From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B0D728ED for ; Mon, 12 Dec 2022 13:45:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 088EEC433F0; Mon, 12 Dec 2022 13:45:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670852738; bh=b+8E8YGwL5yBhGdPGzUCl9I2YmWcSaMsHNnt569A5kU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LNylVapt2kbvlp3vuSVAVS5ct1J2v2XP59KWK2a3jkttTlX84CqgiAuOj8P3Y8jte E611Jdz3E5LkWHvr9XqJ6RFLSoAnFgVLrT1ZbbUYO1tBiBBN6FGWOTyTT7miVXepLV MZ2wCYUdOv5PBR1OUqcS3jDMFrp4KfoV5X3aDHhQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ido Schimmel , David Ahern , Jakub Kicinski , Sasha Levin Subject: [PATCH 6.0 142/157] ipv4: Fix incorrect route flushing when source address is deleted Date: Mon, 12 Dec 2022 14:18:10 +0100 Message-Id: <20221212130940.833725459@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221212130934.337225088@linuxfoundation.org> References: <20221212130934.337225088@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Ido Schimmel [ Upstream commit f96a3d74554df537b6db5c99c27c80e7afadc8d1 ] Cited commit added the table ID to the FIB info structure, but did not prevent structures with different table IDs from being consolidated. This can lead to routes being flushed from a VRF when an address is deleted from a different VRF. Fix by taking the table ID into account when looking for a matching FIB info. This is already done for FIB info structures backed by a nexthop object in fib_find_info_nh(). Add test cases that fail before the fix: # ./fib_tests.sh -t ipv4_del_addr IPv4 delete address route tests Regular FIB info TEST: Route removed from VRF when source address deleted [ OK ] TEST: Route in default VRF not removed [ OK ] TEST: Route removed in default VRF when source address deleted [ OK ] TEST: Route in VRF is not removed by address delete [ OK ] Identical FIB info with different table ID TEST: Route removed from VRF when source address deleted [FAIL] TEST: Route in default VRF not removed [ OK ] RTNETLINK answers: File exists TEST: Route removed in default VRF when source address deleted [ OK ] TEST: Route in VRF is not removed by address delete [FAIL] Tests passed: 6 Tests failed: 2 And pass after: # ./fib_tests.sh -t ipv4_del_addr IPv4 delete address route tests Regular FIB info TEST: Route removed from VRF when source address deleted [ OK ] TEST: Route in default VRF not removed [ OK ] TEST: Route removed in default VRF when source address deleted [ OK ] TEST: Route in VRF is not removed by address delete [ OK ] Identical FIB info with different table ID TEST: Route removed from VRF when source address deleted [ OK ] TEST: Route in default VRF not removed [ OK ] TEST: Route removed in default VRF when source address deleted [ OK ] TEST: Route in VRF is not removed by address delete [ OK ] Tests passed: 8 Tests failed: 0 Fixes: 5a56a0b3a45d ("net: Don't delete routes in different VRFs") Signed-off-by: Ido Schimmel Reviewed-by: David Ahern Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/ipv4/fib_semantics.c | 1 + tools/testing/selftests/net/fib_tests.sh | 27 ++++++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index cb24260692e1..7885b2f15315 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -423,6 +423,7 @@ static struct fib_info *fib_find_info(struct fib_info *nfi) nfi->fib_prefsrc == fi->fib_prefsrc && nfi->fib_priority == fi->fib_priority && nfi->fib_type == fi->fib_type && + nfi->fib_tb_id == fi->fib_tb_id && memcmp(nfi->fib_metrics, fi->fib_metrics, sizeof(u32) * RTAX_MAX) == 0 && !((nfi->fib_flags ^ fi->fib_flags) & ~RTNH_COMPARE_MASK) && diff --git a/tools/testing/selftests/net/fib_tests.sh b/tools/testing/selftests/net/fib_tests.sh index 2271a8727f62..11c89148b19f 100755 --- a/tools/testing/selftests/net/fib_tests.sh +++ b/tools/testing/selftests/net/fib_tests.sh @@ -1711,13 +1711,19 @@ ipv4_del_addr_test() $IP addr add dev dummy1 172.16.104.1/24 $IP addr add dev dummy1 172.16.104.11/24 + $IP addr add dev dummy1 172.16.104.12/24 $IP addr add dev dummy2 172.16.104.1/24 $IP addr add dev dummy2 172.16.104.11/24 + $IP addr add dev dummy2 172.16.104.12/24 $IP route add 172.16.105.0/24 via 172.16.104.2 src 172.16.104.11 + $IP route add 172.16.106.0/24 dev lo src 172.16.104.12 $IP route add vrf red 172.16.105.0/24 via 172.16.104.2 src 172.16.104.11 + $IP route add vrf red 172.16.106.0/24 dev lo src 172.16.104.12 set +e # removing address from device in vrf should only remove route from vrf table + echo " Regular FIB info" + $IP addr del dev dummy2 172.16.104.11/24 $IP ro ls vrf red | grep -q 172.16.105.0/24 log_test $? 1 "Route removed from VRF when source address deleted" @@ -1735,6 +1741,27 @@ ipv4_del_addr_test() $IP ro ls vrf red | grep -q 172.16.105.0/24 log_test $? 0 "Route in VRF is not removed by address delete" + # removing address from device in vrf should only remove route from vrf + # table even when the associated fib info only differs in table ID + echo " Identical FIB info with different table ID" + + $IP addr del dev dummy2 172.16.104.12/24 + $IP ro ls vrf red | grep -q 172.16.106.0/24 + log_test $? 1 "Route removed from VRF when source address deleted" + + $IP ro ls | grep -q 172.16.106.0/24 + log_test $? 0 "Route in default VRF not removed" + + $IP addr add dev dummy2 172.16.104.12/24 + $IP route add vrf red 172.16.106.0/24 dev lo src 172.16.104.12 + + $IP addr del dev dummy1 172.16.104.12/24 + $IP ro ls | grep -q 172.16.106.0/24 + log_test $? 1 "Route removed in default VRF when source address deleted" + + $IP ro ls vrf red | grep -q 172.16.106.0/24 + log_test $? 0 "Route in VRF is not removed by address delete" + $IP li del dummy1 $IP li del dummy2 cleanup -- 2.35.1