Description: USB: core: Fix races in character device registration and deregistraion
References:
 http://www.openwall.com/lists/oss-security/2019/12/03/4
Notes:
Bugs:
upstream: released (5.3-rc5) [303911cfc5b95d33687d9046133ff184cf5043ff]
4.19-upstream-stable: released (4.19.68) [7f52d6d2a82df15d7ea01d69d0943d2abc201b43]
4.9-upstream-stable: released (4.9.190) [741b832658b98463d619fe4c320f8ab11b2ad4ee]
3.16-upstream-stable: released (3.16.78) [7e0af4e53ee2cf9b5e4ee761bd8dc4f25a9c885a]
sid: released (5.2.17-1)
4.19-buster-security: released (4.19.87-1)
4.9-stretch-security: released (4.9.210-1)
3.16-jessie-security: released (3.16.81-1)