CVE ID:	CVE-2021-47494
Description:	In the Linux kernel, the following vulnerability has been resolved: cfg80211: fix management registrations locking The management registrations locking was broken, the list was locked for each wdev, but cfg80211_mgmt_registrations_update() iterated it without holding all the correct spinlocks, causing list corruption. Rather than trying to fix it with fine-grained locking, just move the lock to the wiphy/rdev (still need the list on each wdev), we already need to hold the wdev lock to change it, so there's no contention on the lock in any case. This trivially fixes the bug since we hold one wdev's lock already, and now will hold the lock that protects all lists.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2021-47494 https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97 https://git.kernel.org/stable/c/09b1d5dc6ce1c9151777f6c4e128a59457704c97 https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e https://git.kernel.org/stable/c/3c897f39b71fe68f90599f6a45b5f7bf5618420e https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4 https://git.kernel.org/stable/c/4c22227e39c7a0b4dab55617ee8d34d171fab8d4