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 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: 800000001b200023 RCX: ffffffffa0000000
RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d2980
RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200
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@10.128.10.28" "pwd"]: exit status 255
ssh: connect to host 10.128.10.28 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 85c153cd-840f-ebac-6288-906c82bab796
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
[ 0.000008][ T0] kvm-clock: using sched offset of 10580361476 cycles
[ 0.002153][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.009178][ T0] tsc: Detected 2199.998 MHz processor
[ 0.015395][ T0] last_pfn = 0x240000 max_serialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-0 port 1 (session ID: c7b7cb3d35eb7c29095b910341de89e57d14e59b6628a8d5d9aed8113c6a2e19, active connections: 1).
arch_pfn = 0x400000000
[ 0.017987][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.021577][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.024459][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.031550][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.034163][ T0] Using GB pages for direct mapping
[ 0.038710][ T0] ACPI: Early table checksum verification disabled
[ 0.042273][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.045601][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.050269][ T0] ACPI: FACP 0x00000000BFFFF370 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.054728][ T0] ACPI: DSDT 0x00000000BFFFD900 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.058718][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.061138][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.063444][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.068234][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.071733][ T0] ACPI: SSDT 0x00000000BFFFF470 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.076442][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.080907][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff370-0xbffff463]
[ 0.084074][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd900-0xbffff363]
[ 0.088142][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.091762][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.095305][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.098496][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.101581][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff470-0xbffffdef]
[ 0.105226][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.109021][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.112053][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.114975][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.117884][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.122244][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.127080][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.130249][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.134187][ T0] NODE_DATA(0) allocated [mem 0x13fffb100-0x140000fff]
[ 0.138092][ T0] NODE_DATA(1) allocated [mem 0x23fff7100-0x23fffcfff]
[ 0.436275][ T0] KernelAddressSanitizer initialized (generic)
[ 0.439858][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.442097][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.444977][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.448388][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.451921][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.454624][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.457899][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.461317][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.464654][ T0] CPU topo: Max. logical packages: 1
[ 0.466829][ T0] CPU topo: Max. logical nodes: 1
[ 0.469677][ T0] CPU topo: Num. nodes per package: 1
[ 0.471779][ T0] CPU topo: Max. logical dies: 1
[ 0.473629][ T0] CPU topo: Max. dies per package: 1
[ 0.475546][ T0] CPU topo: Max. threads per core: 2
[ 0.478554][ T0] CPU topo: Num. cores per package: 1
[ 0.480675][ T0] CPU topo: Num. threads per package: 2
[ 0.483232][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.486182][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.489248][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.492172][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.495105][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.497574][ T0] Booting paravirtualized kernel on KVM
[ 0.499138][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.608027][ T0] Zone ranges:
[ 0.609164][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.613176][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.616507][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.619476][ T0] Device empty
[ 0.621113][ T0] Movable zone start for each node
[ 0.623365][ T0] Early memory node ranges
[ 0.625272][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.628328][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.631575][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.634107][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.637282][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.640311][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.681560][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.684755][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.795118][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.908228][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.913032][ T0] percpu: Embedded 71 pages/cpu s253512 r8192 d29112 u1048576
[ 0.916834][ T0] kvm-guest: PV spinlocks enabled
[ 0.919146][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.922315][ 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 \
[ 0.957249][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 0.969149][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 0.973308][ T0] random: crng init done
[ 0.975557][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 0.979282][ T0] software IO TLB: area num 2.
[ 1.008751][ T0] Fallback order for Node 0: 0 1
[ 1.008774][ T0] Fallback order for Node 1: 1 0
[ 1.008787][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 1.015505][ T0] Policy zone: Normal
[ 1.017591][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 1.021206][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 1.024426][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 1.031961][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.755266][ T0] **********************************************************
[ 1.757586][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.759494][ T0] ** **
[ 1.762376][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.765269][ T0] ** via the console, logs, and other interfaces. This **
[ 1.768565][ T0] ** might reduce the security of your system. **
[ 1.771104][ T0] ** **
[ 1.774398][ T0] ** If you see this message and you are not debugging **
[ 1.776805][ T0] ** the kernel, report this immediately to your system **
[ 1.779543][ T0] ** administrator! **
[ 1.781975][ T0] ** **
[ 1.784320][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.786794][ T0] ** **
[ 1.789256][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.792496][ T0] **********************************************************
[ 1.798631][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 1.914559][ T0] allocated 167772160 bytes of page_ext
[ 1.916600][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 1.934027][ T0] Node 0, zone DMA32: page owner found early allocated 21251 pages
[ 1.942131][ T0] Node 0, zone Normal: page owner found early allocated 0 pages
[ 1.957108][ T0] Node 1, zone Normal: page owner found early allocated 19847 pages
[ 1.960603][ T0] Kernel/User page tables isolation: enabled
[ 1.964841][ T0] Dynamic Preempt: full
[ 1.967849][ T0] Running RCU self tests
[ 1.969520][ T0] Running RCU synchronous self tests
[ 1.971699][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 1.974420][ T0] rcu: RCU lockdep checking is enabled.
[ 1.976403][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 1.979106][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 1.981641][ T0] rcu: RCU debug extended QS entry/exit.
[ 1.983493][ T0] All grace periods are expedited (rcu_expedited).
[ 1.985710][ T0] Trampoline variant of Tasks RCU enabled.
[ 1.989926][ T0] Tracing variant of Tasks RCU enabled.
[ 1.991907][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 1.995032][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 1.998257][ T0] Running RCU synchronous self tests
[ 2.000227][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 2.203482][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 2.207641][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 2.210527][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 2.216212][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 2.223384][ T0] Console: colour VGA+ 80x25
[ 2.225682][ T0] printk: console [ttyS0] enabled
[ 2.225682][ T0] printk: console [ttyS0] enabled
[ 2.230412][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.230412][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.235857][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 2.239565][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 2.242231][ T0] ... MAX_LOCK_DEPTH: 48
[ 2.244577][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 2.247032][ T0] ... CLASSHASH_SIZE: 4096
[ 2.249215][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 2.251617][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 2.255071][ T0] ... CHAINHASH_SIZE: 524288
[ 2.257787][ T0] memory used by lock dependency info: 106625 kB
[ 2.260983][ T0] memory used for stack traces: 8320 kB
[ 2.263426][ T0] per task-struct memory footprint: 1920 bytes
[ 2.266478][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 2.272008][ T0] ACPI: Core revision 20260408
[ 2.275657][ T0] APIC: Switch to symmetric I/O mode setup
[ 2.279828][ T0] x2apic enabled
[ 2.289327][ T0] APIC: Switched APIC routing to: physical x2apic
[ 2.305106][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 2.309643][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 2.314724][ T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[ 2.325438][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 2.328207][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 2.334801][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 2.339664][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 2.344730][ T0] Spectre V2 : Mitigation: IBRS
[ 2.349088][ T0] RETBleed: Mitigation: IBRS
[ 2.352056][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 2.354725][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 2.358463][ T0] MDS: Mitigation: Clear CPU buffers
[ 2.360778][ T0] TAA: Mitigation: Clear CPU buffers
[ 2.364724][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 2.368442][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 2.374730][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 2.379081][ T0] Spectre V2 : Enabling IBPB for BPF
[ 2.382903][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 2.384776][ T0] active return thunk: its_return_thunk
[ 2.387304][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 2.394796][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 2.399106][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 2.402061][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 2.404725][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 2.407870][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 2.413633][ T0] ------------[ cut here ]------------
[ 2.414726][ T0] CPA detected W^X violation: 8000000000000023 -> 0000000000000023 range: 0xffffffffa0000000 - 0xffffffffa0000fff PFN 1b200
[ 2.420051][ T0] WARNING: arch/x86/mm/pat/set_memory.c:725 at __change_page_attr_set_clr+0x1d69/0x2820, CPU#0: swapper/0/0
[ 2.424724][ T0] Modules linked in:
[ 2.426194][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.432012][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.434726][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.438167][ 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
[ 2.444724][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.447273][ T0] RAX: ffffffff817a6b66 RBX: 800000001b200023 RCX: ffffffffa0000000
[ 2.450613][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d2980
[ 2.454723][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200
[ 2.458083][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.464726][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.468544][ T0] FS: 0000000000000000(0000) GS:ffff888124cbf000(0000) knlGS:0000000000000000
[ 2.472447][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 2.474724][ T0] CR2: ffff88823ffff000 CR3: 000000000eb48000 CR4: 00000000003506f0
[ 2.477610][ T0] Call Trace:
[ 2.479170][ T0]
[ 2.480744][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.484730][ T0] ? __purge_vmap_area_lazy+0x964/0xb40
[ 2.487667][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.490049][ T0] ? __might_resched+0x71/0x4c0
[ 2.491814][ T0] ? down_read+0x2b9/0x320
[ 2.494727][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.496989][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.499394][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.501146][ T0] set_memory_x+0xd6/0x110
[ 2.503195][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.504733][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.506709][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.509203][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.512390][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.514720][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.517492][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.519525][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.522132][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.524737][ T0] alternative_instructions+0x3a/0x100
[ 2.527254][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.529711][ T0] start_kernel+0x310/0x3e0
[ 2.531883][ T0] x86_64_start_reservations+0x24/0x30
[ 2.534734][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.537222][ T0] common_startup_64+0x13e/0x157
[ 2.539238][ T0]
[ 2.540097][ T0] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 2.543606][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.544706][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
[ 2.544706][ T0] Call Trace:
[ 2.544706][ T0]
[ 2.544706][ T0] vpanic+0x56d/0xa70
[ 2.544706][ T0] ? __pfx__printk+0x10/0x10
[ 2.544706][ T0] ? __pfx_vpanic+0x10/0x10
[ 2.544706][ T0] ? is_bpf_text_address+0x292/0x2b0
[ 2.544706][ T0] ? is_bpf_text_address+0x26/0x2b0
[ 2.544706][ T0] panic+0xc5/0xd0
[ 2.544706][ T0] ? __pfx_panic+0x10/0x10
[ 2.544706][ T0] ? common_startup_64+0x13e/0x157
[ 2.544706][ T0] __warn+0x315/0x4c0
[ 2.544706][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.544706][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.544706][ T0] __report_bug+0x276/0x570
[ 2.544706][ T0] ? __change_page_attr_set_clr+0x1d69/0x2820
[ 2.544706][ T0] ? __pfx___report_bug+0x10/0x10
[ 2.544706][ T0] report_bug_entry+0x19b/0x290
[ 2.544706][ T0] ? __change_page_attr_set_clr+0x1d79/0x2820
[ 2.544706][ T0] ? __change_page_attr_set_clr+0x1d7e/0x2820
[ 2.544706][ T0] handle_bug+0xce/0x200
[ 2.544706][ T0] exc_invalid_op+0x1a/0x50
[ 2.544706][ T0] asm_exc_invalid_op+0x1a/0x20
[ 2.544706][ T0] RIP: 0010:__change_page_attr_set_clr+0x1d79/0x2820
[ 2.544706][ 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
[ 2.544706][ T0] RSP: 0000:ffffffff8ea07820 EFLAGS: 00010293
[ 2.544706][ T0] RAX: ffffffff817a6b66 RBX: 800000001b200023 RCX: ffffffffa0000000
[ 2.544706][ T0] RDX: 0000000000000023 RSI: 8000000000000023 RDI: ffffffff907d2980
[ 2.544706][ T0] RBP: ffffffff8ea07ad0 R08: ffffffffa0000fff R09: 000000000001b200
[ 2.544706][ T0] R10: dffffc0000000000 R11: fffffbfff1d40ef4 R12: 8000000000000000
[ 2.544706][ T0] R13: 0000000000000002 R14: 0000000000000023 R15: 8000000000000002
[ 2.544706][ T0] ? __change_page_attr_set_clr+0x1d56/0x2820
[ 2.544706][ T0] ? __pfx___mutex_unlock_slowpath+0x10/0x10
[ 2.544706][ T0] ? __purge_vmap_area_lazy+0x964/0xb40
[ 2.544706][ T0] ? __pfx___change_page_attr_set_clr+0x10/0x10
[ 2.544706][ T0] ? __might_resched+0x71/0x4c0
[ 2.544706][ T0] ? down_read+0x2b9/0x320
[ 2.544706][ T0] change_page_attr_set_clr+0x398/0x11d0
[ 2.544706][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.544706][ T0] ? trace_kmalloc+0x2a/0xf0
[ 2.544706][ T0] set_memory_x+0xd6/0x110
[ 2.544706][ T0] ? __pfx_set_memory_x+0x10/0x10
[ 2.544706][ T0] apply_retpolines+0x8e9/0x15a0
[ 2.544706][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.544706][ T0] ? __pfx_apply_retpolines+0x10/0x10
[ 2.544706][ T0] ? events_sysfs_show+0xdd/0xf0
[ 2.544706][ T0] ? events_sysfs_show+0xec/0xf0
[ 2.544706][ T0] ? events_sysfs_show+0xe3/0xf0
[ 2.544706][ T0] ? unregister_die_notifier+0x43/0x50
[ 2.544706][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.544706][ T0] alternative_instructions+0x3a/0x100
[ 2.544706][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.544706][ T0] start_kernel+0x310/0x3e0
[ 2.544706][ T0] x86_64_start_reservations+0x24/0x30
[ 2.544706][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.544706][ T0] common_startup_64+0x13e/0x157
[ 2.544706][ T0]
[ 2.544706][ 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-build3519827774=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/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/ccf8WXjy.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