Re: refcount_t: underflow; use-after-free with CIFS umount after scsi-misc commit ef2cc88e2a205b8a11a19e78db63a70d3728cdf5

[Linus Torvalds]

On Sun, Dec 8, 2019 at 6:52 PM Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
>
> FWIW, the thing that is IME absolutely incompatible with bisection
> is CONFIG_GCC_PLUGIN_RANDSTRUCT.  It can affect frequencies badly
> enough, even in the cases when the bug isn't directly dependent
> upon that thing.

It will easily affect timing in major ways, yes.

You're right that at least the CI bots might want to disable it for
bisecting. Or force a particular seed for RANDSTRUCT - I seem to
recall that there was some way to make it be at least repeatable for
any particular structure.

         Linus