Re: WARNING in __mark_chain_precision (2)

syzbot has bisected this bug to:

commit e786741ff1b52769b044b7f4407f39cd13ee5d2d
Author: Linus Torvalds [off-list ref]
Date:   Thu Jul 11 22:36:02 2019 +0000

     Merge tag 'staging-5.3-rc1' of  
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11958f12600000
start commit:   47ee6e86 selftests/bpf: remove wrong nhoff in flow dissect..
git tree:       bpf-next
final crash:    https://syzkaller.appspot.com/x/report.txt?x=13958f12600000
console output: https://syzkaller.appspot.com/x/log.txt?x=15958f12600000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d4cf1ffb87d590d7
dashboard link: https://syzkaller.appspot.com/bug?extid=c8d66267fd2b5955287e
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10d26ebc600000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=127805ca600000

Reported-by: syzbot+c8d66267fd2b5955287e@syzkaller.appspotmail.com
Fixes: e786741ff1b5 ("Merge tag 'staging-5.3-rc1' of  
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection