summaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
authorJuri Lelli <juri.lelli@redhat.com>2020-06-17 09:29:19 +0200
committerBorislav Petkov <bp@suse.de>2020-06-28 17:01:20 +0200
commitce9bc3b27f2a21a7969b41ffb04df8cf61bd1592 (patch)
tree161125e9274c8eb6f6cf070e3cc003d404cada93 /kernel
parentfd844ba9ae59b51e34e77105d79f8eca780b3bd6 (diff)
sched/deadline: Initialize ->dl_boosted
syzbot reported the following warning triggered via SYSC_sched_setattr(): WARNING: CPU: 0 PID: 6973 at kernel/sched/deadline.c:593 setup_new_dl_entity /kernel/sched/deadline.c:594 [inline] WARNING: CPU: 0 PID: 6973 at kernel/sched/deadline.c:593 enqueue_dl_entity /kernel/sched/deadline.c:1370 [inline] WARNING: CPU: 0 PID: 6973 at kernel/sched/deadline.c:593 enqueue_task_dl+0x1c17/0x2ba0 /kernel/sched/deadline.c:1441 This happens because the ->dl_boosted flag is currently not initialized by __dl_clear_params() (unlike the other flags) and setup_new_dl_entity() rightfully complains about it. Initialize dl_boosted to 0. Fixes: 2d3d891d3344 ("sched/deadline: Add SCHED_DEADLINE inheritance logic") Reported-by: syzbot+5ac8bac25f95e8b221e7@syzkaller.appspotmail.com Signed-off-by: Juri Lelli <juri.lelli@redhat.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Tested-by: Daniel Wagner <dwagner@suse.de> Link: https://lkml.kernel.org/r/20200617072919.818409-1-juri.lelli@redhat.com
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched/deadline.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 504d2f51b0d6..f63f337c7147 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -2692,6 +2692,7 @@ void __dl_clear_params(struct task_struct *p)
dl_se->dl_bw = 0;
dl_se->dl_density = 0;
+ dl_se->dl_boosted = 0;
dl_se->dl_throttled = 0;
dl_se->dl_yielded = 0;
dl_se->dl_non_contending = 0;