Description: fanotify: Fix stale file descriptor in copy_event_to_user()
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2052312
Notes:
 carnil> CAP_SYS_ADMIN capability is required to exploit the issue.
 carnil> Issue introduced with f644bc449b37 ("fanotify: fix
 carnil> copy_event_to_user() fid error clean up") in 5.13-rc7 and was
 carnil> backported to 5.10.46 and 5.12.13.
Bugs:
upstream: released (5.17-rc3) [ee12595147ac1fbfb5bcb23837e26dd58d94b15d]
5.10-upstream-stable: released (5.10.97) [7b4741644cf718c422187e74fb07661ef1d68e85]
4.19-upstream-stable: N/A "Vulnerable code not present"
4.9-upstream-stable: N/A "Vulnerable code not present"
sid: released (5.16.7-1)
5.10-bullseye-security: released (5.10.103-1)
4.19-buster-security: N/A "Vulnerable code not present"
4.9-stretch-security: N/A "Vulnerable code not present"