Commit-ID: dbdb22754fde671dc93d2fae06f8be113d47f2fb Gitweb: http://git.kernel.org/tip/dbdb22754fde671dc93d2fae06f8be113d47f2fb Author: Peter Zijlstra <[email protected]> AuthorDate: Fri, 9 May 2014 10:49:03 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Thu, 22 May 2014 10:21:26 +0200
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. Reported-by: Michael Kerrisk <[email protected]> Signed-off-by: Peter Zijlstra <[email protected]> Acked-by: Michael Kerrisk <[email protected]> Cc: <[email protected]> Cc: Linus Torvalds <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- 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-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
