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io_uring: don't check PF_EXITING from syscall
io_sq_thread_acquire_mm_files() can find a PF_EXITING task only when it's called from task_work context. Don't check it in all other cases, that are when we're in io_uring_enter(). Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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1 changed files with 2 additions and 3 deletions
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@ -1213,8 +1213,6 @@ static int __io_sq_thread_acquire_mm_files(struct io_ring_ctx *ctx,
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static inline int io_sq_thread_acquire_mm_files(struct io_ring_ctx *ctx,
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static inline int io_sq_thread_acquire_mm_files(struct io_ring_ctx *ctx,
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struct io_kiocb *req)
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struct io_kiocb *req)
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{
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{
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if (unlikely(current->flags & PF_EXITING))
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return -EFAULT;
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if (!(ctx->flags & IORING_SETUP_SQPOLL))
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if (!(ctx->flags & IORING_SETUP_SQPOLL))
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return 0;
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return 0;
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return __io_sq_thread_acquire_mm_files(ctx, req);
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return __io_sq_thread_acquire_mm_files(ctx, req);
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@ -2338,7 +2336,8 @@ static void __io_req_task_submit(struct io_kiocb *req)
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/* ctx stays valid until unlock, even if we drop all ours ctx->refs */
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/* ctx stays valid until unlock, even if we drop all ours ctx->refs */
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mutex_lock(&ctx->uring_lock);
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mutex_lock(&ctx->uring_lock);
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if (!ctx->sqo_dead && !io_sq_thread_acquire_mm_files(ctx, req))
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if (!ctx->sqo_dead && !(current->flags & PF_EXITING) &&
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!io_sq_thread_acquire_mm_files(ctx, req))
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__io_queue_sqe(req);
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__io_queue_sqe(req);
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else
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else
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__io_req_task_cancel(req, -EFAULT);
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__io_req_task_cancel(req, -EFAULT);
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