The SQ index array consists of user provided indexes, which io_uring then uses to index the SQ, and so it's susceptible to speculation. For all other queues io_uring tracks heads and tails in kernel, and they shouldn't need any special care. Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx> --- io_uring/io_uring.c | 1 + 1 file changed, 1 insertion(+) diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index f34fa1ead2cf..406825d000eb 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2544,6 +2544,7 @@ static bool io_get_sqe(struct io_ring_ctx *ctx, const struct io_uring_sqe **sqe) READ_ONCE(ctx->rings->sq_dropped) + 1); return false; } + head = array_index_nospec(head, ctx->sq_entries); } /* -- 2.46.0
