On Thu, Oct 19, 2017 at 10:16:08PM -0400, Wei Wei wrote: > Hi all, Hi,
> I have fuzzed v4.14-rc3 using syzkaller and found a bug similar to that one > [1]. > But the call trace isn’t the same. The atomic_inc() might handle a corrupted > skb_buff. > > The logs and config have been uploaded to my github repo [2]. > > [1] https://lkml.org/lkml/2017/10/2/216 > [2] https://github.com/dotweiba/skb_clone_atomic_inc_bug These do look very similar to what I was hitting; all appear to be misaligned atomics in the same path. I see that you have some empty repro files in [2]. If you have any reproducers, would you mind sharing them? If any of those are smaller or more reliable than the one I was able to generate [3], it might make it more obvious what's going on, and/or make it simpler to come up with a plain C reproducer. Thanks, Mark. [3] https://www.kernel.org/pub/linux/kernel/people/mark/bugs/20171002-skb_clone-misaligned-atomic/syzkaller.repro
