5.13 stable backports

Attachments:

• 0002-io_uring-add-splice_fd_in-checks.patch (text/x-patch — 8.7 KB)
• 0001-io_uring-place-fixed-tables-under-memcg-limits.patch (text/x-patch — 11.8 KB)
• 0005-io-wq-fix-race-between-adding-work-and-activating-a-.patch (text/x-patch — 3.7 KB)
• 0004-io-wq-fix-wakeup-race-when-adding-new-work.patch (text/x-patch — 1.9 KB)
• 0003-io_uring-fix-io_try_cancel_userdata-race-for-iowq.patch (text/x-patch — 2.5 KB)
• 0006-io_uring-fail-links-of-cancelled-timeouts.patch (text/x-patch — 1.2 KB)