Commit 2408d178 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring/query: prevent infinite loops 



If the query chain forms a cycle, the interface will loop indefinitely.
Make sure it handles fatal signals, so the user can kill the process and
hence break out of the infinite loop.

Fixes: c265ae75 ("io_uring: introduce io_uring querying")
Reported-by: default avatarJens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 31bf77dc

io_uring/query.c

+4 −0
Original line number Diff line number Diff line
@@ -88,6 +88,10 @@ int io_query(struct io_ring_ctx *ctx, void __user *arg, unsigned nr_args) 
		if (ret)

			return ret;

		uhdr = u64_to_user_ptr(next_hdr);



		if (fatal_signal_pending(current))

			return -EINTR;

		cond_resched();

	}

	return 0;

}