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 ba 6c 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 be 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 88 6c 4d 00 4c 89 f8 48 c1 e8 03
RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
RAX: ffffffff817a6b66 RBX: 8000000140600023 RCX: ffffffffa0000000
RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d2980
RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
FS: 0000000000000000(0000) GS:ffff888124cbf000(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 ba 6c 4d 00 call 0x4d6cc1
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 be 02 0f lea 0xf02be07(%rip),%rdi # 0xf02be21
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 88 6c 4d 00 call 0x4d6cc1
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@10.128.0.48" "pwd"]: exit status 255
ssh: connect to host 10.128.0.48 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 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
[ 0.000016][ T0] kvm-clock: using sched offset of 12236548096 cycles
[ 0.002920][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.011824][ T0] tsc: Detected 2199.998 MHz processor
[ 0.018322][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.021412][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.027389][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.030350][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.038268][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.041727][ T0] Using GB pages for direct mapping
[ 0.047028][ T0] ACPI: Early table checksum verification disabled
[ 0.050339][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.053133][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.056835][ T0] ACPI: FACP 0x00000000BFFFF370 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.060996][ T0] ACPI: DSDT 0x00000000BFFFD900 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.064722][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.067109][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.069817][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.073690][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.077341][ T0] ACPI: SSDT 0x00000000BFFFF470 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.082026][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.086140][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff370-0xbffff463]
[ 0.089163][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd900-0xbffff363]
[ 0.092794][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.096002][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.100072][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.103585][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.107211][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff470-0xbffffdef]
[ 0.111143][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.115870][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.120206][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.123597][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.128509][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.136321][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.141795][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.145848][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.149721][ T0] NODE_DATA(0) allocated [mem 0x13fffb100-0x140000fff]
[ 0.153867][ T0] NODE_DATA(1) allocated [mem 0x23fff7100-0x23fffcfff]
[ 0.463199][ T0] KernelAddressSanitizer initialized (generic)
[ 0.466323][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.467986][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.470100][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.474645][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.478775][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.481975][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.486126][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.489854][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.492959][ T0] CPU topo: Max. logical packages: 1
[ 0.495002][ T0] CPU topo: Max. logical nodes: 1
[ 0.497750][ T0] CPU topo: Num. nodes per package: 1
[ 0.500719][ T0] CPU topo: Max. logical dies: 1
[ 0.503769][ T0] CPU topo: Max. dies per package: 1
[ 0.506234][ T0] CPU topo: Max. threads per core: 2
[ 0.508621][ T0] CPU topo: Num. cores per package: 1
[ 0.512028][ T0] CPU topo: Num. threads per package: 2
[ 0.515382][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.518735][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.522007][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.525850][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.529671][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.532273][ T0] Booting paravirtualized kernel on KVM
[ 0.536334][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.647738][ T0] Zone ranges:
[ 0.649601][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.654302][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.658608][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.661304][ T0] Device empty
[ 0.662777][ T0] Movable zone start for each node
[ 0.665476][ T0] Early memory node ranges
[ 0.668504][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.672739][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.681713][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.686912][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.692833][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.696686][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.741851][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.746435][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.863956][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.981473][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.987884][ T0] percpu: Embedded 71 pages/cpu s253512 r8192 d29112 u1048576
[ 0.991003][ T0] kvm-guest: PV spinlocks enabled
[ 0.994494][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.998695][ 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 \
[ 1.045883][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 1.058019][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 1.063099][ T0] random: crng init done
[ 1.064931][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 1.068654][ T0] software IO TLB: area num 2.
[ 1.098640][ T0] Fallback order for Node 0: 0 1
[ 1.098664][ T0] Fallback order for Node 1: 1 0
[ 1.098680][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 1.107181][ T0] Policy zone: Normal
[ 1.110583][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 1.114456][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 1.117987][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 1.127480][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.894855][ T0] **********************************************************
[ 1.899266][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.903020][ T0] ** **
[ 1.907332][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.912239][ T0] ** via the console, logs, and other interfaces. This **
[ 1.915625][ T0] ** might reduce the security of your system. **
[ 1.918797][ T0] ** **
[ 1.921891][ T0] ** If you see this message and you are not debugging **
[ 1.925861][ T0] ** the kernel, report this immediately to your system **
[ 1.929284][ T0] ** administrator! **
[ 1.933219][ T0] ** **
[ 1.939168][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.942570][ T0] ** **
[ 1.945644][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.948907][ T0] **********************************************************
[ 1.956785][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 2.077422][ T0] allocated 167772160 bytes of page_ext
[ 2.080137][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 2.098782][ T0] Node 0, zone DMA32: page owner found early allocated 21251 pages
[ 2.106709][ T0] Node 0, zone Normal: page owner found early allocated 0 pages
[ 2.121840][ T0] Node 1, zone Normal: page owner found early allocated 19847 pages
[ 2.127381][ T0] Kernel/User page tables isolation: enabled
[ 2.132564][ T0] Dynamic Preempt: full
[ 2.137369][ T0] Running RCU self tests
[ 2.140018][ T0] Running RCU synchronous self tests
[ 2.142264][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 2.146239][ T0] rcu: RCU lockdep checking is enabled.
[ 2.149206][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 2.152340][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 2.155860][ T0] rcu: RCU debug extended QS entry/exit.
[ 2.159748][ T0] All grace periods are expedited (rcu_expedited).
[ 2.164882][ T0] Trampoline variant of Tasks RCU enabled.
[ 2.167480][ T0] Tracing variant of Tasks RCU enabled.
[ 2.172040][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 2.177672][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 2.182358][ T0] Running RCU synchronous self tests
[ 2.184804][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 2.389672][ serialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-parallel-0 port 1 (session ID: b88ed8792e1663a1937135d15c962c8178345d6e722a2546afc86742fdcbc5f0, active connections: 1).
T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 2.394450][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 2.398237][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 2.405818][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 2.413327][ T0] Console: colour VGA+ 80x25
[ 2.415838][ T0] printk: console [ttyS0] enabled
[ 2.415838][ T0] printk: console [ttyS0] enabled
[ 2.419753][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.419753][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.427189][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 2.432768][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 2.436096][ T0] ... MAX_LOCK_DEPTH: 48
[ 2.438796][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 2.441376][ T0] ... CLASSHASH_SIZE: 4096
[ 2.444234][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 2.447464][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 2.450531][ T0] ... CHAINHASH_SIZE: 524288
[ 2.453272][ T0] memory used by lock dependency info: 106625 kB
[ 2.456705][ T0] memory used for stack traces: 8320 kB
[ 2.459638][ T0] per task-struct memory footprint: 1920 bytes
[ 2.463729][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 2.471310][ T0] ACPI: Core revision 20260408
[ 2.475246][ T0] APIC: Switch to symmetric I/O mode setup
[ 2.480604][ T0] x2apic enabled
[ 2.492330][ T0] APIC: Switched APIC routing to: physical x2apic
[ 2.508112][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 2.513040][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 2.519456][ T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[ 2.524103][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 2.529455][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 2.533257][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 2.539457][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 2.543752][ T0] Spectre V2 : Mitigation: IBRS
[ 2.546078][ T0] RETBleed: Mitigation: IBRS
[ 2.549456][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 2.552071][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 2.556252][ T0] MDS: Mitigation: Clear CPU buffers
[ 2.559459][ T0] TAA: Mitigation: Clear CPU buffers
[ 2.563447][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 2.569458][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 2.579462][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 2.584089][ T0] Spectre V2 : Enabling IBPB for BPF
[ 2.586474][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 2.589514][ T0] active return thunk: its_return_thunk
[ 2.593998][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 2.599530][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 2.609460][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 2.613501][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 2.617348][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 2.619458][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 2.629712][ T0] ------------[ cut here ]------------
[ 2.633885][ T0] CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 140600
[ 2.639464][ T0] WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820, CPU#0: swapper/0/0
[ 2.649486][ T0] Modules linked in:
[ 2.653316][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.659466][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.665688][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.669460][ T0] Code: 00 00 e8 ba 6c 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 be 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 88 6c 4d 00 4c 89 f8 48 c1 e8 03
[ 2.679458][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.682184][ T0] RAX: ffffffff817a6b66 RBX: 8000000140600023 RCX: ffffffffa0000000
[ 2.689458][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d2980
[ 2.693573][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
[ 2.696771][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.699458][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.703694][ T0] FS: 0000000000000000(0000) GS:ffff888124cbf000(0000) knlGS:0000000000000000
[ 2.707629][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.709460][ T0] CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0
[ 2.713718][ T0] Call Trace:
[ 2.715804][ T0]
[ 2.719476][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.722162][ T0] ? __purge_vmap_area_lazy+0x964/0xb40
[ 2.724364][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.729459][ T0] ? __might_resched+0x71/0x4c0
[ 2.732797][ T0] ? down_read+0x2b9/0x320
[ 2.735656][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.739477][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.742404][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.745098][ T0] set_memory_x+0xd6/0x110
[ 2.747182][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.749470][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.751497][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.753873][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.757438][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.759463][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.762294][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.764648][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.769467][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.771474][ T0] alternative_instructions+0x3a/0x100
[ 2.773752][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.775556][ T0] start_kernel+0x310/0x3e0
[ 2.777154][ T0] x86_64_start_reservations+0x24/0x30
[ 2.779457][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.781190][ T0] common_startup_64+0x13e/0x157
[ 2.783698][ T0]
[ 2.784977][ T0] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 2.788191][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.789439][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.789439][ T0] Call Trace:
[ 2.789439][ T0]
[ 2.789439][ T0] vpanic+0x56d/0xa70
[ 2.789439][ T0] ? __pfx__printk+0x10/0x10
[ 2.789439][ T0] ? __pfx_vpanic+0x10/0x10
[ 2.789439][ T0] ? is_bpf_text_address+0x292/0x2b0
[ 2.789439][ T0] ? is_bpf_text_address+0x26/0x2b0
[ 2.789439][ T0] panic+0xc5/0xd0
[ 2.789439][ T0] ? __pfx_panic+0x10/0x10
[ 2.789439][ T0] ? common_startup_64+0x13e/0x157
[ 2.789439][ T0] __warn+0x315/0x4c0
[ 2.789439][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.789439][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.789439][ T0] __report_bug+0x276/0x570
[ 2.789439][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.789439][ T0] ? __pfx___report_bug+0x10/0x10
[ 2.789439][ T0] report_bug_entry+0x19b/0x290
[ 2.789439][ T0] ? __change_page_attr_set_clr+0x1d79/0x2820
[ 2.789439][ T0] ? __change_page_attr_set_clr+0x1d7e/0x2820
[ 2.789439][ T0] handle_bug+0xce/0x200
[ 2.789439][ T0] exc_invalid_op+0x1a/0x50
[ 2.789439][ T0] asm_exc_invalid_op+0x1a/0x20
[ 2.789439][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.789439][ T0] Code: 00 00 e8 ba 6c 4d 00 48 8b 4c 24 30 4c 8d 81 ff 0f 00 00 48 8d 3d 07 be 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 88 6c 4d 00 4c 89 f8 48 c1 e8 03
[ 2.789439][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.789439][ T0] RAX: ffffffff817a6b66 RBX: 8000000140600023 RCX: ffffffffa0000000
[ 2.789439][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d2980
[ 2.789439][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 0000000000140600
[ 2.789439][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.789439][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.789439][ T0] ? __change_page_attr_set_clr+0x1d56/0x2820
[ 2.789439][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.789439][ T0] ? __purge_vmap_area_lazy+0x964/0xb40
[ 2.789439][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.789439][ T0] ? __might_resched+0x71/0x4c0
[ 2.789439][ T0] ? down_read+0x2b9/0x320
[ 2.789439][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.789439][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.789439][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.789439][ T0] set_memory_x+0xd6/0x110
[ 2.789439][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.789439][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.789439][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.789439][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.789439][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.789439][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.789439][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.789439][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.789439][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.789439][ T0] alternative_instructions+0x3a/0x100
[ 2.789439][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.789439][ T0] start_kernel+0x310/0x3e0
[ 2.789439][ T0] x86_64_start_reservations+0x24/0x30
[ 2.789439][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.789439][ T0] common_startup_64+0x13e/0x157
[ 2.789439][ T0]
[ 2.789439][ T0] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=)
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-build297139828=/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=)
HEAD detached at c38879ea490
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}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=c38879ea49099c3d2a402e615172fc71484df058 -X github.com/google/syzkaller/prog.gitRevisionDate=20260806-133512" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=c38879ea49099c3d2a402e615172fc71484df058 -X github.com/google/syzkaller/prog.gitRevisionDate=20260806-133512" ./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
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=c38879ea49099c3d2a402e615172fc71484df058 -X github.com/google/syzkaller/prog.gitRevisionDate=20260806-133512" -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 -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"c38879ea49099c3d2a402e615172fc71484df058\"
/usr/bin/ld: /tmp/cc0AXPWV.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
./tools/check-syzos.sh 2>/dev/null