Description: io_uring: check that we have a file table when allocating update slots
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=2134370
 https://lore.kernel.org/all/d5a19c1e-9968-e22e-5917-c3139c5e7e89@kernel.dk/
Notes:
 carnil> Commit fixes a7c41b4687f5 ("io_uring: let
 carnil> IORING_OP_FILES_UPDATE support choosing fixed file slots") in
 carnil> 5.19-rc1.
Bugs:
upstream: released (5.19-rc6) [d785a773bed966a75ca1f11d108ae1897189975b]
5.10-upstream-stable: N/A "Vulnerable code not present"
4.19-upstream-stable: N/A "Vulnerable code not present"
sid: N/A "Vulnerable code not present"
5.10-bullseye-security: N/A "Vulnerable code not present"
4.19-buster-security: N/A "Vulnerable code not present"