On Tue, Jun 19, 2018 at 3:04 PM, Jason A. Donenfeld <Jason@xxxxxxxxx> wrote: > HI Dimitry, > > On Tue, Jun 19, 2018 at 6:55 AM Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote: >> Your code frees all entries before freeing the cache, right? If you >> add total_entries check before freeing the cache, it does not fire, >> right? > > Yes, certainly. > >> Are you using SLAB or SLUB? We stress kernel pretty heavily, but with >> SLAB, and I suspect Shakeel may also be using SLAB. So if you are >> using SLUB, there is significant chance that it's a bug in the SLUB >> part of the change. > > Nice intuition; I am indeed using SLUB rather than SLAB... Now the reasonable question is: does SLUB path of f9e13c0a5a33d1eaec374d6d4dab53a4f72756a0 have a bug? syzbot has stressed SLAB version to death, and any such issues would pop up very loudly, but I am not sure what is the amount of testing for SLUB.
