On 05/12/19 12:27, Dmitry Vyukov wrote: > Oh, you mean the final bisection crash. Indeed it contains a kvm frame > and it turns out to be a bug in syzkaller code that indeed > misattributed it to kvm instead of netfilter. > Should be fixed now, you may read the commit message for details: > https://github.com/google/syzkaller/commit/4fb74474cf0af2126be3a8989d770c3947ae9478 > > Overall this "making sense out of kernel output" task is the ultimate > insanity, you may skim through this file to get a taste of amount of > hardcoding and special corner cases that need to be handled: > https://github.com/google/syzkaller/blob/master/pkg/report/linux.go > And this is never done, such "exception from exception corner case" > things pop up every week. There is always something to shuffle and > tune. It only keeps functioning due to 500+ test cases for all > possible insane kernel outputs: > https://github.com/google/syzkaller/tree/master/pkg/report/testdata/linux/report > https://github.com/google/syzkaller/tree/master/pkg/report/testdata/linux/guilty > > So thanks for persisting and questioning! We are getting better with > each new test. Thanks to you! I "complain" because I know you're so responsive. :) Paolo
