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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>
This commit is contained in:
Steffen Klassert 2011-06-05 20:46:03 +00:00 committed by David S. Miller
parent 665c8c8ee4
commit e756682c8b
1 changed files with 2 additions and 2 deletions
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4
net/xfrm/xfrm_replay.c
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@ -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;