Jens Axboe a37ee9e117 io_uring/net: fix multishot accept overflow handling ... 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>		2024-02-14 18:30:19 -07:00
..
advise.c	io_uring: always go async for unsupported fadvise flags	2023-01-29 15:18:26 -07:00
advise.h	io_uring: split out fadvise/madvise operations	2022-07-24 18:39:11 -06:00
alloc_cache.h	io_uring: use mempool KASAN hook	2023-12-29 11:58:41 -08:00
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	io_uring: move epoll handler to its own file	2022-07-24 18:39:11 -06:00
fdinfo.c	io_uring/fdinfo: remove need for sqpoll lock for thread/pid retrieval	2023-11-15 06:35:46 -07:00
fdinfo.h	io_uring: move fdinfo helpers to its own file	2022-07-24 18:39:12 -06:00
filetable.c	io_uring: drop any code related to SCM_RIGHTS	2023-12-19 12:36:34 -07:00
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	io_uring: split out filesystem related operations	2022-07-24 18:39:11 -06:00
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	for-6.8/io_uring-2024-01-18	2024-01-18 18:17:57 -08:00
io_uring.h	io_uring/poll: add requeue return code from poll multishot handling	2024-01-29 13:19:47 -07:00
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: add method for returning provided buffer ring head	2023-12-21 09:47:06 -07:00
kbuf.h	io_uring/kbuf: add method for returning provided buffer ring head	2023-12-21 09:47:06 -07:00
Makefile	io_uring/register: move io_uring_register(2) related code to register.c	2023-12-19 08:54:20 -07:00
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	2024-02-14 18:30:19 -07:00
net.h	io_uring: Add KASAN support for alloc_caches	2023-04-03 07:16:14 -06:00
nop.c	io_uring: kill extra io_uring_types.h includes	2022-07-24 18:39:14 -06:00
nop.h	io_uring: move nop into its own file	2022-07-24 18:39:11 -06:00
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: enable audit and restrict cred override for IORING_OP_FIXED_FD_INSTALL	2024-01-23 15:25:14 -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: enable audit and restrict cred override for IORING_OP_FIXED_FD_INSTALL	2024-01-23 15:25:14 -07:00
openclose.h	io_uring/openclose: add support for IORING_OP_FIXED_FD_INSTALL	2023-12-12 07:42:57 -07:00
poll.c	io_uring/poll: add requeue return code from poll multishot handling	2024-01-29 13:19:47 -07:00
poll.h	io_uring/rw: ensure poll based multishot read retries appropriately	2024-01-28 20:37:11 -07:00
refs.h	io_uring: make io_uring_types.h public	2022-07-24 18:39:14 -06:00
register.c	io_uring/register: guard compat syscall with CONFIG_COMPAT	2024-01-17 09:45:18 -07:00
register.h	io_uring/register: move io_uring_register(2) related code to register.c	2023-12-19 08:54:20 -07:00
rsrc.c	io_uring: drop any code related to SCM_RIGHTS	2023-12-19 12:36:34 -07:00
rsrc.h	io_uring/rsrc: improve code generation for fixed file assignment	2024-01-11 13:37:31 -07:00
rw.c	io_uring/rw: ensure poll based multishot read retries appropriately	2024-01-28 20:37:11 -07:00
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	splice: return type ssize_t from all helpers	2023-12-12 16:19:59 +01:00
splice.h	io_uring: split out splice related operations	2022-07-24 18:39:11 -06:00
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	io_uring: move statx handling to its own file	2022-07-24 18:39:11 -06:00
sync.c	io_uring: for requests that require async, force it	2023-01-29 15:18:26 -07:00
sync.h	io_uring: split out fs related sync/fallocate functions	2022-07-24 18:39:11 -06:00
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	for-6.8/io_uring-2024-01-08	2024-01-11 14:19:23 -08:00
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	io_uring: move xattr related opcodes to its own file	2022-07-24 18:39:11 -06:00