Hagar Hemdan b571a36750 io_uring: fix possible deadlock in io_register_iowq_max_workers() ... [ Upstream commit 73254a297c ] The io_register_iowq_max_workers() function calls io_put_sq_data(), which acquires the sqd->lock without releasing the uring_lock. Similar to the commit 009ad9f0c6 ("io_uring: drop ctx->uring_lock before acquiring sqd->lock"), this can lead to a potential deadlock situation. To resolve this issue, the uring_lock is released before calling io_put_sq_data(), and then it is re-acquired after the function call. This change ensures that the locks are acquired in the correct order, preventing the possibility of a deadlock. Suggested-by: Maximilian Heyne <mheyne@amazon.de> Signed-off-by: Hagar Hemdan <hagarhem@amazon.com> Link: https://lore.kernel.org/r/20240604130527.3597-1-hagarhem@amazon.com Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-07-25 09:53:23 +02:00
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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: use mempool KASAN hook	2023-12-29 11:58:41 -08:00
cancel.c	io_uring/cancel: don't default to setting req->work.cancel_seq	2024-02-08 13:27:06 -07:00
cancel.h	io_uring: fix cancellation overwriting req->flags	2024-06-21 14:40:11 +02:00
epoll.c	io_uring: undeprecate epoll_ctl support	2023-05-26 20:22:41 -06:00
epoll.h
fdinfo.c	io_uring: Fix sqpoll utilization check racing with dying sqpoll	2024-03-09 07:27:09 -07:00
fdinfo.h
filetable.c	io_uring: drop any code related to SCM_RIGHTS	2023-12-19 12:36:34 -07:00
filetable.h	io_uring: expand main struct io_kiocb flags to 64-bits	2024-02-08 13:27:03 -07:00
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/futex: always remove futex entry for cancel all	2024-03-15 15:37:15 -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: signal SQPOLL task_work with TWA_SIGNAL_NO_IPI	2024-07-05 09:38:15 +02:00
io_uring.h	io_uring: check for non-NULL file pointer in io_file_can_poll()	2024-06-16 13:51:04 +02:00
io-wq.c	io_uring/io-wq: avoid garbage value of 'match' in io_wq_enqueue()	2024-06-21 14:40:19 +02:00
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: hold io_buffer_list reference over mmap	2024-04-02 19:03:27 -06:00
kbuf.h	io_uring/kbuf: hold io_buffer_list reference over mmap	2024-04-02 19:03:27 -06:00
Makefile	io-uring: add napi busy poll support	2024-02-09 11:54:19 -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
napi.c	io_uring/napi: fix timeout calculation	2024-06-16 13:51:04 +02:00
napi.h	io_uring: add register/unregister napi function	2024-02-09 11:54:32 -07:00
net.c	io_uring/net: fix sendzc lazy wake polling	2024-05-30 09:44:09 +02:00
net.h	io_uring: Add KASAN support for alloc_caches	2023-04-03 07:16:14 -06:00
nop.c	io_uring: fail NOP if non-zero op flags is passed in	2024-05-30 09:43:59 +02:00
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: add support for ftruncate	2024-02-09 09:04:39 -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: fix poll_remove stalled req completion	2024-03-15 09:36:56 -06:00
poll.h	io_uring/rw: ensure poll based multishot read retries appropriately	2024-01-28 20:37:11 -07:00
refs.h
register.c	io_uring: fix possible deadlock in io_register_iowq_max_workers()	2024-07-25 09:53:23 +02:00
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/rsrc: fix incorrect assignment of iter->nr_segs in io_import_fixed	2024-06-27 13:52:25 +02:00
rsrc.h	io_uring: Don't include af_unix.h.	2024-02-12 19:02:11 -07:00
rw.c	io_uring/rw: don't allow multishot reads without NOWAIT support	2024-04-01 11:41:50 -06:00
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
sqpoll.c	io_uring/sqpoll: work around a potential audit memory leak	2024-06-27 13:52:11 +02:00
sqpoll.h	io_uring/sqpoll: statistics of the true utilization of sq threads	2024-03-01 06:28:19 -07:00
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
truncate.c	io_uring: add support for ftruncate	2024-02-09 09:04:39 -07:00
truncate.h	io_uring: add support for ftruncate	2024-02-09 09:04:39 -07:00
uring_cmd.c	io_uring: Don't include af_unix.h.	2024-02-12 19:02:11 -07:00
uring_cmd.h	io_uring: Remove unnecessary BUILD_BUG_ON	2023-05-04 08:19:05 -06:00
waitid.c	io_uring/waitid: always remove waitid entry for cancel all	2024-03-15 15:42:49 -06:00
waitid.h	io_uring: add IORING_OP_WAITID support	2023-09-21 12:04:45 -06:00
xattr.c	io_uring: use file_mnt_idmap helper	2024-02-06 19:55:14 -07:00
xattr.h