Guillaume Nault 7f2ca96bd2 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>
2022-01-27 10:54:33 +01:00
..
2021-06-03 09:00:50 +02:00
2021-08-04 12:46:43 +02:00
2022-01-05 12:40:30 +01:00
2021-06-18 10:00:06 +02:00