[PATCHv7 6/6] io_uring: cache nodes and mapped buffers

[Jens Axboe]

On 2/26/25 11:21 AM, Keith Busch wrote:
> @@ -789,7 +856,7 @@ static struct io_rsrc_node *io_sqe_buffer_register(struct io_ring_ctx *ctx,
>  	}
>  done:
>  	if (ret) {
> -		kvfree(imu);
> +		io_free_imu(ctx, imu);
>  		if (node)
>  			io_put_rsrc_node(ctx, node);
>  		node = ERR_PTR(ret);

'imu' can be NULL here in the error path, which this is. That was fine
before with kvfree(), but it'll bomb now. Best fix is probably just to
check for non-NULL before calling io_free_imu(), as other paths should
be fine.

-- 
Jens Axboe