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@xxxxxxxxxxxxxx/ > > The third: > https://lore.kernel.org/all/9274d9bd3d080a457649ff5addcc1726f08ef5b2.camel@xxxxxxxxxxx/ > > 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@xxxxxxxxxxxx/ Ciao, Thorsten > This many reports about a problem at this stage of the cycle makes me > suspect we'll see a lot more once -rc1 is out. That's why I raising the > awareness of this. Sadly a simple revert of just this commit is not > possible. :-/ > > Ciao, Thorsten > >> commit 19898ce9cf8a33e0ac35cb4c7f68de297cc93cb2 (refs/bisect/bad) >> Author: Johannes Berg <johannes.berg@xxxxxxxxx> >> AuthorDate: Wed Jun 21 13:12:07 2023 +0300 >> Commit: Johannes Berg <johannes.berg@xxxxxxxxx> >> CommitDate: Wed Jun 21 14:07:00 2023 +0200 >> >> wifi: iwlwifi: split 22000.c into multiple files >> >> Split the configuration list in 22000.c into four new files, >> per new device family, so we don't have this huge unusable >> file. Yes, this duplicates a few small things, but that's >> still much better than what we have now. >> >> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> >> Signed-off-by: Gregory Greenman <gregory.greenman@xxxxxxxxx> >> Link: >> https://lore.kernel.org/r/20230621130443.7543603b2ee7.Ia8dd54216d341ef1ddc0531f2c9aa30d30536a5d@changeid >> Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> >> >> I have some screenshots which show that RIP points to iwl_mem_free_skb, >> I can create a kernel bugzilla and attach the screenshots there if >> needed. >> >> BTW, lspci output of the wifi device and git bisect log attached. >> >> If any other information needed, please let me know. > > -- > Everything you wanna know about Linux kernel regression tracking: > https://linux-regtracking.leemhuis.info/about/#tldr > That page also explains what to do if mails like this annoy you. > > P.S.: for regzbot > > #regzbot ^introduced 19898ce9cf8a > #regzbot dup-of: > https://lore.kernel.org/all/a5cdc7f8-b340-d372-2971-0d24b01de217@xxxxxxxxx/
