Am Sonntag, 8. Oktober 2017, 12:31:58 CEST schrieb Thomas Meyer: > UMLs current_thread_info() unconditionally assumes that the top of the stack > contains the thread_info structure. But on UML the __sanitizer_cov_trace_pc > function is called for *all* functions! This results in an early crash: > > Prevent kcov from using invalid curent_thread_info() data by checking > the system_state. > > Signed-off-by: Thomas Meyer <tho...@m3y3r.de> > --- > kernel/kcov.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/kernel/kcov.c b/kernel/kcov.c > index 3f693a0f6f3e..d601c0e956f6 100644 > --- a/kernel/kcov.c > +++ b/kernel/kcov.c > @@ -56,6 +56,12 @@ void notrace __sanitizer_cov_trace_pc(void) > struct task_struct *t; > enum kcov_mode mode; > > +#ifdef CONFIG_UML > + if(!(system_state == SYSTEM_SCHEDULING || > + system_state == SYSTEM_RUNNING)) > + return; > +#endif
Hmm, and why does it work on all other archs then? Thanks, //richard ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel
