From 54a5f9d9abab639039eb7288bdc26c9c67f4e79b Mon Sep 17 00:00:00 2001 From: Liping Zhang Date: Sat, 15 Apr 2017 23:37:36 +0800 Subject: [PATCH] netfilter: nft_set_bitmap: free dummy elements when destroy the set We forget to free dummy elements when deleting the set. So when I was running nft-test.py, I saw many kmemleak warnings: kmemleak: 1344 new suspected memory leaks ... # cat /sys/kernel/debug/kmemleak unreferenced object 0xffff8800631345c8 (size 32): comm "nft", pid 9075, jiffies 4295743309 (age 1354.815s) hex dump (first 32 bytes): f8 63 13 63 00 88 ff ff 88 79 13 63 00 88 ff ff .c.c.....y.c.... 04 0c 00 00 00 00 00 00 00 00 00 00 08 03 00 00 ................ backtrace: [] kmemleak_alloc+0x4a/0xa0 [] __kmalloc+0x164/0x310 [] nft_set_elem_init+0x3d/0x1b0 [nf_tables] [] nft_add_set_elem+0x45a/0x8c0 [nf_tables] [] nf_tables_newsetelem+0x105/0x1d0 [nf_tables] [] nfnetlink_rcv+0x414/0x770 [nfnetlink] [] netlink_unicast+0x1f6/0x310 [] netlink_sendmsg+0x306/0x3b0 ... Fixes: e920dde516088 ("netfilter: nft_set_bitmap: keep a list of dummy elements") Signed-off-by: Liping Zhang Signed-off-by: Pablo Neira Ayuso --- net/netfilter/nft_set_bitmap.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/netfilter/nft_set_bitmap.c b/net/netfilter/nft_set_bitmap.c index 8ebbc2940f4c..b988162b5b15 100644 --- a/net/netfilter/nft_set_bitmap.c +++ b/net/netfilter/nft_set_bitmap.c @@ -257,6 +257,11 @@ static int nft_bitmap_init(const struct nft_set *set, static void nft_bitmap_destroy(const struct nft_set *set) { + struct nft_bitmap *priv = nft_set_priv(set); + struct nft_bitmap_elem *be, *n; + + list_for_each_entry_safe(be, n, &priv->list, head) + nft_set_elem_destroy(set, be, true); } static bool nft_bitmap_estimate(const struct nft_set_desc *desc, u32 features, -- 2.30.2