From 160f3549a907a50e51a8518678ba2dcf2541abea Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Mon, 5 Sep 2022 13:54:17 +0300 Subject: [PATCH] nvme-tcp: fix UAF when detecting digest errors We should also bail from the io_work loop when we set rd_enabled to true, so we don't attempt to read data from the socket when the TCP stream is already out-of-sync or corrupted. Fixes: 3f2304f8c6d6 ("nvme-tcp: add NVMe over TCP host driver") Reported-by: Daniel Wagner Signed-off-by: Sagi Grimberg Reviewed-by: Daniel Wagner Signed-off-by: Christoph Hellwig --- drivers/nvme/host/tcp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index 044da18..54b4e8a 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1229,7 +1229,7 @@ static void nvme_tcp_io_work(struct work_struct *w) else if (unlikely(result < 0)) return; - if (!pending) + if (!pending || !queue->rd_enabled) return; } while (!time_after(jiffies, deadline)); /* quota is exhausted */ -- 2.7.4