Jens Axboe 6e85c91e7d io_uring/net: fix multishot accept overflow handling ... commit a37ee9e117 upstream. If we hit CQ ring overflow when attempting to post a multishot accept completion, we don't properly save the result or return code. This results in losing the accepted fd value. Instead, we return the result from the poll operation that triggered the accept retry. This is generally POLLIN|POLLPRI|POLLRDNORM|POLLRDBAND which is 0xc3, or 195, which looks like a valid file descriptor, but it really has no connection to that. Handle this like we do for other multishot completions - assign the result, and return IOU_STOP_MULTISHOT to cancel any further completions from this request when overflow is hit. This preserves the result, as we should, and tells the application that the request needs to be re-armed. Cc: stable@vger.kernel.org Fixes: 515e269612 ("io_uring: revert "io_uring fix multishot accept ordering"") Link: https://github.com/axboe/liburing/issues/1062 Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-02-23 09:51:50 +01:00
..
advise.c	io_uring: always go async for unsupported fadvise flags	2023-01-29 15:18:26 -07:00
advise.h
alloc_cache.h	io_uring/rsrc: consolidate node caching	2023-04-12 12:09:41 -06:00
cancel.c	io_uring: use fget/fput consistently	2023-11-28 11:56:29 -07:00
cancel.h	io_uring: add support for futex wake and wait	2023-09-29 02:36:57 -06:00
epoll.c	io_uring: undeprecate epoll_ctl support	2023-05-26 20:22:41 -06:00
epoll.h
fdinfo.c	io_uring/fdinfo: remove need for sqpoll lock for thread/pid retrieval	2023-11-15 06:35:46 -07:00
fdinfo.h
filetable.c	io_uring: add helpers to decode the fixed file file_ptr	2023-06-20 09:36:22 -06:00
filetable.h	io_uring: add helpers to decode the fixed file file_ptr	2023-06-20 09:36:22 -06:00
fs.c	io_uring/fs: consider link->flags when getting path for LINKAT	2023-11-20 09:01:42 -07:00
fs.h
futex.c	io_uring: add support for vectored futex waits	2023-09-29 02:37:08 -06:00
futex.h	io_uring: add support for vectored futex waits	2023-09-29 02:37:08 -06:00
io_uring.c	io_uring: adjust defer tw counting	2024-01-25 15:45:30 -08:00
io_uring.h	io_uring/poll: add requeue return code from poll multishot handling	2024-02-16 19:14:31 +01:00
io-wq.c	io-wq: fully initialize wqe before calling cpuhp_state_add_instance_nocalls()	2023-10-05 14:11:18 -06:00
io-wq.h	io_uring: break out of iowq iopoll on teardown	2023-09-07 09:02:27 -06:00
kbuf.c	io_uring/kbuf: check for buffer list readiness after NULL check	2023-12-05 07:02:13 -07:00
kbuf.h	io_uring: free io_buffer_list entries via RCU	2023-11-28 11:45:02 -07:00
Makefile	io_uring: add support for futex wake and wait	2023-09-29 02:36:57 -06:00
msg_ring.c	io_uring: use io_file_from_index in io_msg_grab_file	2023-06-20 09:36:22 -06:00
msg_ring.h	io_uring: get rid of double locking	2022-12-07 06:47:13 -07:00
net.c	io_uring/net: fix multishot accept overflow handling	2024-02-23 09:51:50 +01:00
net.h	io_uring: Add KASAN support for alloc_caches	2023-04-03 07:16:14 -06:00
nop.c
nop.h
notif.c	io_uring/notif: add constant for ubuf_info flags	2023-04-15 14:21:04 -06:00
notif.h	io_uring/notif: add constant for ubuf_info flags	2023-04-15 14:21:04 -06:00
opdef.c	io_uring/rw: add separate prep handler for fixed read/write	2023-11-06 07:43:16 -07:00
opdef.h	io_uring/rw: mark readv/writev as vectored in the opcode definition	2023-09-21 12:00:46 -06:00
openclose.c	io_uring: use files_lookup_fd_locked()	2023-10-19 11:02:49 +02:00
openclose.h
poll.c	io_uring/poll: add requeue return code from poll multishot handling	2024-02-16 19:14:31 +01:00
poll.h	io_uring/rw: ensure poll based multishot read retries appropriately	2024-02-16 19:14:30 +01:00
refs.h
rsrc.c	io_uring: fix off-by one bvec index	2023-11-20 15:21:38 -07:00
rsrc.h	io_uring/af_unix: disable sending io_uring over sockets	2023-12-07 10:35:19 -07:00
rw.c	io_uring/rw: ensure poll based multishot read retries appropriately	2024-02-16 19:14:30 +01:00
rw.h	io_uring/rw: add separate prep handler for fixed read/write	2023-11-06 07:43:16 -07:00
slist.h	io_uring: silence variable ‘prev’ set but not used warning	2023-03-09 10:10:58 -07:00
splice.c	io_uring/splice: use fput() directly	2023-08-10 10:24:25 -06:00
splice.h
sqpoll.c	io_uring/fdinfo: remove need for sqpoll lock for thread/pid retrieval	2023-11-15 06:35:46 -07:00
sqpoll.h	io_uring/sqpoll: fix io-wq affinity when IORING_SETUP_SQPOLL is used	2023-08-16 13:40:28 -06:00
statx.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
statx.h
sync.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
sync.h
tctx.c	io_uring: Add io_uring_setup flag to pre-register ring fd and never install it	2023-05-16 08:06:00 -06:00
tctx.h	io_uring: simplify __io_uring_add_tctx_node	2022-10-07 12:25:30 -06:00
timeout.c	io_uring: never overflow io_aux_cqe	2023-08-11 10:42:57 -06:00
timeout.h	io_uring: remove unused return from io_disarm_next	2022-09-21 13:15:01 -06:00
uring_cmd.c	io_uring/cmd: fix breakage in SOCKET_URING_OP_SIOC* implementation	2023-12-14 16:52:13 -07:00
uring_cmd.h	io_uring: Remove unnecessary BUILD_BUG_ON	2023-05-04 08:19:05 -06:00
waitid.c	io_uring: add IORING_OP_WAITID support	2023-09-21 12:04:45 -06:00
waitid.h	io_uring: add IORING_OP_WAITID support	2023-09-21 12:04:45 -06:00
xattr.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
xattr.h