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authorSteffen Klassert <steffen.klassert@secunet.com>2011-06-05 20:46:03 +0000
committerDavid S. Miller <davem@davemloft.net>2011-06-07 21:14:39 -0700
commite756682c8baa47da1648c0c016e9f48ed66bc32d (patch)
treee226eebfbdb826f79607751f719ebaaaf810b229 /net/xfrm/xfrm_replay.c
parent665c8c8ee405738375b679246b49342ce38ba056 (diff)
downloadvexpress-lsk-e756682c8baa47da1648c0c016e9f48ed66bc32d.tar.gz
xfrm: Fix off by one in the replay advance functions
We may write 4 byte too much when we reinitialize the anti replay window in the replay advance functions. This patch fixes this by adjusting the last index of the initialization loop. Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm/xfrm_replay.c')
-rw-r--r--net/xfrm/xfrm_replay.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/xfrm/xfrm_replay.c b/net/xfrm/xfrm_replay.c
index 47f1b8638df..b11ea692bd7 100644
--- a/net/xfrm/xfrm_replay.c
+++ b/net/xfrm/xfrm_replay.c
@@ -265,7 +265,7 @@ static void xfrm_replay_advance_bmp(struct xfrm_state *x, __be32 net_seq)
bitnr = bitnr & 0x1F;
replay_esn->bmp[nr] |= (1U << bitnr);
} else {
- nr = replay_esn->replay_window >> 5;
+ nr = (replay_esn->replay_window - 1) >> 5;
for (i = 0; i <= nr; i++)
replay_esn->bmp[i] = 0;
@@ -471,7 +471,7 @@ static void xfrm_replay_advance_esn(struct xfrm_state *x, __be32 net_seq)
bitnr = bitnr & 0x1F;
replay_esn->bmp[nr] |= (1U << bitnr);
} else {
- nr = replay_esn->replay_window >> 5;
+ nr = (replay_esn->replay_window - 1) >> 5;
for (i = 0; i <= nr; i++)
replay_esn->bmp[i] = 0;