On 19/03/20 15:49, Sean Christopherson wrote: > On Thu, Mar 19, 2020 at 03:35:16AM -0700, syzbot wrote: >> syzbot has found a reproducer for the following crash on: >> >> HEAD commit: 5076190d mm: slub: be more careful about the double cmpxch.. >> git tree: upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=143ca61de00000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=9f894bd92023de02 >> dashboard link: https://syzkaller.appspot.com/bug?extid=00be5da1d75f1cc95f6b >> compiler: gcc (GCC) 9.0.0 20181231 (experimental) >> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10bb4023e00000 >> >> IMPORTANT: if you fix the bug, please add the following tag to the commit: >> Reported-by: syzbot+00be5da1d75f1cc95f6b@xxxxxxxxxxxxxxxxxxxxxxxxx > Reproduced with a little tweaking of the reproducer, debug in progress. > I think the WARN_ON at x86.c:2447 is just bogus. You can always get it to trigger if garbage is passed to KVM_SET_CLOCK. Paolo
