kernel BUG in post_alloc_hook
Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
On node 0, zone DMA: 1 pages in unavailable ranges
On node 0, zone DMA: 97 pages in unavailable ranges
On node 0, zone Normal: 3 pages in unavailable ranges
setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
percpu: Embedded 71 pages/cpu s253896 r8192 d28728 u1048576
pcpu-alloc: s253896 r8192 d28728 u1048576 alloc=1*2097152
pcpu-alloc: [0] 0 1
kvm-guest: PV spinlocks enabled
PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
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 \
Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
random: crng init done
printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
software IO TLB: area num 2.
Fallback order for Node 0: 0 1
Fallback order for Node 1: 1 0
Built 2 zonelists, mobility grouping on. Total pages: 2097051
Policy zone: Normal
mem auto-init: stack:all(zero), heap alloc:on, heap free:off
stackdepot: allocating hash table via alloc_large_system_hash
stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
stackdepot: allocating space for 8192 stack pools via memblock
**********************************************************
** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
** **
** This system shows unhashed kernel memory addresses **
** via the console, logs, and other interfaces. This **
** might reduce the security of your system. **
** **
** If you see this message and you are not debugging **
** the kernel, report this immediately to your system **
** administrator! **
** **
** Use hash_pointers=always to force this mode off **
** **
** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
**********************************************************
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13fe2c
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x100000000000040(head|node=0|zone=2)
raw: 0100000000000040 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
head: 0100000000000040 dead000000000100 dead000000000122 0000000000000000
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
head: 0100000000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: VM_BUG_ON_PAGE(1 && PageCompound(page))
------------[ cut here ]------------
kernel BUG at ./include/linux/page-flags.h:682!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted syzkaller #0 PREEMPT_{RT,(undef)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__ClearPagePrezeroed include/linux/page-flags.h:682 [inline]
RIP: 0010:post_alloc_hook+0x287/0x310 mm/page_alloc.c:1863
Code: ff ff 89 da be 01 00 00 00 48 c7 c7 40 50 0f 8e e8 4e 1a cb 02 e9 c5 fe ff ff 4c 89 ef 48 c7 c6 80 ee 5a 8b e8 9a 14 06 ff 90 <0f> 0b 31 ed f7 44 24 04 00 01 00 00 0f 84 8e fd ff ff e9 86 fd ff
RSP: 0000:ffffffff8dc078e0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8dcfef40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10170c4903 R12: dffffc0000000000
R13: ffffea0004ff8b00 R14: 1ffffd40009ff160 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125ec5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000ddb8000 CR4: 00000000000100b0
Call Trace:
prep_new_page mm/page_alloc.c:1925 [inline]
get_page_from_freelist+0x3081/0x3320 mm/page_alloc.c:4015
__alloc_frozen_pages_noprof+0x194/0x380 mm/page_alloc.c:5376
__alloc_pages_mpol+0xe0/0x390 mm/mempolicy.c:2495
alloc_slab_page mm/slub.c:3287 [inline]
allocate_slab+0x83/0x5e0 mm/slub.c:3404
new_slab mm/slub.c:3447 [inline]
___slab_alloc+0x160/0x930 mm/slub.c:4485
__slab_alloc_node mm/slub.c:4549 [inline]
slab_alloc_node mm/slub.c:4925 [inline]
__do_kmalloc_node mm/slub.c:5331 [inline]
__kmalloc_noprof+0x140/0x7b0 mm/slub.c:5345
_kmalloc_noprof include/linux/slab.h:973 [inline]
_kzalloc_noprof include/linux/slab.h:1286 [inline]
__alloc_empty_sheaf mm/slub.c:2774 [inline]
alloc_empty_sheaf mm/slub.c:2794 [inline]
init_percpu_sheaves mm/slub.c:7555 [inline]
do_kmem_cache_create+0x8ae/0x9a0 mm/slub.c:8595
create_boot_cache+0xbf/0x120 mm/slab_common.c:717
create_kmalloc_cache+0x41/0xb0 mm/slab_common.c:735
new_kmalloc_cache+0xd4/0x180 mm/slab_common.c:982
create_kmalloc_caches+0x14/0x50 mm/slab_common.c:1005
kmem_cache_init+0x14a/0x1e0 mm/slub.c:8496
mm_core_init+0x7e/0xb0 mm/mm_init.c:2728
start_kernel+0x162/0x3e0 init/main.c:1034
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ClearPagePrezeroed include/linux/page-flags.h:682 [inline]
RIP: 0010:post_alloc_hook+0x287/0x310 mm/page_alloc.c:1863
Code: ff ff 89 da be 01 00 00 00 48 c7 c7 40 50 0f 8e e8 4e 1a cb 02 e9 c5 fe ff ff 4c 89 ef 48 c7 c6 80 ee 5a 8b e8 9a 14 06 ff 90 <0f> 0b 31 ed f7 44 24 04 00 01 00 00 0f 84 8e fd ff ff e9 86 fd ff
RSP: 0000:ffffffff8dc078e0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8dcfef40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10170c4903 R12: dffffc0000000000
R13: ffffea0004ff8b00 R14: 1ffffd40009ff160 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff888125ec5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823ffff000 CR3: 000000000ddb8000 CR4: 00000000000100b0
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@10.128.1.189" "pwd"]: exit status 255
ssh: connect to host 10.128.1.189 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 dfc5a731-b05d-2e78-daf2-616cdfb761a4
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 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8) #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 05/09/2026
[ 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
[ 0.000004][ T0] kvm-clock: using sched offset of 8203190794 cycles
[ 0.000012][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.000032][ T0] tsc: Detected 2199.998 MHz processor
[ 0.003926][ T0] e820: update [mem 0x00000000-0x00000fff] System RAM ==> device reserved
[ 0.003942][ T0] e820: remove [mem 0x000a0000-0x000fffff] System RAM
[ 0.003961][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.004009][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.004022][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.004080][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.009086][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.009114][ T0] Using GB pages for direct mapping
[ 0.012769][ T0] ACPI: Early table checksum verification disabled
[ 0.012793][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.012811][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.012832][ T0] ACPI: FACP 0x00000000BFFFF370 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.012855][ T0] ACPI: DSDT 0x00000000BFFFD900 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.012873][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.012886][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.012900][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.012918][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.012935][ T0] ACPI: SSDT 0x00000000BFFFF470 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.012953][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.012968][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff370-0xbffff463]
[ 0.012975][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd900-0xbffff363]
[ 0.012982][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.012989][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.012995][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.013001][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.013008][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff470-0xbffffdef]
[ 0.013014][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.013144][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.013154][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.013162][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.013173][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.013185][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.013207][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.013216][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.013315][ T0] NODE_DATA(0) allocated [mem 0x13fffac80-0x140000fff]
[ 0.014053][ T0] NODE_DATA(1) allocated [mem 0x23fff6c80-0x23fffcfff]
[ 0.297155][ T0] KernelAddressSanitizer initialized (generic)
[ 0.297953][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.297986][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.298227][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.298242][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.298250][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.298258][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.298265][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.298284][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.298294][ T0] CPU topo: Max. logical packages: 1
[ 0.298299][ T0] CPU topo: Max. logical nodes: 1
[ 0.298302][ T0] CPU topo: Num. nodes per package: 1
[ 0.298310][ T0] CPU topo: Max. logical dies: 1
[ 0.298314][ T0] CPU topo: Max. dies per package: 1
[ 0.298326][ T0] CPU topo: Max. threads per core: 2
[ 0.298330][ T0] CPU topo: Num. cores per package: 1
[ 0.298335][ T0] CPU topo: Num. threads per package: 2
[ 0.298338][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.298450][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.298460][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.298468][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.298490][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.298497][ T0] Booting paravirtualized kernel on KVM
[ 0.298508][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.427196][ T0] Zone ranges:
[ 0.427205][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.427218][ T0] DMA32 [serialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-1 port 1 (session ID: c065f62b647b4f0baa5807296f74dd7ea04112a834369dc0f879a22827cafba2, active connections: 1).
mem 0x0000000001000000-0x00000000ffffffff]
[ 0.427226][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.427234][ T0] Device empty
[ 0.427239][ T0] Movable zone start for each node
[ 0.427242][ T0] Early memory node ranges
[ 0.427245][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.427253][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.427260][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.427267][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.427276][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.427294][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.427341][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.427600][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.493026][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.558248][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.558945][ T0] percpu: Embedded 71 pages/cpu s253896 r8192 d28728 u1048576
[ 0.558972][ T0] pcpu-alloc: s253896 r8192 d28728 u1048576 alloc=1*2097152
[ 0.558986][ T0] pcpu-alloc: [0] 0 1
[ 0.559120][ T0] kvm-guest: PV spinlocks enabled
[ 0.559130][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.559150][ 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 \
[ 0.559179][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 0.563679][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 0.563755][ T0] random: crng init done
[ 0.563759][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 0.563958][ T0] software IO TLB: area num 2.
[ 0.589707][ T0] Fallback order for Node 0: 0 1
[ 0.589726][ T0] Fallback order for Node 1: 1 0
[ 0.589740][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 0.589748][ T0] Policy zone: Normal
[ 0.590395][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 0.590403][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 0.590413][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 0.594669][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.272349][ T0] **********************************************************
[ 1.272359][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.272363][ T0] ** **
[ 1.272367][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.272371][ T0] ** via the console, logs, and other interfaces. This **
[ 1.272374][ T0] ** might reduce the security of your system. **
[ 1.272378][ T0] ** **
[ 1.272381][ T0] ** If you see this message and you are not debugging **
[ 1.272385][ T0] ** the kernel, report this immediately to your system **
[ 1.272389][ T0] ** administrator! **
[ 1.272392][ T0] ** **
[ 1.272396][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.272399][ T0] ** **
[ 1.272403][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.272407][ T0] **********************************************************
[ 1.273343][ T0] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13fe2c
[ 1.273359][ T0] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 1.273367][ T0] flags: 0x100000000000040(head|node=0|zone=2)
[ 1.273381][ T0] raw: 0100000000000040 dead000000000100 dead000000000122 0000000000000000
[ 1.273389][ T0] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 1.273398][ T0] head: 0100000000000040 dead000000000100 dead000000000122 0000000000000000
[ 1.273406][ T0] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 1.273414][ T0] head: 0100000000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
[ 1.273422][ T0] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
[ 1.273427][ T0] page dumped because: VM_BUG_ON_PAGE(1 && PageCompound(page))
[ 1.273534][ T0] ------------[ cut here ]------------
[ 1.273537][ T0] kernel BUG at ./include/linux/page-flags.h:682!
[ 1.273550][ T0] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
[ 1.273562][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted syzkaller #0 PREEMPT_{RT,(undef)}
[ 1.273574][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
[ 1.273580][ T0] RIP: 0010:post_alloc_hook+0x287/0x310
[ 1.273633][ T0] Code: ff ff 89 da be 01 00 00 00 48 c7 c7 40 50 0f 8e e8 4e 1a cb 02 e9 c5 fe ff ff 4c 89 ef 48 c7 c6 80 ee 5a 8b e8 9a 14 06 ff 90 <0f> 0b 31 ed f7 44 24 04 00 01 00 00 0f 84 8e fd ff ff e9 86 fd ff
[ 1.273642][ T0] RSP: 0000:ffffffff8dc078e0 EFLAGS: 00010046
[ 1.273651][ T0] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8dcfef40
[ 1.273658][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1.273664][ T0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[ 1.273669][ T0] R10: dffffc0000000000 R11: ffffed10170c4903 R12: dffffc0000000000
[ 1.273676][ T0] R13: ffffea0004ff8b00 R14: 1ffffd40009ff160 R15: 0000000000000000
[ 1.273684][ T0] FS: 0000000000000000(0000) GS:ffff888125ec5000(0000) knlGS:0000000000000000
[ 1.273692][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.273699][ T0] CR2: ffff88823ffff000 CR3: 000000000ddb8000 CR4: 00000000000100b0
[ 1.273708][ T0] Call Trace:
[ 1.273712][ T0]
[ 1.273718][ T0] get_page_from_freelist+0x3081/0x3320
[ 1.273731][ T0] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 1.273748][ T0] ? stack_trace_save+0xa9/0x100
[ 1.273761][ T0] ? prepare_alloc_pages+0x22a/0x6b0
[ 1.273778][ T0] __alloc_frozen_pages_noprof+0x194/0x380
[ 1.273788][ T0] ? __pfx___alloc_frozen_pages_noprof+0x10/0x10
[ 1.273799][ T0] ? __pfx_policy_nodemask+0x10/0x10
[ 1.273810][ T0] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 1.273826][ T0] __alloc_pages_mpol+0xe0/0x390
[ 1.273837][ T0] allocate_slab+0x83/0x5e0
[ 1.273850][ T0] ___slab_alloc+0x160/0x930
[ 1.273862][ T0] ? do_kmem_cache_create+0x8ae/0x9a0
[ 1.273873][ T0] __kmalloc_noprof+0x140/0x7b0
[ 1.273889][ T0] ? do_kmem_cache_create+0x8ae/0x9a0
[ 1.273900][ T0] do_kmem_cache_create+0x8ae/0x9a0
[ 1.273910][ T0] ? rcu_is_watching+0x15/0xb0
[ 1.273920][ T0] create_boot_cache+0xbf/0x120
[ 1.273935][ T0] create_kmalloc_cache+0x41/0xb0
[ 1.273948][ T0] new_kmalloc_cache+0xd4/0x180
[ 1.273961][ T0] create_kmalloc_caches+0x14/0x50
[ 1.273972][ T0] kmem_cache_init+0x14a/0x1e0
[ 1.273987][ T0] mm_core_init+0x7e/0xb0
[ 1.273997][ T0] start_kernel+0x162/0x3e0
[ 1.274013][ T0] x86_64_start_reservations+0x24/0x30
[ 1.274026][ T0] x86_64_start_kernel+0x143/0x1c0
[ 1.274037][ T0] common_startup_64+0x13e/0x157
[ 1.274052][ T0]
[ 1.274055][ T0] Modules linked in:
[ 1.274062][ T0] ---[ end trace 0000000000000000 ]---
[ 1.274067][ T0] RIP: 0010:post_alloc_hook+0x287/0x310
[ 1.274081][ T0] Code: ff ff 89 da be 01 00 00 00 48 c7 c7 40 50 0f 8e e8 4e 1a cb 02 e9 c5 fe ff ff 4c 89 ef 48 c7 c6 80 ee 5a 8b e8 9a 14 06 ff 90 <0f> 0b 31 ed f7 44 24 04 00 01 00 00 0f 84 8e fd ff ff e9 86 fd ff
[ 1.274089][ T0] RSP: 0000:ffffffff8dc078e0 EFLAGS: 00010046
[ 1.274097][ T0] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8dcfef40
[ 1.274103][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1.274109][ T0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[ 1.274115][ T0] R10: dffffc0000000000 R11: ffffed10170c4903 R12: dffffc0000000000
[ 1.274122][ T0] R13: ffffea0004ff8b00 R14: 1ffffd40009ff160 R15: 0000000000000000
[ 1.274129][ T0] FS: 0000000000000000(0000) GS:ffff888125ec5000(0000) knlGS:0000000000000000
[ 1.274137][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.274144][ T0] CR2: ffff88823ffff000 CR3: 000000000ddb8000 CR4: 00000000000100b0
[ 1.274153][ T0] Kernel panic - not syncing: Fatal exception
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-build3585037462=/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 d6526ea3e6a
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=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./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=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" -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=\"d6526ea3e6ad9081c902859bbb80f9f840377cb4\"
/usr/bin/ld: /tmp/ccu8Yo7o.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