Re: [PATCH 1/8] kasan,x86: Frob kasan_report() in an exception

[Peter Zijlstra]

On Wed, Mar 06, 2019 at 03:40:51PM +0100, Dmitry Vyukov wrote:
> On Wed, Mar 6, 2019 at 3:34 PM Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

> > mm/kasan/generic_report.o: warning: objtool: __asan_report_load1_noabort()+0x0: call to __fentry__() with UACCESS enabled

> But if it makes things simpler for the objtool, then I think we can
> disable function tracer for generic_report.c too.

It's not simpler; it is actually a correctness issue. Those functions
must not call into the tracer with AC=1