UPSTREAM: netfilter: nf_tables: skip bound chain on rule flush

[ Upstream commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8 ] Skip bound chain when flushing table rules, the rule that owns this chain releases these objects. Otherwise, the following warning is triggered: WARNING: CPU: 2 PID: 1217 at net/netfilter/nf_tables_api.c:2013 nf_tables_chain_destroy+0x1f7/0x210 [nf_tables] CPU: 2 PID: 1217 Comm: chain-flush Not tainted 6.1.39 projectceladon#1 RIP: 0010:nf_tables_chain_destroy+0x1f7/0x210 [nf_tables] Bug: 294357305 Fixes: d0e2c7d ("netfilter: nf_tables: add NFT_CHAIN_BINDING") Reported-by: Kevin Rich <[email protected]> Signed-off-by: Pablo Neira Ayuso <[email protected]> Signed-off-by: Florian Westphal <[email protected]> Signed-off-by: Sasha Levin <[email protected]> (cherry picked from commit e18922ce3e3169eb97838d1dcba2d679bcca446c) Signed-off-by: Lee Jones <[email protected]> Change-Id: I48f43d0ce3410efec2513479a1f4c7708a097b01
xyzhao2018 · Aug 16, 2023 · eec4968 · eec4968
1 parent dc2a55f
commit eec4968
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
@@ -3744,6 +3744,8 @@ static int nf_tables_delrule(struct sk_buff *skb, const struct nfnl_info *info,
 		list_for_each_entry(chain, &table->chains, list) {
 			if (!nft_is_active_next(net, chain))
 				continue;
+			if (nft_chain_is_bound(chain))
+				continue;
 
 			ctx.chain = chain;
 			err = nft_delrule_by_chain(&ctx);