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| author | Keith Busch <kbusch@kernel.org> | 2025-06-11 13:53:43 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-19 15:32:33 +0200 |
| commit | 48f33ec1410756957889a3642199aee065d1167f (patch) | |
| tree | 390030010b524bab883664479439e457884f1b6d /drivers/usb/cdns3/cdns3-pci-wrap.c | |
| parent | 0fccb6773b1f4f992e435582cf8e050de421b678 (diff) | |
io_uring: consistently use rcu semantics with sqpoll thread
[ Upstream commit c538f400fae22725580842deb2bef546701b64bd ]
The sqpoll thread is dereferenced with rcu read protection in one place,
so it needs to be annotated as an __rcu type, and should consistently
use rcu helpers for access and assignment to make sparse happy.
Since most of the accesses occur under the sqd->lock, we can use
rcu_dereference_protected() without declaring an rcu read section.
Provide a simple helper to get the thread from a locked context.
Fixes: ac0b8b327a5677d ("io_uring: fix use-after-free of sq->thread in __io_uring_show_fdinfo()")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20250611205343.1821117-1-kbusch@meta.com
[axboe: fold in fix for register.c]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/usb/cdns3/cdns3-pci-wrap.c')
0 files changed, 0 insertions, 0 deletions