WARNING in class_for_each_device

------------[ cut here ]------------
class_for_each_device called for class 'devlink' before it was registered
WARNING: drivers/base/class.c:416 at class_for_each_device+0x2d8/0x390 drivers/base/class.c:415, CPU#1: kworker/1:1/37
Modules linked in:
CPU: 1 UID: 0 PID: 37 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Workqueue: events deferred_probe_timeout_work_func
RIP: 0010:class_for_each_device+0x2fc/0x390 drivers/base/class.c:415
Code: 8d 1d 88 4c 0e 0a 4c 89 e8 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 ef e8 72 ef a5 fc 49 8b 55 00 48 89 df 48 c7 c6 10 4b 5d 8d <67> 48 0f b9 3a b8 ea ff ff ff eb 1b e8 63 6a 3b fc 49 81 c6 90 00
RSP: 0000:ffffc90000ac7a20 EFLAGS: 00010246
RAX: 1ffffffff1786614 RBX: ffffffff8f984710 RCX: ffff88801e2a1f00
RDX: ffffffff8bc34560 RSI: ffffffff8d5d4b10 RDI: ffffffff8f984710
RBP: ffffc90000ac7af8 R08: ffffc90000ac7a7f R09: 0000000000000000
R10: ffffc90000ac7a60 R11: fffff52000158f50 R12: ffffc90000ac7a60
R13: ffffffff8bc330a0 R14: 1ffff92000158f48 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125fdb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000000ddb8000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 fw_devlink_drivers_done+0x35/0x50 drivers/base/core.c:1837
 deferred_probe_timeout_work_func+0x21/0x220 drivers/base/dd.c:305
 process_one_work+0x98b/0x1630 kernel/workqueue.c:3318
 process_scheduled_works kernel/workqueue.c:3401 [inline]
 worker_thread+0xb49/0x1140 kernel/workqueue.c:3482
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	8d 1d 88 4c 0e 0a    	lea    0xa0e4c88(%rip),%ebx        # 0xa0e4c8e
   6:	4c 89 e8             	mov    %r13,%rax
   9:	48 c1 e8 03          	shr    $0x3,%rax
   d:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ef             	mov    %r13,%rdi
  17:	e8 72 ef a5 fc       	call   0xfca5ef8e
  1c:	49 8b 55 00          	mov    0x0(%r13),%rdx
  20:	48 89 df             	mov    %rbx,%rdi
  23:	48 c7 c6 10 4b 5d 8d 	mov    $0xffffffff8d5d4b10,%rsi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	b8 ea ff ff ff       	mov    $0xffffffea,%eax
  34:	eb 1b                	jmp    0x51
  36:	e8 63 6a 3b fc       	call   0xfc3b6a9e
  3b:	49                   	rex.WB
  3c:	81                   	.byte 0x81
  3d:	c6                   	(bad)
  3e:	90                   	nop


failed to run ["ssh" "-p" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "root@10.128.1.128" "pwd"]: exit status 255
ssh: connect to host 10.128.1.128 port 22: Connection timed out
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '[us-central1-ssh-serialport.googleapis.com]:9600' (ECDSA) to the list of known hosts.
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000200000000 = 8192 MiB
CPUs found: 2     Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID e758ef56-42d4-f37a-8983-cd929e7d1704
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f25d0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
[    0.000000][    T0] Linux version syzkaller (syzkaller@syzkaller) (Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8) #0 SMP PREEMPT_RT now
[    0.000000][    T0] Command line: BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[    0.000000][    T0] KERNEL supported cpus:
[    0.000000][    T0]   Intel GenuineIntel
[    0.000000][    T0]   AMD AuthenticAMD
[    0.000000][    T0] x86/CPU: Model not found in latest microcode list
[    0.000000][    T0] BIOS-provided physical RAM map:
[    0.000000][    T0] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff]  System RAM
[    0.000000][    T0] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff]  device reserved
[    0.000000][    T0] BIOS-e820: [gap 0x00000000000a0000-0x00000000000effff]
[    0.000000][    T0] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff]  device reserved
[    0.000000][    T0] BIOS-e820: [mem 0x0000000000100000-0x00000000bfffcfff]  System RAM
[    0.000000][    T0] BIOS-e820: [mem 0x00000000bfffd000-0x00000000bfffffff]  device reserved
[    0.000000][    T0] BIOS-e820: [gap 0x00000000c0000000-0x00000000fffbbfff]
[    0.000000][    T0] BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff]  device reserved
[    0.000000][    T0] BIOS-e820: [mem 0x0000000100000000-0x000000023fffffff]  System RAM
[    0.000000][    T0] printk: legacy bootconsole [earlyser0] enabled
[    0.000000][    T0] ERROR: earlyprintk= earlyser already used
[    0.000000][    T0] ERROR: earlyprintk= earlyser already used
[    0.000000][    T0] Hash pointers mode set to never.
[    0.000000][    T0] Malformed early option 'vsyscall'
[    0.000000][    T0] nopcid: PCID feature disabled
[    0.000000][    T0] NX (Execute Disable) protection: active
[    0.000000][    T0] APIC: Static calls initialized
[    0.000000][    T0] DMI: SMBIOS 2.4 present.
[    0.000000][    T0] DMI: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
[    0.000000][    T0] DMI: Memory slots populated: 1/1
[    0.000000][    T0] Hypervisor detected: KVM
[    0.000000][    T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[    0.000000][    T0] kvm-clock: Using msrs 4b564d01 and 4b564d00
[    0.000005][    T0] kvm-clock: using sched offset of 5606879041 cycles
[    0.000012][    T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.000033][    T0] tsc: Detected 2199.998 MHz processor
[    0.003817][    T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[    0.003863][    T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[    0.003874][    T0] x86/PAT: Configuration [0-7]: WB  WC  UC- UC  WB  WP  UC- WT  
[    0.003931][    T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[    0.008996][    T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[    0.009024][    T0] Using GB pages for direct mapping
[    0.012499][    T0] ACPI: Early table checksum verification disabled
[    0.012525][    T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[    0.012541][    T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[    0.012564][    T0] ACPI: FACP 0x00000000BFFFF370 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[    0.012587][    T0] ACPI: DSDT 0x00000000BFFFD900 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[    0.012605][    T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[    0.012619][    T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[    0.012633][    T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[    0.012650][    T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[    0.012668][    T0] ACPI: SSDT 0x00000000BFFFF470 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[    0.012685][    T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[    0.012700][    T0] ACPI: Reserving FACP table memory at [mem 0xbffff370-0xbffff463]
[    0.012707][    T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd900-0xbffff363]
[    0.012714][    T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[    0.012721][    T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[    0.012727][    T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[    0.012734][    T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[    0.012740][    T0] ACPI: Reserving SSDT table memory at [mem 0xbffff470-0xbffffdef]
[    0.012746][    T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[    0.012873][    T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[    0.012883][    T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[    0.012891][    T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[    0.012902][    T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[    0.012913][    T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[    0.012936][    T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[    0.012944][    T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[    0.013037][    T0] NODE_DATA(0) allocated [mem 0x13fffac80-0x140000fff]
[    0.013836][    T0] NODE_DATA(1) allocated [mem 0x23fff6c80-0x23fffcfff]
[    0.302923][    T0] KernelAddressSanitizer initialized (generic)
[    0.303734][    T0] ACPI: PM-Timer IO Port: 0xb008
[    0.303768][    T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[    0.303901][    T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[    0.303915][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[    0.303924][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.303931][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[    0.303939][    T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[    0.303958][    T0] ACPI: Using ACPI (MADT) for SMP configuration information
[    0.303968][    T0] CPU topo: Max. logical packages:   1
[    0.303972][    T0] CPU topo: Max. logical nodes:      1
[    0.303976][    T0] CPU topo: Num. nodes per package:  1
[    0.303989][    T0] CPU topo: Max. logical dies:       1
[    0.303993][    T0] CPU topo: Max. dies per package:   1
[    0.304004][    T0] CPU topo: Max. threads per core:   2
[    0.304008][    T0] CPU topo: Num. cores per package:     1
[    0.304012][    T0] CPU topo: Num. threads per package:   2
[    0.304016][    T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[    0.304122][    T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[    0.304131][    T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[    0.304140][    T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[    0.304162][    T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[    0.304168][    T0] Booting paravirtualized kernel on KVM
[    0.304179][    T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.436285][    T0] Zone ranges:
[    0.436295][    T0]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.436308][    T0]   DMA32    [mem 0x0000000001000000-0x00000000ffffffff]
[    0.436316][    T0]   Normal   [mem 0x0000000100000000-0x000000023fffffff]
[    0.436324][    T0]   Device   empty
[    0.436328][    T0] Movable zone start for each node
[    0.436332][    T0] Early memory node ranges
[    0.436335][    T0]   node   0: [mem 0x0000000000001000-0x000000000009efff]
[    0.436342][    T0]   node   0: [mem 0x0000000000100000-0x00000000bfffcfff]
[    0.436350][    T0]   node   0: [mem 0x0000000100000000-0x0000000140000fff]
[    0.436356][    T0]   node   1: [mem 0x0000000140001000-0x000000023fffffff]
[    0.436366][    T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[    0.436384][    T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[    0.436433][    T0] On node 0, zone DMA: 1 pages in unavailable ranges
[    0.436684][    T0] On node 0, zone DMA: 97 pages in unavailable ranges
[    0.500145][    T0] On node 0, zone Normal: 3 pages in unavailable ranges
[    0.564100][    T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[    0.564790][    T0] percpu: Embedded 71 pages/cpu s253768 r8192 d28856 u1048576
[    0.564958][    T0] kvm-guest: PV spinlocks enabled
[    0.564968][    T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[    0.564988][    T0] Kernel command line: earlyprintk=serial net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 ima_policy=tcb nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 nf-conntrack-sane.ports=20000 binder.debug_mask=0 rcupdate.rcu_expedited=1 rcupdate.rcu_cpu_stall_cputime=1 no_hash_pointers page_owner=on sysctl.vm.nr_hugepages=4 sysctl.vm.nr_overcommit_hugepages=4 secretmem.enable=1 sysctl.max_rcu_stall_to_panic=1 msr.allow_writes=off coredump_filter=0xffff root=/dev/sda console=ttyS0 vsyscall=native numa=fake=2 kvm-intel.nested=1 spec_store_bypass_disable=prctl nopcid vivid.n_devs=64 vivid.multiplanar=1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=32 rose.rose_ndevs=32 smp.csd_lock_timeout=100000 watchdog_thresh=55 workqueue.watchdog_thresh=140 sysctl.net.core.netdev_unregister_timeout_secs=140 dummy_hcd.num=32 max_loop=32 nbds_max=32 \
[    0.565015][    T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[    0.569563][    T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[    0.569653][    T0] random: crng init done
[    0.569657][    T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[    0.569867][    T0] software IO TLB: area num 2.
[    0.596079][    T0] Fallback order for Node 0: 0 1 
[    0.596100][    T0] Fallback order for Node 1: 1 0 
[    0.596113][    T0] Built 2 zonelists, mobility grouping on.  Total pages: 2097051
[    0.596121][    T0] Policy zone: Normal
[    0.596791][    T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[    0.596800][    T0] stackdepot: allocating hash table via alloc_large_system_hash
[    0.596810][    T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[    0.601027][    T0] stackdepot: allocating space for 8192 stack pools via memblock
[    1.300836][    T0] **********************************************************
[    1.300846][    T0] **   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
[    1.300850][    T0] **                                                      **
[    1.300854][    T0] ** This system shows unhashed kernel memory addresses   **
[    1.300857][    T0] ** via the console, logs, and other interfaces. This    **
[    1.300861][    T0] ** might reduce the security of your system.            **
[    1.300864][    T0] **                                                      **
[    1.300868][    T0] ** If you see this message and you are not debugging    **
[    1.300872][    T0] ** the kernel, report this immediately to your system   **
[    1.300875][    T0] ** administrator!                                       **
[    1.300879][    T0] **                                                      **
[    1.300882][    T0] ** Use hash_pointers=always to force this mode off      **
[    1.300886][    T0] **                                                      **
[    1.300889][    T0] **   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **
[    1.300893][    T0] **********************************************************
[    1.304311][    T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[    1.431458][    T0] allocated 167772160 bytes of page_ext
[    1.431499][    T0] Node 0, zone      DMA: page owner found early allocated 0 pages
[    1.444885][    T0] Node 0, zone    DMA32: page owner found early allocated 21120 pages
[    1.448989][    T0] Node 0, zone   Normal: page owner found early allocated 131 pages
[    1.459924][    T0] Node 1, zone   Normal: page owner found early allocated 19848 pages
[    1.460409][    T0] Kernel/User page tables isolation: enabled
[    1.462562][    T0] Dynamic Preempt: full
[    1.463704][    T0] Running RCU self tests
[    1.463709][    T0] Running RCU synchronous self tests
[    1.463714][    T0] rcu: Preemptible hierarchical RCU implementation.
[    1.463718][    T0] rcu: 	RCU lockdep checking is enabled.
[    1.463721][    T0] rcu: 	RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[    1.463727][    T0] rcu: 	RCU priority boosting: priority 1 delay 500 ms.
[    1.463733][    T0] rcu: 	RCU callback double-/use-after-free debug is enabled.
[    1.463737][    T0] rcu: 	RCU_SOFTIRQ processing moved to rcuc kthreads.
[    1.463741][    T0] rcu: 	RCU debug extended QS entry/exit.
[    1.463744][    T0] 	No expedited grace period (rcu_normal_after_boot).
[    1.463747][    T0] 	Trampoline variant of Tasks RCU enabled.
[    1.463751][    T0] 	Tracing variant of Tasks RCU enabled.
[    1.463754][    T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    1.463759][    T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    1.463929][    T0] Running RCU synchronous self tests
[    1.463963][    T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[    1.630958][    T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[    1.632173][    T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[    1.632932][    T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[    1.634936][    T0] Console: colour VGA+ 80x25
[    2.057454][    T0] printk: legacy console [ttyS0] enabled
[    2.057465][    T0] printk: legacy bootconsole [earlyser0] disabled
[    2.057542][    T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[    2.057547][    T0] ... MAX_LOCKDEP_SUBCLASSES:  8
[    2.057551][    T0] ... MAX_LOCK_DEPTH:          48
[    2.057556][    T0] ... MAX_LOCKDEP_KEYS:        8192
[    2.057560][    T0] ... CLASSHASH_SIZE:          4096
[    2.057564][    T0] ... MAX_LOCKDEP_ENTRIES:     1048576
[    2.057568][    T0] ... MAX_LOCKDEP_CHAINS:      1048576
[    2.057572][    T0] ... CHAINHASH_SIZE:          524288
[    2.057576][    T0]  memory used by lock dependency info: 106625 kB
[    2.057580][    T0]  memory used for stack traces: 8320 kB
[    2.057585][    T0]  per task-struct memory footprint: 1920 bytes
[    2.057903][    T0] ACPI: Core revision 20251212
[    2.059399][    T0] APIC: Switch to symmetric I/O mode setup
[    2.060157][    T0] x2apic enabled
[    2.066363][    T0] APIC: Switched APIC routing to: physical x2apic
[    2.076199][    T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[    2.076564][    T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[    2.076613][    T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[    2.077315][    T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[    2.077321][    T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[    2.077381][    T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[    2.077399][    T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[    2.077406][    T0] Spectre V2 : Mitigation: IBRS
[    2.077410][    T0] RETBleed: Mitigation: IBRS
[    2.077413][    T0] ITS: Mitigation: Aligned branch/return thunks
[    2.077417][    T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[    2.077422][    T0] MDS: Mitigation: Clear CPU buffers
[    2.077426][    T0] TAA: Mitigation: Clear CPU buffers
[    2.077429][    T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[    2.077434][    T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[    2.077442][    T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[    2.077463][    T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[    2.077518][    T0] active return thunk: its_rserialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-parallel-2 port 1 (session ID: 9b120e3cbb1960217b54c45b368979d445ecee2cf73b6374ac10bb9e01a6210e, active connections: 1).
eturn_thunk
[    2.077542][    T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[    2.077609][    T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[    2.077618][    T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[    2.077626][    T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[    2.077635][    T0] x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
[    2.077646][    T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[    2.487809][    T0] pid_max: default: 32768 minimum: 301
[    2.489947][    T0] landlock: Up and running.
[    2.489956][    T0] Yama: becoming mindful.
[    2.490493][    T0] TOMOYO Linux initialized
[    2.492058][    T0] AppArmor: AppArmor initialized
[    2.495437][    T0] LSM support for eBPF active
[    2.503359][    T0] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage)
[    2.507068][    T0] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc hugepage)
[    2.507574][    T0] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
[    2.507802][    T0] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
[    2.511287][    T0] VFS: Finished mounting rootfs on nullfs
[    2.517956][    T0] Running RCU synchronous self tests
[    2.517970][    T0] Running RCU synchronous self tests
[    2.639664][    T1] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0)
[    2.645554][    T1] Performance Events: unsupported CPU family 6 model 79 no PMU driver, software events only.
[    2.645721][    T1] signal: max sigframe size: 1776
[    2.656712][    T1] rcu: Hierarchical SRCU implementation.
[    2.656722][    T1] rcu: 	Max phase no-delay instances is 1000.
[    2.696738][    T1] Timer migration: 1 hierarchy levels; 8 children per group; 0 crossnode level
[    2.898093][    T1] NMI watchdog: Perf NMI watchdog permanently disabled
[    2.909012][    T1] smp: Bringing up secondary CPUs ...
[    2.913959][    T1] smpboot: x86: Booting SMP configuration:
[    2.913969][    T1] .... node  #0, CPUs:      #1
[    2.923617][    T1] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
[    2.923637][    T1] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
[    2.923651][    T1] MMIO Stale Data CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/processor_mmio_stale_data.html for more details.
[    2.923780][    T1] smp: Brought up 2 nodes, 2 CPUs
[    2.923796][    T1] smpboot: Total of 2 processors activated (8799.99 BogoMIPS)
[    2.924153][    T1] Memory: 6466344K/8388204K available (167056K kernel code, 29615K rwdata, 39744K rodata, 25464K init, 129272K bss, 1733728K reserved, 0K cma-reserved)
[    2.948585][    T1] devtmpfs: initialized
[    2.958575][    T1] x86/mm: Memory block size: 128MB
[    3.052465][    T1] Running RCU synchronous self tests
[    3.052465][    T1] Running RCU synchronous self tests
[    3.056965][    T1] Running RCU Tasks wait API self tests
[    3.056965][    T1] Running RCU Tasks Trace wait API self tests
[    3.072576][    T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    3.072576][    T1] posixtimers hash table entries: 1024 (order: 6, 139264 bytes, vmalloc)
[    3.072576][    T1] futex hash table entries: 256 (49152 bytes on 2 NUMA nodes, total 96 KiB, linear).
[    3.077347][   T37] ------------[ cut here ]------------
[    3.077358][   T37] class_for_each_device called for class 'devlink' before it was registered
[    3.077367][   T37] WARNING: drivers/base/class.c:416 at class_for_each_device+0x2d8/0x390, CPU#1: kworker/1:1/37
[    3.077405][   T37] Modules linked in:
[    3.077420][   T37] CPU: 1 UID: 0 PID: 37 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
[    3.077438][   T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
[    3.077449][   T37] Workqueue: events deferred_probe_timeout_work_func
[    3.077470][   T37] RIP: 0010:class_for_each_device+0x2fc/0x390
[    3.077493][   T37] Code: 8d 1d 88 4c 0e 0a 4c 89 e8 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 ef e8 72 ef a5 fc 49 8b 55 00 48 89 df 48 c7 c6 10 4b 5d 8d <67> 48 0f b9 3a b8 ea ff ff ff eb 1b e8 63 6a 3b fc 49 81 c6 90 00
[    3.077506][   T37] RSP: 0000:ffffc90000ac7a20 EFLAGS: 00010246
[    3.077519][   T37] RAX: 1ffffffff1786614 RBX: ffffffff8f984710 RCX: ffff88801e2a1f00
[    3.077531][   T37] RDX: ffffffff8bc34560 RSI: ffffffff8d5d4b10 RDI: ffffffff8f984710
[    3.077543][   T37] RBP: ffffc90000ac7af8 R08: ffffc90000ac7a7f R09: 0000000000000000
[    3.077554][   T37] R10: ffffc90000ac7a60 R11: fffff52000158f50 R12: ffffc90000ac7a60
[    3.077566][   T37] R13: ffffffff8bc330a0 R14: 1ffff92000158f48 R15: dffffc0000000000
[    3.077579][   T37] FS:  0000000000000000(0000) GS:ffff888125fdb000(0000) knlGS:0000000000000000
[    3.077592][   T37] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    3.077603][   T37] CR2: 0000000000000000 CR3: 000000000ddb8000 CR4: 00000000003506f0
[    3.077616][   T37] Call Trace:
[    3.077622][   T37]  <TASK>
[    3.077630][   T37]  ? __pfx_fw_devlink_no_driver+0x10/0x10
[    3.077656][   T37]  ? __pfx_class_for_each_device+0x10/0x10
[    3.077688][   T37]  ? lockdep_hardirqs_on+0x7a/0x110
[    3.077708][   T37]  ? _raw_spin_unlock_irqrestore+0x4c/0x80
[    3.077729][   T37]  ? mutex_lock_nested+0x152/0x1d0
[    3.077753][   T37]  ? fw_devlink_drivers_done+0x1e/0x50
[    3.077779][   T37]  ? process_one_work+0x8be/0x1630
[    3.077804][   T37]  fw_devlink_drivers_done+0x35/0x50
[    3.077828][   T37]  deferred_probe_timeout_work_func+0x21/0x220
[    3.077849][   T37]  ? process_one_work+0x8be/0x1630
[    3.077872][   T37]  process_one_work+0x98b/0x1630
[    3.077913][   T37]  ? __pfx_process_one_work+0x10/0x10
[    3.077964][   T37]  ? do_raw_spin_lock+0x12b/0x2f0
[    3.078005][   T37]  worker_thread+0xb49/0x1140
[    3.086657][   T37]  ? _raw_spin_unlock_irqrestore+0x30/0x80
[    3.086657][   T37]  kthread+0x388/0x470
[    3.086657][   T37]  ? __pfx_worker_thread+0x10/0x10
[    3.086657][   T37]  ? __pfx_kthread+0x10/0x10
[    3.086657][   T37]  ret_from_fork+0x514/0xb70
[    3.086657][   T37]  ? __pfx_ret_from_fork+0x10/0x10
[    3.086657][   T37]  ? __switch_to+0xc79/0x1410
[    3.086657][   T37]  ? __pfx_kthread+0x10/0x10
[    3.086657][   T37]  ret_from_fork_asm+0x1a/0x30
[    3.086657][   T37]  </TASK>
[    3.086657][   T37] Kernel panic - not syncing: kernel: panic_on_warn set ...
[    3.086657][   T37] CPU: 1 UID: 0 PID: 37 Comm: kworker/1:1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
[    3.086657][   T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
[    3.086657][   T37] Workqueue: events deferred_probe_timeout_work_func
[    3.086657][   T37] Call Trace:
[    3.086657][   T37]  <TASK>
[    3.086657][   T37]  vpanic+0x56c/0xa60
[    3.086657][   T37]  ? __pfx__printk+0x10/0x10
[    3.086657][   T37]  ? __pfx_vpanic+0x10/0x10
[    3.086657][   T37]  ? is_bpf_text_address+0x292/0x2b0
[    3.086657][   T37]  ? is_bpf_text_address+0x26/0x2b0
[    3.086657][   T37]  panic+0xc5/0xd0
[    3.086657][   T37]  ? __pfx_panic+0x10/0x10
[    3.086657][   T37]  ? ret_from_fork_asm+0x1a/0x30
[    3.086657][   T37]  __warn+0x315/0x4c0
[    3.086657][   T37]  ? class_for_each_device+0x2d8/0x390
[    3.086657][   T37]  ? class_for_each_device+0x2d8/0x390
[    3.086657][   T37]  __report_bug+0x339/0x540
[    3.086657][   T37]  ? class_for_each_device+0x2d8/0x390
[    3.086657][   T37]  ? __pfx___report_bug+0x10/0x10
[    3.086657][   T37]  report_bug_entry+0x19a/0x290
[    3.086657][   T37]  ? class_for_each_device+0x2fc/0x390
[    3.086657][   T37]  ? class_for_each_device+0x301/0x390
[    3.086657][   T37]  handle_bug+0xce/0x200
[    3.086657][   T37]  exc_invalid_op+0x1a/0x50
[    3.086657][   T37]  asm_exc_invalid_op+0x1a/0x20
[    3.086657][   T37] RIP: 0010:class_for_each_device+0x2fc/0x390
[    3.086657][   T37] Code: 8d 1d 88 4c 0e 0a 4c 89 e8 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 ef e8 72 ef a5 fc 49 8b 55 00 48 89 df 48 c7 c6 10 4b 5d 8d <67> 48 0f b9 3a b8 ea ff ff ff eb 1b e8 63 6a 3b fc 49 81 c6 90 00
[    3.086657][   T37] RSP: 0000:ffffc90000ac7a20 EFLAGS: 00010246
[    3.086657][   T37] RAX: 1ffffffff1786614 RBX: ffffffff8f984710 RCX: ffff88801e2a1f00
[    3.086657][   T37] RDX: ffffffff8bc34560 RSI: ffffffff8d5d4b10 RDI: ffffffff8f984710
[    3.086657][   T37] RBP: ffffc90000ac7af8 R08: ffffc90000ac7a7f R09: 0000000000000000
[    3.086657][   T37] R10: ffffc90000ac7a60 R11: fffff52000158f50 R12: ffffc90000ac7a60
[    3.086657][   T37] R13: ffffffff8bc330a0 R14: 1ffff92000158f48 R15: dffffc0000000000
[    3.086657][   T37]  ? __pfx_fw_devlink_no_driver+0x10/0x10
[    3.086657][   T37]  ? __pfx_class_for_each_device+0x10/0x10
[    3.086657][   T37]  ? lockdep_hardirqs_on+0x7a/0x110
[    3.086657][   T37]  ? _raw_spin_unlock_irqrestore+0x4c/0x80
[    3.086657][   T37]  ? mutex_lock_nested+0x152/0x1d0
[    3.086657][   T37]  ? fw_devlink_drivers_done+0x1e/0x50
[    3.086657][   T37]  ? process_one_work+0x8be/0x1630
[    3.086657][   T37]  fw_devlink_drivers_done+0x35/0x50
[    3.086657][   T37]  deferred_probe_timeout_work_func+0x21/0x220
[    3.086657][   T37]  ? process_one_work+0x8be/0x1630
[    3.086657][   T37]  process_one_work+0x98b/0x1630
[    3.086657][   T37]  ? __pfx_process_one_work+0x10/0x10
[    3.086657][   T37]  ? do_raw_spin_lock+0x12b/0x2f0
[    3.086657][   T37]  worker_thread+0xb49/0x1140
[    3.086657][   T37]  ? _raw_spin_unlock_irqrestore+0x30/0x80
[    3.086657][   T37]  kthread+0x388/0x470
[    3.086657][   T37]  ? __pfx_worker_thread+0x10/0x10
[    3.086657][   T37]  ? __pfx_kthread+0x10/0x10
[    3.086657][   T37]  ret_from_fork+0x514/0xb70
[    3.086657][   T37]  ? __pfx_ret_from_fork+0x10/0x10
[    3.086657][   T37]  ? __switch_to+0xc79/0x1410
[    3.086657][   T37]  ? __pfx_kthread+0x10/0x10
[    3.086657][   T37]  ret_from_fork_asm+0x1a/0x30
[    3.086657][   T37]  </TASK>


syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build569403053=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'

git status (err=<nil>)
HEAD detached at d3ccff6372e
nothing to commit, working tree clean


tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=d3ccff6372e07c6aabd02b5da419aa6492b5f0ad -X 'github.com/google/syzkaller/prog.gitRevisionDate=20241226-091248'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
	-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
	-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d3ccff6372e07c6aabd02b5da419aa6492b5f0ad\"
/usr/bin/ld: /tmp/ccZe8MWl.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking