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[PATCH 5/7] grub-core/net/net.c: Fix uninitialized scalar variable


From: Alec Brown
Subject: [PATCH 5/7] grub-core/net/net.c: Fix uninitialized scalar variable
Date: Tue, 15 Mar 2022 16:24:07 -0400

In the function grub_net_ipv6_get_link_local(), grub_net_network_level_address_t
addr is called but isn't being initialized. To prevent contents of this
structure from being filled with junk data from the stack, we can initialize it
to 0 by setting addr to {};

Fixes: CID 375033

Signed-off-by: Alec Brown <alec.r.brown@oracle.com>
---
 grub-core/net/net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/grub-core/net/net.c b/grub-core/net/net.c
index 4d3eb5c1a..4e93365a7 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -287,7 +287,7 @@ grub_net_ipv6_get_link_local (struct grub_net_card *card,
   struct grub_net_network_level_interface *inf;
   char *name;
   char *ptr;
-  grub_net_network_level_address_t addr;
+  grub_net_network_level_address_t addr = {};
 
   addr.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV6;
   addr.ipv6[0] = grub_cpu_to_be64_compile_time (0xfe80ULL << 48);
-- 
2.27.0




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