[patch] netfilter: nf_tables: use _safe version of list_for_each
From: Dan Carpenter <hidden>
Date: 2013-11-04 12:58:56
Also in:
kernel-janitors, netfilter-devel
Subsystem:
netfilter, networking [general], the rest · Maintainers:
Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
We need to use the _safe version of list_for_each_entry() here otherwise we have a use after free bug. Signed-off-by: Dan Carpenter <redacted>
diff --git a/net/netfilter/nft_compat.c b/net/netfilter/nft_compat.c
index 4811f76..a82667c 100644
--- a/net/netfilter/nft_compat.c
+++ b/net/netfilter/nft_compat.c@@ -634,9 +634,9 @@ nft_match_select_ops(const struct nft_ctx *ctx, static void nft_match_release(void) { - struct nft_xt *nft_match; + struct nft_xt *nft_match, *tmp; - list_for_each_entry(nft_match, &nft_match_list, head) + list_for_each_entry_safe(nft_match, tmp, &nft_match_list, head) kfree(nft_match); }
@@ -705,9 +705,9 @@ nft_target_select_ops(const struct nft_ctx *ctx, static void nft_target_release(void) { - struct nft_xt *nft_target; + struct nft_xt *nft_target, *tmp; - list_for_each_entry(nft_target, &nft_target_list, head) + list_for_each_entry_safe(nft_target, tmp, &nft_target_list, head) kfree(nft_target); }