zebra: Fix crash when dplane_fpm_nl fails to process received routes#13757
zebra: Fix crash when dplane_fpm_nl fails to process received routes#13757mjstapp merged 2 commits intoFRRouting:masterfrom
dplane_fpm_nl fails to process received routes#13757Conversation
Continuous Integration Result: FAILEDContinuous Integration Result: FAILEDTest incomplete. See below for issues. This is a comment from an automated CI system. Get source / Pull Request: SuccessfulBuilding Stage: SuccessfulBasic Tests: IncompleteTopotests debian 10 amd64 part 9: Failed (click for details)Topology Test Results are at https://ci1.netdef.org/browse/FRR-PULLREQ2-TOPO9DEB10AMD64-12212/test Topology Tests failed for Topotests debian 10 amd64 part 9 Addresssanitizer topotests part 7: Incomplete(check logs for details)Topotests Ubuntu 18.04 amd64 part 9: Failed (click for details)Topology Test Results are at https://ci1.netdef.org/browse/FRR-PULLREQ2-TOPO9U18AMD64-12212/test Topology Tests failed for Topotests Ubuntu 18.04 amd64 part 9 Successful on other platforms/tests
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ci:rerun |
Continuous Integration Result: FAILEDContinuous Integration Result: FAILEDSee below for issues. This is a comment from an automated CI system. Get source / Pull Request: SuccessfulBuilding Stage: SuccessfulBasic Tests: FailedTopotests Ubuntu 18.04 amd64 part 9: Failed (click for details)Topology Test Results are at https://ci1.netdef.org/browse/FRR-PULLREQ2-TOPO9U18AMD64-12215/test Topology Tests failed for Topotests Ubuntu 18.04 amd64 part 9 Successful on other platforms/tests
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@Mergifyio backport stable/8.5 dev/9.0 |
✅ Backports have been createdDetails
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mjstapp
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thanks for tracking this down - had one question
zebra/zebra_dplane.c
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| * necessarily to copy a route object. | ||
| */ | ||
| if (!rn || !re) { | ||
| dplane_intf_extra_list_init(&ctx->u.rinfo.intf_extra_list); |
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maybe it would make sense to make route_init_basic() able to do these key internal inits but then return early if its 're' is NULL? I'm just a little concerned that having two places is going to leave us with some other un-init problem in the future.
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@mjstapp Make sense. Thanks for the comment. I updated the PR, can you take a look?
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@cscarpitta Do we have an update here? When can we merge this PR? |
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This pull request has conflicts, please resolve those before we can evaluate the pull request. |
Continuous Integration Result: FAILEDContinuous Integration Result: FAILEDSee below for issues. This is a comment from an automated CI system. Get source / Pull Request: FailedCheckout code: Failed (click for details)PullReq merge failed. Please rebase your branch: |
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Continuous Integration Result: SUCCESSFULContinuous Integration Result: SUCCESSFULCongratulations, this patch passed basic tests Tested-by: NetDEF / OpenSourceRouting.org CI System CI System Testrun URL: https://ci1.netdef.org/browse/FRR-PULLREQ2-12783/ This is a comment from an automated CI system. Warnings Generated during build:Checkout code: Successful with additional warnings |
The function `dplane_ctx_route_init` initializes a dplane route context from the route object passed as an argument. Let's abstract this function to allow initializing the dplane route context without actually copying a route object. This allows us to use this function for initializing a dplane route context when we don't have any route to copy in it. Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
When `dplane_fpm_nl` receives a route, it allocates memory for a dplane context and calls `netlink_route_change_read_unicast_internal` without initializing the `intf_extra_list` contained in the dplane context. If `netlink_route_change_read_unicast_internal` is not able to process the route, we call `dplane_ctx_fini` to free the dplane context. This causes a crash because `dplane_ctx_fini` attempts to access the intf_extra_list which is not initialized. To solve this issue, we can call `dplane_ctx_route_init`to initialize the dplane route context properly, just after the dplane context allocation. (gdb) bt #0 0x0000555dd5ceae80 in dplane_intf_extra_list_pop (h=0x7fae1c007e68) at ../zebra/zebra_dplane.c:427 #1 dplane_ctx_free_internal (ctx=0x7fae1c0074b0) at ../zebra/zebra_dplane.c:724 FRRouting#2 0x0000555dd5cebc99 in dplane_ctx_free (pctx=0x7fae2aa88c98) at ../zebra/zebra_dplane.c:869 FRRouting#3 dplane_ctx_free (pctx=0x7fae2aa88c98, pctx@entry=0x7fae2aa78c28) at ../zebra/zebra_dplane.c:855 FRRouting#4 dplane_ctx_fini (pctx=pctx@entry=0x7fae2aa88c98) at ../zebra/zebra_dplane.c:890 FRRouting#5 0x00007fae31e93f29 in fpm_read (t=) at ../zebra/dplane_fpm_nl.c:605 FRRouting#6 0x00007fae325191dd in thread_call (thread=thread@entry=0x7fae2aa98da0) at ../lib/thread.c:2006 FRRouting#7 0x00007fae324c42b8 in fpt_run (arg=0x555dd74777c0) at ../lib/frr_pthread.c:309 FRRouting#8 0x00007fae32405ea7 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 FRRouting#9 0x00007fae32325a2f in clone () from /lib/x86_64-linux-gnu/libc.so.6 Fixes: FRRouting#13754 Signed-off-by: Carmine Scarpitta <carmine.scarpitta@uniroma2.it>
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Continuous Integration Result: FAILEDContinuous Integration Result: FAILEDSee below for issues. This is a comment from an automated CI system. Get source / Pull Request: SuccessfulBuilding Stage: SuccessfulBasic Tests: FailedTopotests Ubuntu 18.04 arm8 part 9: Failed (click for details)Topotests Ubuntu 18.04 arm8 part 9: Unknown Log URL: https://ci1.netdef.org/browse/FRR-PULLREQ2-12790/artifact/TOPO9U18ARM8/TopotestDetails/ Topotests Ubuntu 18.04 arm8 part 9: No useful log foundTopotests debian 10 amd64 part 9: Failed (click for details)Topology Test Results are at https://ci1.netdef.org/browse/FRR-PULLREQ2-TOPO9DEB10AMD64-12790/test Topology Tests failed for Topotests debian 10 amd64 part 9 Topotests Ubuntu 18.04 i386 part 9: Failed (click for details)Topology Test Results are at https://ci1.netdef.org/browse/FRR-PULLREQ2-TOPO9U18I386-12790/test Topology Tests failed for Topotests Ubuntu 18.04 i386 part 9 Successful on other platforms/tests
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This looks good to me now - thanks
Continuous Integration Result: SUCCESSFULCongratulations, this patch passed basic tests Tested-by: NetDEF / OpenSourceRouting.org CI System CI System Testrun URL: https://ci1.netdef.org/browse/FRR-PULLREQ2-12791/ This is a comment from an automated CI system. |
zebra: Fix crash when `dplane_fpm_nl` fails to process received routes (backport #13757)
zebra: Fix crash when `dplane_fpm_nl` fails to process received routes (backport #13757)
Why I did it Upgrading FRR 8.5.1 to include latest fixes. New patches that were added: Patch FRR Pull request Issue fixed 0012-zebra-Rename-vrf_lookup_by_tableid-to-zebra_vrf_look.patch FRRouting/frr#13396 #14866 0013-zebra-Move-protodown_r_bit-to-a-better-spot.patch FRRouting/frr#13396 #14866 0014-zebra-Remove-unused-dplane_intf_delete.patch FRRouting/frr#13396 #14866 0015-zebra-Remove-unused-add-variable.patch FRRouting/frr#13396 #14866 0016-zebra-Remove-duplicate-function-for-netlink-interfac.patch FRRouting/frr#13396 #14866 0017-zebra-Add-code-to-get-set-interface-to-pass-up-from-.patch FRRouting/frr#13396 #14866 0018-zebra-Use-zebra-dplane-for-RTM-link-and-addr.patch FRRouting/frr#13396 #14866 0019-zebra-Abstract-dplane_ctx_route_init-to-init-route-w.patch FRRouting/frr#13757 FRRouting/frr#13754 00020-zebra-Fix-crash-when-dplane_fpm_nl-fails-to-process-.patch FRRouting/frr#13757 FRRouting/frr#13754 Removed patches: Patch Upstream FRR commit that is present in 8.5.1 0001-Add-support-of-bgp-tcp-DSCP-value.patch FRRouting/frr@425bd64 0010-zebra-Note-when-the-netlink-DUMP-command-is-interrup.patch FRRouting/frr@2f71996 0011-bgpd-enhanced-capability-is-always-turned-on-for-int.patch FRRouting/frr@8e89adc 0012-Ensure-ospf_apiclient_lsa_originate-cannot-accidently-write-into-stack.patch FRRouting/frr@d2aeac3 , FRRouting/frr@49efc80, FRRouting/frr@ff6db10 0013-zebra-fix-dplane-fpm-nl-to-allow-for-fast-configuration.patch FRRouting/frr@551fa8c 0014-bgpd-Allow-network-XXX-to-work-with-bgp-suppress-fib.patch FRRouting/frr@4801fc4 0015-zebra-Return-statements-do-not-use-paranthesis.patch FRRouting/frr@871a16c 0016-zebra-Add-zrouter.asic_notification_nexthop_control.patch FRRouting/frr@06525c4 0017-zebra-Re-arrange-fpm_read-to-reduce-code-duplication.patch FRRouting/frr@7d83e13 0018-zebra-Add-dplane_ctx_get-set_flags.patch FRRouting/frr@10388e9 0019-zebra-Rearrange-dplane_ctx_route_init.patch FRRouting/frr@f935122 0020-zebra-Add-ctx-to-netlink-message-parsing.patch FRRouting/frr@45f0a10 0021-zebra-Read-from-the-dplane_fpm_nl-a-route-update.patch FRRouting/frr@a0e1173 0022-zebra-Fix-code-because-missing-backport.patch FRRouting/frr@07fd1f7 0024-zebra-continue-fpm-read-when-we-decide-a-netlink-message-is-not-needed.patch FRRouting/frr@c0275ab 0025-zebra-Send-nht-resolved-entry-up-to-concerned-protoc.patch FRRouting/frr@8ce0e51 0027-bgpd-Ensure-FRR-has-enough-data-to-read-in-peek_for_as4_capability-and-bgp_open_option_parse.patch FRRouting/frr@3e46b43 0028-bgpd-Ensure-that-bgp-open-message-stream-has-enough-data-to-read.patch FRRouting/frr@766eec1 Realigned patches: Old Patch New patch 0002-Reduce-severity-of-Vty-connected-from-message.patch 0001-Reduce-severity-of-Vty-connected-from-message.patch 0004-Allow-BGP-attr-NEXT_HOP-to-be-0.0.0.0-due-to-allevia.patch 0002-Allow-BGP-attr-NEXT_HOP-to-be-0.0.0.0-due-to-allevia.patch 0005-nexthops-compare-vrf-only-if-ip-type.patch 0003-nexthops-compare-vrf-only-if-ip-type.patch 0006-frr-remove-frr-log-outchannel-to-var-log-frr.log.patch 0004-frr-remove-frr-log-outchannel-to-var-log-frr.log.patch 0007-Add-support-of-bgp-l3vni-evpn.patch 0005-Add-support-of-bgp-l3vni-evpn.patch 0008-Link-local-scope-was-not-set-while-binding-socket-for-bgp-ipv6-link-local-neighbors.patch 0006-Link-local-scope-was-not-set-while-binding-socket-for-bgp-ipv6-link-local-neighbors.patch 0009-ignore-route-from-default-table.patch 0007-ignore-route-from-default-table.patch 0009-ignore-route-from-default-table.patch 0007-ignore-route-from-default-table.patch 0023-Use-vrf_id-for-vrf-not-tabled_id.patch 0008-Use-vrf_id-for-vrf-not-tabled_id.patch 0026-bgpd-Ensure-suppress-fib-pending-works-with-network-.patch 0009-bgpd-Ensure-suppress-fib-pending-works-with-network-.patch 0029-bgpd-Change-log-level-for-graceful-restart-events.patch 0010-bgpd-Change-log-level-for-graceful-restart-events.patch 0030-zebra-Static-routes-async-notification-do-not-need-t.patch 0011-zebra-Static-routes-async-notification-do-not-need-t.patch How I did it Upgrade FRR submodule. Align the patches. Integrate new patches to fix issues. How to verify it Run sonic-mgmt regression to verify
Why I did it Upgrading FRR 8.5.1 to include latest fixes. New patches that were added: Patch FRR Pull request Issue fixed 0012-zebra-Rename-vrf_lookup_by_tableid-to-zebra_vrf_look.patch FRRouting/frr#13396 sonic-net#14866 0013-zebra-Move-protodown_r_bit-to-a-better-spot.patch FRRouting/frr#13396 sonic-net#14866 0014-zebra-Remove-unused-dplane_intf_delete.patch FRRouting/frr#13396 sonic-net#14866 0015-zebra-Remove-unused-add-variable.patch FRRouting/frr#13396 sonic-net#14866 0016-zebra-Remove-duplicate-function-for-netlink-interfac.patch FRRouting/frr#13396 sonic-net#14866 0017-zebra-Add-code-to-get-set-interface-to-pass-up-from-.patch FRRouting/frr#13396 sonic-net#14866 0018-zebra-Use-zebra-dplane-for-RTM-link-and-addr.patch FRRouting/frr#13396 sonic-net#14866 0019-zebra-Abstract-dplane_ctx_route_init-to-init-route-w.patch FRRouting/frr#13757 FRRouting/frr#13754 00020-zebra-Fix-crash-when-dplane_fpm_nl-fails-to-process-.patch FRRouting/frr#13757 FRRouting/frr#13754 Removed patches: Patch Upstream FRR commit that is present in 8.5.1 0001-Add-support-of-bgp-tcp-DSCP-value.patch FRRouting/frr@425bd64 0010-zebra-Note-when-the-netlink-DUMP-command-is-interrup.patch FRRouting/frr@2f71996 0011-bgpd-enhanced-capability-is-always-turned-on-for-int.patch FRRouting/frr@8e89adc 0012-Ensure-ospf_apiclient_lsa_originate-cannot-accidently-write-into-stack.patch FRRouting/frr@d2aeac3 , FRRouting/frr@49efc80, FRRouting/frr@ff6db10 0013-zebra-fix-dplane-fpm-nl-to-allow-for-fast-configuration.patch FRRouting/frr@551fa8c 0014-bgpd-Allow-network-XXX-to-work-with-bgp-suppress-fib.patch FRRouting/frr@4801fc4 0015-zebra-Return-statements-do-not-use-paranthesis.patch FRRouting/frr@871a16c 0016-zebra-Add-zrouter.asic_notification_nexthop_control.patch FRRouting/frr@06525c4 0017-zebra-Re-arrange-fpm_read-to-reduce-code-duplication.patch FRRouting/frr@7d83e13 0018-zebra-Add-dplane_ctx_get-set_flags.patch FRRouting/frr@10388e9 0019-zebra-Rearrange-dplane_ctx_route_init.patch FRRouting/frr@f935122 0020-zebra-Add-ctx-to-netlink-message-parsing.patch FRRouting/frr@45f0a10 0021-zebra-Read-from-the-dplane_fpm_nl-a-route-update.patch FRRouting/frr@a0e1173 0022-zebra-Fix-code-because-missing-backport.patch FRRouting/frr@07fd1f7 0024-zebra-continue-fpm-read-when-we-decide-a-netlink-message-is-not-needed.patch FRRouting/frr@c0275ab 0025-zebra-Send-nht-resolved-entry-up-to-concerned-protoc.patch FRRouting/frr@8ce0e51 0027-bgpd-Ensure-FRR-has-enough-data-to-read-in-peek_for_as4_capability-and-bgp_open_option_parse.patch FRRouting/frr@3e46b43 0028-bgpd-Ensure-that-bgp-open-message-stream-has-enough-data-to-read.patch FRRouting/frr@766eec1 Realigned patches: Old Patch New patch 0002-Reduce-severity-of-Vty-connected-from-message.patch 0001-Reduce-severity-of-Vty-connected-from-message.patch 0004-Allow-BGP-attr-NEXT_HOP-to-be-0.0.0.0-due-to-allevia.patch 0002-Allow-BGP-attr-NEXT_HOP-to-be-0.0.0.0-due-to-allevia.patch 0005-nexthops-compare-vrf-only-if-ip-type.patch 0003-nexthops-compare-vrf-only-if-ip-type.patch 0006-frr-remove-frr-log-outchannel-to-var-log-frr.log.patch 0004-frr-remove-frr-log-outchannel-to-var-log-frr.log.patch 0007-Add-support-of-bgp-l3vni-evpn.patch 0005-Add-support-of-bgp-l3vni-evpn.patch 0008-Link-local-scope-was-not-set-while-binding-socket-for-bgp-ipv6-link-local-neighbors.patch 0006-Link-local-scope-was-not-set-while-binding-socket-for-bgp-ipv6-link-local-neighbors.patch 0009-ignore-route-from-default-table.patch 0007-ignore-route-from-default-table.patch 0009-ignore-route-from-default-table.patch 0007-ignore-route-from-default-table.patch 0023-Use-vrf_id-for-vrf-not-tabled_id.patch 0008-Use-vrf_id-for-vrf-not-tabled_id.patch 0026-bgpd-Ensure-suppress-fib-pending-works-with-network-.patch 0009-bgpd-Ensure-suppress-fib-pending-works-with-network-.patch 0029-bgpd-Change-log-level-for-graceful-restart-events.patch 0010-bgpd-Change-log-level-for-graceful-restart-events.patch 0030-zebra-Static-routes-async-notification-do-not-need-t.patch 0011-zebra-Static-routes-async-notification-do-not-need-t.patch How I did it Upgrade FRR submodule. Align the patches. Integrate new patches to fix issues. How to verify it Run sonic-mgmt regression to verify
Why I did it Upgrading FRR 8.5.1 to include latest fixes. New patches that were added: Patch FRR Pull request Issue fixed 0012-zebra-Rename-vrf_lookup_by_tableid-to-zebra_vrf_look.patch FRRouting/frr#13396 sonic-net#14866 0013-zebra-Move-protodown_r_bit-to-a-better-spot.patch FRRouting/frr#13396 sonic-net#14866 0014-zebra-Remove-unused-dplane_intf_delete.patch FRRouting/frr#13396 sonic-net#14866 0015-zebra-Remove-unused-add-variable.patch FRRouting/frr#13396 sonic-net#14866 0016-zebra-Remove-duplicate-function-for-netlink-interfac.patch FRRouting/frr#13396 sonic-net#14866 0017-zebra-Add-code-to-get-set-interface-to-pass-up-from-.patch FRRouting/frr#13396 sonic-net#14866 0018-zebra-Use-zebra-dplane-for-RTM-link-and-addr.patch FRRouting/frr#13396 sonic-net#14866 0019-zebra-Abstract-dplane_ctx_route_init-to-init-route-w.patch FRRouting/frr#13757 FRRouting/frr#13754 00020-zebra-Fix-crash-when-dplane_fpm_nl-fails-to-process-.patch FRRouting/frr#13757 FRRouting/frr#13754 Removed patches: Patch Upstream FRR commit that is present in 8.5.1 0001-Add-support-of-bgp-tcp-DSCP-value.patch FRRouting/frr@425bd64 0010-zebra-Note-when-the-netlink-DUMP-command-is-interrup.patch FRRouting/frr@2f71996 0011-bgpd-enhanced-capability-is-always-turned-on-for-int.patch FRRouting/frr@8e89adc 0012-Ensure-ospf_apiclient_lsa_originate-cannot-accidently-write-into-stack.patch FRRouting/frr@d2aeac3 , FRRouting/frr@49efc80, FRRouting/frr@ff6db10 0013-zebra-fix-dplane-fpm-nl-to-allow-for-fast-configuration.patch FRRouting/frr@551fa8c 0014-bgpd-Allow-network-XXX-to-work-with-bgp-suppress-fib.patch FRRouting/frr@4801fc4 0015-zebra-Return-statements-do-not-use-paranthesis.patch FRRouting/frr@871a16c 0016-zebra-Add-zrouter.asic_notification_nexthop_control.patch FRRouting/frr@06525c4 0017-zebra-Re-arrange-fpm_read-to-reduce-code-duplication.patch FRRouting/frr@7d83e13 0018-zebra-Add-dplane_ctx_get-set_flags.patch FRRouting/frr@10388e9 0019-zebra-Rearrange-dplane_ctx_route_init.patch FRRouting/frr@f935122 0020-zebra-Add-ctx-to-netlink-message-parsing.patch FRRouting/frr@45f0a10 0021-zebra-Read-from-the-dplane_fpm_nl-a-route-update.patch FRRouting/frr@a0e1173 0022-zebra-Fix-code-because-missing-backport.patch FRRouting/frr@07fd1f7 0024-zebra-continue-fpm-read-when-we-decide-a-netlink-message-is-not-needed.patch FRRouting/frr@c0275ab 0025-zebra-Send-nht-resolved-entry-up-to-concerned-protoc.patch FRRouting/frr@8ce0e51 0027-bgpd-Ensure-FRR-has-enough-data-to-read-in-peek_for_as4_capability-and-bgp_open_option_parse.patch FRRouting/frr@3e46b43 0028-bgpd-Ensure-that-bgp-open-message-stream-has-enough-data-to-read.patch FRRouting/frr@766eec1 Realigned patches: Old Patch New patch 0002-Reduce-severity-of-Vty-connected-from-message.patch 0001-Reduce-severity-of-Vty-connected-from-message.patch 0004-Allow-BGP-attr-NEXT_HOP-to-be-0.0.0.0-due-to-allevia.patch 0002-Allow-BGP-attr-NEXT_HOP-to-be-0.0.0.0-due-to-allevia.patch 0005-nexthops-compare-vrf-only-if-ip-type.patch 0003-nexthops-compare-vrf-only-if-ip-type.patch 0006-frr-remove-frr-log-outchannel-to-var-log-frr.log.patch 0004-frr-remove-frr-log-outchannel-to-var-log-frr.log.patch 0007-Add-support-of-bgp-l3vni-evpn.patch 0005-Add-support-of-bgp-l3vni-evpn.patch 0008-Link-local-scope-was-not-set-while-binding-socket-for-bgp-ipv6-link-local-neighbors.patch 0006-Link-local-scope-was-not-set-while-binding-socket-for-bgp-ipv6-link-local-neighbors.patch 0009-ignore-route-from-default-table.patch 0007-ignore-route-from-default-table.patch 0009-ignore-route-from-default-table.patch 0007-ignore-route-from-default-table.patch 0023-Use-vrf_id-for-vrf-not-tabled_id.patch 0008-Use-vrf_id-for-vrf-not-tabled_id.patch 0026-bgpd-Ensure-suppress-fib-pending-works-with-network-.patch 0009-bgpd-Ensure-suppress-fib-pending-works-with-network-.patch 0029-bgpd-Change-log-level-for-graceful-restart-events.patch 0010-bgpd-Change-log-level-for-graceful-restart-events.patch 0030-zebra-Static-routes-async-notification-do-not-need-t.patch 0011-zebra-Static-routes-async-notification-do-not-need-t.patch How I did it Upgrade FRR submodule. Align the patches. Integrate new patches to fix issues. How to verify it Run sonic-mgmt regression to verify
This PR fixes #13754.
In
dplane_fpm_nl,fpm_readallocates a dplane route context and callsnetlink_route_change_read_unicast_internalto populate the dplane context with the received route. Whennetlink_route_change_read_unicast_internalfails to process the route information, we calldplane_ctx_finito free the dplane context. However, this causes a crash becausedplane_ctx_finiattempts to access theintf_extra_listwhich is not initialized.To solve this issue, we need to initialize the
intf_extra_listproperly after allocating the dplane route context.Signed-off-by: Carmine Scarpitta carmine.scarpitta.94@gmail.com