CVE-2025-40107can: hi311x: fix null pointer dereference when resuming from sleep before interface was enabled

Official description

In the Linux kernel, the following vulnerability has been resolved: can: hi311x: fix null pointer dereference when resuming from sleep before interface was enabled This issue is similar to the vulnerability in the `mcp251x` driver, which was fixed in commit 03c427147b2d ("can: mcp251x: fix resume from sleep before interface was brought up"). In the `hi311x` driver, when the device resumes from sleep, the driver schedules `priv->restart_work`. However, if the network interface was not previously enabled, the `priv->wq` (workqueue) is not allocated and initialized, leading to a null pointer dereference. To fix this, we move the allocation and initialization of the workqueue from the `hi3110_open` function to the `hi3110_can_probe` function. This ensures that the workqueue is properly initialized before it is used during device resume. And added logic to destroy the workqueue in the error handling paths of `hi3110_can_probe` and in the `hi3110_can_remove` function to prevent resource leaks.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/d1fc4c041459e2d4856c1b2501486ba4f0cbf96b
• https://git.kernel.org/stable/c/e93af787187e585933570563c643337fa731584a
• https://git.kernel.org/stable/c/1d2ef21f02baff0c109ad78b9e835fb4acb14533
• https://git.kernel.org/stable/c/fd00cf38fd437c979f0e5905e3ebdfc3f55a4b96
• https://git.kernel.org/stable/c/6b696808472197b77b888f50bc789a3bae077743