This bug was fixed in the package linux - 6.16.0-13.13
---------------
linux (6.16.0-13.13) questing; urgency=medium
* questing/linux: 6.16.0-13.13 -proposed tracker (LP: #2119951)
* Miscellaneous Ubuntu changes
- [Packaging] debian.master/dkms-versions -- remove ipu6 since it's
upstream
-- Paolo Pisati <[email protected]> Thu, 07 Aug 2025 16:32:32
+0200
** Changed in: linux (Ubuntu)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/2113992
Title:
Creating a VXLAN interface with a Fan mapping causes a NULL pointer
dereference caught by ubuntu_fan_smoke_test:sut-scan
Status in linux package in Ubuntu:
Fix Released
Status in linux-gcp package in Ubuntu:
Invalid
Status in linux-hwe-6.14 package in Ubuntu:
New
Status in linux source package in Noble:
Invalid
Status in linux-gcp source package in Noble:
Invalid
Status in linux-hwe-6.14 source package in Noble:
Fix Released
Status in linux source package in Plucky:
Fix Committed
Status in linux-gcp source package in Plucky:
New
Status in linux-hwe-6.14 source package in Plucky:
Invalid
Bug description:
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..
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