FYI, we noticed the following commit (built with gcc-7): commit: d5382fef70ce273608d6fc652c24f075de3737ef ("ipv6: Stop sending in-kernel notifications for each nexthop") https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux.git master in testcase: kernel_selftests with following parameters: group: kselftests-02 test-description: The kernel contains a set of "self tests" under the tools/testing/selftests/ directory. These are intended to be small unit tests to exercise individual code paths in the kernel. test-url: https://www.kernel.org/doc/Documentation/kselftest.txt on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot # selftests: net: fib_tests.sh # # Single path route test # Start point # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # Nexthop device deleted # TEST: IPv4 fibmatch - no route [ OK ] # TEST: IPv6 fibmatch - no route [ OK ] # # Multipath route test # Start point # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # One nexthop device deleted # TEST: IPv4 - multipath route removed on delete [ OK ] # TEST: IPv6 - multipath down to single path [ OK ] # Second nexthop device deleted # TEST: IPv6 - no route [ OK ] # # Single path, admin down # Start point # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # Route deleted on down # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # # Admin down multipath # Verify start point # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # One device down, one up # TEST: IPv4 fibmatch on down device [ OK ] # TEST: IPv6 fibmatch on down device [ OK ] # TEST: IPv4 fibmatch on up device [ OK ] # TEST: IPv6 fibmatch on up device [ OK ] # TEST: IPv4 flags on down device [ OK ] # TEST: IPv6 flags on down device [ OK ] # TEST: IPv4 flags on up device [ OK ] # TEST: IPv6 flags on up device [ OK ] # Other device down and up # TEST: IPv4 fibmatch on down device [ OK ] # TEST: IPv6 fibmatch on down device [ OK ] # TEST: IPv4 fibmatch on up device [ OK ] # TEST: IPv6 fibmatch on up device [ OK ] # TEST: IPv4 flags on down device [ OK ] # TEST: IPv6 flags on down device [ OK ] # TEST: IPv4 flags on up device [ OK ] # TEST: IPv6 flags on up device [ OK ] # Both devices down # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # # Local carrier tests - single path # Start point # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # TEST: IPv4 - no linkdown flag [ OK ] # TEST: IPv6 - no linkdown flag [ OK ] # Carrier off on nexthop # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # TEST: IPv4 - linkdown flag set [ OK ] # TEST: IPv6 - linkdown flag set [ OK ] # Route to local address with carrier down # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # TEST: IPv4 linkdown flag set [ OK ] # TEST: IPv6 linkdown flag set [ OK ] # # Single path route carrier test # Start point # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # TEST: IPv4 no linkdown flag [ OK ] # TEST: IPv6 no linkdown flag [ OK ] # Carrier down # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # TEST: IPv4 linkdown flag set [ OK ] # TEST: IPv6 linkdown flag set [ OK ] # Second address added with carrier down # TEST: IPv4 fibmatch [ OK ] # TEST: IPv6 fibmatch [ OK ] # TEST: IPv4 linkdown flag set [ OK ] # TEST: IPv6 linkdown flag set [ OK ] # # IPv4 nexthop tests # <<< write me >>> # # IPv6 nexthop tests # TEST: Directly connected nexthop, unicast address [ OK ] # TEST: Directly connected nexthop, unicast address with device [ OK ] # TEST: Gateway is linklocal address [ OK ] # TEST: Gateway is linklocal address, no device [ OK ] # TEST: Gateway can not be local unicast address [ OK ] # TEST: Gateway can not be local unicast address, with device [ OK ] # TEST: Gateway can not be a local linklocal address [ OK ] # TEST: Gateway can be local address in a VRF [ OK ] # TEST: Gateway can be local address in a VRF, with device [ OK ] # TEST: Gateway can be local linklocal address in a VRF [ OK ] # TEST: Redirect to VRF lookup [ OK ] # TEST: VRF route, gateway can be local address in default VRF [ OK ] # TEST: VRF route, gateway can not be a local address [ OK ] # TEST: VRF route, gateway can not be a local addr with device [ OK ] # # IPv6 route add / append tests # TEST: Attempt to add duplicate route - gw [ OK ] # TEST: Attempt to add duplicate route - dev only [ OK ] # TEST: Attempt to add duplicate route - reject route [ OK ] # TEST: Append nexthop to existing route - gw [ OK ] # TEST: Add multipath route [ OK ] # TEST: Attempt to add duplicate multipath route [ OK ] # TEST: Route add with different metrics [ OK ] # TEST: Route delete with metric [ OK ] # # IPv6 route replace tests # TEST: Single path with single path [ OK ] # TEST: Single path with multipath [ OK ] # TEST: Single path with single path via multipath attribute [ OK ] # TEST: Invalid nexthop [ OK ] # TEST: Single path - replace of non-existent route [ OK ] # TEST: Multipath with multipath [ OK ] # TEST: Multipath with single path [ OK ] # TEST: Multipath with single path via multipath attribute [ OK ] # TEST: Multipath - invalid first nexthop [ OK ] # TEST: Multipath - invalid second nexthop [ OK ] # TEST: Multipath - replace of non-existent route [ OK ] # # IPv4 route add / append tests # TEST: Attempt to add duplicate route - gw [ OK ] # TEST: Attempt to add duplicate route - dev only [ OK ] # TEST: Attempt to add duplicate route - reject route [ OK ] # TEST: Add new nexthop for existing prefix [ OK ] # TEST: Append nexthop to existing route - gw [ OK ] # TEST: Append nexthop to existing route - dev only [ OK ] # TEST: Append nexthop to existing route - reject route [ OK ] # TEST: Append nexthop to existing reject route - gw [ OK ] # TEST: Append nexthop to existing reject route - dev only [ OK ] # TEST: add multipath route [ OK ] # TEST: Attempt to add duplicate multipath route [ OK ] # TEST: Route add with different metrics [ OK ] # TEST: Route delete with metric [ OK ] # # IPv4 route replace tests # TEST: Single path with single path [ OK ] # TEST: Single path with multipath [ OK ] # TEST: Single path with reject route [ OK ] # TEST: Single path with single path via multipath attribute [ OK ] # TEST: Invalid nexthop [ OK ] # TEST: Single path - replace of non-existent route [ OK ] # TEST: Multipath with multipath [ OK ] # TEST: Multipath with single path [ OK ] # TEST: Multipath with single path via multipath attribute [ OK ] # TEST: Multipath with reject route [ OK ] # TEST: Multipath - invalid first nexthop [ OK ] # TEST: Multipath - invalid second nexthop [ OK ] # TEST: Multipath - replace of non-existent route [ OK ] # # IPv6 prefix route tests # TEST: Default metric [ OK ] # TEST: User specified metric on first device [ OK ] # TEST: User specified metric on second device [ OK ] # TEST: Delete of address on first device [ OK ] # TEST: Modify metric of address [ OK ] # TEST: Prefix route removed on link down [ OK ] # TEST: Prefix route with metric on link up [ OK ] # # IPv4 prefix route tests # TEST: Default metric [ OK ] # TEST: User specified metric on first device [ OK ] # TEST: User specified metric on second device [ OK ] # TEST: Delete of address on first device [ OK ] # TEST: Modify metric of address [ OK ] # TEST: Prefix route removed on link down [ OK ] # TEST: Prefix route with metric on link up [ OK ] # # IPv6 routes with metrics # TEST: Single path route with mtu metric [FAIL] # TEST: Multipath route via 2 single routes with mtu metric on first [FAIL] # TEST: Multipath route via 2 single routes with mtu metric on 2nd [FAIL] # TEST: Multipath route with mtu metric [FAIL] # RTNETLINK answers: No route to host # TEST: Using route with mtu metric [FAIL] # TEST: Invalid metric (fails metric_convert) [ OK ] # # IPv4 route add / append tests # TEST: Single path route with mtu metric [ OK ] # TEST: Multipath route with mtu metric [ OK ] # TEST: Using route with mtu metric [ OK ] # TEST: Invalid metric (fails metric_convert) [ OK ] # # IPv4 route with IPv6 gateway tests # TEST: Single path route with IPv6 gateway [FAIL] # TEST: Single path route with IPv6 gateway - ping [FAIL] # TEST: Single path route delete [FAIL] # TEST: Multipath route add - v6 nexthop then v4 [FAIL] # TEST: Multipath route delete - nexthops in wrong order [ OK ] # TEST: Multipath route delete exact match [FAIL] # TEST: Multipath route add - v4 nexthop then v6 [FAIL] # TEST: Multipath route delete - nexthops in wrong order [ OK ] # TEST: Multipath route delete exact match [FAIL] # # Tests passed: 137 # Tests failed: 12 not ok 13 selftests: net: fib_tests.sh To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp run job.yaml Thanks, Rong Chen