1-2 put some limits on the fixed file tables sizes, files and buffers. 3/3 adds compatibility checks for ->splice_fd_in, for all requests buy rw and some others, see the patch message. All based on 5.15 and merked stable, looks to me as the best way. Pavel Begunkov (3): io_uring: limit fixed table size by RLIMIT_NOFILE io_uring: place fixed tables under memcg limits io_uring: add ->splice_fd_in checks fs/io_uring.c | 61 ++++++++++++++++++++++++++++++--------------------- 1 file changed, 36 insertions(+), 25 deletions(-) -- 2.32.0