On Wed, May 17, 2023 at 07:12:23PM +0800, yang lan wrote: > root@syzkaller:~# uname -a > Linux syzkaller 5.10.179 #1 SMP PREEMPT Thu Apr 27 16:22:48 CST 2023 Does this reproduce on current kernels, eg 6.4-rc2? > root@syzkaller:~# gcc poc_blkdev.c -o poc_blkdev You need to include poc_blkdev.c as part of your report. > Please let me know if I can provide any more information, and I hope I > didn't mess up this bug report. I suspect you've done something that is known to not work (as root, so we won't necessarily care). But I can't really say without seeing what you've done. Running syzkaller is an art, and most people aren't good at it. It takes a lot of work to submit good quality bug reports, see this article: https://blog.regehr.org/archives/2037