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| author | Waiman Long <longman@redhat.com> | 2022-09-22 14:00:41 -0400 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-27 11:01:22 +0200 |
| commit | 851a723e45d1c4c8f6f7b0d2cfbc5f53690bb4e9 (patch) | |
| tree | 29fd78c23541482be77e972ac9a55d3a50365da3 /kernel/sched | |
| parent | da019032819a1f09943d3af676892ec8c627668e (diff) | |
| download | linux-851a723e45d1c4c8f6f7b0d2cfbc5f53690bb4e9.tar.bz2 | |
sched: Always clear user_cpus_ptr in do_set_cpus_allowed()
The do_set_cpus_allowed() function is used by either kthread_bind() or
select_fallback_rq(). In both cases the user affinity (if any) should be
destroyed too.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220922180041.1768141-6-longman@redhat.com
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 283bdbd8c3c1..87c9cdf37a26 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2593,14 +2593,20 @@ __do_set_cpus_allowed(struct task_struct *p, struct affinity_context *ctx) set_next_task(rq, p); } +/* + * Used for kthread_bind() and select_fallback_rq(), in both cases the user + * affinity (if any) should be destroyed too. + */ void do_set_cpus_allowed(struct task_struct *p, const struct cpumask *new_mask) { struct affinity_context ac = { .new_mask = new_mask, - .flags = 0, + .user_mask = NULL, + .flags = SCA_USER, /* clear the user requested mask */ }; __do_set_cpus_allowed(p, &ac); + kfree(ac.user_mask); } int dup_user_cpus_ptr(struct task_struct *dst, struct task_struct *src, |