From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Fri, 27 Mar 2020 17:43:04 +0100
Subject: netfilter: nft_set_bitmap: initialize set element extension in
 lookups
Patch-mainline: v5.7-rc1
Git-commit: 24791b9aa1ab09818617ff384876930e09ada0a3
References: bsc#1176447

Otherwise, nft_lookup might dereference an uninitialized pointer to the
element extension.

Fixes: 665153ff5752 ("netfilter: nf_tables: add bitmap set type")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 net/netfilter/nft_set_bitmap.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/netfilter/nft_set_bitmap.c
+++ b/net/netfilter/nft_set_bitmap.c
@@ -81,6 +81,7 @@ static bool nft_bitmap_lookup(const stru
 	u32 idx, off;
 
 	nft_bitmap_location(set, key, &idx, &off);
+	*ext = NULL;
 
 	return nft_bitmap_active(priv->bitmap, idx, off, genmask);
 }