linux/io_uring
Pavel Begunkov bcedd497b3 io_uring/af_unix: disable sending io_uring over sockets
commit 705318a99a upstream.

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@vger.kernel.org>
Fixes: 0091bfc817 ("io_uring/af_unix: defer registered files gc to io_uring release")
Reported-and-suggested-by: Jann Horn <jannh@google.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/c716c88321939156909cfa1bd8b0faaf1c804103.1701868795.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-12-13 18:36:46 +01:00
..
io_uring.c io_uring/af_unix: disable sending io_uring over sockets 2023-12-13 18:36:46 +01:00
io-wq.c io_uring: break out of iowq iopoll on teardown 2023-09-19 12:22:54 +02:00
io-wq.h io_uring: break out of iowq iopoll on teardown 2023-09-19 12:22:54 +02:00
Makefile io_uring: move to separate directory 2022-12-14 11:37:31 +01:00