wallet/txfilter: free outpoint filter and scriptpubkeyset on exit.

Direct leak of 32 byte(s) in 1 object(s) allocated from:
    #0 0x7f7678ee863e in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10c63e)
    #1 0x55f8c7b0fce5 in htable_default_alloc ccan/ccan/htable/htable.c:19
    #2 0x55f8c7b1064f in double_table ccan/ccan/htable/htable.c:226
    #3 0x55f8c7b10b19 in htable_add_ ccan/ccan/htable/htable.c:331
    #4 0x55f8c7afac63 in scriptpubkeyset_add wallet/txfilter.c:30
    #5 0x55f8c7afafce in txfilter_add_scriptpubkey wallet/txfilter.c:77
    #6 0x55f8c7afb05f in txfilter_add_derkey wallet/txfilter.c:91
    #7 0x55f8c7aa4d67 in init_txfilter lightningd/lightningd.c:482
    #8 0x55f8c7aa52d8 in main lightningd/lightningd.c:721
    #9 0x7f767889ab6a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26b6a)

Direct leak of 16 byte(s) in 1 object(s) allocated from:
    #0 0x7f05f389563e in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10c63e)
    #1 0x55cac1e6bc99 in htable_default_alloc ccan/ccan/htable/htable.c:19
    #2 0x55cac1e6c603 in double_table ccan/ccan/htable/htable.c:226
    #3 0x55cac1e6cacd in htable_add_ ccan/ccan/htable/htable.c:331
    #4 0x55cac1e56e48 in outpointset_add wallet/txfilter.c:61
    #5 0x55cac1e57162 in outpointfilter_add wallet/txfilter.c:116
    #6 0x55cac1e5ea3a in wallet_utxoset_add wallet/wallet.c:2365
    #7 0x55cac1deddc2 in topo_add_utxos lightningd/chaintopology.c:603
    #8 0x55cac1dedeac in add_tip lightningd/chaintopology.c:620
    #9 0x55cac1dee2de in have_new_block lightningd/chaintopology.c:694
    #10 0x55cac1deaab0 in process_rawblock lightningd/bitcoind.c:466
    #11 0x55cac1de9fb4 in bcli_finished lightningd/bitcoind.c:214
    #12 0x55cac1e6f5be in destroy_conn ccan/ccan/io/poll.c:244
    #13 0x55cac1e6f5de in destroy_conn_close_fd ccan/ccan/io/poll.c:250
    #14 0x55cac1e7baf5 in notify ccan/ccan/tal/tal.c:235
    ElementsProject#15 0x55cac1e7bfe4 in del_tree ccan/ccan/tal/tal.c:397
    ElementsProject#16 0x55cac1e7c370 in tal_free ccan/ccan/tal/tal.c:481
    ElementsProject#17 0x55cac1e6dddd in io_close ccan/ccan/io/io.c:450
    ElementsProject#18 0x55cac1e6fcf9 in io_loop ccan/ccan/io/poll.c:449
    ElementsProject#19 0x55cac1dfac66 in io_loop_with_timers lightningd/io_loop_with_timers.c:24
    ElementsProject#20 0x55cac1e0156b in main lightningd/lightningd.c:822
    ElementsProject#21 0x7f05f3247b6a in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x26b6a)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

wallet/txfilter.c

@@ -65,10 +65,16 @@ struct outpointfilter {
 	struct outpointset *set;
 };
 
+static void destroy_txfilter(struct txfilter *filter)
+{
+	scriptpubkeyset_clear(&filter->scriptpubkeyset);
+}
+
 struct txfilter *txfilter_new(const tal_t *ctx)
 {
 	struct txfilter *filter = tal(ctx, struct txfilter);
 	scriptpubkeyset_init(&filter->scriptpubkeyset);
+	tal_add_destructor(filter, destroy_txfilter);
 	return filter;
 }
 
@@ -132,10 +138,16 @@ void outpointfilter_remove(struct outpointfilter *of, const struct bitcoin_txid
 	outpointset_del(of->set, &op);
 }
 
+static void destroy_outpointfilter(struct outpointfilter *opf)
+{
+	outpointset_clear(opf->set);
+}
+
 struct outpointfilter *outpointfilter_new(tal_t *ctx)
 {
 	struct outpointfilter *opf = tal(ctx, struct outpointfilter);
 	opf->set = tal(opf, struct outpointset);
 	outpointset_init(opf->set);
+	tal_add_destructor(opf, destroy_outpointfilter);
 	return opf;
 }