netdev - [PATCH net] xfrm: Fix memory leak of aead algorithm name

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Message-ID: <AM4PR0501MB19404B000E4D3A2CF3CB80DEDBF50@AM4PR0501MB1940.eurprd05.prod.outlook.com>
Date:   Sun, 18 Sep 2016 07:42:53 +0000
From:   Ilan Tayari <ilant@...lanox.com>
To:     Steffen Klassert <steffen.klassert@...unet.com>,
        Herbert Xu <herbert@...dor.apana.org.au>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH net] xfrm: Fix memory leak of aead algorithm name

commit 1a6509d99122 ("[IPSEC]: Add support for combined mode algorithms")
introduced aead. The function attach_aead kmemdup()s the algorithm
name during xfrm_state_construct().
However this memory is never freed.
Implementation has since been slightly modified in
commit ee5c23176fcc ("xfrm: Clone states properly on migration")
without resolving this leak.
This patch adds a kfree() call for the aead algorithm name.

Fixes: 1a6509d99122 ("[IPSEC]: Add support for combined mode algorithms")
Signed-off-by: Ilan Tayari <ilant@...lanox.com>
---
 net/xfrm/xfrm_state.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 9895a8c..a30f898d 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -332,6 +332,7 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x)
 {
 	tasklet_hrtimer_cancel(&x->mtimer);
 	del_timer_sync(&x->rtimer);
+	kfree(x->aead);
 	kfree(x->aalg);
 	kfree(x->ealg);
 	kfree(x->calg);
-- 
1.8.3.1