Public bug reported:
SRU cycle 2025.05.19 regression test results showed a kernel panic
caused by test ubuntu_fan_smoke_test:sut-scan for plucky:linux-gcp
6.14.0-1008.8
The failure was subsequently determined to affect the generic kernel as
well.
[ 1012.062312] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1012.069603] #PF: supervisor read access in kernel mode
[ 1012.074864] #PF: error_code(0x0000) - not-present page
[ 1012.080097] PGD 0 P4D 0
[ 1012.082728] Oops: Oops: 0000 [#1] SMP NOPTI
[ 1012.087010] CPU: 2 UID: 0 PID: 4687 Comm: ip Not tainted 6.14.0-1008-gcp
#8-Ubuntu
[ 1012.094688] Hardware name: Google Google Compute Engine/Google Compute
Engine, BIOS Google 05/29/2025
[ 1012.104000] RIP: 0010:vxlan_nl2conf+0xa5/0xff0 [vxlan]
[ 1012.109256] Code: 48 85 c0 0f 84 4c 06 00 00 8b 40 04 89 43 04 b8 02 00 00
00 66 89 03 49 83 bc 24 10 01 00 00 00 74 6d 49 8b 84 24 08 01 00 00 <0f> b7 38
8d 57 fc 0f b7 d2 83 fa 03 7e 57 49 81 c2 80 0a 00 00 48
[ 1012.128119] RSP: 0018:ffffa1f802c63380 EFLAGS: 00010286
[ 1012.133439] RAX: 0000000000000000 RBX: ffffa1f802c63418 RCX: 0000000000000000
[ 1012.140668] RDX: ffff95bcce0d2000 RSI: 0000000000000000 RDI: ffffa1f802c63490
[ 1012.147898] RBP: ffffa1f802c63400 R08: 0000000000000000 R09: ffffa1f802c63760
[ 1012.155128] R10: ffff95bcce0d2000 R11: 0000000000000000 R12: ffff95bd2f144a48
[ 1012.162356] R13: ffffa1f802c63760 R14: 00ffffff00000008 R15: 0000000000000000
[ 1012.169588] FS: 00007eb23310c840(0000) GS:ffff95cbbf700000(0000)
knlGS:0000000000000000
[ 1012.177777] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1012.183618] CR2: 0000000000000000 CR3: 000000015b6a3002 CR4: 0000000000370ef0
[ 1012.190850] Call Trace:
[ 1012.193393] <TASK>
[ 1012.195589] ? alloc_netdev_mqs+0x3bc/0x560
[ 1012.199869] ? __kvmalloc_node_noprof+0x5f/0x100
[ 1012.204584] vxlan_newlink+0x58/0xb0 [vxlan]
[ 1012.208971] ? vxlan_newlink+0x58/0xb0 [vxlan]
[ 1012.213515] rtnl_newlink_create+0x118/0x2a0
[ 1012.217884] __rtnl_newlink+0xc4/0x3f0
[ 1012.221730] rtnl_newlink+0x4df/0x960
[ 1012.225513] rtnetlink_rcv_msg+0x22f/0x440
[ 1012.229705] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.234590] ? update_io_ticks+0x79/0x80
[ 1012.238620] ? __pfx_rtnetlink_rcv_msg+0x10/0x10
[ 1012.243334] netlink_rcv_skb+0x55/0x100
[ 1012.247270] rtnetlink_rcv+0x15/0x30
[ 1012.250940] netlink_unicast+0x229/0x350
[ 1012.254957] netlink_sendmsg+0x214/0x460
[ 1012.258974] ____sys_sendmsg+0x3b4/0x3f0
[ 1012.262994] ___sys_sendmsg+0x9a/0xf0
[ 1012.266754] __sys_sendmsg+0x8d/0xf0
[ 1012.270426] __x64_sys_sendmsg+0x1d/0x30
[ 1012.274441] x64_sys_call+0x6f9/0x2310
[ 1012.278285] do_syscall_64+0x7e/0x170
[ 1012.282045] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.286929] ? filemap_map_pages+0x523/0x5d0
[ 1012.291293] ? __lruvec_stat_mod_folio+0x79/0xd0
[ 1012.296006] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.300891] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.305778] ? do_read_fault+0xee/0x1e0
[ 1012.309711] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.314596] ? do_fault+0x151/0x210
[ 1012.318180] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.323065] ? handle_pte_fault+0x97/0x1f0
[ 1012.327260] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.332406] ? __handle_mm_fault+0x3d2/0x7a0
[ 1012.336773] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.341657] ? rseq_get_rseq_cs+0x22/0x240
[ 1012.345853] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.350737] ? rseq_ip_fixup+0x8d/0x1a0
[ 1012.354683] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.359568] ? arch_exit_to_user_mode_prepare.isra.0+0xc8/0xd0
[ 1012.365495] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.370380] ? irqentry_exit_to_user_mode+0x2d/0x1d0
[ 1012.375441] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.380325] ? irqentry_exit+0x21/0x40
[ 1012.384171] ? srso_alias_return_thunk+0x5/0xfbef5
[ 1012.389055] ? exc_page_fault+0x96/0x1a0
[ 1012.393084] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 1012.398230] RIP: 0033:0x7eb23329f2a6
[ 1012.401906] Code: 00 00 48 8b 15 53 1b 17 00 64 89 02 48 c7 c2 ff ff ff ff
48 8b 5d f8 c9 48 89 d0 c3 0f 1f 84 00 00 00 00 00 48 8b 45 10 0f 05 <48> 63 d0
3d 00 f0 ff ff 77 10 48 8b 5d f8 48 89 d0 c9 c3 0f 1f 80
[ 1012.421218] RSP: 002b:00007ffe067eedb0 EFLAGS: 00000202 ORIG_RAX:
000000000000002e
[ 1012.428886] RAX: ffffffffffffffda RBX: 00007eb23310c840 RCX: 00007eb23329f2a6
[ 1012.436223] RDX: 0000000000000000 RSI: 00007ffe067eee40 RDI: 0000000000000003
[ 1012.443452] RBP: 00007ffe067eedc0 R08: 0000000000000000 R09: 0000000000000000
[ 1012.450680] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000048
[ 1012.457908] R13: 00005c51e00c1040 R14: 000000000000002c R15: 00007ffe067ef4c8
[ 1012.465141] </TASK>
[ 1012.467419] Modules linked in: vxlan ip6_udp_tunnel udp_tunnel xt_conntrack
nft_chain_nat xt_MASQUERADE nf_nat bridge xfrm_user xfrm_algo xt_addrtype
nft_compat nf_tables overlay binfmt_misc 8021q garp mrp stp llc nls_iso8859_1
input_leds sch_fq_codel nvme_fabrics efi_pstore dm_multipath vsock_loopback
vmw_vsock_virtio_transport_common vmw_vsock_vmci_transport vsock vmw_vmci
dmi_sysfs ip_tables x_tables autofs4 btrfs blake2b_generic raid10 raid456
async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq raid1
raid0 linear polyval_clmulni polyval_generic ghash_clmulni_intel psmouse
sha256_ssse3 sha1_ssse3 gve serio_raw virtio_rng aesni_intel crypto_simd cryptd
[ 1012.527936] CR2: 0000000000000000
[ 1012.531362] ---[ end trace 0000000000000000 ]---
[ 1012.556588] RIP: 0010:vxlan_nl2conf+0xa5/0xff0 [vxlan]
[ 1012.561837] Code: 48 85 c0 0f 84 4c 06 00 00 8b 40 04 89 43 04 b8 02 00 00
00 66 89 03 49 83 bc 24 10 01 00 00 00 74 6d 49 8b 84 24 08 01 00 00 <0f> b7 38
8d 57 fc 0f b7 d2 83 fa 03 7e 57 49 81 c2 80 0a 00 00 48
[ 1012.580702] RSP: 0018:ffffa1f802c63380 EFLAGS: 00010286
[ 1012.586044] RAX: 0000000000000000 RBX: ffffa1f802c63418 RCX: 0000000000000000
[ 1012.593273] RDX: ffff95bcce0d2000 RSI: 0000000000000000 RDI: ffffa1f802c63490
[ 1012.600501] RBP: ffffa1f802c63400 R08: 0000000000000000 R09: ffffa1f802c63760
[ 1012.607728] R10: ffff95bcce0d2000 R11: 0000000000000000 R12: ffff95bd2f144a48
[ 1012.614960] R13: ffffa1f802c63760 R14: 00ffffff00000008 R15: 0000000000000000
[ 1012.622190] FS: 00007eb23310c840(0000) GS:ffff95cbbf700000(0000)
knlGS:0000000000000000
[ 1012.630374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1012.636213] CR2: 0000000000000000 CR3: 000000015b6a3002 CR4: 0000000000370ef0
[ 1012.643445] Kernel panic - not syncing: Fatal exception
[ 1012.649071] Kernel Offset: 0x1d000000 from 0xffffffff81000000 (relocation
range: 0xffffffff80000000-0xffffffffbfffffff)
[ 1012.686314] Rebooting in 10 seconds..
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-gcp (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux (Ubuntu Plucky)
Importance: Undecided
Status: New
** Affects: linux-gcp (Ubuntu Plucky)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Plucky)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Invalid
** Also affects: linux-gcp (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-gcp (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/2113992
Title:
NULL pointer dereference caught by ubuntu_fan_smoke_test:sut-scan
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