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| author | Guillaume Nault <gnault@redhat.com> | 2022-01-10 16:43:06 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-01-12 07:36:08 +0300 |
| commit | 23e7b1bfed61e301853b5e35472820d919498278 (patch) | |
| tree | 549b4fea8308a48d1b0030edc194f9b2f3cf12cc /net/xfrm/xfrm_policy.c | |
| parent | 274c224062ff9545d8df2a6e4764a5fd660d792e (diff) | |
| download | linux-23e7b1bfed61e301853b5e35472820d919498278.tar.xz | |
xfrm: Don't accidentally set RTO_ONLINK in decode_session4()
Similar to commit 94e2238969e8 ("xfrm4: strip ECN bits from tos field"),
clear the ECN bits from iph->tos when setting ->flowi4_tos.
This ensures that the last bit of ->flowi4_tos is cleared, so
ip_route_output_key_hash() isn't going to restrict the scope of the
route lookup.
Use ~INET_ECN_MASK instead of IPTOS_RT_MASK, because we have no reason
to clear the high order bits.
Found by code inspection, compile tested only.
Fixes: 4da3089f2b58 ("[IPSEC]: Use TOS when doing tunnel lookups")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/xfrm/xfrm_policy.c')
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index dccb8f3318ef..04d1ce9b510f 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -31,6 +31,7 @@ #include <linux/if_tunnel.h> #include <net/dst.h> #include <net/flow.h> +#include <net/inet_ecn.h> #include <net/xfrm.h> #include <net/ip.h> #include <net/gre.h> @@ -3295,7 +3296,7 @@ decode_session4(struct sk_buff *skb, struct flowi *fl, bool reverse) fl4->flowi4_proto = iph->protocol; fl4->daddr = reverse ? iph->saddr : iph->daddr; fl4->saddr = reverse ? iph->daddr : iph->saddr; - fl4->flowi4_tos = iph->tos; + fl4->flowi4_tos = iph->tos & ~INET_ECN_MASK; if (!ip_is_fragment(iph)) { switch (iph->protocol) { |