The selftests: net: pmtu.sh running on Linux next got this kernel panic on qemu-arm64.

logs: ==== [ 0.000000] Linux version 6.5.0 (tuxmake@tuxmake) (Debian clang version 18.0.0 (++20230822112105+841c4dc7e51e-1~exp1~20230822112223.851), Debian LLD 18.0.0) #1 SMP PREEMPT @1693176139

... # selftests: net: pmtu.sh # TEST: ipv4: PMTU exceptions [ OK ] # TEST: ipv4: PMTU exceptions - nexthop objects [ OK ] # TEST: ipv6: PMTU exceptions [ OK ] # TEST: ipv6: PMTU exceptions - nexthop objects [ OK ]

...

# TEST: vti4: PMTU exceptions, routed (ESP-in-UDP) [FAIL] # PMTU exception wasn't created after exceeding PMTU (IP payload length 1438) # ./pmtu.sh: 938: kill: No such process # # ./pmtu.sh: 938: kill: No such process # <47>[ 366.411270] systemd-journald[84]: Sent WATCHDOG=1 notification. # TEST: vti4: default MTU assignment [ OK ] # TEST: vti6: default MTU assignment [ OK ] # TEST: vti4: MTU setting on link creation [ OK ] # TEST: vti6: MTU setting on link creation [ OK ] # TEST: vti6: MTU changes on link changes [ OK ] # TEST: ipv4: cleanup of cached exceptions [ OK ] # TEST: ipv4: cleanup of cached exceptions - nexthop objects [ OK ] # TEST: ipv6: cleanup of cached exceptions [ OK ] # TEST: ipv6: cleanup of cached exceptions - nexthop objects [ OK ] <1>[ 398.987591] Unable to handle kernel paging request at virtual address ffff5dbb8189f000 <1>[ 398.988469] Mem abort info: <1>[ 398.988712] ESR = 0x0000000097b58004 <1>[ 398.989264] EC = 0x25: DABT (current EL), IL = 32 bits <1>[ 398.989893] SET = 0, FnV = 0 <1>[ 398.990312] EA = 0, S1PTW = 0 <1>[ 398.990768] FSC = 0x04: level 0 translation fault <1>[ 398.992330] Data abort info: <1>[ 398.992591] Access size = 4 byte(s) <1>[ 398.992811] SSE = 1, SRT = 21 <1>[ 398.993008] SF = 1, AR = 0 <1>[ 398.993243] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 <1>[ 398.993601] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 <1>[ 398.994094] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041d49000 <1>[ 398.994603] [ffff5dbb8189f000] pgd=0000000000000000, p4d=0000000000000000 <0>[ 398.995464] Internal error: Oops: 0000000097b58004 [#1] PREEMPT SMP <4>[ 398.996177] Modules linked in: fou6 sit fou bridge stp llc vxlan ip6_udp_tunnel udp_tunnel act_csum libcrc32c act_pedit cls_flower sch_prio veth vrf macvtap macvlan tap crct10dif_ce sm3_ce sm3 sha3_ce sha512_ce sha512_arm64 fuse drm dm_mod ip_tables x_tables [last unloaded: test_blackhole_dev] <4>[ 398.999384] CPU: 1 PID: 132 Comm: kworker/u4:3 Not tainted 6.5.0 #1 <4>[ 399.000045] Hardware name: linux,dummy-virt (DT) <4>[ 399.001079] Workqueue: netns cleanup_net <4>[ 399.002441] pstate: 824000c9 (Nzcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) <4>[ 399.003881] pc : percpu_counter_add_batch+0x28/0xd0 <4>[ 399.004637] lr : dst_destroy+0x44/0x1e4 <4>[ 399.004904] sp : ffff80008000be70 <4>[ 399.005864] x29: ffff80008000be70 x28: ffffa2457df6ea40 x27: ffffa2457df24008 <4>[ 399.006586] x26: ffffa2457dffa000 x25: 000000000000000a x24: 0000000000000002 <4>[ 399.007360] x23: 0000000000000000 x22: 000000000000000a x21: ffff0000c0e90ec0 <4>[ 399.008276] x20: 0000000000000000 x19: ffff0000c4f83440 x18: 0000000000000000 <4>[ 399.009327] x17: ffff5dbb8189f000 x16: ffff800080008000 x15: 0000000000000010 <4>[ 399.009653] x14: 0000000000000010 x13: 0000000000000004 x12: 0000000000000701 <4>[ 399.010159] x11: 0000000000000001 x10: fffffc00030c7260 x9 : ffff5dbb8189f000 <4>[ 399.010742] x8 : 0000000000000000 x7 : 7f7f7f7f7f7f7f7f x6 : fefefefefefefeff <4>[ 399.012056] x5 : 000000000010000e x4 : fffffc00030c7260 x3 : 000000000010000e <4>[ 399.013082] x2 : 0000000000000020 x1 : ffffffffffffffff x0 : ffff0000c4f83440 <4>[ 399.014716] Call trace: <4>[ 399.015702] percpu_counter_add_batch+0x28/0xd0 <4>[ 399.016399] dst_destroy+0x44/0x1e4 <4>[ 399.016681] dst_destroy_rcu+0x14/0x20 <4>[ 399.017009] rcu_core+0x2d0/0x5e0 <4>[ 399.017311] rcu_core_si+0x10/0x1c <4>[ 399.017609] __do_softirq+0xd4/0x23c <4>[ 399.017991] ____do_softirq+0x10/0x1c <4>[ 399.018320] call_on_irq_stack+0x24/0x4c <4>[ 399.018723] do_softirq_own_stack+0x1c/0x28 <4>[ 399.022639] __irq_exit_rcu+0x6c/0xcc <4>[ 399.023434] irq_exit_rcu+0x10/0x1c <4>[ 399.023962] el1_interrupt+0x8c/0xc0 <4>[ 399.024810] el1h_64_irq_handler+0x18/0x24 <4>[ 399.025324] el1h_64_irq+0x64/0x68 <4>[ 399.025612] _raw_spin_lock_bh+0x0/0x6c <4>[ 399.026102] cleanup_net+0x280/0x45c <4>[ 399.026403] process_one_work+0x1d4/0x310 <4>[ 399.027140] worker_thread+0x248/0x470 <4>[ 399.027621] kthread+0xfc/0x184 <4>[ 399.028068] ret_from_fork+0x10/0x20 <0>[ 399.029333] Code: d50343df aa0003f3 f9401008 d53cd049 (b8a86935) <4>[ 399.030578] ---[ end trace 0000000000000000 ]--- <0>[ 399.031422] Kernel panic - not syncing: Oops: Fatal exception in interrupt <2>[ 399.032320] SMP: stopping secondary CPUs <0>[ 399.033487] Kernel Offset: 0x2244fc200000 from 0xffff800080000000 <0>[ 399.033819] PHYS_OFFSET: 0x40000000 <0>[ 399.034096] CPU features: 0x00000000,68f167a1,ccc6773f <0>[ 399.034779] Memory Limit: none <0>[ 399.035768] ---[ end Kernel panic - not syncing: Oops: Fatal exception in interrupt ]---

Links: - https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.5/testrun/... - https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.5/testrun/... - https://storage.tuxsuite.com/public/linaro/lkft/builds/2UaRggcJ0lNsDMIbbFaiy...

Steps to reproduce: =================== # # To install tuxrun to your home directory at ~/.local/bin: # pip3 install -U --user tuxrun==0.48.0 # # Or install a deb/rpm depending on the running distribution # See https://tuxmake.org/install-deb/ or # https://tuxmake.org/install-rpm/ # # See https://tuxrun.org/ for complete documentation. # # Please follow the additional instructions if the tests are related to FVP: # https://tuxrun.org/run-fvp/ #

tuxrun --runtime podman --device qemu-arm64 --boot-args rw --kernel https://storage.tuxsuite.com/public/linaro/lkft/builds/2UaRggcJ0lNsDMIbbFaiy... --modules https://storage.tuxsuite.com/public/linaro/lkft/builds/2UaRggcJ0lNsDMIbbFaiy... --rootfs https://storage.tuxboot.com/debian/bookworm/arm64/rootfs.ext4.xz --parameters SHARD_INDEX=1 --parameters SKIPFILE=skipfile-lkft.yaml --parameters SHARD_NUMBER=5 --parameters KSELFTEST=https://storage.tuxsuite.com/public/linaro/lkft/builds/2UaRggcJ0lNsDMIbbFaiy... --image docker.io/linaro/tuxrun-dispatcher:v0.48.0 --tests kselftest-net --timeouts boot=30 kselftest-net=30

-- Linaro LKFT https://lkft.linaro.org