[{"id":1766673,"web_url":"http://patchwork.ozlabs.org/comment/1766673/","msgid":"","list_archive_url":null,"date":"2017-09-12T04:37:59","subject":"Re: [ovs-dev] [PATCH] conntrack: Fix conn_type need be checked when\n\tremove rev_conn.","submitter":{"id":68060,"url":"http://patchwork.ozlabs.org/api/people/68060/","name":"Darrell Ball","email":"dlu998@gmail.com"},"content":"We cannot merge this patch.\n\nCan you provide answers to the questions I asked here\n\nhttps://mail.openvswitch.org/pipermail/ovs-discuss/2017-September/045308.html\n\nThanks Darrell\n\n\nOn Mon, Sep 11, 2017 at 2:49 AM, w00273186 wrote:\n\n> From: Yunjian Wang \n>\n> The rev_conn need will be removed, only when conn_type is\n> CT_CONN_TYPE_UN_NAT.\n> This crash will be triggered when remove conn in ct-clean thread.\n>\n> Reported-by: Lili Huang \n> Signed-off-by: Yunjian Wang \n> ---\n> lib/conntrack.c | 7 ++++---\n> 1 file changed, 4 insertions(+), 3 deletions(-)\n>\n> diff --git a/lib/conntrack.c b/lib/conntrack.c\n> index 419cb1d..c1adb56 100644\n> --- a/lib/conntrack.c\n> +++ b/lib/conntrack.c\n> @@ -684,9 +684,10 @@ nat_clean(struct conntrack *ct, struct conn *conn,\n>\n> /* In the unlikely event, rev conn was recreated, then skip\n> * rev_conn cleanup. */\n> - if (rev_conn && (!nat_conn_key_node ||\n> - conn_key_cmp(&nat_conn_key_node->value,\n> - &rev_conn->rev_key))) {\n> + if (rev_conn &&\n> + (rev_conn->conn_type == CT_CONN_TYPE_UN_NAT) &&\n> + (!nat_conn_key_node || conn_key_cmp(&nat_conn_key_node->value,\n> + &rev_conn->rev_key))) {\n> hmap_remove(&ct->buckets[bucket_rev_conn].connections,\n> &rev_conn->node);\n> free(rev_conn);\n> --\n> 1.8.3.1\n>\n>\n> _______________________________________________\n> dev mailing list\n> dev@openvswitch.org\n> https://mail.openvswitch.org/mailman/listinfo/ovs-dev\n>","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","dev@openvswitch.org"],"Delivered-To":["patchwork-incoming@bilbo.ozlabs.org","ovs-dev@mail.linuxfoundation.org"],"Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=openvswitch.org\n\t(client-ip=140.211.169.12; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"ovs-dev-bounces@openvswitch.org","Errors-To":"ovs-dev-bounces@openvswitch.org"}},{"id":1774009,"web_url":"http://patchwork.ozlabs.org/comment/1774009/","msgid":"<34EFBCA9F01B0748BEB6B629CE643AE60C6454C1@dggemm513-mbx.china.huawei.com>","list_archive_url":null,"date":"2017-09-23T09:35:49","subject":"Re: [ovs-dev] [PATCH] conntrack: Fix conn_type need be checked when\n\tremove rev_conn.","submitter":{"id":69073,"url":"http://patchwork.ozlabs.org/api/people/69073/","name":"Yunjian Wang","email":"wangyunjian@huawei.com"},"content":"We use hping3 to send random tcp, udp from VM1 to VM2. We met a issue that conn_lookup( ) will find\nrev_conn->conn_type = CT_CONN_TYPE_DEFAULT in nat_clean().\n\nIs this rev_conn->conn_type = CT_CONN_TYPE_DEFAULT ok?\n\nI think the rev_conn->conn_type need to be CT_CONN_TYPE_UN_NAT.\n\nFrom: Darrell Ball [mailto:dlu998@gmail.com]\nSent: Tuesday, September 12, 2017 12:38 PM\nTo: wangyunjian \nCc: ovs dev ; Huanglili (lee) ; blp@ovs.org\nSubject: Re: [ovs-dev] [PATCH] conntrack: Fix conn_type need be checked when remove rev_conn.\n\nWe cannot merge this patch.\n\nCan you provide answers to the questions I asked here\n\nhttps://mail.openvswitch.org/pipermail/ovs-discuss/2017-September/045308.html\n\nThanks Darrell\n\n\nOn Mon, Sep 11, 2017 at 2:49 AM, w00273186 > wrote:\nFrom: Yunjian Wang >\n\nThe rev_conn need will be removed, only when conn_type is CT_CONN_TYPE_UN_NAT.\nThis crash will be triggered when remove conn in ct-clean thread.\n\nReported-by: Lili Huang >\nSigned-off-by: Yunjian Wang >\n---\n lib/conntrack.c | 7 ++++---\n 1 file changed, 4 insertions(+), 3 deletions(-)\n\ndiff --git a/lib/conntrack.c b/lib/conntrack.c\nindex 419cb1d..c1adb56 100644\n--- a/lib/conntrack.c\n+++ b/lib/conntrack.c\n@@ -684,9 +684,10 @@ nat_clean(struct conntrack *ct, struct conn *conn,\n\n /* In the unlikely event, rev conn was recreated, then skip\n * rev_conn cleanup. */\n- if (rev_conn && (!nat_conn_key_node ||\n- conn_key_cmp(&nat_conn_key_node->value,\n- &rev_conn->rev_key))) {\n+ if (rev_conn &&\n+ (rev_conn->conn_type == CT_CONN_TYPE_UN_NAT) &&\n+ (!nat_conn_key_node || conn_key_cmp(&nat_conn_key_node->value,\n+ &rev_conn->rev_key))) {\n hmap_remove(&ct->buckets[bucket_rev_conn].connections,\n &rev_conn->node);\n free(rev_conn);\n--\n1.8.3.1","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","dev@openvswitch.org"],"Delivered-To":["patchwork-incoming@bilbo.ozlabs.org","ovs-dev@mail.linuxfoundation.org"],"Authentication-Results":"ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=openvswitch.org\n\t(client-ip=140.211.169.12; 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charset=\"us-ascii\"","Content-Transfer-Encoding":"7bit","Sender":"ovs-dev-bounces@openvswitch.org","Errors-To":"ovs-dev-bounces@openvswitch.org"}},{"id":1775971,"web_url":"http://patchwork.ozlabs.org/comment/1775971/","msgid":"<163C7B17-C8F6-442E-9AD6-2031C624B988@vmware.com>","list_archive_url":null,"date":"2017-09-27T01:02:43","subject":"Re: [ovs-dev] [PATCH] conntrack: Fix conn_type need be checked when\n\tremove rev_conn.","submitter":{"id":68212,"url":"http://patchwork.ozlabs.org/api/people/68212/","name":"Darrell Ball","email":"dball@vmware.com"},"content":"On 9/23/17, 2:36 AM, \"ovs-dev-bounces@openvswitch.org on behalf of wangyunjian\" wrote:\r\n\r\n We use hping3 to send random tcp, udp from VM1 to VM2. We met a issue that conn_lookup( ) will find\r\n rev_conn->conn_type = CT_CONN_TYPE_DEFAULT in nat_clean().\r\n\r\n[Darrell] So you are sending traffic in one direction between 2 OVS ports ?\r\n What is the associated packet src/dst IP and src/dst ports, conn key src/dst addresses, src/dst ports\r\n and reverse conn key src/dst addresses, src/dst ports causing the problem?\r\n Is it the TCP or UDP traffic related ?\r\n \r\n Is this rev_conn->conn_type = CT_CONN_TYPE_DEFAULT ok?\r\n\r\n[Darrell] I asked for information related to such a possible case, but no details were provided yet – see link below.\r\n Furthermore, the other information provided was not consistent, as mentioned earlier.\r\n The data would need to be from a non-instrumented version of the code.\r\n \r\n I think the rev_conn->conn_type need to be CT_CONN_TYPE_UN_NAT.\r\n\r\n\r\n From: Darrell Ball [mailto:dlu998@gmail.com]\r\n Sent: Tuesday, September 12, 2017 12:38 PM\r\n To: wangyunjian \r\n Cc: ovs dev ; Huanglili (lee) ; blp@ovs.org\r\n Subject: Re: [ovs-dev] [PATCH] conntrack: Fix conn_type need be checked when remove rev_conn.\r\n \r\n We cannot merge this patch.\r\n \r\n Can you provide answers to the questions I asked here\r\n \r\n https://urldefense.proofpoint.com/v2/url?u=https-3A__mail.openvswitch.org_pipermail_ovs-2Ddiscuss_2017-2DSeptember_045308.html&d=DwICAg&c=uilaK90D4TOVoH58JNXRgQ&r=BVhFA09CGX7JQ5Ih-uZnsw&m=lN8LgYzgffaggReqxu_7a9QKH74RKoTbK0Faru94z7o&s=l8K4j912IB0MotzNP8RaUgLFTrO4BI9QTggLebSzhoY&e= \r\n \r\n Thanks Darrell\r\n \r\n \r\n On Mon, Sep 11, 2017 at 2:49 AM, w00273186 > wrote:\r\n From: Yunjian Wang >\r\n \r\n The rev_conn need will be removed, only when conn_type is CT_CONN_TYPE_UN_NAT.\r\n This crash will be triggered when remove conn in ct-clean thread.\r\n \r\n Reported-by: Lili Huang >\r\n Signed-off-by: Yunjian Wang >\r\n ---\r\n lib/conntrack.c | 7 ++++---\r\n 1 file changed, 4 insertions(+), 3 deletions(-)\r\n \r\n diff --git a/lib/conntrack.c b/lib/conntrack.c\r\n index 419cb1d..c1adb56 100644\r\n --- a/lib/conntrack.c\r\n +++ b/lib/conntrack.c\r\n @@ -684,9 +684,10 @@ nat_clean(struct conntrack *ct, struct conn *conn,\r\n \r\n /* In the unlikely event, rev conn was recreated, then skip\r\n * rev_conn cleanup. */\r\n - if (rev_conn && (!nat_conn_key_node ||\r\n - conn_key_cmp(&nat_conn_key_node->value,\r\n - &rev_conn->rev_key))) {\r\n + if (rev_conn &&\r\n + (rev_conn->conn_type == CT_CONN_TYPE_UN_NAT) &&\r\n + (!nat_conn_key_node || conn_key_cmp(&nat_conn_key_node->value,\r\n + &rev_conn->rev_key))) {\r\n hmap_remove(&ct->buckets[bucket_rev_conn].connections,\r\n &rev_conn->node);\r\n free(rev_conn);\r\n --\r\n 1.8.3.1\r\n \r\n \r\n _______________________________________________\r\n dev mailing list\r\n dev@openvswitch.org\r\n https://urldefense.proofpoint.com/v2/url?u=https-3A__mail.openvswitch.org_mailman_listinfo_ovs-2Ddev&d=DwICAg&c=uilaK90D4TOVoH58JNXRgQ&r=BVhFA09CGX7JQ5Ih-uZnsw&m=lN8LgYzgffaggReqxu_7a9QKH74RKoTbK0Faru94z7o&s=z8oNo064OLtfO_bcwjyMAq0xXydcu0oWif5YkLENYtw&e= \r\n \r\n _______________________________________________\r\n dev mailing list\r\n dev@openvswitch.org\r\n https://urldefense.proofpoint.com/v2/url?u=https-3A__mail.openvswitch.org_mailman_listinfo_ovs-2Ddev&d=DwICAg&c=uilaK90D4TOVoH58JNXRgQ&r=BVhFA09CGX7JQ5Ih-uZnsw&m=lN8LgYzgffaggReqxu_7a9QKH74RKoTbK0Faru94z7o&s=z8oNo064OLtfO_bcwjyMAq0xXydcu0oWif5YkLENYtw&e=","headers":{"Return-Path":"","X-Original-To":["incoming@patchwork.ozlabs.org","dev@openvswitch.org"],"Delivered-To":["patchwork-incoming@bilbo.ozlabs.org","ovs-dev@mail.linuxfoundation.org"],"Authentication-Results":["ozlabs.org;\n\tspf=pass (mailfrom) smtp.mailfrom=openvswitch.org\n\t(client-ip=140.211.169.12; 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