On Wed, Jun 21, 2017 at 10:53 AM, Andrey Konovalov <andreyk...@google.com> wrote: > On Wed, Jun 21, 2017 at 3:09 PM, Andrey Konovalov <andreyk...@google.com> > wrote: >> On Wed, Jun 21, 2017 at 2:08 PM, Andrey Konovalov <andreyk...@google.com> >> wrote: >>> Hi, >>> >>> I've got the following error report while fuzzing the kernel with syzkaller. >>> >>> On commit 9705596d08ac87c18aee32cc97f2783b7d14624e (4.12-rc6+). >>> >>> It might be related to: >>> https://groups.google.com/forum/#!topic/syzkaller/ZJaqAiFLe3k >>> >>> I only have a reproducer in the form of a syzkaller program, attached >>> together with my .config. >> >> I now have a C reproducer as well, attached. > > And here's a much simpler reproducer.
Thanks a lot for your reproducer! I added a few printk's, and find that we somehow have rt->rt6i_idev set to NULL but still keep it in the uncached list. ip6_dst_destroy() unlinks it before NULL'ing, so it should not be that case.
