From: Ameer Hamza <amhamza.mgc@gmail.com>
Date: Sun, 5 Dec 2021 23:38:10 +0500
Subject: gve: fix for null pointer dereference.
Patch-mainline: v5.16-rc5
Git-commit: e6f60c51f0435862020bcd2d1e3257caaafe5650
References: bsc#1191655

Avoid passing NULL skb to __skb_put() function call if
napi_alloc_skb() returns NULL.

Fixes: 37149e9374bf ("gve: Implement packet continuation for RX.")
Signed-off-by: Ameer Hamza <amhamza.mgc@gmail.com>
Link: https://lore.kernel.org/r/20211205183810.8299-1-amhamza.mgc@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/google/gve/gve_utils.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/ethernet/google/gve/gve_utils.c
+++ b/drivers/net/ethernet/google/gve/gve_utils.c
@@ -68,6 +68,9 @@ struct sk_buff *gve_rx_copy(struct net_d
 		set_protocol = ctx->curr_frag_cnt == ctx->expected_frag_cnt - 1;
 	} else {
 		skb = napi_alloc_skb(napi, len);
+
+		if (unlikely(!skb))
+			return NULL;
 		set_protocol = true;
 	}
 	__skb_put(skb, len);