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| author | Peter Zijlstra <peterz@infradead.org> | 2022-02-14 10:16:57 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-02-19 11:11:05 +0100 |
| commit | b1e8206582f9d680cff7d04828708c8b6ab32957 (patch) | |
| tree | 75b3f3e6b2a396995b68db17b96efa51b4e499a6 /include | |
| parent | 754e0b0e35608ed5206d6a67a791563c631cec07 (diff) | |
| download | linux-stable-b1e8206582f9d680cff7d04828708c8b6ab32957.tar.gz linux-stable-b1e8206582f9d680cff7d04828708c8b6ab32957.tar.bz2 linux-stable-b1e8206582f9d680cff7d04828708c8b6ab32957.zip | |
sched: Fix yet more sched_fork() races
Where commit 4ef0c5c6b5ba ("kernel/sched: Fix sched_fork() access an
invalid sched_task_group") fixed a fork race vs cgroup, it opened up a
race vs syscalls by not placing the task on the runqueue before it
gets exposed through the pidhash.
Commit 13765de8148f ("sched/fair: Fix fault in reweight_entity") is
trying to fix a single instance of this, instead fix the whole class
of issues, effectively reverting this commit.
Fixes: 4ef0c5c6b5ba ("kernel/sched: Fix sched_fork() access an invalid sched_task_group")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Tadeusz Struk <tadeusz.struk@linaro.org>
Tested-by: Zhang Qiao <zhangqiao22@huawei.com>
Tested-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Link: https://lkml.kernel.org/r/YgoeCbwj5mbCR0qA@hirez.programming.kicks-ass.net
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/sched/task.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h index b9198a1b3a84..e84e54d1b490 100644 --- a/include/linux/sched/task.h +++ b/include/linux/sched/task.h @@ -54,8 +54,8 @@ extern asmlinkage void schedule_tail(struct task_struct *prev); extern void init_idle(struct task_struct *idle, int cpu); extern int sched_fork(unsigned long clone_flags, struct task_struct *p); -extern void sched_post_fork(struct task_struct *p, - struct kernel_clone_args *kargs); +extern void sched_cgroup_fork(struct task_struct *p, struct kernel_clone_args *kargs); +extern void sched_post_fork(struct task_struct *p); extern void sched_dead(struct task_struct *p); void __noreturn do_task_dead(void); |