diff options
author | Guillaume Nault <gnault@redhat.com> | 2022-01-10 16:43:06 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 12:54:33 +0300 |
commit | 7f2ca96bd26644517ab03357bcf2982cf79c2ff7 (patch) | |
tree | f1e413d852db1e14bdf9dc44748e8a5677f440d3 /net/xfrm | |
parent | 2b1415c60b2e4aff93f790a7ae374dd6ef20d3a5 (diff) | |
download | linux-7f2ca96bd26644517ab03357bcf2982cf79c2ff7.tar.xz |
xfrm: Don't accidentally set RTO_ONLINK in decode_session4()
commit 23e7b1bfed61e301853b5e35472820d919498278 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/xfrm')
-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 9f02d3fef184..c4a195cb3681 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> @@ -3294,7 +3295,7 @@ 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) { |