On Wed, 6 Dec 2023 13:55:19 +0000 Pavel Begunkov wrote:
> File reference cycles have caused lots of problems for io_uring
> in the past, and it still doesn't work exactly right and races with
> unix_stream_read_generic(). The safest fix would be to completely
> disallow sending io_uring files via sockets via SCM_RIGHT, so there
> are no possible cycles invloving registered files and thus rendering
> SCM accounting on the io_uring side unnecessary.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 0091bfc81741b ("io_uring/af_unix: defer registered files gc to io_uring release")
> Reported-and-suggested-by: Jann Horn <jannh@xxxxxxxxxx>
> Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>
FWIW
