Don't leave garbage in req.work before punting async on -EAGAIN
in io_iopoll_queue().
[ 140.922099] general protection fault, probably for non-canonical
address 0xdead000000000100: 0000 [#1] PREEMPT SMP PTI
...
[ 140.922105] RIP: 0010:io_worker_handle_work+0x1db/0x480
...
[ 140.922114] Call Trace:
[ 140.922118] ? __next_timer_interrupt+0xe0/0xe0
[ 140.922119] io_wqe_worker+0x2a9/0x360
[ 140.922121] ? _raw_spin_unlock_irqrestore+0x24/0x40
[ 140.922124] kthread+0x12c/0x170
[ 140.922125] ? io_worker_handle_work+0x480/0x480
[ 140.922126] ? kthread_park+0x90/0x90
[ 140.922127] ret_from_fork+0x22/0x30
Fixes: 7cdaf587de7c ("io_uring: avoid whole io_wq_work copy for requests
completed inline")
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
fs/io_uring.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 54addaba742d..410b2df16c71 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1105,6 +1105,7 @@ static inline void io_prep_async_work(struct io_kiocb *req,
req->work.flags |= IO_WQ_WORK_UNBOUND;
}
+ io_req_init_async(req);
io_req_work_grab_env(req, def);
*link = io_prep_linked_timeout(req);
--
2.24.0
