diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-02-13 13:03:53 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2019-02-13 18:14:54 +0100 |
| commit | 753c111f655e38bbd52fc01321266633f022ebe2 (patch) | |
| tree | d060b6607757bd234625b6bc2c9ffeccfbbf62f7 /net/netfilter | |
| parent | 098e13f5b21d3398065fce8780f07a3ef62f4812 (diff) | |
netfilter: nft_compat: use-after-free when deleting targets
Fetch pointer to module before target object is released.
Fixes: 29e3880109e3 ("netfilter: nf_tables: fix use-after-free when deleting compat expressions")
Fixes: 0ca743a55991 ("netfilter: nf_tables: add compatibility layer for x_tables")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nft_compat.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/netfilter/nft_compat.c b/net/netfilter/nft_compat.c index fe64df848365..0a4bad55a8aa 100644 --- a/net/netfilter/nft_compat.c +++ b/net/netfilter/nft_compat.c @@ -315,6 +315,7 @@ nft_target_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) { struct xt_target *target = expr->ops->data; void *info = nft_expr_priv(expr); + struct module *me = target->me; struct xt_tgdtor_param par; par.net = ctx->net; @@ -325,7 +326,7 @@ nft_target_destroy(const struct nft_ctx *ctx, const struct nft_expr *expr) par.target->destroy(&par); if (nft_xt_put(container_of(expr->ops, struct nft_xt, ops))) - module_put(target->me); + module_put(me); } static int nft_extension_dump_info(struct sk_buff *skb, int attr, |