From: Steffen Klassert steffen.klassert@secunet.com
commit 86c6739eda7d2a03f2db30cbee67a5fb81afa8ba upstream.
We leak the page that we use to create skb page fragments when destroying the xfrm_state. Fix this by dropping a page reference if a page was assigned to the xfrm_state.
Fixes: cac2661c53f3 ("esp4: Avoid skb_cow_data whenever possible") Reported-by: JD jdtxs00@gmail.com Reported-by: Paul Wouters paul@nohats.ca Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/xfrm/xfrm_state.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/xfrm/xfrm_state.c +++ b/net/xfrm/xfrm_state.c @@ -449,6 +449,8 @@ static void xfrm_state_gc_destroy(struct x->type->destructor(x); xfrm_put_type(x->type); } + if (x->xfrag.page) + put_page(x->xfrag.page); xfrm_dev_state_free(x); security_xfrm_state_free(x); kfree(x);