WARNING: locking bug in change_page_attr_set_clr
rcu: srcu_init: Setting srcu_struct sizes based on contention.
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 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
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: 0x1fb6c613963, max_idle_ns: 440795245426 ns
Calibrating delay loop (skipped) preset value.. 4400.31 BogoMIPS (lpj=22001560)
numa_add_cpu cpu 0 node 0: mask now 0
numa_add_cpu cpu 0 node 1: mask now 0
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:
ffffffff8e4f2830 ((init_mm).mmap_lock){....}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
ffffffff8e4f2830 ((init_mm).mmap_lock){....}-{4:4}, at: class_mmap_read_lock_constructor include/linux/mmap_lock.h:631 [inline]
ffffffff8e4f2830 ((init_mm).mmap_lock){....}-{4:4}, at: cpa_collapse_large_pages arch/x86/mm/pat/set_memory.c:448 [inline]
ffffffff8e4f2830 ((init_mm).mmap_lock){....}-{4:4}, at: cpa_flush arch/x86/mm/pat/set_memory.c:494 [inline]
ffffffff8e4f2830 ((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: 2, last CPU#0:
#0: ffffffff8e22c358 (cpa_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#0: ffffffff8e22c358 (cpa_lock){+.+.}-{3:3}, at: cpa_collapse_large_pages arch/x86/mm/pat/set_memory.c:421 [inline]
#0: ffffffff8e22c358 (cpa_lock){+.+.}-{3:3}, at: cpa_flush arch/x86/mm/pat/set_memory.c:494 [inline]
#0: ffffffff8e22c358 (cpa_lock){+.+.}-{3:3}, at: change_page_attr_set_clr+0x967/0x1010 arch/x86/mm/pat/set_memory.c:2142
#1: ffffffff8e3c3840 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#1: ffffffff8e3c3840 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#1: ffffffff8e3c3840 (rcu_read_lock){....}-{1:3}, at: __rt_spin_lock kernel/locking/spinlock_rt.c:50 [inline]
#1: ffffffff8e3c3840 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400 kernel/locking/spinlock_rt.c:57
stack backtrace:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(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+0xef0/0x2e40 kernel/locking/lockdep.c:5204
lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5906
down_read+0x97/0x200 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
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@10.128.1.61" "pwd"]: exit status 255
ssh: connect to host 10.128.1.61 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.
serialport: Connected to syzkaller.us-central1-c.ci-upstream-rust-kasan-gce-test-job-1 port 1 (session ID: 5ec7b3aece81fb01fa34e64b7e08fa7fc4ce562b03ae91dc27468693e232e661, active connections: 1).
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 038a131a-73bc-b578-fa2d-d5660fd1393f
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_RT 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
[ 0.000006][ T0] kvm-clock: using sched offset of 9712270629 cycles
[ 0.000014][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.000035][ T0] tsc: Detected 2200.156 MHz processor
[ 0.003935][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.003990][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.004002][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.004070][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.009066][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.009095][ T0] Using GB pages for direct mapping
[ 0.012892][ T0] ACPI: Early table checksum verification disabled
[ 0.012919][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.012937][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.012960][ T0] ACPI: FACP 0x00000000BFFFF3B0 000114 (v06 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.012984][ T0] ACPI: DSDT 0x00000000BFFFD5C0 001DED (v02 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.013002][ T0] ACPI: FACS 0x00000000BFFFD580 000040
[ 0.013016][ T0] ACPI: FACS 0x00000000BFFFD580 000040
[ 0.013031][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.013049][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.013068][ T0] ACPI: SSDT 0x00000000BFFFF4D0 000914 (v02 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.013086][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.013102][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff3b0-0xbffff4c3]
[ 0.013110][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd5c0-0xbffff3ac]
[ 0.013117][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd580-0xbfffd5bf]
[ 0.013124][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd580-0xbfffd5bf]
[ 0.013131][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.013138][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.013145][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff4d0-0xbffffde3]
[ 0.013152][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.013293][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.013304][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.013313][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.013325][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.013338][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.013361][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.013370][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.013454][ T0] NODE_DATA(0) allocated [mem 0x13fffac80-0x140000fff]
[ 0.014271][ T0] NODE_DATA(1) allocated [mem 0x23fff6c80-0x23fffcfff]
[ 0.316307][ T0] KernelAddressSanitizer initialized (generic)
[ 0.316815][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.316851][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.316963][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.316979][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.316995][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.317004][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.317012][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.317033][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.317044][ T0] CPU topo: Max. logical packages: 1
[ 0.317049][ T0] CPU topo: Max. logical nodes: 1
[ 0.317053][ T0] CPU topo: Num. nodes per package: 1
[ 0.317062][ T0] CPU topo: Max. logical dies: 1
[ 0.317066][ T0] CPU topo: Max. dies per package: 1
[ 0.317080][ T0] CPU topo: Max. threads per core: 2
[ 0.317084][ T0] CPU topo: Num. cores per package: 1
[ 0.317089][ T0] CPU topo: Num. threads per package: 2
[ 0.317093][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.317276][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.317287][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.317296][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.317319][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.317326][ T0] Booting paravirtualized kernel on KVM
[ 0.317338][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.411270][ T0] Zone ranges:
[ 0.411281][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.411293][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.411302][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.411310][ T0] Device empty
[ 0.411315][ T0] Movable zone start for each node
[ 0.411318][ T0] Early memory node ranges
[ 0.411322][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.411329][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.411335][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.411342][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.411350][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.411371][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.450420][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.450692][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.518908][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.587635][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.588361][ T0] percpu: Embedded 72 pages/cpu s254024 r8192 d32696 u1048576
[ 0.588544][ T0] kvm-guest: PV spinlocks enabled
[ 0.588555][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.588576][ 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 \
[ 0.588606][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 0.593966][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 0.594085][ T0] random: crng init done
[ 0.594090][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 0.594298][ T0] software IO TLB: area num 2.
[ 0.622375][ T0] Fallback order for Node 0: 0 1
[ 0.622397][ T0] Fallback order for Node 1: 1 0
[ 0.622412][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 0.622421][ T0] Policy zone: Normal
[ 0.623111][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 0.623121][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 0.623132][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 0.628059][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.376769][ T0] **********************************************************
[ 1.376780][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.376784][ T0] ** **
[ 1.376789][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.376793][ T0] ** via the console, logs, and other interfaces. This **
[ 1.376797][ T0] ** might reduce the security of your system. **
[ 1.376801][ T0] ** **
[ 1.376805][ T0] ** If you see this message and you are not debugging **
[ 1.376809][ T0] ** the kernel, report this immediately to your system **
[ 1.376813][ T0] ** administrator! **
[ 1.376816][ T0] ** **
[ 1.376820][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.376824][ T0] ** **
[ 1.376828][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.376832][ T0] **********************************************************
[ 1.380119][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=2
[ 1.511203][ T0] allocated 167772160 bytes of page_ext
[ 1.511254][ T0] Node 0, zone DMA: page owner found early allocated 0 pages
[ 1.525413][ T0] Node 0, zone DMA32: page owner found early allocated 21120 pages
[ 1.530467][ T0] Node 0, zone Normal: page owner found early allocated 130 pages
[ 1.541831][ T0] Node 1, zone Normal: page owner found early allocated 19848 pages
[ 1.542373][ T0] Kernel/User page tables isolation: enabled
[ 1.544980][ T0] Dynamic Preempt: full
[ 1.546232][ T0] Running RCU self tests
[ 1.546239][ T0] Running RCU synchronous self tests
[ 1.546244][ T0] rcu: Preemptible hierarchical RCU implementation.
[ 1.546248][ T0] rcu: RCU lockdep checking is enabled.
[ 1.546252][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2.
[ 1.546259][ T0] rcu: RCU priority boosting: priority 1 delay 500 ms.
[ 1.546266][ T0] rcu: RCU callback double-/use-after-free debug is enabled.
[ 1.546271][ T0] rcu: RCU_SOFTIRQ processing moved to rcuc kthreads.
[ 1.546274][ T0] rcu: RCU debug extended QS entry/exit.
[ 1.546278][ T0] No expedited grace period (rcu_normal_after_boot).
[ 1.546282][ T0] Trampoline variant of Tasks RCU enabled.
[ 1.546286][ T0] Tracing variant of Tasks RCU enabled.
[ 1.546292][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[ 1.546297][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[ 1.546481][ T0] Running RCU synchronous self tests
[ 1.546517][ T0] RCU Tasks: Setting shift to 1 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=2.
[ 1.738580][ T0] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16
[ 1.739752][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 1.739793][ T0] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 1.740563][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88823be00000-0xffff88823c000000
[ 1.742147][ T0] Console: colour VGA+ 80x25
[ 2.073545][ T0] printk: legacy console [ttyS0] enabled
[ 2.073558][ T0] printk: legacy bootconsole [earlyser0] disabled
[ 2.073650][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
[ 2.073655][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8
[ 2.073673][ T0] ... MAX_LOCK_DEPTH: 48
[ 2.073678][ T0] ... MAX_LOCKDEP_KEYS: 8192
[ 2.073682][ T0] ... CLASSHASH_SIZE: 4096
[ 2.073687][ T0] ... MAX_LOCKDEP_ENTRIES: 1048576
[ 2.073691][ T0] ... MAX_LOCKDEP_CHAINS: 1048576
[ 2.073695][ T0] ... CHAINHASH_SIZE: 524288
[ 2.073700][ T0] memory used by lock dependency info: 106625 kB
[ 2.073705][ T0] memory used for stack traces: 8320 kB
[ 2.073709][ T0] per task-struct memory footprint: 1920 bytes
[ 2.074117][ T0] ACPI: Core revision 20260408
[ 2.075589][ T0] APIC: Switch to symmetric I/O mode setup
[ 2.076118][ T0] x2apic enabled
[ 2.083399][ T0] APIC: Switched APIC routing to: physical x2apic
[ 2.093255][ T0] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1
[ 2.094329][ T0] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x1fb6c613963, max_idle_ns: 440795245426 ns
[ 2.094385][ T0] Calibrating delay loop (skipped) preset value.. 4400.31 BogoMIPS (lpj=22001560)
[ 2.095172][ T0] numa_add_cpu cpu 0 node 0: mask now 0
[ 2.095184][ T0] numa_add_cpu cpu 0 node 1: mask now 0
[ 2.095195][ T0] Last level iTLB entries: 4KB 64, 2MB 8, 4MB 8
[ 2.095202][ T0] Last level dTLB entries: 4KB 64, 2MB 32, 4MB 32, 1GB 4
[ 2.095270][ T0] mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto
[ 2.095289][ T0] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl
[ 2.095296][ T0] Spectre V2 : Mitigation: IBRS
[ 2.095301][ T0] RETBleed: Mitigation: IBRS
[ 2.095304][ T0] ITS: Mitigation: Aligned branch/return thunks
[ 2.095308][ T0] Spectre V2 : User space: Mitigation: STIBP via prctl
[ 2.095313][ T0] MDS: Mitigation: Clear CPU buffers
[ 2.095317][ T0] TAA: Mitigation: Clear CPU buffers
[ 2.104384][ T0] MMIO Stale Data: Vulnerable: Clear CPU buffers attempted, no microcode
[ 2.104396][ T0] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization
[ 2.104404][ T0] Spectre V2 : Spectre v2 / SpectreRSB: Filling RSB on context switch and VMEXIT
[ 2.104435][ T0] Spectre V2 : Enabling IBPB for BPF
[ 2.104449][ T0] Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier
[ 2.104493][ T0] active return thunk: its_return_thunk
[ 2.104510][ T0] Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit
[ 2.104567][ T0] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
[ 2.104574][ T0] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
[ 2.104579][ T0] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
[ 2.104585][ T0] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256
[ 2.104592][ T0] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format.
[ 2.358150][ T0]
[ 2.358159][ T0] =============================
[ 2.358162][ T0] [ BUG: Invalid wait context ]
[ 2.358166][ T0] syzkaller #0 Not tainted
[ 2.358172][ T0] -----------------------------
[ 2.358174][ T0] swapper/0/0 is trying to lock:
[ 2.358180][ T0] ffffffff8e4f2830 ((init_mm).mmap_lock){....}-{4:4}, at: change_page_attr_set_clr+0xc2c/0x1010
[ 2.358211][ T0] other info that might help us debug this:
[ 2.358214][ T0] context-{5:5}
[ 2.358218][ T0] locks held by swapper/0/0: 2, last CPU#0:
[ 2.358225][ T0] #0: ffffffff8e22c358 (cpa_lock){+.+.}-{3:3}, at: change_page_attr_set_clr+0x967/0x1010
[ 2.358251][ T0] #1: ffffffff8e3c3840 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400
[ 2.358277][ T0] stack backtrace:
[ 2.358283][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
[ 2.358294][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 2.358299][ T0] Call Trace:
[ 2.358305][ T0]
[ 2.358311][ T0] dump_stack_lvl+0xe8/0x150
[ 2.358324][ T0] __lock_acquire+0xef0/0x2e40
[ 2.358333][ T0] ? __asan_memset+0x22/0x50
[ 2.358346][ T0] ? native_flush_tlb_global+0x84/0x120
[ 2.358356][ T0] ? __pfx_native_flush_tlb_global+0x10/0x10
[ 2.358367][ T0] ? __pfx_do_flush_tlb_all+0x10/0x10
[ 2.358377][ T0] ? smp_call_function_many_cond+0x10c5/0x1650
[ 2.358387][ T0] ? lockdep_hardirqs_on+0x7a/0x110
[ 2.358396][ T0] ? __pfx_do_flush_tlb_all+0x10/0x10
[ 2.358407][ T0] lock_acquire+0x115/0x350
[ 2.358415][ T0] ? change_page_attr_set_clr+0xc2c/0x1010
[ 2.358427][ T0] ? __might_resched+0x22/0x480
[ 2.358438][ T0] down_read+0x97/0x200
[ 2.358448][ T0] ? change_page_attr_set_clr+0xc2c/0x1010
[ 2.358459][ T0] ? __pfx_down_read+0x10/0x10
[ 2.358468][ T0] ? rt_spin_unlock+0x163/0x200
[ 2.358481][ T0] change_page_attr_set_clr+0xc2c/0x1010
[ 2.358494][ T0] ? __pfx_change_page_attr_set_clr+0x10/0x10
[ 2.358506][ T0] ? apply_returns+0x716/0x790
[ 2.358516][ T0] ? __pfx_apply_returns+0x10/0x10
[ 2.358526][ T0] set_memory_rox+0xbe/0x100
[ 2.358539][ T0] ? __pfx_set_memory_rox+0x10/0x10
[ 2.358550][ T0] ? __pfx_int3_selftest+0x10/0x10
[ 2.358566][ T0] alternative_instructions+0x95/0x100
[ 2.358581][ T0] arch_cpu_finalize_init+0xb2/0x1f0
[ 2.358592][ T0] start_kernel+0x310/0x3e0
[ 2.358604][ T0] x86_64_start_reservations+0x24/0x30
[ 2.358613][ T0] x86_64_start_kernel+0x137/0x1b0
[ 2.358622][ T0] common_startup_64+0x13e/0x157
[ 2.358635][ T0]
[ 2.380546][ T0] pid_max: default: 32768 minimum: 301
[ 2.381563][ T0] landlock: Up and running.
[ 2.381570][ T0] Yama: becoming mindful.
[ 2.381785][ T0] TOMOYO Linux initialized
[ 2.383049][ T0] LSM support for eBPF active
[ 2.390144][ T0] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, vmalloc hugepage)
[ 2.392628][ T0] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, vmalloc hugepage)
[ 2.392928][ T0] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
[ 2.393043][ T0] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, vmalloc)
[ 2.394515][ T0] VFS: Finished mounting rootfs on nullfs
[ 2.397313][ T0] Running RCU synchronous self tests
[ 2.397323][ T0] Running RCU synchronous self tests
[ 2.518027][ T1] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.20GHz (family: 0x6, model: 0x4f, stepping: 0x0)
[ 2.520873][ T1] Performance Events: unsupported CPU family 6 model 79 no PMU driver, software events only.
[ 2.520996][ T1] signal: max sigframe size: 1776
[ 2.524433][ T1] rcu: Hierarchical SRCU implementation.
[ 2.524442][ T1] rcu: Max phase no-delay instances is 1000.
[ 2.525876][ T1] Timer migration: 1 hierarchy levels; 8 children per group; 0 crossnode level
[ 2.706825][ T1] NMI watchdog: Perf NMI watchdog permanently disabled
[ 2.707402][ T1] smp: Bringing up secondary CPUs ...
[ 2.709104][ T1] smpboot: x86: Booting SMP configuration:
[ 2.709110][ T1] .... node #0, CPUs: #1
[ 0.354582][ T0] numa_add_cpu cpu 1 node 0: mask now 0-1
[ 0.354582][ T0] numa_add_cpu cpu 1 node 1: mask now 0-1
[ 2.714526][ 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.
[ 2.714539][ 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.
[ 2.714548][ 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.
[ 2.714618][ T1] smp: Brought up 2 nodes, 2 CPUs
[ 2.714630][ T1] smpboot: Total of 2 processors activated (8800.62 BogoMIPS)
[ 2.715529][ T1] Memory: 6470216K/8388204K available (169260K kernel code, 29863K rwdata, 41412K rodata, 25776K init, 121052K bss, 1729996K reserved, 0K cma-reserved)
[ 2.716981][ T1] devtmpfs: initialized
[ 2.717261][ T1] x86/mm: Memory block size: 128MB
[ 2.768582][ T1] Running RCU synchronous self tests
[ 2.768607][ T1] Running RCU synchronous self tests
[ 2.768643][ T1] Running RCU Tasks wait API self tests
[ 2.768643][ T1] Running RCU Tasks Trace wait API self tests
[ 2.768643][ T36] Callback from call_rcu_tasks() invoked.
[ 2.781259][ T1] posixtimers hash table entries: 1024 (order: 6, 139264 bytes, vmalloc)
[ 2.781259][ T1] futex hash table entries: 256 (49152 bytes on 2 NUMA nodes, total 96 KiB, linear).
[ 2.781259][ T1] xor: automatically using best checksumming function avx
[ 2.785896][ T1] PM: RTC time: 02:12:18, date: 2026-07-17
[ 2.795238][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 2.801358][ T1] audit: initializing netlink subsys (disabled)
[ 2.801650][ T37] audit: type=2000 audit(1784254337.864:1): state=initialized audit_enabled=0 res=1
[ 2.804413][ T1] thermal_sys: Registered thermal governor 'step_wise'
[ 2.804449][ T1] cpuidle: using governor menu
[ 2.804911][ T1] NET: Registered PF_QIPCRTR protocol family
[ 2.814458][ T10] Callback from call_rcu_tasks_trace() invoked.
[ 2.811316][ T1] dca service started, version 1.12.1
[ 2.811579][ T1] PCI: Using configuration type 1 for base access
[ 2.835051][ T1] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
[ 2.835067][ T1] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page
[ 2.835080][ T1] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
[ 2.835089][ T1] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page
[ 2.867781][ T1] raid6: using avx2x2 recovery algorithm
[ 2.869848][ T1] ACPI: Added _OSI(Module Device)
[ 2.869848][ T1] ACPI: Added _OSI(Processor Device)
[ 2.869848][ T1] ACPI: Added _OSI(Processor Aggregator Device)
[ 3.044001][ T1] ACPI: 2 ACPI AML tables successfully acquired and loaded
[ 3.070037][ T1] ACPI: \_SB_: platform _OSC: OS support mask [000e7eee]
[ 3.106695][ T1] ACPI: Interpreter enabled
[ 3.107159][ T1] ACPI: PM: (supports S0 S3 S4 S5)
[ 3.107171][ T1] ACPI: Using IOAPIC for interrupt routing
[ 3.107551][ T1] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 3.107561][ T1] PCI: Ignoring E820 reservations for host bridge windows
[ 3.116391][ T1] ACPI: Enabled 16 GPEs in block 00 to 0F
[ 3.379355][ T1] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 3.379457][ T1] acpi PNP0A03:00: _OSC: OS supports [ASPM ClockPM Segments MSI HPX-Type3]
[ 3.379480][ T1] acpi PNP0A03:00: _OSC: not requesting OS control; OS requires [ExtendedConfig ASPM ClockPM MSI]
[ 3.379750][ T1] acpi PNP0A03:00: _OSC: platform retains control of PCIe features (AE_ERROR)
[ 3.379969][ T1] acpi PNP0A03:00: fail to add MMCONFIG information, can't access extended configuration space under this bridge
[ 3.415870][ T1] PCI host bridge to bus 0000:00
[ 3.416172][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0x0cf7 window]
[ 3.416203][ T1] pci_bus 0000:00: root bus resource [io 0x0d00-0x0fff window]
[ 3.416229][ T1] pci_bus 0000:00: root bus resource [io 0xc000-0xffff window]
[ 3.416256][ T1] pci_bus 0000:00: root bus resource [io 0xa000-0xbfff window]
[ 3.416282][ T1] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[ 3.416309][ T1] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xfebfefff window]
[ 3.416342][ T1] pci_bus 0000:00: root bus resource [bus 00-ff]
[ 3.416600][ T1] pci 0000:00:00.0: [8086:1237] type 00 class 0x060000 conventional PCI endpoint
[ 3.419379][ T1] pci 0000:00:01.0: [8086:7110] type 00 class 0x060100 conventional PCI endpoint
[ 3.425072][ T1] pci 0000:00:01.3: [8086:7113] type 00 class 0x068000 conventional PCI endpoint
[ 3.430934][ T1] pci 0000:00:01.3: quirk: [io 0xb000-0xb03f] claimed by PIIX4 ACPI
[ 3.445863][ T1] pci 0000:00:03.0: [1af4:1004] type 00 class 0x000000 conventional PCI endpoint
[ 3.452650][ T1] pci 0000:00:03.0: BAR 0 [io 0xc000-0xc03f]
[ 3.452690][ T1] pci 0000:00:03.0: BAR 1 [mem 0xfe800000-0xfe80007f]
[ 3.467458][ T1] pci 0000:00:04.0: [1af4:1000] type 00 class 0x020000 conventional PCI endpoint
[ 3.473255][ T1] pci 0000:00:04.0: BAR 0 [io 0xc040-0xc07f]
[ 3.473295][ T1] pci 0000:00:04.0: BAR 1 [mem 0xfe801000-0xfe80107f]
[ 3.486631][ T1] pci 0000:00:05.0: [1ae0:a002] type 00 class 0x030000 conventional PCI endpoint
[ 3.504477][ T1] pci 0000:00:05.0: BAR 0 [mem 0xfe000000-0xfe7fffff]
[ 3.505434][ T1] pci 0000:00:05.0: Video device with shadowed ROM at [mem 0x000c0000-0x000dffff]
[ 3.508548][ T1] pci 0000:00:06.0: [1af4:1002] type 00 class 0x00ff00 conventional PCI endpoint
[ 3.513547][ T1] pci 0000:00:06.0: BAR 0 [io 0xc080-0xc09f]
[ 3.526224][ T1] pci 0000:00:07.0: [1af4:1005] type 00 class 0x00ff00 conventional PCI endpoint
[ 3.531515][ T1] pci 0000:00:07.0: BAR 0 [io 0xc0a0-0xc0bf]
[ 3.531551][ T1] pci 0000:00:07.0: BAR 1 [mem 0xfe802000-0xfe80203f]
[ 3.544785][ T1] pci_bus 0000:00: on NUMA node 0
[ 3.573102][ T1] ACPI: PCI: Interrupt link LNKA configured for IRQ 10
[ 3.586902][ T1] ACPI: PCI: Interrupt link LNKB configured for IRQ 10
[ 3.592064][ T1] ACPI: PCI: Interrupt link LNKC configured for IRQ 11
[ 3.599772][ T1] ACPI: PCI: Interrupt link LNKD configured for IRQ 11
[ 3.602910][ T1] ACPI: PCI: Interrupt link LNKS configured for IRQ 9
[ 3.634465][ T1] iommu: Default domain type: Translated
[ 3.634484][ T1] iommu: DMA domain TLB invalidation policy: lazy mode
[ 3.658933][ T1] SCSI subsystem initialized
[ 3.659795][ T1] libata version 3.00 loaded.
[ 3.661154][ T1] ACPI: bus type USB registered
[ 3.662134][ T1] usbcore: registered new interface driver usbfs
[ 3.662466][ T1] usbcore: registered new interface driver hub
[ 3.662727][ T1] usbcore: registered new device driver usb
[ 3.676004][ T1] mc: Linux media interface: v0.10
[ 3.676313][ T1] videodev: Linux video capture interface: v2.00
[ 3.677238][ T1] pps_core: LinuxPPS API ver. 1 registered
[ 3.677246][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti
[ 3.677380][ T1] PTP clock support registered
[ 3.693482][ T1] EDAC MC: Ver: 3.0.0
[ 3.710414][ T1] Advanced Linux Sound Architecture Driver Initialized.
[ 3.718544][ T1] Bluetooth: Core ver 2.22
[ 3.718710][ T1] NET: Registered PF_BLUETOOTH protocol family
[ 3.718716][ T1] Bluetooth: HCI device and connection manager initialized
[ 3.718747][ T1] Bluetooth: HCI socket layer initialized
[ 3.718760][ T1] Bluetooth: L2CAP socket layer initialized
[ 3.718806][ T1] Bluetooth: SCO socket layer initialized
[ 3.718847][ T1] NET: Registered PF_ATMPVC protocol family
[ 3.719068][ T1] NetLabel: Initializing
[ 3.719072][ T1] NetLabel: domain hash size = 128
[ 3.719076][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 3.719338][ T1] NetLabel: unlabeled traffic allowed by default
[ 3.725510][ T1] nfc: nfc_init: NFC Core ver 0.1
[ 3.725839][ T1] NET: Registered PF_NFC protocol family
[ 3.725944][ T1] mctp: management component transport protocol core
[ 3.725951][ T1] NET: Registered PF_MCTP protocol family
[ 3.726387][ T1] PCI: Using ACPI for IRQ routing
[ 3.726395][ T1] PCI: pci_cache_line_size set to 64 bytes
[ 3.726678][ T1] e820: register RAM buffer resource [mem 0x0009fc00-0x0009ffff]
[ 3.726721][ T1] e820: register RAM buffer resource [mem 0xbfffd000-0xbfffffff]
[ 3.734921][ T1] pci 0000:00:05.0: vgaarb: setting as boot VGA device
[ 3.734940][ T1] pci 0000:00:05.0: vgaarb: bridge control possible
[ 3.734951][ T1] pci 0000:00:05.0: vgaarb: VGA device added: decodes=io+mem,owns=io+mem,locks=none
[ 3.734974][ T1] vgaarb: loaded
[ 3.744358][ T1] clocksource: Switched to clocksource kvm-clock
[ 3.744358][ T1] VFS: Disk quotas dquot_6.6.0
[ 3.744358][ T1] VFS: Dquot-cache hash table entries: 512 (4096 bytes)
[ 3.755165][ T1] netfs: FS-Cache loaded
[ 3.765131][ T1] CacheFiles: Loaded
[ 3.766126][ T1] TOMOYO: 2.6.0
[ 3.766136][ T1] Mandatory Access Control activated.
[ 3.766951][ T1] pnp: PnP ACPI init
[ 3.811762][ T1] pnp: PnP ACPI: found 6 devices
[ 3.884278][ T1] clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
[ 3.889259][ T1] NET: Registered PF_INET protocol family
[ 3.890574][ T1] IP idents hash table entries: 131072 (order: 8, 1048576 bytes, vmalloc)
[ 3.903695][ T1] tcp_listen_portaddr_hash hash table entries: 4096 (order: 8, 557056 bytes, vmalloc)
[ 3.904411][ T1] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, vmalloc)
[ 3.910848][ T1] TCP established hash table entries: 65536 (order: 7, 524288 bytes, vmalloc)
[ 3.929687][ T1] TCP bind hash table entries: 65536 (order: 13, 17825792 bytes, vmalloc hugepage)
[ 3.943512][ T1] TCP: Hash tables configured (established 65536 bind 65536)
[ 3.948146][ T1] MPTCP token hash table entries: 8192 (order: 9, 1245184 bytes, vmalloc)
[ 3.950700][ T1] UDP hash table entries: 4096 (order: 9, 1835008 bytes, vmalloc)
[ 3.952963][ T1] NET: Registered PF_UNIX/PF_LOCAL protocol family
[ 3.963215][ T1] RPC: Registered named UNIX socket transport module.
[ 3.963231][ T1] RPC: Registered udp transport module.
[ 3.963239][ T1] RPC: Registered tcp transport module.
[ 3.963246][ T1] RPC: Registered tcp-with-tls transport module.
[ 3.963254][ T1] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 3.974873][ T1] NET: Registered PF_XDP protocol family
[ 3.975065][ T1] pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7 window]
[ 3.975085][ T1] pci_bus 0000:00: resource 5 [io 0x0d00-0x0fff window]
[ 3.975100][ T1] pci_bus 0000:00: resource 6 [io 0xc000-0xffff window]
[ 3.975115][ T1] pci_bus 0000:00: resource 7 [io 0xa000-0xbfff window]
[ 3.975130][ T1] pci_bus 0000:00: resource 8 [mem 0x000a0000-0x000bffff window]
[ 3.975146][ T1] pci_bus 0000:00: resource 9 [mem 0xc0000000-0xfebfefff window]
[ 3.976443][ T1] pci 0000:00:00.0: Limiting direct PCI/PCI transfers
[ 3.976789][ T1] PCI: CLS 0 bytes, default 64
[ 3.976988][ T1] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[ 3.977000][ T1] software IO TLB: mapped [mem 0x00000000b4600000-0x00000000b8600000] (64MB)
[ 3.977734][ T1] ACPI: bus type thunderbolt registered
[ 3.983291][ T69] kworker/u8:2 (69) used greatest stack depth: 27936 bytes left
[ 3.984394][ T1] RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl timer
[ 4.027682][ T1] kvm_amd: CPU 1 isn't AMD or Hygon
[ 4.027706][ T1] clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x1fb6c613963, max_idle_ns: 440795245426 ns
[ 4.028192][ T1] clocksource: Switched to clocksource tsc
[ 4.029065][ T71] kworker/u8:2 (71) used greatest stack depth: 27584 bytes left
[ 4.064993][ T1] Initialise system trusted keyrings
[ 4.066246][ T91] kworker/u8:4 (91) used greatest stack depth: 27112 bytes left
[ 4.066385][ T1] workingset: timestamp_bits=40 (anon: 35) max_order=21 bucket_order=0 (anon: 0)
[ 4.072309][ T1] DLM installed
[ 4.085434][ T1] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 4.091547][ T1] NFS: Registering the id_resolver key type
[ 4.091620][ T1] Key type id_resolver registered
[ 4.091629][ T1] Key type id_legacy registered
[ 4.091850][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[ 4.091897][ T1] nfs4flexfilelayout_init: NFSv4 Flexfile Layout Driver Registering...
[ 4.106533][ T1] smbdirect: subsystem loading...
[ 4.111431][ T1] smbdirect: subsystem loaded
[ 4.127785][ T1] Key type cifs.spnego registered
[ 4.128016][ T1] Key type cifs.idmap registered
[ 4.132359][ T1] ntfs3: Enabled Linux POSIX ACLs support
[ 4.132370][ T1] ntfs3: Read-only LZX/Xpress compression included
[ 4.132664][ T1] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 4.142360][ T1] romfs: ROMFS MTD (C) 2007 Red Hat, Inc.
[ 4.142543][ T1] QNX4 filesystem 0.2.3 registered.
[ 4.142633][ T1] qnx6: QNX6 filesystem 1.0.0 registered.
[ 4.143431][ T1] fuse: init (API version 7.45)
[ 4.151974][ T1] orangefs_debugfs_init: called with debug mask: :none: :0:
[ 4.153286][ T1] orangefs_init: module version upstream loaded
[ 4.154144][ T1] JFS: nTxBlock = 8192, nTxLock = 65536
[ 4.174258][ T1] SGI XFS with ACLs, security attributes, realtime, scrub, repair, quota, no debug enabled
[ 4.184420][ T1] 9p: Installing v9fs 9p2000 file system support
[ 4.186671][ T1] NILFS version 2 loaded
[ 4.186683][ T1] befs: version: 0.9.3
[ 4.187442][ T1] ocfs2: Registered cluster interface o2cb
[ 4.188474][ T1] ocfs2: Registered cluster interface user
[ 4.189060][ T1] OCFS2 User DLM kernel interface loaded
[ 4.214949][ T1] gfs2: GFS2 installed
[ 4.229293][ T1] ceph: loaded (mds proto 32)
[ 4.238903][ T1] NET: Registered PF_ALG protocol family
[ 4.239054][ T1] async_tx: api initialized (async)
[ 4.239092][ T1] Key type asymmetric registered
[ 4.239106][ T1] Asymmetric key parser 'x509' registered
[ 4.239123][ T1] Asymmetric key parser 'pkcs8' registered
[ 4.239133][ T1] Key type pkcs7_test registered
[ 4.239620][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[ 4.241300][ T1] io scheduler mq-deadline registered
[ 4.241315][ T1] io scheduler kyber registered
[ 4.241581][ T1] io scheduler bfq registered
[ 4.242919][ T1] raid6: skipped pq benchmark and selected avx2x4
[ 4.278878][ T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[ 4.280653][ T1] ACPI: button: Power Button [PWRF]
[ 4.283108][ T1] input: Sleep Button as /devices/platform/LNXSLPBN:00/input/input1
[ 4.292354][ T1] ACPI: button: Sleep Button [SLPF]
[ 4.305446][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 4.336960][ T10] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 4.337073][ T10] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 4.376579][ T10] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 4.376678][ T10] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 4.409494][ T10] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 4.409583][ T10] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 4.430124][ T10] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 4.505347][ T257] kworker/u8:4 (257) used greatest stack depth: 27048 bytes left
[ 4.994169][ T1] N_HDLC line discipline registered with maxframe=4096
[ 4.998597][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 5.004004][ T1] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 5.022753][ T1] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 5.038557][ T1] 00:04: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 5.054095][ T1] 00:05: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 5.086606][ T1] Non-volatile memory driver v1.3
[ 5.122258][ T1] usbcore: registered new interface driver xillyusb
[ 5.129858][ T1] ACPI: bus type drm_connector registered
[ 5.134169][ T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[ 5.140536][ T1] ------------[ cut here ]------------
[ 5.140548][ T1] [PLANE:35:plane-0] pixel format with alpha exposed but blend mode not setup
[ 5.140569][ T1] WARNING: drivers/gpu/drm/drm_mode_config.c:873 at drm_mode_config_validate+0x1c6d/0x1e60, CPU#1: swapper/0/1
[ 5.140623][ T1] Modules linked in:
[ 5.140658][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
[ 5.140677][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 5.140693][ T1] RIP: 0010:drm_mode_config_validate+0x1cae/0x1e60
[ 5.140721][ 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 fa 80 ae fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 d6 2a 42 fc 49 bd 00 00 00 00 00 fc ff df
[ 5.140737][ T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[ 5.140751][ T1] RAX: 1ffff11004ca4808 RBX: dffffc0000000000 RCX: ffff88801c6f5d00
[ 5.140764][ T1] RDX: ffff88802632e100 RSI: 0000000000000023 RDI: ffffffff8fdc0880
[ 5.140775][ T1] RBP: 0000000000000023 R08: 0000000000000000 R09: 0000000000000000
[ 5.140786][ T1] R10: dffffc0000000000 R11: fffffbfff1fa18d0 R12: dffffc0000000000
[ 5.140798][ T1] R13: ffffffff8fdc0880 R14: ffff888026524040 R15: ffff888026524030
[ 5.140811][ T1] FS: 0000000000000000(0000) GS:ffff888125af3000(0000) knlGS:0000000000000000
[ 5.140824][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 5.140836][ T1] CR2: 0000000000000000 CR3: 000000000e1b0000 CR4: 00000000003526f0
[ 5.140850][ T1] Call Trace:
[ 5.140856][ T1]
[ 5.140871][ T1] ? debugfs_create_file_full+0x3f/0x60
[ 5.140899][ T1] drm_dev_register+0x7f/0xd80
[ 5.140922][ T1] vkms_create+0x40d/0x4f0
[ 5.140939][ T1] ? __pfx_vkms_init+0x10/0x10
[ 5.140960][ T1] vkms_init+0x57/0x80
[ 5.140975][ T1] do_one_initcall+0x250/0x870
[ 5.141002][ T1] ? __pfx_vkms_init+0x10/0x10
[ 5.141018][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 5.141039][ T1] ? __pfx___schedule+0x10/0x10
[ 5.141062][ T1] ? rcu_is_watching+0x15/0xb0
[ 5.141080][ T1] ? trace_irq_enable+0x3b/0x140
[ 5.141096][ T1] ? irqentry_exit+0x218/0x8f0
[ 5.141112][ T1] ? trace_irq_disable+0x3b/0x140
[ 5.141134][ T1] ? strlen+0x2e/0x70
[ 5.141152][ T1] ? next_arg+0x4a0/0x5e0
[ 5.141170][ T1] ? parameq+0x14d/0x170
[ 5.141192][ T1] ? parse_args+0x9c3/0xad0
[ 5.141220][ T1] ? trace_kmalloc+0x2a/0xf0
[ 5.141241][ T1] ? rcu_is_watching+0x15/0xb0
[ 5.141260][ T1] do_initcall_level+0x10a/0x1a0
[ 5.141281][ T1] ? kernel_init+0x22/0x1d0
[ 5.141300][ T1] do_initcalls+0x59/0xa0
[ 5.141320][ T1] kernel_init_freeable+0x29d/0x3e0
[ 5.141340][ T1] ? __pfx_kernel_init+0x10/0x10
[ 5.141359][ T1] kernel_init+0x22/0x1d0
[ 5.141377][ T1] ? __pfx_kernel_init+0x10/0x10
[ 5.141396][ T1] ret_from_fork+0x514/0xb70
[ 5.141417][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 5.141436][ T1] ? __switch_to+0xc89/0x1420
[ 5.141455][ T1] ? __pfx_kernel_init+0x10/0x10
[ 5.141475][ T1] ret_from_fork_asm+0x1a/0x30
[ 5.141500][ T1]
[ 5.141508][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 5.141520][ T1] CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT_{RT,(full)}
[ 5.141537][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
[ 5.141546][ T1] Call Trace:
[ 5.141552][ T1]
[ 5.141558][ T1] vpanic+0x56c/0xa60
[ 5.141574][ T1] ? __pfx__printk+0x10/0x10
[ 5.141592][ T1] ? __pfx_vpanic+0x10/0x10
[ 5.141606][ T1] ? is_bpf_text_address+0x292/0x2b0
[ 5.141623][ T1] ? is_bpf_text_address+0x26/0x2b0
[ 5.141644][ T1] panic+0xc5/0xd0
[ 5.141658][ T1] ? __pfx_panic+0x10/0x10
[ 5.141677][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 5.141698][ T1] __warn+0x315/0x4c0
[ 5.141713][ T1] ? drm_mode_config_validate+0x1c6d/0x1e60
[ 5.141735][ T1] ? drm_mode_config_validate+0x1c6d/0x1e60
[ 5.141757][ T1] __report_bug+0x276/0x570
[ 5.141775][ T1] ? drm_mode_config_validate+0x1c6d/0x1e60
[ 5.141797][ T1] ? __pfx___report_bug+0x10/0x10
[ 5.141813][ T1] ? rcu_is_watching+0x15/0xb0
[ 5.141831][ T1] ? trace_irq_enable+0x3b/0x140
[ 5.141848][ T1] ? rt_mutex_slowunlock+0x4ee/0xa20
[ 5.141871][ T1] report_bug_entry+0x19a/0x290
[ 5.141888][ T1] ? drm_mode_config_validate+0x1cae/0x1e60
[ 5.141908][ T1] ? drm_mode_config_validate+0x1cb3/0x1e60
[ 5.141929][ T1] handle_bug+0xce/0x200
[ 5.141948][ T1] exc_invalid_op+0x1a/0x50
[ 5.141967][ T1] asm_exc_invalid_op+0x1a/0x20
[ 5.141988][ T1] RIP: 0010:drm_mode_config_validate+0x1cae/0x1e60
[ 5.142011][ 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 fa 80 ae fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 d6 2a 42 fc 49 bd 00 00 00 00 00 fc ff df
[ 5.142024][ T1] RSP: 0000:ffffc90000067810 EFLAGS: 00010246
[ 5.142037][ T1] RAX: 1ffff11004ca4808 RBX: dffffc0000000000 RCX: ffff88801c6f5d00
[ 5.142050][ T1] RDX: ffff88802632e100 RSI: 0000000000000023 RDI: ffffffff8fdc0880
[ 5.142062][ T1] RBP: 0000000000000023 R08: 0000000000000000 R09: 0000000000000000
[ 5.142072][ T1] R10: dffffc0000000000 R11: fffffbfff1fa18d0 R12: dffffc0000000000
[ 5.142084][ T1] R13: ffffffff8fdc0880 R14: ffff888026524040 R15: ffff888026524030
[ 5.142107][ T1] ? debugfs_create_file_full+0x3f/0x60
[ 5.142129][ T1] drm_dev_register+0x7f/0xd80
[ 5.142151][ T1] vkms_create+0x40d/0x4f0
[ 5.142168][ T1] ? __pfx_vkms_init+0x10/0x10
[ 5.142184][ T1] vkms_init+0x57/0x80
[ 5.142199][ T1] do_one_initcall+0x250/0x870
[ 5.142219][ T1] ? __pfx_vkms_init+0x10/0x10
[ 5.142235][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 5.142256][ T1] ? __pfx___schedule+0x10/0x10
[ 5.142275][ T1] ? rcu_is_watching+0x15/0xb0
[ 5.142292][ T1] ? trace_irq_enable+0x3b/0x140
[ 5.142307][ T1] ? irqentry_exit+0x218/0x8f0
[ 5.142323][ T1] ? trace_irq_disable+0x3b/0x140
[ 5.142345][ T1] ? strlen+0x2e/0x70
[ 5.142362][ T1] ? next_arg+0x4a0/0x5e0
[ 5.142380][ T1] ? parameq+0x14d/0x170
[ 5.142401][ T1] ? parse_args+0x9c3/0xad0
[ 5.142428][ T1] ? trace_kmalloc+0x2a/0xf0
[ 5.142449][ T1] ? rcu_is_watching+0x15/0xb0
[ 5.142468][ T1] do_initcall_level+0x10a/0x1a0
[ 5.142488][ T1] ? kernel_init+0x22/0x1d0
[ 5.142508][ T1] do_initcalls+0x59/0xa0
[ 5.142528][ T1] kernel_init_freeable+0x29d/0x3e0
[ 5.142548][ T1] ? __pfx_kernel_init+0x10/0x10
[ 5.142568][ T1] kernel_init+0x22/0x1d0
[ 5.142586][ T1] ? __pfx_kernel_init+0x10/0x10
[ 5.142605][ T1] ret_from_fork+0x514/0xb70
[ 5.142625][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 5.142645][ T1] ? __switch_to+0xc89/0x1420
[ 5.142663][ T1] ? __pfx_kernel_init+0x10/0x10
[ 5.142683][ T1] ret_from_fork_asm+0x1a/0x30
[ 5.142709][ T1]
[ 5.143104][ T1] Kernel Offset: disabled
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-build2306358769=/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 0c1d6ded35
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}}' ./sys/syz-sysgen | grep -q false || go install ./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=0c1d6ded3570097468e0af306043c121b2ded6a8 -X github.com/google/syzkaller/prog.gitRevisionDate=20250723-145545" -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=\"0c1d6ded3570097468e0af306043c121b2ded6a8\"
/usr/bin/ld: /tmp/ccAquWwo.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