CVE ID:	CVE-2024-38593
Description:	In the Linux kernel, the following vulnerability has been resolved: net: micrel: Fix receiving the timestamp in the frame for lan8841 The blamed commit started to use the ptp workqueue to get the second part of the timestamp. And when the port was set down, then this workqueue is stopped. But if the config option NETWORK_PHY_TIMESTAMPING is not enabled, then the ptp_clock is not initialized so then it would crash when it would try to access the delayed work. So then basically by setting up and then down the port, it would crash. The fix consists in checking if the ptp_clock is initialized and only then cancel the delayed work.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2024-38593 https://git.kernel.org/stable/c/3ddf170e4a604f5d4d9459a36993f5e92b53e8b0 https://git.kernel.org/stable/c/3ddf170e4a604f5d4d9459a36993f5e92b53e8b0 https://git.kernel.org/stable/c/3fd4282d5f25c3c97fef3ef0b89b82ef4e2bc975 https://git.kernel.org/stable/c/3fd4282d5f25c3c97fef3ef0b89b82ef4e2bc975 https://git.kernel.org/stable/c/64a47cf634ae44e92be24ebc982410841093bd7b https://git.kernel.org/stable/c/64a47cf634ae44e92be24ebc982410841093bd7b https://git.kernel.org/stable/c/aea27a92a41dae14843f92c79e9e42d8f570105c https://git.kernel.org/stable/c/aea27a92a41dae14843f92c79e9e42d8f570105c