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 heiko.carstens@de.ibm.com
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)
[...]