Alexander,
On Tue, Dec 14 2021 at 17:20, Alexander Potapenko wrote:
> When calling KMSAN-instrumented functions from non-instrumented
> functions, function parameters may not be initialized properly, leading
> to false positive reports. In particular, this happens all the time when
> calling interrupt handlers from `noinstr` IDT entries.
>
> Fortunately, x86 code has instrumentation_begin() and
It's not only x86 code:
> kernel/entry/common.c | 3 +++
> @@ -76,6 +77,7 @@ __visible noinstr void do_syscall_64(struct pt_regs *regs, int nr)
> nr = syscall_enter_from_user_mode(regs, nr);
>
> instrumentation_begin();
> + kmsan_instrumentation_begin(regs);
Can we please make this something like:
instrumentation_begin_at_entry(regs);
or some other sensible name which hides that kmsan gunk and avoids to
touch all of this again when KFOOSAN comes around?
Thanks,
tglx
