UPSTREAM: io_uring: don't touch scm_fp_list after queueing skb

[ Upstream commit a07211e3 ]

It's safer to not touch scm_fp_list after we queued an skb to which it
was assigned, there might be races lurking if we screw subtle sync
guarantees on the io_uring side.

Fixes: 6b06314c ("io_uring: add file set registration")
Change-Id: Ib3c5ae1bfb6a2aaa00ec9503c7f6ab67058d115f
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit aed30a20)
Bug: 268174392
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>