10-Sep-2026 05:01:17: building syzkaller on 8387c27382b21161a70829b74fa8d5e67db1d2fc...
10-Sep-2026 05:11:21: fetching kernel...
10-Sep-2026 05:11:25: checked out kernel commit c68a982815dcce5464e3bf2a31ac94f5146c04ca ("Add linux-next specific files for 20260909", 2026-09-09 15:24:46 +0100 +0100)
10-Sep-2026 05:11:25: cleaning kernel...
10-Sep-2026 05:12:51: applying patch (475 bytes)...
10-Sep-2026 05:12:51: building kernel...
10-Sep-2026 05:25:43: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
10-Sep-2026 05:25:43: testing patch...
10-Sep-2026 05:36:05: 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 140600
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 07/24/2026
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 aa d6 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 99 02 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 78 d6 4d 00 4c 89 f8 48 c1 e8 03
RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
RAX: ffffffff817ac2e6 RBX: 8000000140600023 RCX: ffffffffa0000000
RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d5c00
RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
FS: 0000000000000000(0000) GS:ffff888124caa000(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:2283
arch_cpu_finalize_init+0xb2/0x1f0 arch/x86/kernel/cpu/common.c:2643
start_kernel+0x310/0x3e0 init/main.c:1153
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 aa d6 4d 00 call 0x4dd6b1
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 07 99 02 0f lea 0xf029907(%rip),%rdi # 0xf029921
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 78 d6 4d 00 call 0x4dd6b1
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@10.128.1.164" "pwd"]: exit status 255
ssh: connect to host 10.128.1.164 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] Bserialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-parallel-0 port 1 (session ID: 7be82914bde73d92f0e92421452cc841252f4e26a898f83e375968ba7aa02212, active connections: 1).
IOS-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 07/24/2026
[ 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 10021615750 cycles
[ 0.002765][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.015846][ T0] tsc: Detected 2199.998 MHz processor
[ 0.023090][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.027936][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.033050][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.036382][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.045166][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.050344][ T0] Using GB pages for direct mapping
[ 0.056593][ T0] ACPI: Early table checksum verification disabled
[ 0.059870][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.062886][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.067501][ T0] ACPI: FACP 0x00000000BFFFF370 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.073167][ T0] ACPI: DSDT 0x00000000BFFFD900 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.077899][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.080263][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.083912][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.087813][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.093382][ T0] ACPI: SSDT 0x00000000BFFFF470 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.098235][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.103337][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff370-0xbffff463]
[ 0.107192][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd900-0xbffff363]
[ 0.111499][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.117206][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.120933][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.125105][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.130133][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff470-0xbffffdef]
[ 0.133876][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.138097][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.140621][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.143668][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.146871][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.152274][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.157038][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.160868][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.163756][ T0] NODE_DATA(0) allocated [mem 0x13fffb100-0x140000fff]
[ 0.167054][ T0] NODE_DATA(1) allocated [mem 0x23fff7100-0x23fffcfff]
[ 0.466799][ T0] KernelAddressSanitizer initialized (generic)
[ 0.470136][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.472411][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.475242][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.478544][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.482537][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.486026][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.489967][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.493082][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.496733][ T0] CPU topo: Max. logical packages: 1
[ 0.498998][ T0] CPU topo: Max. logical nodes: 1
[ 0.501194][ T0] CPU topo: Num. nodes per package: 1
[ 0.503204][ T0] CPU topo: Max. logical dies: 1
[ 0.505603][ T0] CPU topo: Max. dies per package: 1
[ 0.507923][ T0] CPU topo: Max. threads per core: 2
[ 0.510291][ T0] CPU topo: Num. cores per package: 1
[ 0.512637][ T0] CPU topo: Num. threads per package: 2
[ 0.514762][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.518759][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.522776][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.526145][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.530115][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.532478][ T0] Booting paravirtualized kernel on KVM
[ 0.534752][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.650816][ T0] Zone ranges:
[ 0.651982][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.654396][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.657170][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.659698][ T0] Device empty
[ 0.661038][ T0] Movable zone start for each node
[ 0.662979][ T0] Early memory node ranges
[ 0.664875][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.668023][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.671415][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.674071][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.678150][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.681437][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.722897][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.725716][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.817127][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.917860][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.922105][ T0] percpu: Embedded 72 pages/cpu s254216 r8192 d32504 u1048576
[ 0.925377][ T0] kvm-guest: PV spinlocks enabled
[ 0.927363][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.931098][ 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 \
[ 0.968524][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 0.978805][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 0.982523][ T0] random: crng init done
[ 0.983960][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 0.987233][ T0] software IO TLB: area num 2.
[ 1.016322][ T0] Fallback order for Node 0: 0 1
[ 1.016345][ T0] Fallback order for Node 1: 1 0
[ 1.016358][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 1.023498][ T0] Policy zone: Normal
[ 1.026027][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 1.029416][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 1.032520][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 1.040448][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.750524][ T0] **********************************************************
[ 1.753736][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.757960][ T0] ** **
[ 1.761936][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.765494][ T0] ** via the console, logs, and other interfaces. This **
[ 1.769501][ T0] ** might reduce the security of your system. **
[ 1.773513][ T0] ** **
[ 1.777472][ T0] ** If you see this message and you are not debugging **
[ 1.783064][ T0] ** the kernel, report this immediately to your system **
[ 1.788983][ T0] ** administrator! **
[ 1.792715][ T0] ** **
[ 1.798501][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.803965][ T0] ** **
[ 1.809538][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.814932][ T0] **********************************************************
[ 1.821752][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 1.943270][ T0] allocated 167772160 bytes of page_ext
[ 1.947602][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 1.966625][ T0] Node 0, zone DMA32: page owner found early allocated 21251 pages
[ 1.974793][ T0] Node 0, zone Normal: page owner found early allocated 0 pages
[ 1.991039][ T0] Node 1, zone Normal: page owner found early allocated 19847 pages
[ 1.995618][ T0] Kernel/User page tables isolation: enabled
[ 1.999791][ T0] Dynamic Preempt: full
[ 2.003321][ T0] Running RCU self tests
[ 2.005099][ T0] Running RCU synchronous self tests
[ 2.007600][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 2.010877][ T0] rcu: RCU lockdep checking is enabled.
[ 2.013334][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 2.015732][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 2.018694][ T0] rcu: RCU debug extended QS entry/exit.
[ 2.021124][ T0] All grace periods are expedited (rcu_expedited).
[ 2.023924][ T0] Trampoline variant of Tasks RCU enabled.
[ 2.026688][ T0] Tracing variant of Tasks RCU enabled.
[ 2.028337][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 2.031013][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 2.034109][ T0] Running RCU synchronous self tests
[ 2.036292][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 2.228766][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 2.232489][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 2.235324][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 2.239827][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 2.245084][ T0] Console: colour VGA+ 80x25
[ 2.247483][ T0] printk: console [ttyS0] enabled
[ 2.247483][ T0] printk: console [ttyS0] enabled
[ 2.251866][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.251866][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.257603][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 2.261940][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 2.263749][ T0] ... MAX_LOCK_DEPTH: 48
[ 2.265687][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 2.267675][ T0] ... CLASSHASH_SIZE: 4096
[ 2.269952][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 2.272157][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 2.275305][ T0] ... CHAINHASH_SIZE: 524288
[ 2.277682][ T0] memory used by lock dependency info: 106625 kB
[ 2.280361][ T0] memory used for stack traces: 8320 kB
[ 2.282414][ T0] per task-struct memory footprint: 1920 bytes
[ 2.285615][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 2.291031][ T0] ACPI: Core revision 20260408
[ 2.294830][ T0] APIC: Switch to symmetric I/O mode setup
[ 2.298246][ T0] x2apic enabled
[ 2.305430][ T0] APIC: Switched APIC routing to: physical x2apic
[ 2.318262][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 2.323719][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 2.329358][ T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[ 2.334112][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 2.339354][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 2.343080][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 2.349359][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 2.354378][ T0] Spectre V2 : Mitigation: IBRS
[ 2.359359][ T0] RETBleed: Mitigation: IBRS
[ 2.361241][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 2.364946][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 2.367565][ T0] MDS: Mitigation: Clear CPU buffers
[ 2.369355][ T0] TAA: Mitigation: Clear CPU buffers
[ 2.372469][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 2.376323][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 2.379361][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 2.383706][ T0] Spectre V2 : Enabling IBPB for BPF
[ 2.385950][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 2.389403][ T0] active return thunk: its_return_thunk
[ 2.392147][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 2.396573][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 2.399361][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 2.402238][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 2.409363][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 2.412569][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 2.419801][ T0] ------------[ cut here ]------------
[ 2.422413][ T0] CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 140600
[ 2.427891][ T0] WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820, CPU#0: swapper/0/0
[ 2.429359][ T0] Modules linked in:
[ 2.431164][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.434927][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.439361][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.442491][ T0] Code: 00 00 e8 aa d6 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 99 02 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 78 d6 4d 00 4c 89 f8 48 c1 e8 03
[ 2.449361][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.459359][ T0] RAX: ffffffff817ac2e6 RBX: 8000000140600023 RCX: ffffffffa0000000
[ 2.462919][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d5c00
[ 2.466637][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
[ 2.469359][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.473051][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.476352][ T0] FS: 0000000000000000(0000) GS:ffff888124caa000(0000) knlGS:0000000000000000
[ 2.479359][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.482418][ T0] CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0
[ 2.486229][ T0] Call Trace:
[ 2.489362][ T0]
[ 2.491233][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.494256][ T0] ? __purge_vmap_area_lazy+0x8ec/0xab0
[ 2.497016][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.499360][ T0] ? __might_resched+0x71/0x4c0
[ 2.502118][ T0] ? down_read+0x2b9/0x320
[ 2.503975][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.506152][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.509369][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.511042][ T0] set_memory_x+0xd6/0x110
[ 2.512710][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.514452][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.517209][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.519368][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.521794][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.524279][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.526697][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.529359][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.531318][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.533529][ T0] alternative_instructions+0x3a/0x100
[ 2.535912][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.537927][ T0] start_kernel+0x310/0x3e0
[ 2.539365][ T0] x86_64_start_reservations+0x24/0x30
[ 2.542812][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.544878][ T0] common_startup_64+0x13e/0x157
[ 2.547017][ T0]
[ 2.549359][ T0] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 2.552768][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.557207][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.559341][ T0] Call Trace:
[ 2.559341][ T0]
[ 2.559341][ T0] vpanic+0x56d/0xa70
[ 2.559341][ T0] ? __pfx__printk+0x10/0x10
[ 2.559341][ T0] ? __pfx_vpanic+0x10/0x10
[ 2.559341][ T0] ? is_bpf_text_address+0x292/0x2b0
[ 2.559341][ T0] ? is_bpf_text_address+0x26/0x2b0
[ 2.559341][ T0] panic+0xc5/0xd0
[ 2.559341][ T0] ? __pfx_panic+0x10/0x10
[ 2.559341][ T0] ? common_startup_64+0x13e/0x157
[ 2.559341][ T0] __warn+0x315/0x4c0
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.559341][ T0] __report_bug+0x276/0x570
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.559341][ T0] ? __pfx___report_bug+0x10/0x10
[ 2.559341][ T0] report_bug_entry+0x19b/0x290
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d79/0x2820
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d7e/0x2820
[ 2.559341][ T0] handle_bug+0xce/0x200
[ 2.559341][ T0] exc_invalid_op+0x1a/0x50
[ 2.559341][ T0] asm_exc_invalid_op+0x1a/0x20
[ 2.559341][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.559341][ T0] Code: 00 00 e8 aa d6 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 99 02 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 78 d6 4d 00 4c 89 f8 48 c1 e8 03
[ 2.559341][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.559341][ T0] RAX: ffffffff817ac2e6 RBX: 8000000140600023 RCX: ffffffffa0000000
[ 2.559341][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d5c00
[ 2.559341][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
[ 2.559341][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.559341][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.559341][ T0] ? __change_page_attr_set_clr+0x1d56/0x2820
[ 2.559341][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.559341][ T0] ? __purge_vmap_area_lazy+0x8ec/0xab0
[ 2.559341][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.559341][ T0] ? __might_resched+0x71/0x4c0
[ 2.559341][ T0] ? down_read+0x2b9/0x320
[ 2.559341][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.559341][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.559341][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.559341][ T0] set_memory_x+0xd6/0x110
[ 2.559341][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.559341][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.559341][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.559341][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.559341][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.559341][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.559341][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.559341][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.559341][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.559341][ T0] alternative_instructions+0x3a/0x100
[ 2.559341][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.559341][ T0] start_kernel+0x310/0x3e0
[ 2.559341][ T0] x86_64_start_reservations+0x24/0x30
[ 2.559341][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.559341][ T0] common_startup_64+0x13e/0x157
[ 2.559341][ T0]
[ 2.559341][ T0] Rebooting in 86400 seconds..