From: Thomas Gleixner <tglx@linutronix.de>
Date: Fri, 4 May 2018 07:40:03 +0000 (+0200)
Subject: seccomp: Use PR_SPEC_FORCE_DISABLE
X-Git-Tag: v4.14.43~27
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d829fcceb8f532966bfb07fb67cb968374fcbbd2;p=platform%2Fkernel%2Flinux-exynos.git

seccomp: Use PR_SPEC_FORCE_DISABLE

commit b849a812f7eb92e96d1c8239b06581b2cfd8b275 upstream

Use PR_SPEC_FORCE_DISABLE in seccomp() because seccomp does not allow to
widen restrictions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 55f20ae..6f22d9d 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -239,7 +239,7 @@ static inline void spec_mitigate(struct task_struct *task,
 	int state = arch_prctl_spec_ctrl_get(task, which);
 
 	if (state > 0 && (state & PR_SPEC_PRCTL))
-		arch_prctl_spec_ctrl_set(task, which, PR_SPEC_DISABLE);
+		arch_prctl_spec_ctrl_set(task, which, PR_SPEC_FORCE_DISABLE);
 }
 
 static inline void seccomp_assign_mode(struct task_struct *task,