On Thu, Nov 09, 2023 at 09:00:18PM -0800, Aleksandr Nogikh wrote: > > The reproducer does work on the attached disk image, but definitely > not very often. I've just run it 10 times or so and got interleaved > BUG/KFENCE bug reports like this (twice): > https://pastebin.com/W0TkRsnw > > These seem to be related to ext4 rather than hrtimers though. So what would be nice is if there was a way to ask the syzkaller tester to use a different config or to change the reproducer somehow --- for example, is it *really* necessary to twiddle the bluetooth subsystem, as demonstrated by the spew in the console? I've certainly spent hours cutting down the reproducer to a simple C program which is readable by humans, which makes it *clear* the syzbot minimizer doesn't do a good job. Why should a time-limited maintainer spend hours trying to cut down the reproducer, when a robot should be able to do that for us? And when often it doesn't reproduce on anything via syzbot test, but not when run using KVM, this is why we need to have a simple way of trigger a test where things are as close as possible to whatever syzbot is using. Cheers, - Ted
