6.1-stable review patch. If anyone has any objections, please let me know.
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From: Pablo Neira Ayuso pablo@netfilter.org
commit 3c13725f43dcf43ad8a9bcd6a9f12add19a8f93e upstream.
All existing NFT_EXPR_STATEFUL provide a .clone interface, remove fallback to copy content of stateful expression since this is never exercised and bail out if .clone interface is not defined.
Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/netfilter/nf_tables_api.c | 15 +++++++-------- 1 file changed, 7 insertions(+), 8 deletions(-)
--- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -3123,14 +3123,13 @@ int nft_expr_clone(struct nft_expr *dst, { int err;
- if (src->ops->clone) { - dst->ops = src->ops; - err = src->ops->clone(dst, src); - if (err < 0) - return err; - } else { - memcpy(dst, src, src->ops->size); - } + if (WARN_ON_ONCE(!src->ops->clone)) + return -EINVAL; + + dst->ops = src->ops; + err = src->ops->clone(dst, src); + if (err < 0) + return err;
__module_get(src->ops->type->owner);