "Baruch, Yaara" , "linux-kernel@vger.kernel.org" , "linux-wireless@vger.kernel.org" , "Torvalds, Linus" , "Ben Ami, Golan" , "edumazet@google.com" , "Sisodiya, Mukesh" , "kuba@kernel.org" , "pabeni@redhat.com" References: <4153ce0aac6dc760a3a9c7204c5c9141b60839a4.camel@intel.com> Content-Language: en-US From: Larry Finger In-Reply-To: <4153ce0aac6dc760a3a9c7204c5c9141b60839a4.camel@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,NICE_REPLY_A,RCVD_IN_DNSWL_BLOCKED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net On 7/9/23 08:27, Zhang, Rui wrote: > On Sat, 2023-07-08 at 16:17 +0200, Thorsten Leemhuis wrote: >> On 07.07.23 12:55, Linux regression tracking (Thorsten Leemhuis) >> wrote: >>> On 07.07.23 10:25, Zhang, Rui wrote: >>>> >>>> I run into a NULL pointer dereference and kernel boot hang after >>>> switching to latest upstream kernel, and git bisect shows that >>>> below >>>> commit is the first offending commit, and I have confirmed that >>>> commit >>>> 19898ce9cf8a has the issue while 19898ce9cf8a~1 does not. >>> >>> FWIW, this is the fourth such report about this that I'm aware of. >>> >>> The first is this one (with two affected users afaics): >>> https://bugzilla.kernel.org/show_bug.cgi?id=217622 >>> >>> The second is this one: >>> https://lore.kernel.org/all/CAAJw_Zug6VCS5ZqTWaFSr9sd85k%3DtyPm9DEE%2BmV%3DAKoECZM%2BsQ@mail.gmail.com/ >>> >>> The third: >>> https://lore.kernel.org/all/9274d9bd3d080a457649ff5addcc1726f08ef5b2.camel@xry111.site/ >>> >>> And in the past few days two people from Fedora land talked to me >>> on IRC >>> with problems that in retrospective might be caused by this as >>> well. >> >> I got confirmation: one of those cases is also caused by 19898ce9cf8a >> But I write for a different reason: >> >> Larry (now CCed) looked at the culprit and spotted something that >> looked >> suspicious to him; he posted a patch and looks for testers: >> https://lore.kernel.org/all/0068af47-e475-7e8d-e476-c374e90dff5f@lwfinger.net/ > > I applied this patch but the problem still exists. > > thanks, > rui Rui, I am not surprised that the patch did not help. I guess you will need to stay with kernel 6.3.X until the Intel developers return from their summer break. Larry