debug lk

hc

2024-02-20 e636c8d336489bf3eed5878299e6cc045bbad077

 kernel/net/tipc/group.c
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@@ -542,7 +542,7 @@
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 				update = true;
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 				deliver = false;
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 			}
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-			/* Fall thru */
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+			fallthrough;
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 		case TIPC_GRP_BCAST_MSG:
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 			m->bc_rcv_nxt++;
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 			ack = msg_grp_bc_ack_req(hdr);
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@@ -924,7 +924,10 @@
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 int tipc_group_fill_sock_diag(struct tipc_group *grp, struct sk_buff *skb)
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 {
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-	struct nlattr *group = nla_nest_start(skb, TIPC_NLA_SOCK_GROUP);
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+	struct nlattr *group = nla_nest_start_noflag(skb, TIPC_NLA_SOCK_GROUP);
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+
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+	if (!group)
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+		return -EMSGSIZE;
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 	if (nla_put_u32(skb, TIPC_NLA_SOCK_GROUP_ID,
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 			grp->type) ||