diff options
| -rw-r--r-- | io_uring/io_uring.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 29a0516ee5ce..fb7215b543cd 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1332,9 +1332,9 @@ void __io_req_task_work_add(struct io_kiocb *req, bool allow_local) struct io_ring_ctx *ctx = req->ctx; if (allow_local && ctx->flags & IORING_SETUP_DEFER_TASKRUN) { - percpu_ref_get(&ctx->refs); + rcu_read_lock(); io_req_local_work_add(req); - percpu_ref_put(&ctx->refs); + rcu_read_unlock(); return; } @@ -3052,6 +3052,10 @@ static __cold void io_ring_exit_work(struct work_struct *work) spin_lock(&ctx->completion_lock); spin_unlock(&ctx->completion_lock); + /* pairs with RCU read section in io_req_local_work_add() */ + if (ctx->flags & IORING_SETUP_DEFER_TASKRUN) + synchronize_rcu(); + io_ring_ctx_free(ctx); } |