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75 lines
2.4 KiB
Diff
75 lines
2.4 KiB
Diff
From d03c0ef520f40c6de691c37e0f168c87b3423015 Mon Sep 17 00:00:00 2001
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Message-Id: <d03c0ef520f40c6de691c37e0f168c87b3423015.1514959852.git.jan.steffens@gmail.com>
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In-Reply-To: <fb89d912d5f7289d3a922c77b671e36e1c740f5e.1514959852.git.jan.steffens@gmail.com>
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References: <fb89d912d5f7289d3a922c77b671e36e1c740f5e.1514959852.git.jan.steffens@gmail.com>
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From: Steffen Klassert <steffen.klassert@secunet.com>
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Date: Wed, 15 Nov 2017 06:40:57 +0100
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Subject: [PATCH 4/7] Revert "xfrm: Fix stack-out-of-bounds read in
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xfrm_state_find."
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This reverts commit c9f3f813d462c72dbe412cee6a5cbacf13c4ad5e.
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This commit breaks transport mode when the policy template
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has widlcard addresses configured, so revert it.
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Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
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---
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net/xfrm/xfrm_policy.c | 29 ++++++++++++++++++-----------
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1 file changed, 18 insertions(+), 11 deletions(-)
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diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
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index 2a6093840e7e856e..6bc16bb61b5533ef 100644
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--- a/net/xfrm/xfrm_policy.c
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+++ b/net/xfrm/xfrm_policy.c
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@@ -1362,29 +1362,36 @@ xfrm_tmpl_resolve_one(struct xfrm_policy *policy, const struct flowi *fl,
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struct net *net = xp_net(policy);
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int nx;
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int i, error;
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+ xfrm_address_t *daddr = xfrm_flowi_daddr(fl, family);
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+ xfrm_address_t *saddr = xfrm_flowi_saddr(fl, family);
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xfrm_address_t tmp;
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for (nx = 0, i = 0; i < policy->xfrm_nr; i++) {
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struct xfrm_state *x;
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- xfrm_address_t *local;
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- xfrm_address_t *remote;
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+ xfrm_address_t *remote = daddr;
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+ xfrm_address_t *local = saddr;
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struct xfrm_tmpl *tmpl = &policy->xfrm_vec[i];
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- remote = &tmpl->id.daddr;
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- local = &tmpl->saddr;
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- if (xfrm_addr_any(local, tmpl->encap_family)) {
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- error = xfrm_get_saddr(net, fl->flowi_oif,
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- &tmp, remote,
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- tmpl->encap_family, 0);
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- if (error)
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- goto fail;
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- local = &tmp;
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+ if (tmpl->mode == XFRM_MODE_TUNNEL ||
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+ tmpl->mode == XFRM_MODE_BEET) {
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+ remote = &tmpl->id.daddr;
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+ local = &tmpl->saddr;
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+ if (xfrm_addr_any(local, tmpl->encap_family)) {
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+ error = xfrm_get_saddr(net, fl->flowi_oif,
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+ &tmp, remote,
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+ tmpl->encap_family, 0);
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+ if (error)
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+ goto fail;
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+ local = &tmp;
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+ }
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}
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x = xfrm_state_find(remote, local, fl, tmpl, policy, &error, family);
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if (x && x->km.state == XFRM_STATE_VALID) {
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xfrm[nx++] = x;
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+ daddr = remote;
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+ saddr = local;
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continue;
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}
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if (x) {
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--
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2.15.1
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