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@10.128.1.145" "pwd"]: exit status 255
ssh: connect to host 10.128.1.145 port 22: Connection timed out
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '[us-central1-ssh-serialport.googleapis.com]:9600' (ECDSA) to the list of known hosts.
SeaBIOS (version 1.8.2-google)
Total RAM Size = 0x0000000200000000 = 8192 MiB
CPUs found: 2 Max CPUs supported: 2
SeaBIOS (version 1.8.2-google)
Machine UUID bc75221c-bda7-2114-023c-35d84fbe4d56
found virtio-scsi at 0:3
virtio-scsi vendor='Google' product='PersistentDisk' rev='1' type=0 removable=0
virtio-scsi blksize=512 sectors=4194304 = 2048 MiB
drive 0x000f25d0: PCHS=0/0/0 translation=lba LCHS=520/128/63 s=4194304
Sending Seabios boot VM event.
Booting from Hard Disk 0...
[ 0.000000][ T0] Linux version syzkaller (syzkaller@syzkaller) (Debian clang version 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
[ 0.000005][ T0] kvm-clock: using sched offset of 4839213464 cycles
[ 0.000012][ T0] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[ 0.000033][ T0] tsc: Detected 2199.998 MHz processor
[ 0.004015][ T0] e820: update [mem 0x00000000-0x00000fff] System RAM ==> device reserved
[ 0.004031][ T0] e820: remove [mem 0x000a0000-0x000fffff] System RAM
[ 0.004049][ T0] last_pfn = 0x240000 max_arch_pfn = 0x400000000
[ 0.004098][ T0] MTRR map: 4 entries (3 fixed + 1 variable; max 19), built from 8 variable MTRRs
[ 0.004109][ T0] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT
[ 0.004172][ T0] last_pfn = 0xbfffd max_arch_pfn = 0x400000000
[ 0.009167][ T0] found SMP MP-table at [mem 0x000f2890-0x000f289f]
[ 0.009194][ T0] Using GB pages for direct mapping
[ 0.012836][ T0] ACPI: Early table checksum verification disabled
[ 0.012860][ T0] ACPI: RSDP 0x00000000000F2610 000014 (v00 Google)
[ 0.012876][ T0] ACPI: RSDT 0x00000000BFFFFFB0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001)
[ 0.012898][ T0] ACPI: FACP 0x00000000BFFFF370 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001)
[ 0.012927][ T0] ACPI: DSDT 0x00000000BFFFD900 001A64 (v01 Google GOOGDSDT 00000001 GOOG 00000001)
[ 0.012944][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.012958][ T0] ACPI: FACS 0x00000000BFFFD8C0 000040
[ 0.012972][ T0] ACPI: SRAT 0x00000000BFFFFEA0 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001)
[ 0.012989][ T0] ACPI: APIC 0x00000000BFFFFDF0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001)
[ 0.013007][ T0] ACPI: SSDT 0x00000000BFFFF470 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001)
[ 0.013024][ T0] ACPI: WAET 0x00000000BFFFFE70 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001)
[ 0.013039][ T0] ACPI: Reserving FACP table memory at [mem 0xbffff370-0xbffff463]
[ 0.013047][ T0] ACPI: Reserving DSDT table memory at [mem 0xbfffd900-0xbffff363]
[ 0.013053][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.013060][ T0] ACPI: Reserving FACS table memory at [mem 0xbfffd8c0-0xbfffd8ff]
[ 0.013066][ T0] ACPI: Reserving SRAT table memory at [mem 0xbffffea0-0xbfffff67]
[ 0.013073][ T0] ACPI: Reserving APIC table memory at [mem 0xbffffdf0-0xbffffe65]
[ 0.013079][ T0] ACPI: Reserving SSDT table memory at [mem 0xbffff470-0xbffffdef]
[ 0.013086][ T0] ACPI: Reserving WAET table memory at [mem 0xbffffe70-0xbffffe97]
[ 0.013209][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff]
[ 0.013219][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff]
[ 0.013227][ T0] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff]
[ 0.013238][ T0] NUMA: Node 0 [mem 0x00001000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00001000-0xbfffffff]
[ 0.013249][ T0] NUMA: Node 0 [mem 0x00001000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00001000-0x23fffffff]
[ 0.013271][ T0] Faking node 0 at [mem 0x0000000000001000-0x0000000140000fff] (5120MB)
[ 0.013280][ T0] Faking node 1 at [mem 0x0000000140001000-0x000000023fffffff] (4095MB)
[ 0.013374][ T0] NODE_DATA(0) allocated [mem 0x13fffac80-0x140000fff]
[ 0.014132serialport: Connected to syzkaller.us-central1-c.ci-upstream-linux-next-kasan-gce-root-test-job-parallel-0 port 1 (session ID: 11f8e0b9b4eb02747797db9d5574906712cda303818c362569ced8f174daa573, active connections: 1).
][ T0] NODE_DATA(1) allocated [mem 0x23fff6c80-0x23fffcfff]
[ 0.298211][ T0] KernelAddressSanitizer initialized (generic)
[ 0.299000][ T0] ACPI: PM-Timer IO Port: 0xb008
[ 0.299033][ T0] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1])
[ 0.299165][ T0] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23
[ 0.299178][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level)
[ 0.299187][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[ 0.299195][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level)
[ 0.299202][ T0] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level)
[ 0.299221][ T0] ACPI: Using ACPI (MADT) for SMP configuration information
[ 0.299231][ T0] CPU topo: Max. logical packages: 1
[ 0.299235][ T0] CPU topo: Max. logical nodes: 1
[ 0.299239][ T0] CPU topo: Num. nodes per package: 1
[ 0.299247][ T0] CPU topo: Max. logical dies: 1
[ 0.299251][ T0] CPU topo: Max. dies per package: 1
[ 0.299262][ T0] CPU topo: Max. threads per core: 2
[ 0.299266][ T0] CPU topo: Num. cores per package: 1
[ 0.299270][ T0] CPU topo: Num. threads per package: 2
[ 0.299275][ T0] CPU topo: Allowing 2 present CPUs plus 0 hotplug CPUs
[ 0.299379][ T0] PM: hibernation: Registered nosave memory: [mem 0x00000000-0x00000fff]
[ 0.299389][ T0] PM: hibernation: Registered nosave memory: [mem 0x0009f000-0x000fffff]
[ 0.299397][ T0] PM: hibernation: Registered nosave memory: [mem 0xbfffd000-0xffffffff]
[ 0.299420][ T0] [gap 0xc0000000-0xfffbbfff] available for PCI devices
[ 0.299426][ T0] Booting paravirtualized kernel on KVM
[ 0.299437][ T0] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.428345][ T0] Zone ranges:
[ 0.428354][ T0] DMA [mem 0x0000000000001000-0x0000000000ffffff]
[ 0.428366][ T0] DMA32 [mem 0x0000000001000000-0x00000000ffffffff]
[ 0.428376][ T0] Normal [mem 0x0000000100000000-0x000000023fffffff]
[ 0.428385][ T0] Device empty
[ 0.428389][ T0] Movable zone start for each node
[ 0.428393][ T0] Early memory node ranges
[ 0.428396][ T0] node 0: [mem 0x0000000000001000-0x000000000009efff]
[ 0.428403][ T0] node 0: [mem 0x0000000000100000-0x00000000bfffcfff]
[ 0.428411][ T0] node 0: [mem 0x0000000100000000-0x0000000140000fff]
[ 0.428418][ T0] node 1: [mem 0x0000000140001000-0x000000023fffffff]
[ 0.428427][ T0] Initmem setup node 0 [mem 0x0000000000001000-0x0000000140000fff]
[ 0.428445][ T0] Initmem setup node 1 [mem 0x0000000140001000-0x000000023fffffff]
[ 0.428493][ T0] On node 0, zone DMA: 1 pages in unavailable ranges
[ 0.428758][ T0] On node 0, zone DMA: 97 pages in unavailable ranges
[ 0.494891][ T0] On node 0, zone Normal: 3 pages in unavailable ranges
[ 0.561677][ T0] setup_percpu: NR_CPUS:8 nr_cpumask_bits:2 nr_cpu_ids:2 nr_node_ids:2
[ 0.562376][ T0] percpu: Embedded 71 pages/cpu s253896 r8192 d28728 u1048576
[ 0.562403][ T0] pcpu-alloc: s253896 r8192 d28728 u1048576 alloc=1*2097152
[ 0.562416][ T0] pcpu-alloc: [0] 0 1
[ 0.562540][ T0] kvm-guest: PV spinlocks enabled
[ 0.562550][ T0] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.562570][ 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 \
[ 0.562599][ T0] Kernel command line: comedi.comedi_num_legacy_minors=4 panic_on_warn=1 BOOT_IMAGE=/boot/bzImage root=/dev/sda1 console=ttyS0
[ 0.567116][ T0] Unknown kernel command line parameters "nbds_max=32", will be passed to user space.
[ 0.567190][ T0] random: crng init done
[ 0.567194][ T0] printk: log buffer data + meta data: 262144 + 917504 = 1179648 bytes
[ 0.567389][ T0] software IO TLB: area num 2.
[ 0.593453][ T0] Fallback order for Node 0: 0 1
[ 0.593473][ T0] Fallback order for Node 1: 1 0
[ 0.593488][ T0] Built 2 zonelists, mobility grouping on. Total pages: 2097051
[ 0.593495][ T0] Policy zone: Normal
[ 0.594128][ T0] mem auto-init: stack:all(zero), heap alloc:on, heap free:off
[ 0.594136][ T0] stackdepot: allocating hash table via alloc_large_system_hash
[ 0.594146][ T0] stackdepot hash table entries: 1048576 (order: 12, 16777216 bytes, linear)
[ 0.598306][ T0] stackdepot: allocating space for 8192 stack pools via memblock
[ 1.189021][ T0] **********************************************************
[ 1.189031][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.189035][ T0] ** **
[ 1.189038][ T0] ** This system shows unhashed kernel memory addresses **
[ 1.189042][ T0] ** via the console, logs, and other interfaces. This **
[ 1.189045][ T0] ** might reduce the security of your system. **
[ 1.189049][ T0] ** **
[ 1.189053][ T0] ** If you see this message and you are not debugging **
[ 1.189056][ T0] ** the kernel, report this immediately to your system **
[ 1.189060][ T0] ** administrator! **
[ 1.189063][ T0] ** **
[ 1.189067][ T0] ** Use hash_pointers=always to force this mode off **
[ 1.189071][ T0] ** **
[ 1.189074][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE **
[ 1.189078][ T0] **********************************************************
[ 1.190052][ T0] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13fe2c
[ 1.190066][ T0] head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 1.190074][ T0] flags: 0x100000000000040(head|node=0|zone=2)
[ 1.190088][ T0] raw: 0100000000000040 dead000000000100 dead000000000122 0000000000000000
[ 1.190096][ T0] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 1.190105][ T0] head: 0100000000000040 dead000000000100 dead000000000122 0000000000000000
[ 1.190113][ T0] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 1.190122][ T0] head: 0100000000000002 ffffffffffffff01 00000000ffffffff 00000000ffffffff
[ 1.190130][ T0] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000004
[ 1.190134][ T0] page dumped because: VM_BUG_ON_PAGE(1 && PageCompound(page))
[ 1.190241][ T0] ------------[ cut here ]------------
[ 1.190244][ T0] kernel BUG at ./include/linux/page-flags.h:682!
[ 1.190257][ T0] Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
[ 1.190269][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted syzkaller #0 PREEMPT_{RT,(undef)}
[ 1.190281][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
[ 1.190287][ T0] RIP: 0010:post_alloc_hook+0x287/0x310
[ 1.190306][ 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
[ 1.190315][ T0] RSP: 0000:ffffffff8dc078e0 EFLAGS: 00010046
[ 1.190324][ T0] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8dcfef40
[ 1.190331][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1.190337][ T0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[ 1.190343][ T0] R10: dffffc0000000000 R11: ffffed10170c4903 R12: dffffc0000000000
[ 1.190350][ T0] R13: ffffea0004ff8b00 R14: 1ffffd40009ff160 R15: 0000000000000000
[ 1.190357][ T0] FS: 0000000000000000(0000) GS:ffff888125ec5000(0000) knlGS:0000000000000000
[ 1.190365][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.190372][ T0] CR2: ffff88823ffff000 CR3: 000000000ddb8000 CR4: 00000000000100b0
[ 1.190382][ T0] Call Trace:
[ 1.190386][ T0]
[ 1.190392][ T0] get_page_from_freelist+0x3081/0x3320
[ 1.190405][ T0] ? __pfx_stack_trace_consume_entry+0x10/0x10
[ 1.190422][ T0] ? stack_trace_save+0xa9/0x100
[ 1.190436][ T0] ? prepare_alloc_pages+0x22a/0x6b0
[ 1.190452][ T0] __alloc_frozen_pages_noprof+0x194/0x380
[ 1.190463][ T0] ? __pfx___alloc_frozen_pages_noprof+0x10/0x10
[ 1.190474][ T0] ? __pfx_policy_nodemask+0x10/0x10
[ 1.190484][ T0] ? rt_mutex_slowunlock+0x4a7/0x8b0
[ 1.190500][ T0] __alloc_pages_mpol+0xe0/0x390
[ 1.190511][ T0] allocate_slab+0x83/0x5e0
[ 1.190524][ T0] ___slab_alloc+0x160/0x930
[ 1.190536][ T0] ? do_kmem_cache_create+0x8ae/0x9a0
[ 1.190547][ T0] __kmalloc_noprof+0x140/0x7b0
[ 1.190562][ T0] ? do_kmem_cache_create+0x8ae/0x9a0
[ 1.190573][ T0] do_kmem_cache_create+0x8ae/0x9a0
[ 1.190584][ T0] ? rcu_is_watching+0x15/0xb0
[ 1.190594][ T0] create_boot_cache+0xbf/0x120
[ 1.190608][ T0] create_kmalloc_cache+0x41/0xb0
[ 1.190621][ T0] new_kmalloc_cache+0xd4/0x180
[ 1.190634][ T0] create_kmalloc_caches+0x14/0x50
[ 1.190646][ T0] kmem_cache_init+0x14a/0x1e0
[ 1.190660][ T0] mm_core_init+0x7e/0xb0
[ 1.190670][ T0] start_kernel+0x162/0x3e0
[ 1.190686][ T0] x86_64_start_reservations+0x24/0x30
[ 1.190698][ T0] x86_64_start_kernel+0x143/0x1c0
[ 1.190710][ T0] common_startup_64+0x13e/0x157
[ 1.190724][ T0]
[ 1.190727][ T0] Modules linked in:
[ 1.190734][ T0] ---[ end trace 0000000000000000 ]---
[ 1.190740][ T0] RIP: 0010:post_alloc_hook+0x287/0x310
[ 1.190754][ 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
[ 1.190762][ T0] RSP: 0000:ffffffff8dc078e0 EFLAGS: 00010046
[ 1.190770][ T0] RAX: 0000000000000000 RBX: 0000000000000002 RCX: ffffffff8dcfef40
[ 1.190777][ T0] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 1.190782][ T0] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
[ 1.190788][ T0] R10: dffffc0000000000 R11: ffffed10170c4903 R12: dffffc0000000000
[ 1.190795][ T0] R13: ffffea0004ff8b00 R14: 1ffffd40009ff160 R15: 0000000000000000
[ 1.190802][ T0] FS: 0000000000000000(0000) GS:ffff888125ec5000(0000) knlGS:0000000000000000
[ 1.190810][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1.190817][ T0] CR2: ffff88823ffff000 CR3: 000000000ddb8000 CR4: 00000000000100b0
[ 1.190835][ 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-build252578410=/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 349a68c4b05
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
go fmt ./sys/... >/dev/null
touch .descriptions
GOOS=linux GOARCH=amd64 go build "-ldflags=-s -w -X github.com/google/syzkaller/prog.GitRevision=349a68c4b056a06438a1e75e9b8a3a583b06d511 -X 'github.com/google/syzkaller/prog.gitRevisionDate=20240924-145223'" "-tags=syz_target syz_os_linux syz_arch_amd64 " -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 -fpermissive -w -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"349a68c4b056a06438a1e75e9b8a3a583b06d511\"
/usr/bin/ld: /tmp/ccjHj1i7.o: in function `test_cover_filter()':
executor.cc:(.text+0x1683b): warning: the use of `tempnam' is dangerous, better use `mkstemp'
/usr/bin/ld: /tmp/ccjHj1i7.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