In the Linux kernel, the following vulnerability has been resolved: iomap: allocate s_dio_done_wq for async reads as well Since commit 222f2c7c6d14 ("iomap: always run error completions in user context"), read error completions are deferred to s_dio_done_wq. This means the workqueue also needs to be allocated for async reads.
https://git.kernel.org/stable/c/c67775cf0da2407f113c1229e350758f4dca0f51
https://git.kernel.org/stable/c/7fd8720dff2d9c70cf5a1a13b7513af01952ec02
https://git.kernel.org/stable/c/51297686e00f4d5d941b0f20f12b2f12879d753c