net/smc: fix a memory leak in smc_sysctl_net_exit()

Recently added smc_sysctl_net_exit() forgot to free the memory allocated from smc_sysctl_net_init() for non initial network namespace. Fixes: 462791b ("net/smc: add sysctl interface for SMC") Signed-off-by: Eric Dumazet <[email protected]> Reported-by: syzbot <[email protected]> Cc: Tony Lu <[email protected]> Cc: Dust Li <[email protected]> Signed-off-by: David S. Miller <[email protected]>
ambv · Mar 26, 2022 · 5ae6acf · 5ae6acf
1 parent 5c7e49b
commit 5ae6acf
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c
@@ -61,5 +61,10 @@ int __net_init smc_sysctl_net_init(struct net *net)
 
 void __net_exit smc_sysctl_net_exit(struct net *net)
 {
+	struct ctl_table *table;
+
+	table = net->smc.smc_hdr->ctl_table_arg;
 	unregister_net_sysctl_table(net->smc.smc_hdr);
+	if (!net_eq(net, &init_net))
+		kfree(table);
 }