On 2020/11/19 22:06, Dmitry Vyukov wrote: >>>> >>>> I am trying to reproduce this locally first. syzbot caims it can >>>> reproduce it with a number of very simpler reproducers (like spawn >>>> process, unshare, create socket): >>>> https://syzkaller.appspot.com/bug?id=8a18efe79140782a88dcd098808d6ab20ed740cc >>>> >>>> I see a very slow drift, but it's very slow, so get only to: >>>> direct dependencies: 22072 [max: 32768] >>>> >>>> But that's running a very uniform workload. >>>> >>>> However when I tried to cat /proc/lockdep to see if there is anything >>>> fishy already, >>>> I got this (on c2e7554e1b85935d962127efa3c2a76483b0b3b6). >>>> >>>> Some missing locks?
Not a TOMOYO's bug. Maybe a lockdep's bug. > > But I don't know if it's enough to explain the overflow or not... > Since you can't hit the limit locally, I guess we need to ask syzbot to run massive testcases.