On 09/12/2024 14:06, Bernd Schubert wrote: > On 12/9/24 10:07, Malte Schröder wrote: >> [You don't often get email from malte.schroeder@xxxxxxxx. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] >> >> On 09/12/2024 09:06, Bernd Schubert wrote: >>> Hi Malte, >>> >>> On 12/9/24 07:42, Malte Schröder wrote: >>>> On 09/12/2024 02:57, Jingbo Xu wrote: >>>>> Hi, Malte >>>>> >>>>> On 12/9/24 6:32 AM, Malte Schröder wrote: >>>>>> On 08/12/2024 21:02, Malte Schröder wrote: >>>>>>> On 08/12/2024 02:23, Matthew Wilcox wrote: >>>>>>>> On Sun, Dec 08, 2024 at 12:01:11AM +0100, Malte Schröder wrote: >>>>>>>>> Reverting fb527fc1f36e252cd1f62a26be4906949e7708ff fixes the issue for >>>>>>>>> me. >>>>>>>> That's a merge commit ... does the problem reproduce if you run >>>>>>>> d1dfb5f52ffc? And if it does, can you bisect the problem any further >>>>>>>> back? I'd recommend also testing v6.12-rc1; if that's good, bisect >>>>>>>> between those two. >>>>>>>> >>>>>>>> If the problem doesn't show up with d1dfb5f52ffc? then we have a dilly >>>>>>>> of an interaction to debug ;-( >>>>>>> I spent half a day compiling kernels, but bisect was non-conclusive. >>>>>>> There are some steps where the failure mode changes slightly, so this is >>>>>>> hard. It ended up at 445d9f05fa149556422f7fdd52dacf487cc8e7be which is >>>>>>> the nfsd-6.13 merge ... >>>>>>> >>>>>>> d1dfb5f52ffc also shows the issue. I will try to narrow down from there. >>>>>>> >>>>>>> /Malte >>>>>>> >>>>>> Ha! This time I bisected from f03b296e8b51 to d1dfb5f52ffc. I ended up >>>>>> with 3b97c3652d91 as the culprit. >>>>> Would you mind checking if [1] fixes the issue? It is a fix for >>>>> 3b97c3652d91, though the initial report shows 3b97c3652d91 will cause >>>>> null-ptr-deref. >>>>> >>>>> >>>>> [1] >>>>> https://lore.kernel.org/all/20241203-fix-fuse_get_user_pages-v2-1-acce8a29d06b@xxxxxxx/ >>>> It does not fix the issue, still behaves the same. >>>> >>> could you give instructions how to get the issue? Maybe we can script it and I let >>> it run in a loop on one my systems? >>> >>> >>> Thanks, >>> Bernd >> Sure. To reproduce I set up a VM running Arch and bcachefs as rootfs >> (Works out of the box on current Arch). Build -rc kernel using >> pacman-pkg build target. Try to install FreeCAD, "flatpak install >> flathub org.freecad.FreeCAD". Usually it fails to download some >> dependencies. It's a pretty wonky test, but I didn't find a more >> specific way to reproduce this. >> > What is the relation to fuse here? pacmang-pkg or 'flatpak' are using > fuse internally? > > > Thanks, > Bernd Flatpak is using fuse when downloading/installing packages /Malte
