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io_uring-5.8-2020-07-30 

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Merge tag 'io_uring-5.8-2020-07-30' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "Two small fixes for corner/error cases"

* tag 'io_uring-5.8-2020-07-30' of git://git.kernel.dk/linux-block:
  io_uring: fix lockup in io_fail_links()
  io_uring: fix ->work corruption with poll_add
This commit is contained in:
Linus Torvalds 2020-07-30 09:47:07 -07:00
parent 1c9df907da 4ae6dbd683
commit 0513b9d75c
1 changed files with 5 additions and 2 deletions
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7
fs/io_uring.c
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@ -4199,10 +4199,9 @@ static void io_poll_task_handler(struct io_kiocb *req, struct io_kiocb **nxt)
hash_del(&req->hash_node);
io_poll_complete(req, req->result, 0);
req->flags |= REQ_F_COMP_LOCKED;
io_put_req_find_next(req, nxt);
spin_unlock_irq(&ctx->completion_lock);
io_put_req_find_next(req, nxt);
io_cqring_ev_posted(ctx);
}
@ -4658,6 +4657,10 @@ static int io_poll_add(struct io_kiocb *req)
struct io_poll_table ipt;
__poll_t mask;
/* ->work is in union with hash_node and others */
io_req_work_drop_env(req);
req->flags &= ~REQ_F_WORK_INITIALIZED;
INIT_HLIST_NODE(&req->hash_node);
INIT_LIST_HEAD(&req->list);
ipt.pt._qproc = io_poll_queue_proc;