From: Quentin Perret Date: Tue, 27 Jul 2021 10:11:02 +0000 (+0100) Subject: sched: Don't report SCHED_FLAG_SUGOV in sched_getattr() X-Git-Tag: libata-5.15-2021-09-05~94^2~19 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=7ad721bf10718a4e480a27ded8bb16b8f6feb2d1;p=linux-2.6-block.git sched: Don't report SCHED_FLAG_SUGOV in sched_getattr() SCHED_FLAG_SUGOV is supposed to be a kernel-only flag that userspace cannot interact with. However, sched_getattr() currently reports it in sched_flags if called on a sugov worker even though it is not actually defined in a UAPI header. To avoid this, make sure to clean-up the sched_flags field in sched_getattr() before returning to userspace. Signed-off-by: Quentin Perret Signed-off-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20210727101103.2729607-3-qperret@google.com --- diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 6c562ad1ad5d..314f70db3e5c 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7530,6 +7530,7 @@ SYSCALL_DEFINE4(sched_getattr, pid_t, pid, struct sched_attr __user *, uattr, kattr.sched_priority = p->rt_priority; else kattr.sched_nice = task_nice(p); + kattr.sched_flags &= SCHED_FLAG_ALL; #ifdef CONFIG_UCLAMP_TASK /*