WARNING: locking bug 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: legacy console [ttyS0] enabled
printk: legacy 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.
=============================
[ BUG: Invalid wait context ]
syzkaller #0 Not tainted
-----------------------------
swapper/0/0 is trying to lock:
ffffffff8f088c78 ((init_mm).mmap_lock){....}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
ffffffff8f088c78 ((init_mm).mmap_lock){....}-{4:4}, at: class_mmap_read_lock_constructor include/linux/mmap_lock.h:631 [inline]
ffffffff8f088c78 ((init_mm).mmap_lock){....}-{4:4}, at: cpa_collapse_large_pages arch/x86/mm/pat/set_memory.c:448 [inline]
ffffffff8f088c78 ((init_mm).mmap_lock){....}-{4:4}, at: cpa_flush arch/x86/mm/pat/set_memory.c:494 [inline]
ffffffff8f088c78 ((init_mm).mmap_lock){....}-{4:4}, at: change_page_attr_set_clr+0xc2c/0x1010 arch/x86/mm/pat/set_memory.c:2142
other info that might help us debug this:
context-{5:5}
locks held by swapper/0/0: 1, last CPU#0:
#0: ffffffff8edc2078 (cpa_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:342 [inline]
#0: ffffffff8edc2078 (cpa_lock){+.+.}-{3:3}, at: cpa_collapse_large_pages arch/x86/mm/pat/set_memory.c:421 [inline]
#0: ffffffff8edc2078 (cpa_lock){+.+.}-{3:3}, at: cpa_flush arch/x86/mm/pat/set_memory.c:494 [inline]
#0: ffffffff8edc2078 (cpa_lock){+.+.}-{3:3}, at: change_page_attr_set_clr+0x967/0x1010 arch/x86/mm/pat/set_memory.c:2142
stack backtrace:
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 06/25/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_lock_invalid_wait_context kernel/locking/lockdep.c:4846 [inline]
check_wait_context kernel/locking/lockdep.c:4918 [inline]
__lock_acquire+0xef0/0x2e50 kernel/locking/lockdep.c:5204
lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5906
down_read+0x4a/0x330 kernel/locking/rwsem.c:1574
mmap_read_lock include/linux/mmap_lock.h:600 [inline]
class_mmap_read_lock_constructor include/linux/mmap_lock.h:631 [inline]
cpa_collapse_large_pages arch/x86/mm/pat/set_memory.c:448 [inline]
cpa_flush arch/x86/mm/pat/set_memory.c:494 [inline]
change_page_attr_set_clr+0xc2c/0x1010 arch/x86/mm/pat/set_memory.c:2142
set_memory_rox+0xbe/0x100 arch/x86/mm/pat/set_memory.c:2341
its_pages_protect arch/x86/kernel/alternative.c:168 [inline]
its_fini_core arch/x86/kernel/alternative.c:175 [inline]
alternative_instructions+0x95/0x100 arch/x86/kernel/alternative.c:2264
arch_cpu_finalize_init+0xb2/0x1f0 arch/x86/kernel/cpu/common.c:2633
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
pid_max: default: 32768 minimum: 301
landlock: Up and running.
Yama: becoming mindful.
TOMOYO Linux initialized
AppArmor: AppArmor initialized
LSM support for eBPF active
Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage)
Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc hugepage)
Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
VFS: Finished mounting rootfs on nullfs
Running RCU synchronous self tests
Running RCU synchronous self tests
numa_add_cpu cpu 1 node 0: mask now 0-1
numa_add_cpu cpu 1 node 1: mask now 0-1
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@10.128.10.6" "pwd"]: exit status 255
ssh: connect to host 10.128.10.6 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 84a68ce8-6edb-4758-b7d1-8379f828c31f
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 06/25/2026
[ 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 10717823689 cycles
[ 0.003007][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.009865][ T0] tsc: Detected 2199.998 MHz processor
[ 0.015985][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.018922][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.023076][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.027115][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.035593][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.038812][ T0] Using GB pages for direct mapping
[ 0.044117][ T0] ACPI: Early table checksum verification disabled
[ 0.047498][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.050173][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.053540][ T0] ACPI: FACP 0x00000000BFFFF3B0 000114 (v06 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.058588][ T0] ACPI: DSDT 0x00000000BFFFD5C0 001DED (v02 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.063694][ T0] ACPI: FACS 0x00000000BFFFD580 000040
[ 0.066476][ T0] ACPI: FACS 0x00000000BFFFD580 000040
[ 0.068578][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.072661][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.076834][ T0] ACPI: SSDT 0x00000000BFFFF4D0 000914 (v02 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.081353][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.086726][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff3b0-0xbffff4c3]
[ 0.091870][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd5c0-0xbffff3ac]
[ 0.095905][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd580-0xbfffd5bf]
[ 0.099883][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd580-0xbfffd5bf]
[ 0.104112][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.107459][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.110926][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff4d0-0xbffffde3]
[ 0.115246][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.118900][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.122047][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.125299][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.128338][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.133922][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.138867][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.142255][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.146478][ T0] NODE_DATA(0) allocated [mem 0x13fffb140-0x140000fff]
[ 0.151147][ T0] NODE_DATA(1) allocated [mem 0x23fff7140-0x23fffcfff]
[ 0.468119][ T0] KernelAddressSanitizer initialized (generic)
[ 0.473417][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.475985][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.479714][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.484042][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.487806][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.491356][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.495079][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.499905][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.504369][ T0] CPU topo: Max. logical packages: 1
[ 0.507184][ T0] CPU topo: Max. logical nodes: 1
[ 0.510278][ T0] CPU topo: Num. nodes per package: 1
[ 0.512738][ T0] CPU topo: Max. logical dies: 1
[ 0.515715][ T0] CPU topo: Max. dies per package: 1
[ 0.519000][ T0] CPU topo: Max. threads per core: 2
[ 0.521674][ T0] CPU topo: Num. cores per package: 1
[ 0.525262][ T0] CPU topo: Num. threads per package: 2
[ 0.527876][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.531327][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.535701][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.539592][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.543347][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.546670][ T0] Booting paravirtualized kernel on KVM
[ 0.549840][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.655242][ T0] Zone ranges:
[ 0.657687][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.661055][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.664892][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.668263][ T0] Device empty
[ 0.670433][ T0] Movable zone start for each node
[ 0.673069][ T0] Early memory node ranges
[ 0.674639][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.677016][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.679686][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.682958][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.686311][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.688994][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.732168][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.735042][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.801254][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.865654][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.869999][ T0] percpu: Embedded 71 pages/cpu s251400 r8192 d31224 u1048576
[ 0.873550][ T0] kvm-guest: PV spinlocks enabled
[ 0.875773][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.880706][ 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 \
[ 0.923581][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 0.936013][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 0.940830][ T0] random: crng init done
[ 0.943335][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 0.947706][ T0] software IO TLB: area num 2.
[ 0.978909][ T0] Fallback order for Node 0: 0 1
[ 0.978951][ T0] Fallback order for Node 1: 1 0
[ 0.978965][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 0.985555][ T0] Policy zone: Normal
[ 0.988143][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 0.992824][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 0.996468][ serialport: Connected to syzkaller.us-central1-c.ci-upstream-rust-kasan-gce-test-job-parallel-2 port 1 (session ID: 8a2b0eb5b8811da2e0fb071286438541b048c564337c5d565471958025292354, active connections: 1).
T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 1.005528][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.744706][ T0] **********************************************************
[ 1.747376][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.750228][ T0] ** **
[ 1.753627][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.757298][ T0] ** via the console, logs, and other interfaces. This **
[ 1.760800][ T0] ** might reduce the security of your system. **
[ 1.763706][ T0] ** **
[ 1.766431][ T0] ** If you see this message and you are not debugging **
[ 1.769054][ T0] ** the kernel, report this immediately to your system **
[ 1.771812][ T0] ** administrator! **
[ 1.774181][ T0] ** **
[ 1.776546][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.779438][ T0] ** **
[ 1.782341][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.785424][ T0] **********************************************************
[ 1.791423][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 1.911532][ T0] allocated 167772160 bytes of page_ext
[ 1.913886][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 1.934282][ T0] Node 0, zone DMA32: page owner found early allocated 21120 pages
[ 1.946260][ T0] Node 0, zone Normal: page owner found early allocated 131 pages
[ 1.971085][ T0] Node 1, zone Normal: page owner found early allocated 19847 pages
[ 1.976226][ T0] Kernel/User page tables isolation: enabled
[ 1.981079][ T0] Dynamic Preempt: full
[ 1.984233][ T0] Running RCU self tests
[ 1.986749][ T0] Running RCU synchronous self tests
[ 1.990898][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 1.994902][ T0] rcu: RCU lockdep checking is enabled.
[ 1.996877][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 2.000471][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 2.004551][ T0] rcu: RCU debug extended QS entry/exit.
[ 2.007504][ T0] All grace periods are expedited (rcu_expedited).
[ 2.011124][ T0] Trampoline variant of Tasks RCU enabled.
[ 2.014486][ T0] Tracing variant of Tasks RCU enabled.
[ 2.017420][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 2.022542][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 2.026962][ T0] Running RCU synchronous self tests
[ 2.029073][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 2.190293][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 2.194497][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 2.197550][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 2.203700][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 2.210802][ T0] Console: colour VGA+ 80x25
[ 2.212665][ T0] printk: legacy console [ttyS0] enabled
[ 2.212665][ T0] printk: legacy console [ttyS0] enabled
[ 2.217224][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.217224][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.222628][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 2.226251][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 2.228341][ T0] ... MAX_LOCK_DEPTH: 48
[ 2.230743][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 2.233587][ T0] ... CLASSHASH_SIZE: 4096
[ 2.236673][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 2.239489][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 2.242205][ T0] ... CHAINHASH_SIZE: 524288
[ 2.244515][ T0] memory used by lock dependency info: 106625 kB
[ 2.247736][ T0] memory used for stack traces: 8320 kB
[ 2.250652][ T0] per task-struct memory footprint: 1920 bytes
[ 2.254200][ T0] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl
[ 2.260445][ T0] ACPI: Core revision 20260408
[ 2.264131][ T0] APIC: Switch to symmetric I/O mode setup
[ 2.267382][ T0] x2apic enabled
[ 2.275492][ T0] APIC: Switched APIC routing to: physical x2apic
[ 2.291897][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 2.296118][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 2.302216][ T0] Calibrating delay loop (skipped) preset value.. 4399.99 BogoMIPS (lpj=21999980)
[ 2.312905][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 2.316554][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 2.322284][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 2.328337][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 2.332221][ T0] Spectre V2 : Mitigation: IBRS
[ 2.334340][ T0] RETBleed: Mitigation: IBRS
[ 2.336188][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 2.339305][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 2.342311][ T0] MDS: Mitigation: Clear CPU buffers
[ 2.345291][ T0] TAA: Mitigation: Clear CPU buffers
[ 2.348007][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 2.352219][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 2.356310][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 2.362251][ T0] Spectre V2 : Enabling IBPB for BPF
[ 2.365565][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 2.372339][ T0] active return thunk: its_return_thunk
[ 2.375439][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 2.382433][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 2.386530][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 2.390013][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 2.392226][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 2.395922][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 2.791115][ T0]
[ 2.792190][ T0] =============================
[ 2.792199][ T0] [ BUG: Invalid wait context ]
[ 2.792199][ T0] syzkaller #0 Not tainted
[ 2.792199][ T0] -----------------------------
[ 2.792199][ T0] swapper/0/0 is trying to lock:
[ 2.792199][ T0] ffffffff8f088c78 ((init_mm).mmap_lock){....}-{4:4}, at: change_page_attr_set_clr+0xc2c/0x1010
[ 2.792199][ T0] other info that might help us debug this:
[ 2.792199][ T0] context-{5:5}
[ 2.792199][ T0] locks held by swapper/0/0: 1, last CPU#0:
[ 2.792199][ T0] #0: ffffffff8edc2078 (cpa_lock){+.+.}-{3:3}, at: change_page_attr_set_clr+0x967/0x1010
[ 2.792199][ T0] stack backtrace:
[ 2.792199][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 2.792199][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 2.792199][ T0] Call Trace:
[ 2.792199][ T0]
[ 2.792199][ T0] dump_stack_lvl+0xe8/0x150
[ 2.792199][ T0] __lock_acquire+0xef0/0x2e50
[ 2.792199][ T0] ? __pfx_do_flush_tlb_all+0x10/0x10
[ 2.792199][ T0] ? smp_call_function_many_cond+0x1089/0x15f0
[ 2.792199][ T0] ? lockdep_hardirqs_on+0x7a/0x110
[ 2.792199][ T0] ? __pfx_do_flush_tlb_all+0x10/0x10
[ 2.792199][ T0] ? smp_call_function_many_cond+0x135c/0x15f0
[ 2.792199][ T0] ? __pfx_do_flush_tlb_all+0x10/0x10
[ 2.792199][ T0] lock_acquire+0x115/0x350
[ 2.792199][ T0] ? change_page_attr_set_clr+0xc2c/0x1010
[ 2.792199][ T0] ? __might_resched+0x71/0x4d0
[ 2.792199][ T0] down_read+0x4a/0x330
[ 2.792199][ T0] ? change_page_attr_set_clr+0xc2c/0x1010
[ 2.792199][ T0] change_page_attr_set_clr+0xc2c/0x1010
[ 2.792199][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.792199][ T0] ? apply_returns+0x716/0x790
[ 2.792199][ T0] ? __pfx_apply_returns+0x10/0x10
[ 2.792199][ T0] set_memory_rox+0xbe/0x100
[ 2.792199][ T0] ? __pfx_set_memory_rox+0x10/0x10
[ 2.792199][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.792199][ T0] alternative_instructions+0x95/0x100
[ 2.792199][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.792199][ T0] start_kernel+0x310/0x3e0
[ 2.792199][ T0] x86_64_start_reservations+0x24/0x30
[ 2.792199][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.792199][ T0] common_startup_64+0x13e/0x157
[ 2.792199][ T0]
[ 2.838184][ T0] pid_max: default: 32768 minimum: 301
[ 2.842745][ T0] landlock: Up and running.
[ 2.845147][ T0] Yama: becoming mindful.
[ 2.847878][ T0] TOMOYO Linux initialized
[ 2.851189][ T0] AppArmor: AppArmor initialized
[ 2.853712][ T0] LSM support for eBPF active
[ 2.863809][ T0] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage)
[ 2.871246][ T0] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc hugepage)
[ 2.872565][ T0] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
[ 2.877282][ T0] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
[ 2.883812][ T0] VFS: Finished mounting rootfs on nullfs
[ 2.892994][ T0] Running RCU synchronous self tests
[ 2.896301][ T0] Running RCU synchronous self tests
[ 3.020469][ T1] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0)
[ 3.022199][ T1] Performance Events: unsupported CPU family 6 model 79 no PMU driver, software events only.
[ 3.022465][ T1] signal: max sigframe size: 1776
[ 3.025051][ T1] rcu: Hierarchical SRCU implementation.
[ 3.032225][ T1] rcu: Max phase no-delay instances is 1000.
[ 3.036378][ T1] Timer migration: 1 hierarchy levels; 8 children per group; 0 crossnode level
[ 3.112123][ T1] NMI watchdog: Perf NMI watchdog permanently disabled
[ 3.112959][ T1] smp: Bringing up secondary CPUs ...
[ 3.123169][ T1] smpboot: x86: Booting SMP configuration:
[ 3.126483][ T1] .... node #0, CPUs: #1
[ 0.094650][ T0] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 0.094650][ T0] numa_add_cpu cpu 1 node 1: mask now 0-1
[ 3.132848][ T1] MDS CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/mds.html for more details.
[ 3.142259][ T1] TAA CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html for more details.
[ 3.149673][ T1] MMIO Stale Data CPU bug present and SMT on, data leak possible. See https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/processor_mmio_stale_data.html for more details.
[ 3.152490][ T1] smp: Brought up 2 nodes, 2 CPUs
[ 3.154856][ T1] smpboot: Total of 2 processors activated (8799.99 BogoMIPS)
[ 3.163696][ T1] Memory: 6451704K/8388204K available (178277K kernel code, 30414K rwdata, 43320K rodata, 27108K init, 120568K bss, 1746720K reserved, 0K cma-reserved)
[ 3.174075][ T1] devtmpfs: initialized
[ 3.175565][ T1] x86/mm: Memory block size: 128MB
[ 3.233490][ T1] Running RCU synchronous self tests
[ 3.236130][ T1] Running RCU synchronous self tests
[ 3.236130][ T1] Running RCU Tasks wait API self tests
[ 3.242293][ T1] Running RCU Tasks Trace wait API self tests
[ 3.245479][ T1] posixtimers hash table entries: 1024 (order: 5, 73728 bytes, vmalloc)
[ 3.246328][ T1] futex hash table entries: 256 (32768 bytes on 2 NUMA nodes, total 64 KiB, linear).
[ 3.251126][ T1] xor: automatically using best checksumming function avx
[ 3.254980][ T1] PM: RTC time: 14:09:28, date: 2026-07-21
[ 3.268030][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 3.283185][ T1] audit: initializing netlink subsys (disabled)
[ 3.286579][ T30] audit: type=2000 audit(1784642968.814:1): state=initialized audit_enabled=0 res=1
[ 3.293970][ T1] thermal_sys: Registered thermal governor 'step_wise'
[ 3.294157][ T1] cpuidle: using governor menu
[ 3.299276][ T1] NET: Registered PF_QIPCRTR protocol family
[ 3.302259][ T10] Callback from call_rcu_tasks_trace() invoked.
[ 3.312380][ T1] dca service started, version 1.12.1
[ 3.315424][ T1] PCI: Using configuration type 1 for base access
[ 3.342269][ T1] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
[ 3.342269][ T1] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page
[ 3.346645][ T1] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
[ 3.352273][ T1] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page
[ 3.376037][ T1] raid6: using avx2x2 recovery algorithm
[ 3.380798][ T1] ACPI: Added _OSI(Module Device)
[ 3.382258][ T1] ACPI: Added _OSI(Processor Device)
[ 3.384874][ T1] ACPI: Added _OSI(Processor Aggregator Device)
[ 3.555953][ T1] ACPI: 2 ACPI AML tables successfully acquired and loaded
[ 3.592808][ T1] ACPI: \_SB_: platform _OSC: OS support mask [000e7eee]
[ 3.628400][ T1] ACPI: Interpreter enabled
[ 3.630986][ T1] ACPI: PM: (supports S0 S3 S4 S5)
[ 3.632219][ T1] ACPI: Using IOAPIC for interrupt routing
[ 3.634995][ T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 3.639315][ T1] PCI: Ignoring E820 reservations for host bridge windows
[ 3.650886][ T1] ACPI: Enabled 16 GPEs in block 00 to 0F
[ 3.929228][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 3.932308][ T1] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI HPX-Type3]
[ 3.937217][ T1] acpi PNP0A03:00: _OSC: not requesting OS control; OS requires [ExtendedConfig ASPM ClockPM MSI]
[ 3.942570][ T1] acpi PNP0A03:00: _OSC: platform retains control of PCIe features (AE_ERROR)
[ 3.948048][ T1] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended configuration space under this bridge
[ 3.995315][ T1] PCI host bridge to bus 0000:00
[ 3.998649][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 4.002270][ T1] pci_bus 0000:00: root bus resource [io 0x0d00-0x0fff window]
[ 4.006742][ T1] pci_bus 0000:00: root bus resource [io 0xc000-0xffff window]
[ 4.010600][ T1] pci_bus 0000:00: root bus resource [io 0xa000-0xbfff window]
[ 4.012297][ T1] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 4.022294][ T1] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfefff window]
[ 4.026104][ T1] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 4.029859][ T1] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000 conventional PCI endpoint
[ 4.035269][ T1] pci 0000:00:01.0: [8086:7110] type 00 class 0x060100 conventional PCI endpoint
[ 4.047953][ T1] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000 conventional PCI endpoint
[ 4.062785][ T1] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI
[ 4.071467][ T1] pci 0000:00:03.0: [1af4:1004] type 00 class 0x000000 conventional PCI endpoint
[ 4.082267][ T1] pci 0000:00:03.0: BAR 0 [io 0xc000-0xc03f]
[ 4.086117][ T1] pci 0000:00:03.0: BAR 1 [mem 0xfe800000-0xfe80007f]
[ 4.097065][ T1] pci 0000:00:04.0: [1af4:1000] type 00 class 0x020000 conventional PCI endpoint
[ 4.106932][ T1] pci 0000:00:04.0: BAR 0 [io 0xc040-0xc07f]
[ 4.112279][ T1] pci 0000:00:04.0: BAR 1 [mem 0xfe801000-0xfe80107f]
[ 4.124885][ T1] pci 0000:00:05.0: [1ae0:a002] type 00 class 0x030000 conventional PCI endpoint
[ 4.135492][ T1] pci 0000:00:05.0: BAR 0 [mem 0xfe000000-0xfe7fffff]
[ 4.143228][ T1] pci 0000:00:05.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[ 4.156585][ T1] pci 0000:00:06.0: [1af4:1002] type 00 class 0x00ff00 conventional PCI endpoint
[ 4.166820][ T1] pci 0000:00:06.0: BAR 0 [io 0xc080-0xc09f]
[ 4.177127][ T1] pci 0000:00:07.0: [1af4:1005] type 00 class 0x00ff00 conventional PCI endpoint
[ 4.190401][ T1] pci 0000:00:07.0: BAR 0 [io 0xc0a0-0xc0bf]
[ 4.192264][ T1] pci 0000:00:07.0: BAR 1 [mem 0xfe802000-0xfe80203f]
[ 4.202443][ T1] pci_bus 0000:00: on NUMA node 0
[ 4.237936][ T1] ACPI: PCI: Interrupt link LNKA configured for IRQ 10
[ 4.246493][ T1] ACPI: PCI: Interrupt link LNKB configured for IRQ 10
[ 4.256261][ T1] ACPI: PCI: Interrupt link LNKC configured for IRQ 11
[ 4.269804][ T1] ACPI: PCI: Interrupt link LNKD configured for IRQ 11
[ 4.277098][ T1] ACPI: PCI: Interrupt link LNKS configured for IRQ 9
[ 4.306080][ T1] iommu: Default domain type: Translated
[ 4.309245][ T1] iommu: DMA domain TLB invalidation policy: lazy mode
[ 4.314994][ T1] SCSI subsystem initialized
[ 4.322618][ T1] libata version 3.00 loaded.
[ 4.325414][ T1] ACPI: bus type USB registered
[ 4.325707][ T1] usbcore: registered new interface driver usbfs
[ 4.329605][ T1] usbcore: registered new interface driver hub
[ 4.332522][ T1] usbcore: registered new device driver usb
[ 4.338713][ T1] mc: Linux media interface: v0.10
[ 4.342555][ T1] videodev: Linux video capture interface: v2.00
[ 4.348187][ T1] pps_core: LinuxPPS API ver. 1 registered
[ 4.351833][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti
[ 4.352418][ T1] PTP clock support registered
[ 4.372465][ T1] EDAC MC: Ver: 3.0.0
[ 4.385411][ T1] Advanced Linux Sound Architecture Driver Initialized.
[ 4.395140][ T1] Bluetooth: Core ver 2.22
[ 4.397867][ T1] NET: Registered PF_BLUETOOTH protocol family
[ 4.400897][ T1] Bluetooth: HCI device and connection manager initialized
[ 4.408595][ T1] Bluetooth: HCI socket layer initialized
[ 4.408595][ T1] Bluetooth: L2CAP socket layer initialized
[ 4.412310][ T1] Bluetooth: SCO socket layer initialized
[ 4.414804][ T1] NET: Registered PF_ATMPVC protocol family
[ 4.417874][ T1] NetLabel: Initializing
[ 4.420293][ T1] NetLabel: domain hash size = 128
[ 4.422226][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 4.425420][ T1] NetLabel: unlabeled traffic allowed by default
[ 4.429984][ T1] nfc: nfc_init: NFC Core ver 0.1
[ 4.432782][ T1] NET: Registered PF_NFC protocol family
[ 4.435554][ T1] mctp: management component transport protocol core
[ 4.439022][ T1] NET: Registered PF_MCTP protocol family
[ 4.442612][ T1] PCI: Using ACPI for IRQ routing
[ 4.445048][ T1] PCI: pci_cache_line_size set to 64 bytes
[ 4.448577][ T1] e820: register RAM buffer resource [mem 0x0009fc00-0x0009ffff]
[ 4.452262][ T1] e820: register RAM buffer resource [mem 0xbfffd000-0xbfffffff]
[ 4.457725][ T1] pci 0000:00:05.0: vgaarb: setting as boot VGA device
[ 4.462311][ T1] pci 0000:00:05.0: vgaarb: bridge control possible
[ 4.462311][ T1] pci 0000:00:05.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[ 4.462311][ T1] vgaarb: loaded
[ 4.482207][ T1] clocksource: Switched to clocksource kvm-clock
[ 4.491318][ T1] VFS: Disk quotas dquot_6.6.0
[ 4.493726][ T1] VFS: Dquot-cache hash table entries: 512 (4096 bytes)
[ 4.501513][ T1] netfs: FS-Cache loaded
[ 4.504731][ T1] CacheFiles: Loaded
[ 4.507734][ T1] TOMOYO: 2.6.0
[ 4.509556][ T1] Mandatory Access Control activated.
[ 4.515840][ T1] AppArmor: AppArmor Filesystem Enabled
[ 4.520001][ T1] pnp: PnP ACPI init
[ 4.560715][ T1] pnp: PnP ACPI: found 6 devices
[ 4.618854][ T1] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[ 4.631280][ T1] NET: Registered PF_INET protocol family
[ 4.639733][ T1] IP idents hash table entries: 131072 (order: 8, 1048576 bytes, vmalloc)
[ 4.658825][ T1] tcp_listen_portaddr_hash hash table entries: 4096 (order: 7, 294912 bytes, vmalloc)
[ 4.670021][ T1] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, vmalloc)
[ 4.680665][ T1] TCP established hash table entries: 65536 (order: 7, 524288 bytes, vmalloc)
[ 4.699412][ T1] TCP bind hash table entries: 65536 (order: 12, 9437184 bytes, vmalloc hugepage)
[ 4.715408][ T1] TCP: Hash tables configured (established 65536 bind 65536)
[ 4.725687][ T1] MPTCP token hash table entries: 8192 (order: 8, 720896 bytes, vmalloc)
[ 4.738378][ T1] UDP hash table entries: 4096 (order: 8, 1048576 bytes, vmalloc)
[ 4.748637][ T1] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 4.761216][ T1] RPC: Registered named UNIX socket transport module.
[ 4.768515][ T1] RPC: Registered udp transport module.
[ 4.774606][ T1] RPC: Registered tcp transport module.
[ 4.780547][ T1] RPC: Registered tcp-with-tls transport module.
[ 4.788102][ T1] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 4.799576][ T1] NET: Registered PF_XDP protocol family
[ 4.805735][ T1] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7 window]
[ 4.812894][ T1] pci_bus 0000:00: resource 5 [io 0x0d00-0x0fff window]
[ 4.820533][ T1] pci_bus 0000:00: resource 6 [io 0xc000-0xffff window]
[ 4.828600][ T1] pci_bus 0000:00: resource 7 [io 0xa000-0xbfff window]
[ 4.835956][ T1] pci_bus 0000:00: resource 8 [mem 0x000a0000-0x000bffff window]
[ 4.844579][ T1] pci_bus 0000:00: resource 9 [mem 0xc0000000-0xfebfefff window]
[ 4.855984][ T1] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 4.863815][ T1] PCI: CLS 0 bytes, default 64
[ 4.869210][ T1] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 4.877132][ T1] software IO TLB: mapped [mem 0x00000000b4400000-0x00000000b8400000] (64MB)
[ 4.888102][ T1] ACPI: bus type thunderbolt registered
[ 4.903297][ T60] kworker/u8:4 (60) used greatest stack depth: 27872 bytes left
[ 4.904101][ T1] RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl timer
[ 4.944864][ T1] kvm_amd: CPU 1 isn't AMD or Hygon
[ 4.951234][ T1] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb63109b96, max_idle_ns: 440795265316 ns
[ 4.965570][ T1] clocksource: Switched to clocksource tsc
[ 4.982264][ T71] kworker/u8:1 (71) used greatest stack depth: 27488 bytes left
[ 5.006653][ T1] Initialise system trusted keyrings
[ 5.014294][ T1] workingset: timestamp_bits=40 (anon: 35) max_order=21 bucket_order=0 (anon: 0)
[ 5.031422][ T1] DLM installed
[ 5.041336][ T1] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 5.055213][ T1] NFS: Registering the id_resolver key type
[ 5.061906][ T1] Key type id_resolver registered
[ 5.068568][ T1] Key type id_legacy registered
[ 5.074143][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 5.082519][ T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 5.094470][ T1] smbdirect: subsystem loading...
[ 5.104567][ T1] smbdirect: subsystem loaded
[ 5.125689][ T1] Key type cifs.spnego registered
[ 5.132028][ T1] Key type cifs.idmap registered
[ 5.141159][ T1] ntfs3: Enabled Linux POSIX ACLs support
[ 5.147855][ T1] ntfs3: Read-only LZX/Xpress compression included
[ 5.155971][ T1] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 5.166871][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 5.173528][ T1] QNX4 filesystem 0.2.3 registered.
[ 5.179103][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 5.186758][ T1] fuse: init (API version 7.45)
[ 5.196303][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 5.206125][ T1] orangefs_init: module version upstream loaded
[ 5.214242][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
[ 5.237090][ T1] SGI XFS with ACLs, security attributes, realtime, scrub, repair, quota, no debug enabled
[ 5.255483][ T1] 9p: Installing v9fs 9p2000 file system support
[ 5.263388][ T1] NILFS version 2 loaded
[ 5.267905][ T1] befs: version: 0.9.3
[ 5.272893][ T1] ocfs2: Registered cluster interface o2cb
[ 5.280833][ T1] ocfs2: Registered cluster interface user
[ 5.289020][ T1] OCFS2 User DLM kernel interface loaded
[ 5.314195][ T1] gfs2: GFS2 installed
[ 5.331699][ T1] ceph: loaded (mds proto 32)
[ 5.345000][ T1] NET: Registered PF_ALG protocol family
[ 5.351259][ T1] async_tx: api initialized (async)
[ 5.357277][ T1] Key type asymmetric registered
[ 5.362670][ T1] Asymmetric key parser 'x509' registered
[ 5.369174][ T1] Asymmetric key parser 'pkcs8' registered
[ 5.375663][ T1] Key type pkcs7_test registered
[ 5.382339][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[ 5.394050][ T1] io scheduler mq-deadline registered
[ 5.400204][ T1] io scheduler kyber registered
[ 5.405853][ T1] io scheduler bfq registered
[ 5.412399][ T1] raid6: skipped pq benchmark and selected avx2x4
[ 5.436280][ T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[ 5.448299][ T1] ACPI: button: Power Button [PWRF]
[ 5.456737][ T1] input: Sleep Button as /devices/platform/LNXSLPBN:00/input/input1
[ 5.466430][ T1] ACPI: button: Sleep Button [SLPF]
[ 5.487530][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 5.514416][ T10] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 5.520919][ T10] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 5.557828][ T10] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 5.563680][ T10] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 5.602085][ T10] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 5.608039][ T10] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 5.634149][ T10] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 5.700761][ T228] kworker/u8:3 (228) used greatest stack depth: 27168 bytes left
[ 6.180975][ T1] N_HDLC line discipline registered with maxframe=4096
[ 6.191915][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 6.205395][ T1] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 6.228327][ T1] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 6.250174][ T1] 00:04: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 6.272648][ T1] 00:05: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 6.304382][ T1] Non-volatile memory driver v1.3
[ 6.342173][ T1] usbcore: registered new interface driver xillyusb
[ 6.355000][ T1] ACPI: bus type drm_connector registered
[ 6.368742][ T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[ 6.381964][ T1] ------------[ cut here ]------------
[ 6.389957][ T1] [PLANE:35:plane-0] pixel format with alpha exposed but blend mode not setup
[ 6.390002][ T1] WARNING: drivers/gpu/drm/drm_mode_config.c:873 at drm_mode_config_validate+0x1c6a/0x1e60, CPU#1: swapper/0/1
[ 6.413950][ T1] Modules linked in:
[ 6.417986][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 6.428539][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 6.440056][ T1] RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60
[ 6.447079][ T1] Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 3d fe 9f fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 d9 f9 31 fc 49 bd 00 00 00 00 00 fc ff df
[ 6.469289][ T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[ 6.476012][ T1] RAX: 1ffff11004e60208 RBX: dffffc0000000000 RCX: ffff88801d6fddc0
[ 6.484649][ T1] RDX: ffff888026f33b20 RSI: 0000000000000023 RDI: ffffffff90a4f5e0
[ 6.493076][ T1] RBP: 0000000000000023 R08: ffff88802442cc7b R09: 1ffff1100488598f
[ 6.502490][ T1] R10: dffffc0000000000 R11: ffffed1004885990 R12: dffffc0000000000
[ 6.511445][ T1] R13: ffffffff90a4f5e0 R14: ffff888027301040 R15: ffff888027301030
[ 6.520347][ T1] FS: 0000000000000000(0000) GS:ffff8881249f2000(0000) knlGS:0000000000000000
[ 6.530605][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6.537677][ T1] CR2: 0000000000000000 CR3: 000000000ed46000 CR4: 00000000003526f0
[ 6.546098][ T1] Call Trace:
[ 6.549499][ T1]
[ 6.552592][ T1] ? debugfs_create_file_full+0x3f/0x60
[ 6.559084][ T1] drm_dev_register+0x7c/0xd80
[ 6.564258][ T1] vkms_create+0x40d/0x4f0
[ 6.569092][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.574598][ T1] vkms_init+0x57/0x80
[ 6.579550][ T1] do_one_initcall+0x250/0x870
[ 6.584760][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.589758][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 6.595223][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.600257][ T1] ? __pfx___schedule+0x10/0x10
[ 6.605207][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.611281][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.617176][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.622454][ T1] ? irqentry_exit+0x218/0x8f0
[ 6.627770][ T1] ? trace_irq_disable+0x3b/0x140
[ 6.633035][ T1] ? strlen+0x32/0x70
[ 6.637533][ T1] ? next_arg+0x4a0/0x5e0
[ 6.642383][ T1] ? parameq+0x14d/0x170
[ 6.647198][ T1] ? parse_args+0x9c3/0xad0
[ 6.651995][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.657578][ T1] do_initcall_level+0x10a/0x1a0
[ 6.662915][ T1] ? kernel_init+0x22/0x1d0
[ 6.667762][ T1] do_initcalls+0x59/0xa0
[ 6.672657][ T1] kernel_init_freeable+0x29d/0x3e0
[ 6.678496][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.684003][ T1] kernel_init+0x22/0x1d0
[ 6.688963][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.694339][ T1] ret_from_fork+0x514/0xb70
[ 6.699211][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 6.705620][ T1] ? __switch_to+0xc89/0x1420
[ 6.710526][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.715879][ T1] ret_from_fork_asm+0x1a/0x30
[ 6.721049][ T1]
[ 6.724384][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 6.725855][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 6.725855][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 6.725855][ T1] Call Trace:
[ 6.725855][ T1]
[ 6.725855][ T1] vpanic+0x56c/0xa60
[ 6.725855][ T1] ? __pfx__printk+0x10/0x10
[ 6.725855][ T1] ? __pfx_vpanic+0x10/0x10
[ 6.725855][ T1] ? is_bpf_text_address+0x292/0x2b0
[ 6.725855][ T1] ? is_bpf_text_address+0x26/0x2b0
[ 6.725855][ T1] panic+0xc5/0xd0
[ 6.725855][ T1] ? __pfx_panic+0x10/0x10
[ 6.725855][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 6.725855][ T1] __warn+0x315/0x4c0
[ 6.725855][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 6.725855][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 6.725855][ T1] __report_bug+0x276/0x570
[ 6.725855][ T1] ? drm_mode_config_validate+0x1c6a/0x1e60
[ 6.725855][ T1] ? __pfx___report_bug+0x10/0x10
[ 6.725855][ T1] ? __pfx_inode_set_ctime_to_ts+0x10/0x10
[ 6.725855][ T1] ? ktime_get_coarse_real_ts64_mg+0x59/0x1e0
[ 6.725855][ T1] ? seqcount_lockdep_reader_access+0xea/0x100
[ 6.725855][ T1] ? ktime_get_coarse_real_ts64_mg+0x1c5/0x1e0
[ 6.725855][ T1] report_bug_entry+0x19a/0x290
[ 6.725855][ T1] ? drm_mode_config_validate+0x1cab/0x1e60
[ 6.725855][ T1] ? drm_mode_config_validate+0x1cb0/0x1e60
[ 6.725855][ T1] handle_bug+0xce/0x200
[ 6.725855][ T1] exc_invalid_op+0x1a/0x50
[ 6.725855][ T1] asm_exc_invalid_op+0x1a/0x20
[ 6.725855][ T1] RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60
[ 6.725855][ T1] Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 3d fe 9f fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 d9 f9 31 fc 49 bd 00 00 00 00 00 fc ff df
[ 6.725855][ T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[ 6.725855][ T1] RAX: 1ffff11004e60208 RBX: dffffc0000000000 RCX: ffff88801d6fddc0
[ 6.725855][ T1] RDX: ffff888026f33b20 RSI: 0000000000000023 RDI: ffffffff90a4f5e0
[ 6.725855][ T1] RBP: 0000000000000023 R08: ffff88802442cc7b R09: 1ffff1100488598f
[ 6.725855][ T1] R10: dffffc0000000000 R11: ffffed1004885990 R12: dffffc0000000000
[ 6.725855][ T1] R13: ffffffff90a4f5e0 R14: ffff888027301040 R15: ffff888027301030
[ 6.725855][ T1] ? debugfs_create_file_full+0x3f/0x60
[ 6.725855][ T1] drm_dev_register+0x7c/0xd80
[ 6.725855][ T1] vkms_create+0x40d/0x4f0
[ 6.725855][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.725855][ T1] vkms_init+0x57/0x80
[ 6.725855][ T1] do_one_initcall+0x250/0x870
[ 6.725855][ T1] ? __pfx_vkms_init+0x10/0x10
[ 6.725855][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 6.725855][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.725855][ T1] ? __pfx___schedule+0x10/0x10
[ 6.725855][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.725855][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.725855][ T1] ? trace_irq_enable+0x3b/0x140
[ 6.725855][ T1] ? irqentry_exit+0x218/0x8f0
[ 6.725855][ T1] ? trace_irq_disable+0x3b/0x140
[ 6.725855][ T1] ? strlen+0x32/0x70
[ 6.725855][ T1] ? next_arg+0x4a0/0x5e0
[ 6.725855][ T1] ? parameq+0x14d/0x170
[ 6.725855][ T1] ? parse_args+0x9c3/0xad0
[ 6.725855][ T1] ? rcu_is_watching+0x15/0xb0
[ 6.725855][ T1] do_initcall_level+0x10a/0x1a0
[ 6.725855][ T1] ? kernel_init+0x22/0x1d0
[ 6.725855][ T1] do_initcalls+0x59/0xa0
[ 6.725855][ T1] kernel_init_freeable+0x29d/0x3e0
[ 6.725855][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.725855][ T1] kernel_init+0x22/0x1d0
[ 6.725855][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.725855][ T1] ret_from_fork+0x514/0xb70
[ 6.725855][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 6.725855][ T1] ? __switch_to+0xc89/0x1420
[ 6.725855][ T1] ? __pfx_kernel_init+0x10/0x10
[ 6.725855][ T1] ret_from_fork_asm+0x1a/0x30
[ 6.725855][ T1]
[ 6.725855][ T1] Kernel Offset: disabled
[ 6.725855][ T1] 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-build2803433996=/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 7f27c57aff
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=7f27c57affd8bddc0f76bd42d53ecfc583fc548b -X github.com/google/syzkaller/prog.gitRevisionDate=20260716-202746" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=7f27c57affd8bddc0f76bd42d53ecfc583fc548b -X github.com/google/syzkaller/prog.gitRevisionDate=20260716-202746" ./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=7f27c57affd8bddc0f76bd42d53ecfc583fc548b -X github.com/google/syzkaller/prog.gitRevisionDate=20260716-202746" -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=\"7f27c57affd8bddc0f76bd42d53ecfc583fc548b\"
/usr/bin/ld: /tmp/cc4dEmS4.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