netdev - [PATCH ipsec-rc 2/2] xfrm: don't skip free of empty state in acquire policy

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Message-ID: <f6883e3e9acc98bf7fe3ec74005d229a6b1c199f.1690803052.git.leon@kernel.org>
Date: Mon, 31 Jul 2023 14:38:27 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Steffen Klassert <steffen.klassert@...unet.com>
Cc: Leon Romanovsky <leonro@...dia.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Jakub Kicinski <kuba@...nel.org>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>,
	Raed Salem <raeds@...dia.com>
Subject: [PATCH ipsec-rc 2/2] xfrm: don't skip free of empty state in acquire policy

From: Leon Romanovsky <leonro@...dia.com>

In destruction flow, the assignment of NULL to xso->dev
caused to skip of xfrm_dev_state_free() call, which was
called in xfrm_state_put(to_put) routine.

Instead of open-coded variant of xfrm_dev_state_delete() and
xfrm_dev_state_free(), let's use them directly.

Fixes: f8a70afafc17 ("xfrm: add TX datapath support for IPsec packet offload mode")
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 include/net/xfrm.h    | 1 +
 net/xfrm/xfrm_state.c | 8 ++------
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 151ca95dd08d..363c7d510554 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1984,6 +1984,7 @@ static inline void xfrm_dev_state_free(struct xfrm_state *x)
 		if (dev->xfrmdev_ops->xdo_dev_state_free)
 			dev->xfrmdev_ops->xdo_dev_state_free(x);
 		xso->dev = NULL;
+		xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
 		netdev_put(dev, &xso->dev_tracker);
 	}
 }
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 49e63eea841d..bda5327bf34d 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -1324,12 +1324,8 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
 			struct xfrm_dev_offload *xso = &x->xso;
 
 			if (xso->type == XFRM_DEV_OFFLOAD_PACKET) {
-				xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
-				xso->dir = 0;
-				netdev_put(xso->dev, &xso->dev_tracker);
-				xso->dev = NULL;
-				xso->real_dev = NULL;
-				xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
+				xfrm_dev_state_delete(x);
+				xfrm_dev_state_free(x);
 			}
 #endif
 			x->km.state = XFRM_STATE_DEAD;
-- 
2.41.0