Commit-ID: 438367fbfe307f2c26ee8e490f1fb9eacb6b6b02 Gitweb: http://git.kernel.org/tip/438367fbfe307f2c26ee8e490f1fb9eacb6b6b02 Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Fri, 9 May 2014 10:49:03 +0200 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitDate: Mon, 19 May 2014 21:47:33 +0900 sched: Disallow sched_attr::sched_policy < 0 The scheduler uses policy=-1 to preserve the current policy state to implement sys_sched_setparam(), this got exposed to userspace by accident through sys_sched_setattr(), cure this. Cc: stable@xxxxxxxxxxxxxxx Reported-by: Michael Kerrisk <mtk.manpages@xxxxxxxxx> Acked-by: Michael Kerrisk <mtk.manpages@xxxxxxxxx> Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/20140509085311.GJ30445@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- kernel/sched/core.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index f2205f0..cdefcf7 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3662,6 +3662,9 @@ SYSCALL_DEFINE3(sched_setattr, pid_t, pid, struct sched_attr __user *, uattr, if (retval) return retval; + if (attr.sched_policy < 0) + return -EINVAL; + rcu_read_lock(); retval = -ESRCH; p = find_process_by_pid(pid); -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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