From 735c308a6b183b7c2d00614e64aab69e37d5ac64 Mon Sep 17 00:00:00 2001 From: Sven Eckelmann Date: Tue, 29 Dec 2020 09:24:21 +0100 Subject: [PATCH] batman-adv: Avoid sizeof on flexible structure The batadv_dhcp_packet is used to read in parts of the DHCP packet and extract relevant information for the distributed arp table. But the structure contained the flexible member "options" which is no where used in the code. A sizeof on this kind of type would return the size of everything except the flexible member. But sparse will detect this kind of sizeof and warn with warning: using sizeof on a flexible structure This can be avoided by dropping the unused flexible member. Signed-off-by: Sven Eckelmann Signed-off-by: Simon Wunderlich --- net/batman-adv/distributed-arp-table.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/batman-adv/distributed-arp-table.c b/net/batman-adv/distributed-arp-table.c index 01e0f84cb1fff..2542d85a59b4a 100644 --- a/net/batman-adv/distributed-arp-table.c +++ b/net/batman-adv/distributed-arp-table.c @@ -87,7 +87,7 @@ struct batadv_dhcp_packet { __u8 sname[64]; __u8 file[128]; __be32 magic; - __u8 options[]; + /* __u8 options[]; */ }; #define BATADV_DHCP_YIADDR_LEN sizeof(((struct batadv_dhcp_packet *)0)->yiaddr) -- 2.39.5