This issue seems to be fixed with 5.19.0-40 this cycle (sru-20230320)
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https://bugs.launchpad.net/bugs/2000778
Title:
pmtu.sh in net from ubunut_kernel_selftests crash SUT with K-5.19
Status in ubuntu-kernel-tests:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Kinetic:
Incomplete
Bug description:
Issue found with Kinetic 5.19.0-27.28 and 5.19.0-28.29 in this cycle
(20221114) on these SUTs
* P9 baltar
* ARM64 kuzzle
* ARM64 howzit-kernel
This should not be considered as a regression as the net test cannot
be built in 5.19.0-24.25
Test log:
ubuntu@baltar:~/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net$
sudo ./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: ICMPv4 with DSCP and ECN: PMTU exceptions [ OK ]
TEST: ICMPv4 with DSCP and ECN: PMTU exceptions - nexthop objects [ OK ]
'socat' command not found; skipping tests
TEST: UDPv4 with DSCP and ECN: PMTU exceptions [SKIP]
TEST: IPv4 over vxlan4: PMTU exceptions [ OK ]
TEST: IPv4 over vxlan4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over vxlan4: PMTU exceptions [ OK ]
TEST: IPv6 over vxlan4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over vxlan6: PMTU exceptions [ OK ]
TEST: IPv4 over vxlan6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over vxlan6: PMTU exceptions [ OK ]
TEST: IPv6 over vxlan6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over geneve4: PMTU exceptions [ OK ]
TEST: IPv4 over geneve4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over geneve4: PMTU exceptions [ OK ]
TEST: IPv6 over geneve4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over geneve6: PMTU exceptions [ OK ]
TEST: IPv4 over geneve6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over geneve6: PMTU exceptions [ OK ]
TEST: IPv6 over geneve6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4, bridged vxlan4: PMTU exceptions [ OK ]
TEST: IPv4, bridged vxlan4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6, bridged vxlan4: PMTU exceptions [ OK ]
TEST: IPv6, bridged vxlan4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4, bridged vxlan6: PMTU exceptions [ OK ]
TEST: IPv4, bridged vxlan6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6, bridged vxlan6: PMTU exceptions [ OK ]
TEST: IPv6, bridged vxlan6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4, bridged geneve4: PMTU exceptions [ OK ]
TEST: IPv4, bridged geneve4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6, bridged geneve4: PMTU exceptions [ OK ]
TEST: IPv6, bridged geneve4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4, bridged geneve6: PMTU exceptions [ OK ]
TEST: IPv4, bridged geneve6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6, bridged geneve6: PMTU exceptions [ OK ]
TEST: IPv6, bridged geneve6: PMTU exceptions - nexthop objects [ OK ]
ovs_bridge not supported
TEST: IPv4, OVS vxlan4: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv6, OVS vxlan4: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv4, OVS vxlan6: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv6, OVS vxlan6: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv4, OVS geneve4: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv6, OVS geneve4: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv4, OVS geneve6: PMTU exceptions [SKIP]
ovs_bridge not supported
TEST: IPv6, OVS geneve6: PMTU exceptions [SKIP]
TEST: IPv4 over fou4: PMTU exceptions [ OK ]
TEST: IPv4 over fou4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over fou4: PMTU exceptions [ OK ]
TEST: IPv6 over fou4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over fou6: PMTU exceptions [ OK ]
TEST: IPv4 over fou6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over fou6: PMTU exceptions [ OK ]
TEST: IPv6 over fou6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over gue4: PMTU exceptions [ OK ]
TEST: IPv4 over gue4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over gue4: PMTU exceptions [ OK ]
TEST: IPv6 over gue4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over gue6: PMTU exceptions [ OK ]
TEST: IPv4 over gue6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over gue6: PMTU exceptions [ OK ]
TEST: IPv6 over gue6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over IPv4: PMTU exceptions [ OK ]
TEST: IPv4 over IPv4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over IPv4: PMTU exceptions [ OK ]
TEST: IPv6 over IPv4: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv4 over IPv6: PMTU exceptions [ OK ]
TEST: IPv4 over IPv6: PMTU exceptions - nexthop objects [ OK ]
TEST: IPv6 over IPv6: PMTU exceptions [ OK ]
TEST: IPv6 over IPv6: PMTU exceptions - nexthop objects [ OK ]
TEST: vti6: PMTU exceptions [ OK ]
TEST: vti4: PMTU exceptions [ OK ]
'nettest' command not found; skipping tests
xfrm6udp not supported
TEST: vti6: PMTU exceptions (ESP-in-UDP) [SKIP]
'nettest' command not found; skipping tests
xfrm4udp not supported
TEST: vti4: PMTU exceptions (ESP-in-UDP) [SKIP]
'nettest' command not found; skipping tests
xfrm6udprouted not supported
TEST: vti6: PMTU exceptions, routed (ESP-in-UDP) [SKIP]
'nettest' command not found; skipping tests
xfrm4udprouted not supported
TEST: vti4: PMTU exceptions, routed (ESP-in-UDP) [SKIP]
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 [FAIL]
can't delete veth device in a timely manner, PMTU dst likely leaked
(system disconnected here, and reboots)
dmesg output:
[ 481.010254] Kernel attempted to read user page (ffb6e0000) - exploit
attempt? (uid: 0)
[ 481.010281] BUG: Unable to handle kernel data access on read at 0xffb6e0000
[ 481.010299] Faulting instruction address: 0xc000000000b5d89c
[ 481.010309] Oops: Kernel access of bad area, sig: 11 [#1]
[ 481.010318] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
[ 481.010338] Modules linked in: dummy esp4 ip_vti esp6 xfrm_user xfrm_algo
ip6_vti xfrm6_tunnel fou6 ip6_tunnel tunnel6 sit ipip tunnel4 fou ip_tunnel
bridge stp llc geneve vxlan ip6_udp_tunnel udp_tunnel act_csum act_pedit
cls_flower sch_prio veth cfg80211 input_leds joydev mac_hid binfmt_misc
ipmi_powernv ofpart at24 cmdlinepart uio_pdrv_genirq ibmpowernv uio
powernv_flash ipmi_devintf opal_prd mtd ipmi_msghandler vmx_crypto ramoops
dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua pstore_blk pstore_zone
reed_solomon ip_tables x_tables autofs4 btrfs blake2b_generic raid10 raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq
libcrc32c raid1 raid0 multipath linear hid_generic ses enclosure
scsi_transport_sas usbhid hid ast i2c_algo_bit drm_vram_helper drm_ttm_helper
ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops
crct10dif_vpmsum crc32c_vpmsum drm i40e xhci_pci aacraid xhci_pci_renesas
drm_panel_orientation_quirks
[ 481.010578] CPU: 33 PID: 0 Comm: swapper/33 Not tainted 5.19.0-28-generic
#29-Ubuntu
[ 481.010599] NIP: c000000000b5d89c LR: c0000000011d4504 CTR:
c0000000011d4690
[ 481.010619] REGS: c000000fffe7ba80 TRAP: 0300 Not tainted
(5.19.0-28-generic)
[ 481.010639] MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 24002222
XER: 00000000
[ 481.010667] CFAR: c0000000011d4500 DAR: 0000000ffb6e0000 DSISR: 40000000
IRQMASK: 0
[ 481.010667] GPR00: c0000000011d4504 c000000fffe7bd20 c000000002afe000
c00000061fcf6b00
[ 481.010667] GPR04: ffffffffffffffff 0000000000000020 0000000000000000
0000000000000000
[ 481.010667] GPR08: 0000000000000000 0000000000000000 0000000ffb6e0000
0000000000002000
[ 481.010667] GPR12: c0000000011d4690 c000000ffffbbe80 c000000ffa317f90
0000000000000000
[ 481.010667] GPR16: 0000000000000001 c000000002b33a80 000000010000b0bd
c000000002187888
[ 481.010667] GPR20: 000000000000000a c000000002210800 0000000000000000
0000000000000000
[ 481.010667] GPR24: c0000000028f6080 c000000ffd8f1e78 000000000000000a
c000000ffd8f1e00
[ 481.010667] GPR28: 0000000000000001 c000000fffe7bdb0 0000000000000000
c00000061fcf6b00
[ 481.010843] NIP [c000000000b5d89c] percpu_counter_add_batch+0x2c/0x120
[ 481.010865] LR [c0000000011d4504] dst_destroy+0x184/0x1c0
[ 481.010885] Call Trace:
[ 481.010899] [c000000fffe7bd20] [c00000000f781980] 0xc00000000f781980
(unreliable)
[ 481.010921] [c000000fffe7bd60] [c0000000011d4504] dst_destroy+0x184/0x1c0
[ 481.010942] [c000000fffe7bd90] [c00000000027b2c8] rcu_do_batch+0x178/0x560
[ 481.010962] [c000000fffe7be30] [c000000000282e6c] rcu_core+0x15c/0x2a0
[ 481.010982] [c000000fffe7be80] [c0000000014e673c] __do_softirq+0x16c/0x47c
[ 481.011003] [c000000fffe7bf90] [c000000000017fec]
do_softirq_own_stack+0x4c/0xb0
[ 481.011025] [c00000000f8d3ab0] [c00000000218b0b8] tick_cpu_sched+0x0/0xe0
[ 481.011056] [c00000000f8d3af0] [c0000000001957d8] __irq_exit_rcu+0xd8/0x140
[ 481.011086] [c00000000f8d3b10] [c000000000196560] irq_exit+0x20/0x40
[ 481.011107] [c00000000f8d3b30] [c000000000029b28]
timer_interrupt+0x188/0x3a0
[ 481.011138] [c00000000f8d3b90] [c000000000017bb4]
replay_soft_interrupts+0x144/0x320
[ 481.011159] [c00000000f8d3d80] [c000000000017f44]
arch_local_irq_restore.part.0+0x1b4/0x1c0
[ 481.011190] [c00000000f8d3db0] [c0000000010f8280]
cpuidle_enter_state+0x120/0x770
[ 481.011222] [c00000000f8d3e30] [c0000000010f8984] cpuidle_enter+0x54/0x90
[ 481.011251] [c00000000f8d3e70] [c00000000021bf70]
cpuidle_idle_call+0x1f0/0x330
[ 481.011282] [c00000000f8d3ec0] [c00000000021c1b0] do_idle+0x100/0x200
[ 481.011313] [c00000000f8d3f10] [c00000000021c52c]
cpu_startup_entry+0x3c/0x50
[ 481.011343] [c00000000f8d3f40] [c00000000006ac2c]
start_secondary+0x2ac/0x340
[ 481.011374] [c00000000f8d3f90] [c00000000000d154]
start_secondary_prolog+0x10/0x14
[ 481.011395] Instruction dump:
[ 481.011411] 4bffff68 3c4c01fa 38420790 7c0802a6 fbe1fff8 fba1ffe8 fbc1fff0
7c7f1b78
[ 481.011436] f8010010 f821ffc1 e94d0030 e9230020 <7faa482e> 7fbe07b4
7fde2214 7fc9fe76
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