15-Sep-2026 16:57:58: building syzkaller on 356bdfc961dd4d1eeb96ca7d9071058dc92d2dde...
15-Sep-2026 18:12:28: fetching kernel...
15-Sep-2026 18:12:35: checked out kernel commit e6e35979777d646fe3c7c94dca7dd32fb25d45f4 ("Add linux-next specific files for 20260915", 2026-09-15 18:30:01 +0100 +0100)
15-Sep-2026 18:12:35: cleaning kernel...
15-Sep-2026 20:03:20: building kernel...
16-Sep-2026 00:19:51: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
16-Sep-2026 00:19:51: testing patch...
16-Sep-2026 00:30:34: aggregating test results failed: WARNING in __change_page_attr_set_clr
clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
Console: colour VGA+ 80x25
printk: console [ttyS0] enabled
printk: console [ttyS0] enabled
printk: legacy bootconsole [earlyser0] disabled
printk: legacy bootconsole [earlyser0] disabled
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES: 8
... MAX_LOCK_DEPTH: 48
... MAX_LOCKDEP_KEYS: 8192
... CLASSHASH_SIZE: 4096
... MAX_LOCKDEP_ENTRIES: 1048576
... MAX_LOCKDEP_CHAINS: 1048576
... CHAINHASH_SIZE: 524288
memory used by lock dependency info: 106625 kB
memory used for stack traces: 8320 kB
per task-struct memory footprint: 1920 bytes
mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
ACPI: Core revision 20260408
APIC: Switch to symmetric I/O mode setup
x2apic enabled
APIC: Switched APIC routing to: physical x2apic
..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
Spectre V2 : Mitigation: IBRS
RETBleed: Mitigation: IBRS
ITS: Mitigation: Aligned branch/return thunks
Spectre V2 : User space: Mitigation: STIBP via prctl
MDS: Mitigation: Clear CPU buffers
TAA: Mitigation: Clear CPU buffers
MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
Spectre V2 : Enabling IBPB for BPF
Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
active return thunk: its_return_thunk
Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
------------[ cut here ]------------
CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 1b200
WARNING: arch/x86/mm/pat/set_memory.c:725 at verify_rwx arch/x86/mm/pat/set_memory.c:722 [inline], CPU#0: swapper/0/0
WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr arch/x86/mm/pat/set_memory.c:1892 [inline], CPU#0: swapper/0/0
WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820 arch/x86/mm/pat/set_memory.c:2064, CPU#0: swapper/0/0
Modules linked in:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026
RIP: 0010:verify_rwx arch/x86/mm/pat/set_memory.c:722 [inline]
RIP: 0010:__change_page_attr arch/x86/mm/pat/set_memory.c:1892 [inline]
RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820 arch/x86/mm/pat/set_memory.c:2064
Code: 00 00 e8 9a f5 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 97 03 03 0f 48 8b b4 24 a0 00 00 00 4c 89 f2 4c 8b 4c 24 50 <67> 48 0f b9 3a e9 8d 00 00 00 e8 68 f5 4d 00 4c 89 f8 48 c1 e8 03
RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
RAX: ffffffff817aa2e6 RBX: 800000001b200023 RCX: ffffffffa0000000
RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907da690
RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200
R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
FS: 0000000000000000(0000) GS:ffff888124c9a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0
Call Trace:
change_page_attr_set_clr+0x398/0x11d0 arch/x86/mm/pat/set_memory.c:2152
change_page_attr_clear arch/x86/mm/pat/set_memory.c:2190 [inline]
set_memory_x+0xd6/0x110 arch/x86/mm/pat/set_memory.c:2351
its_alloc arch/x86/kernel/alternative.c:236 [inline]
its_allocate_thunk arch/x86/kernel/alternative.c:258 [inline]
emit_its_trampoline arch/x86/kernel/alternative.c:834 [inline]
patch_retpoline arch/x86/kernel/alternative.c:945 [inline]
apply_retpolines+0x8e9/0x15a0 arch/x86/kernel/alternative.c:1010
alternative_instructions+0x3a/0x100 arch/x86/kernel/alternative.c:2287
arch_cpu_finalize_init+0xb2/0x1f0 arch/x86/kernel/cpu/common.c:2645
start_kernel+0x315/0x3e0 init/main.c:1160
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: e8 9a f5 4d 00 call 0x4df5a1
7: 48 8b 4c 24 30 mov 0x30(%rsp),%rcx
c: 4c 8d 81 ff 0f 00 00 lea 0xfff(%rcx),%r8
13: 48 8d 3d 97 03 03 0f lea 0xf030397(%rip),%rdi # 0xf0303b1
1a: 48 8b b4 24 a0 00 00 mov 0xa0(%rsp),%rsi
21: 00
22: 4c 89 f2 mov %r14,%rdx
25: 4c 8b 4c 24 50 mov 0x50(%rsp),%r9
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: e9 8d 00 00 00 jmp 0xc1
34: e8 68 f5 4d 00 call 0x4df5a1
39: 4c 89 f8 mov %r15,%rax
3c: 48 c1 e8 03 shr $0x3,%rax
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@10.128.1.190" "pwd"]: exit status 255
ssh: connect to host 10.128.1.190 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 bc75221c-bda7-2114-023c-35d84fbe4d56
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 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8) #0 SMP PREEMPT_DYNAMIC 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 09/08/2026
[ 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
[ 0.000007][ T0] kvm-clock: using sched offset of 13533827699 cycles
[ 0.003551][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.014218][ T0] tsc: Detected 2199.998 MHz processor
[ 0.021424][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.023747][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.028163][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.031634][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.039893][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.043411][ T0] Using GB pages for direct mapping
[ 0.049857][ T0] ACPI: Early table checksum verification disabled
[ 0.053112][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.057383][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.062267][ T0] ACPI: FACP 0x00000000BFFFF3B0 000114 (v06 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.068071][ T0] ACPI: DSDT 0x00000000BFFFD5C0 001DED (v02 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.072827][ T0] ACPI: FACS 0x00000000BFFFD580 000040
[ 0.075405][ T0] ACPI: FACS 0x00000000BFFFD580 000040
[ 0.078589][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.083078][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.087252][ T0] ACPI: SSDT 0x00000000BFFFF4D0 000914 (v02 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.091871][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.097874][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff3b0-0xbffff4c3]
[ 0.101171][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd5c0-0xbffff3ac]
[ 0.105430][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd580-0xbfffd5bf]
[ 0.110524][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd580-0xbfffd5bf]
[ 0.113825][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.118094][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.122083][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff4d0-0xbffffde3]
[ 0.125212][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.129310][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.131939][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.134756][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.137308][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.142098][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.148795][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.152330][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.155067][ T0] NODE_DATA(0) allocated [mem 0x13fffb100-0x140000fff]
[ 0.161182][ T0] NODE_DATA(1) allocated [mem 0x23fff7100-0x23fffcfff]
[ 0.477184][ T0] KernelAddressSanitizer initialized (generic)
[ 0.480360][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.481959][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.484888][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.487827][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.491676][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.494398][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.497729][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.501444][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.504051][ T0] CPU topo: Max. logical packages: 1
[ 0.505939][ T0] CPU topo: Max. logical nodes: 1
[ 0.512416][ T0] CPU topo: Num. nodes per package: 1
[ 0.515298][ T0] CPU topo: Max. logical dies: 1
[ 0.518442][ T0] CPU topo: Max. dies per package: 1
[ 0.522813][ T0] CPU topo: Max. threads per core: 2
[ 0.525772][ T0] CPU topo: Num. cores per package: 1
[ 0.528027][ T0] CPU topo: Num. threads per package: 2
[ 0.530076][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.532432][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.536273][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.539285][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.541750][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.544738][ T0] Booting paravirtualized kernel on KVM
[ 0.547270][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.661112][ T0] Zone ranges:
[ 0.663583][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.669727][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.675637][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.680895][ T0] Device empty
[ 0.685296][ T0] Movable zone start for each node
[ 0.688963][ T0] Early memory node ranges
[ 0.692606][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.695704][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.698116][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.700877][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.703568][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.706658][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.748495][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.752073][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.843392][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.948990][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.961820][ T0] percpu: Embedded 72 pages/cpu s254472 r8192 d32248 u1048576
[ 0.970919][ serialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-parallel-0 port 1 (session ID: 22ff37b4020d7f12f71890d05e67e87e7f8209a45b2af5575d91b51d45954192, active connections: 1).
T0] kvm-guest: PV spinlocks enabled
[ 0.976440][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.983700][ 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 \
[ 1.096930][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 1.113895][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 1.130529][ T0] random: crng init done
[ 1.133741][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 1.140698][ T0] software IO TLB: area num 2.
[ 1.179550][ T0] Fallback order for Node 0: 0 1
[ 1.179572][ T0] Fallback order for Node 1: 1 0
[ 1.179585][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 1.193453][ T0] Policy zone: Normal
[ 1.198960][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 1.207350][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 1.218253][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 1.234419][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 2.180010][ T0] **********************************************************
[ 2.185509][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 2.194508][ T0] ** **
[ 2.208275][ T0] ** This system shows unhashed kernel memory addresses **
[ 2.220040][ T0] ** via the console, logs, and other interfaces. This **
[ 2.234101][ T0] ** might reduce the security of your system. **
[ 2.246000][ T0] ** **
[ 2.256013][ T0] ** If you see this message and you are not debugging **
[ 2.268128][ T0] ** the kernel, report this immediately to your system **
[ 2.279271][ T0] ** administrator! **
[ 2.290164][ T0] ** **
[ 2.303140][ T0] ** Use hash_pointers=always to force this mode off **
[ 2.312512][ T0] ** **
[ 2.322121][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 2.335139][ T0] **********************************************************
[ 2.349570][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 2.504709][ T0] allocated 167772160 bytes of page_ext
[ 2.514029][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 2.541012][ T0] Node 0, zone DMA32: page owner found early allocated 21251 pages
[ 2.565239][ T0] Node 0, zone Normal: page owner found early allocated 0 pages
[ 2.596469][ T0] Node 1, zone Normal: page owner found early allocated 19847 pages
[ 2.611048][ T0] Kernel/User page tables isolation: enabled
[ 2.625507][ T0] Dynamic Preempt: full
[ 2.638489][ T0] Running RCU self tests
[ 2.649619][ T0] Running RCU synchronous self tests
[ 2.670820][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 2.694736][ T0] rcu: RCU lockdep checking is enabled.
[ 2.715573][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 2.737476][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 2.761030][ T0] rcu: RCU debug extended QS entry/exit.
[ 2.777734][ T0] All grace periods are expedited (rcu_expedited).
[ 2.794188][ T0] Trampoline variant of Tasks RCU enabled.
[ 2.806263][ T0] Tracing variant of Tasks RCU enabled.
[ 2.820815][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 2.843445][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 2.862177][ T0] Running RCU synchronous self tests
[ 2.874310][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 3.206477][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 3.219399][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 3.244617][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 3.273094][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 3.303457][ T0] Console: colour VGA+ 80x25
[ 3.313288][ T0] printk: console [ttyS0] enabled
[ 3.313288][ T0] printk: console [ttyS0] enabled
[ 3.344663][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 3.344663][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 3.419562][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 3.460980][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 3.473622][ T0] ... MAX_LOCK_DEPTH: 48
[ 3.490931][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 3.512276][ T0] ... CLASSHASH_SIZE: 4096
[ 3.528302][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 3.550769][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 3.567343][ T0] ... CHAINHASH_SIZE: 524288
[ 3.589055][ T0] memory used by lock dependency info: 106625 kB
[ 3.610531][ T0] memory used for stack traces: 8320 kB
[ 3.628551][ T0] per task-struct memory footprint: 1920 bytes
[ 3.643305][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 3.680192][ T0] ACPI: Core revision 20260408
[ 3.695359][ T0] APIC: Switch to symmetric I/O mode setup
[ 3.716987][ T0] x2apic enabled
[ 3.744865][ T0] APIC: Switched APIC routing to: physical x2apic
[ 3.801693][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 3.832500][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 3.872012][ T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[ 3.882624][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 3.891602][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 3.901686][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 3.911604][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 3.921603][ T0] Spectre V2 : Mitigation: IBRS
[ 3.931603][ T0] RETBleed: Mitigation: IBRS
[ 3.941584][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 3.941602][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 3.951607][ T0] MDS: Mitigation: Clear CPU buffers
[ 3.961602][ T0] TAA: Mitigation: Clear CPU buffers
[ 3.971603][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 3.981605][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 3.991609][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 4.001635][ T0] Spectre V2 : Enabling IBPB for BPF
[ 4.011627][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 4.021651][ T0] active return thunk: its_return_thunk
[ 4.031604][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 4.041679][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 4.051605][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 4.061605][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 4.072379][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 4.081606][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 4.095462][ T0] ------------[ cut here ]------------
[ 4.101608][ T0] CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 1b200
[ 4.111604][ T0] WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820, CPU#0: swapper/0/0
[ 4.121604][ T0] Modules linked in:
[ 4.131611][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 4.141605][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026
[ 4.151605][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 4.161607][ T0] Code: 00 00 e8 9a f5 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 97 03 03 0f 48 8b b4 24 a0 00 00 00 4c 89 f2 4c 8b 4c 24 50 <67> 48 0f b9 3a e9 8d 00 00 00 e8 68 f5 4d 00 4c 89 f8 48 c1 e8 03
[ 4.171603][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 4.181603][ T0] RAX: ffffffff817aa2e6 RBX: 800000001b200023 RCX: ffffffffa0000000
[ 4.191603][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907da690
[ 4.201603][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200
[ 4.211602][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 4.221604][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 4.231606][ T0] FS: 0000000000000000(0000) GS:ffff888124c9a000(0000) knlGS:0000000000000000
[ 4.241604][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 4.251616][ T0] CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0
[ 4.261607][ T0] Call Trace:
[ 4.271607][ T0]
[ 4.280976][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 4.281612][ T0] ? __purge_vmap_area_lazy+0x8ec/0xab0
[ 4.291617][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 4.301604][ T0] ? __might_resched+0x71/0x4c0
[ 4.311611][ T0] ? down_read+0x2b9/0x320
[ 4.321610][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 4.331614][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 4.341616][ T0] ? trace_kmalloc+0x2a/0xf0
[ 4.351613][ T0] set_memory_x+0xd6/0x110
[ 4.361611][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 4.371616][ T0] apply_retpolines+0x8e9/0x15a0
[ 4.381614][ T0] ? events_sysfs_show+0xdd/0xf0
[ 4.391610][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 4.401613][ T0] ? events_sysfs_show+0xdd/0xf0
[ 4.411605][ T0] ? events_sysfs_show+0xec/0xf0
[ 4.421606][ T0] ? events_sysfs_show+0xe3/0xf0
[ 4.431607][ T0] ? unregister_die_notifier+0x43/0x50
[ 4.441611][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 4.451614][ T0] alternative_instructions+0x3a/0x100
[ 4.461612][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 4.471614][ T0] start_kernel+0x315/0x3e0
[ 4.481615][ T0] x86_64_start_reservations+0x24/0x30
[ 4.491614][ T0] x86_64_start_kernel+0x137/0x1b0
[ 4.501610][ T0] common_startup_64+0x13e/0x157
[ 4.511622][ T0]
[ 4.521609][ T0] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 4.531584][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 4.531584][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/08/2026
[ 4.531584][ T0] Call Trace:
[ 4.531584][ T0]
[ 4.531584][ T0] vpanic+0x56d/0xa70
[ 4.531584][ T0] ? __pfx__printk+0x10/0x10
[ 4.531584][ T0] ? __pfx_vpanic+0x10/0x10
[ 4.531584][ T0] ? is_bpf_text_address+0x292/0x2b0
[ 4.531584][ T0] ? is_bpf_text_address+0x26/0x2b0
[ 4.531584][ T0] panic+0xc5/0xd0
[ 4.531584][ T0] ? __pfx_panic+0x10/0x10
[ 4.531584][ T0] ? common_startup_64+0x13e/0x157
[ 4.531584][ T0] __warn+0x315/0x4c0
[ 4.531584][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 4.531584][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 4.531584][ T0] __report_bug+0x276/0x570
[ 4.531584][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 4.531584][ T0] ? __pfx___report_bug+0x10/0x10
[ 4.531584][ T0] report_bug_entry+0x19b/0x290
[ 4.531584][ T0] ? __change_page_attr_set_clr+0x1d79/0x2820
[ 4.531584][ T0] ? __change_page_attr_set_clr+0x1d7e/0x2820
[ 4.531584][ T0] handle_bug+0xce/0x200
[ 4.531584][ T0] exc_invalid_op+0x1a/0x50
[ 4.531584][ T0] asm_exc_invalid_op+0x1a/0x20
[ 4.531584][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 4.531584][ T0] Code: 00 00 e8 9a f5 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 97 03 03 0f 48 8b b4 24 a0 00 00 00 4c 89 f2 4c 8b 4c 24 50 <67> 48 0f b9 3a e9 8d 00 00 00 e8 68 f5 4d 00 4c 89 f8 48 c1 e8 03
[ 4.531584][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 4.531584][ T0] RAX: ffffffff817aa2e6 RBX: 800000001b200023 RCX: ffffffffa0000000
[ 4.531584][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907da690
[ 4.531584][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200
[ 4.531584][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 4.531584][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 4.531584][ T0] ? __change_page_attr_set_clr+0x1d56/0x2820
[ 4.531584][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 4.531584][ T0] ? __purge_vmap_area_lazy+0x8ec/0xab0
[ 4.531584][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 4.531584][ T0] ? __might_resched+0x71/0x4c0
[ 4.531584][ T0] ? down_read+0x2b9/0x320
[ 4.531584][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 4.531584][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 4.531584][ T0] ? trace_kmalloc+0x2a/0xf0
[ 4.531584][ T0] set_memory_x+0xd6/0x110
[ 4.531584][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 4.531584][ T0] apply_retpolines+0x8e9/0x15a0
[ 4.531584][ T0] ? events_sysfs_show+0xdd/0xf0
[ 4.531584][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 4.531584][ T0] ? events_sysfs_show+0xdd/0xf0
[ 4.531584][ T0] ? events_sysfs_show+0xec/0xf0
[ 4.531584][ T0] ? events_sysfs_show+0xe3/0xf0
[ 4.531584][ T0] ? unregister_die_notifier+0x43/0x50
[ 4.531584][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 4.531584][ T0] alternative_instructions+0x3a/0x100
[ 4.531584][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 4.531584][ T0] start_kernel+0x315/0x3e0
[ 4.531584][ T0] x86_64_start_reservations+0x24/0x30
[ 4.531584][ T0] x86_64_start_kernel+0x137/0x1b0
[ 4.531584][ T0] common_startup_64+0x13e/0x157
[ 4.531584][ T0]
[ 4.531584][ T0] Rebooting in 86400 seconds..