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
