On Tue, 2017-11-28 at 11:22 +0100, Greg Kroah-Hartman wrote: > 4.4-stable review patch. If anyone has any objections, please let me know. > > ------------------ > > From: Heiko Carstens <[email protected]> > > commit d6e646ad7cfa7034d280459b2b2546288f247144 upstream. [...] > --- a/arch/s390/kernel/runtime_instr.c > +++ b/arch/s390/kernel/runtime_instr.c > @@ -47,11 +47,13 @@ void exit_thread_runtime_instr(void) > { > struct task_struct *task = current; > > + preempt_disable(); > if (!task->thread.ri_cb) > return;
This return path now leaves preemption disabled. This seems to have been fixed upstream by commit 8d9047f8b967 "s390/runtime instrumentation: simplify task exit handling". Ben. > disable_runtime_instr(); > kfree(task->thread.ri_cb); > task->thread.ri_cb = NULL; > + preempt_enable(); > } > > SYSCALL_DEFINE1(s390_runtime_instr, int, command) [...] -- Ben Hutchings Software Developer, Codethink Ltd.
