On Fri, 22 May 2020 09:52:07 +0200 Marco Elver <elver@xxxxxxxxxx> wrote: > During early boot, while KASAN is not yet initialized, it is possible to > enter reporting code-path and end up in kasan_report(). While > uninitialized, the branch there prevents generating any reports, > however, under certain circumstances when branches are being traced > (TRACE_BRANCH_PROFILING), we may recurse deep enough to cause kernel > reboots without warning. > > To prevent similar issues in future, we should disable branch tracing > for the core runtime. > > Link: https://lore.kernel.org/lkml/20200517011732.GE24705@shao2-debian/ > Reported-by: kernel test robot <rong.a.chen@xxxxxxxxx> > Signed-off-by: Marco Elver <elver@xxxxxxxxxx> I assume this affects 5.6 and perhaps earlier kernels? I also assume that a cc:stable is appropriate for this fix?
