linux-kernel - [PATCH 5.14 110/151] gve: Properly handle errors in gve_assign

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Message-Id: <20211011134521.374064291@linuxfoundation.org>
Date:   Mon, 11 Oct 2021 15:46:22 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Catherine Sullivan <csully@...gle.com>,
        Jeroen de Borst <jeroendb@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 110/151] gve: Properly handle errors in gve_assign_qpl

From: Catherine Sullivan <csully@...gle.com>

[ Upstream commit d4b111fda69a01e0a7439d05993f5dad567c93aa ]

Ignored errors would result in crash.

Fixes: ede3fcf5ec67f ("gve: Add support for raw addressing to the rx path")
Signed-off-by: Catherine Sullivan <csully@...gle.com>
Signed-off-by: Jeroen de Borst <jeroendb@...gle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/google/gve/gve_rx.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/google/gve/gve_rx.c b/drivers/net/ethernet/google/gve/gve_rx.c
index bb8261368250..94941d4e4744 100644
--- a/drivers/net/ethernet/google/gve/gve_rx.c
+++ b/drivers/net/ethernet/google/gve/gve_rx.c
@@ -104,8 +104,14 @@ static int gve_prefill_rx_pages(struct gve_rx_ring *rx)
 	if (!rx->data.page_info)
 		return -ENOMEM;
 
-	if (!rx->data.raw_addressing)
+	if (!rx->data.raw_addressing) {
 		rx->data.qpl = gve_assign_rx_qpl(priv);
+		if (!rx->data.qpl) {
+			kvfree(rx->data.page_info);
+			rx->data.page_info = NULL;
+			return -ENOMEM;
+		}
+	}
 	for (i = 0; i < slots; i++) {
 		if (!rx->data.raw_addressing) {
 			struct page *page = rx->data.qpl->pages[i];
-- 
2.33.0