kernel panic: stack is corrupted in start_secondary random: crng done (trusting CPU's manufacturer) smp: Bringing up secondary CPUs ... x86: Booting SMP configuration: .... node #0, CPUs: #1 kvm-clock: cpu 1, msr 60be041, secondary cpu clock Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: start_secondary+0x190/0x190 arch/x86/kernel/smpboot.c:271 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x79/0xae lib/dump_stack.c:113 panic+0x18b/0x3b7 kernel/panic.c:189 __stack_chk_fail+0x15/0x20 kernel/panic.c:642 start_secondary+0x190/0x190 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 Rebooting in 86400 seconds.. [ 0.000000] Linux version 4.20.0-syzkaller (syzkaller@syzkaller) (gcc version 10.2.1 20210110 (Debian 10.2.1-6)) #0 SMP PREEMPT now [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 [ 0.000000] KERNEL supported cpus: [ 0.000000] Intel GenuineIntel [ 0.000000] AMD AuthenticAMD [ 0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' [ 0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' [ 0.000000] x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 [ 0.000000] x86/fpu: Enabled xstate features 0x7, context size is 832 bytes, using 'standard' format. [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable [ 0.000000] BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000bfffcfff] usable [ 0.000000] BIOS-e820: [mem 0x00000000bfffd000-0x00000000bfffffff] reserved [ 0.000000] BIOS-e820: [mem 0x00000000fffbc000-0x00000000ffffffff] reserved [ 0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000023fffffff] usable [ 0.000000] printk: bootconsole [earlyser0] enabled [ 0.000000] ERROR: earlyprintk= earlyser already used [ 0.000000] ERROR: earlyprintk= earlyser already used [ 0.000000] ERROR: earlyprintk= earlyser already used [ 0.000000] Malformed early option 'vsyscall' [ 0.000000] nopcid: PCID feature disabled [ 0.000000] Malformed early option 'vsyscall' [ 0.000000] NX (Execute Disable) protection: active [ 0.000000] SMBIOS 2.4 present. [ 0.000000] DMI: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 0.000000] Hypervisor detected: KVM [ 0.000000] kvm-clock: Using msrs 4b564d01 and 4b564d00 [ 0.000003] kvm-clock: cpu 0, msr 60be001, primary cpu clock [ 0.000004] kvm-clock: using sched offset of 4285837277 cycles [ 0.001644] clocksource: kvm-clock: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns [ 0.007212] tsc: Detected 2299.998 MHz processor [ 0.014532] last_pfn = 0x240000 max_arch_pfn = 0x400000000 [ 0.016450] x86/PAT: Configuration [0-7]: WB WC UC- UC WB WP UC- WT [ 0.018744] last_pfn = 0xbfffd max_arch_pfn = 0x400000000 [ 0.024932] found SMP MP-table at [mem 0x000f2710-0x000f271f] mapped at [(____ptrval____)] [ 0.027352] check: Scanning 1 areas for low memory corruption [ 0.029400] Using GB pages for direct mapping [ 0.031961] ACPI: Early table checksum verification disabled [ 0.034110] ACPI: RSDP 0x00000000000F2490 000014 (v00 Google) [ 0.036863] ACPI: RSDT 0x00000000BFFFFFA0 000038 (v01 Google GOOGRSDT 00000001 GOOG 00000001) [ 0.039655] ACPI: FACP 0x00000000BFFFF340 0000F4 (v02 Google GOOGFACP 00000001 GOOG 00000001) [ 0.042464] ACPI: DSDT 0x00000000BFFFDA80 0018BA (v01 Google GOOGDSDT 00000001 GOOG 00000001) [ 0.045821] ACPI: FACS 0x00000000BFFFDA40 000040 [ 0.046905] ACPI: FACS 0x00000000BFFFDA40 000040 [ 0.047569] ACPI: SRAT 0x00000000BFFFFE70 0000C8 (v03 Google GOOGSRAT 00000001 GOOG 00000001) [ 0.049408] ACPI: APIC 0x00000000BFFFFDC0 000076 (v05 Google GOOGAPIC 00000001 GOOG 00000001) [ 0.052165] ACPI: SSDT 0x00000000BFFFF440 000980 (v01 Google GOOGSSDT 00000001 GOOG 00000001) [ 0.054698] ACPI: WAET 0x00000000BFFFFE40 000028 (v01 Google GOOGWAET 00000001 GOOG 00000001) [ 0.057079] SRAT: PXM 0 -> APIC 0x00 -> Node 0 [ 0.058682] SRAT: PXM 0 -> APIC 0x01 -> Node 0 [ 0.059543] ACPI: SRAT: Node 0 PXM 0 [mem 0x00000000-0x0009ffff] [ 0.061416] ACPI: SRAT: Node 0 PXM 0 [mem 0x00100000-0xbfffffff] [ 0.062718] ACPI: SRAT: Node 0 PXM 0 [mem 0x100000000-0x23fffffff] [ 0.063991] NUMA: Node 0 [mem 0x00000000-0x0009ffff] + [mem 0x00100000-0xbfffffff] -> [mem 0x00000000-0xbfffffff] [ 0.067446] NUMA: Node 0 [mem 0x00000000-0xbfffffff] + [mem 0x100000000-0x23fffffff] -> [mem 0x00000000-0x23fffffff] [ 0.070114] Faking node 0 at [mem 0x0000000000000000-0x000000013fffffff] (5120MB) [ 0.071537] Faking node 1 at [mem 0x0000000140000000-0x000000023fffffff] (4096MB) [ 0.073475] NODE_DATA(0) allocated [mem 0x13fffb000-0x13fffffff] [ 0.074861] NODE_DATA(1) allocated [mem 0x23fff8000-0x23fffcfff] [ 0.076264] Zone ranges: [ 0.077354] DMA [mem 0x0000000000001000-0x0000000000ffffff] [ 0.078565] DMA32 [mem 0x0000000001000000-0x00000000ffffffff] [ 0.079628] Normal [mem 0x0000000100000000-0x000000023fffffff] [ 0.080572] Device empty [ 0.081264] Movable zone start for each node [ 0.082258] Early memory node ranges [ 0.082744] node 0: [mem 0x0000000000001000-0x000000000009efff] [ 0.083777] node 0: [mem 0x0000000000100000-0x00000000bfffcfff] [ 0.084770] node 0: [mem 0x0000000100000000-0x000000013fffffff] [ 0.085788] node 1: [mem 0x0000000140000000-0x000000023fffffff] [ 0.087872] Zeroed struct page in unavailable ranges: 101 pages [ 0.087878] Initmem setup node 0 [mem 0x0000000000001000-0x000000013fffffff] [ 0.127441] Initmem setup node 1 [mem 0x0000000140000000-0x000000023fffffff] [ 0.165823] ACPI: PM-Timer IO Port: 0xb008 [ 0.167051] ACPI: LAPIC_NMI (acpi_id[0xff] dfl dfl lint[0x1]) [ 0.169010] IOAPIC[0]: apic_id 0, version 17, address 0xfec00000, GSI 0-23 [ 0.171088] ACPI: INT_SRC_OVR (bus 0 bus_irq 5 global_irq 5 high level) [ 0.172155] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) [ 0.173269] ACPI: INT_SRC_OVR (bus 0 bus_irq 10 global_irq 10 high level) [ 0.174817] ACPI: INT_SRC_OVR (bus 0 bus_irq 11 global_irq 11 high level) [ 0.176429] Using ACPI (MADT) for SMP configuration information [ 0.177739] smpboot: Allowing 2 CPUs, 0 hotplug CPUs [ 0.179036] PM: Registered nosave memory: [mem 0x00000000-0x00000fff] [ 0.180571] PM: Registered nosave memory: [mem 0x0009f000-0x0009ffff] [ 0.181753] PM: Registered nosave memory: [mem 0x000a0000-0x000effff] [ 0.183265] PM: Registered nosave memory: [mem 0x000f0000-0x000fffff] [ 0.184490] PM: Registered nosave memory: [mem 0xbfffd000-0xbfffffff] [ 0.185539] PM: Registered nosave memory: [mem 0xc0000000-0xfffbbfff] [ 0.186615] PM: Registered nosave memory: [mem 0xfffbc000-0xffffffff] [ 0.187675] [mem 0xc0000000-0xfffbbfff] available for PCI devices [ 0.189152] Booting paravirtualized kernel on KVM [ 0.190106] clocksource: refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 1.154324] random: get_random_bytes called from start_kernel+0x83/0x625 with crng_init=0 [ 1.156243] setup_percpu: NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:2 nr_node_ids:2 [ 1.159331] percpu: Embedded 44 pages/cpu @(____ptrval____) s141832 r8192 d30200 u1048576 [ 1.161178] kvm-stealtime: cpu 0, msr 13ba15240 [ 1.162588] PV qspinlock hash table entries: 256 (order: 0, 4096 bytes) [ 1.164147] Built 2 zonelists, mobility grouping on. Total pages: 2064262 [ 1.166028] Policy zone: Normal [ 1.168051] 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 no_hash_pointers root=/dev/sda console=ttyS0 vsyscall=native numa=fake=2 kvm-intel.nested=1 spec_store_bypass_disable=prctl nopcid vivid.n_devs=16 vivid.multiplanar=1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=16 rose.rose_ndevs=16 dummy_hcd.num=8 watchdog_thresh=55 workqueue.watchdog_thresh=140 sysctl.net.core.netdev_unregister_timeout_secs=140 BOOT_IMAGE=/vmlinuz root=/dev/sda1 console=ttyS0 earlyprintk=serial vsyscall=native net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 [ 1.231673] Memory: 8096356K/8388204K available (49175K kernel code, 3380K rwdata, 12164K rodata, 1936K init, 11628K bss, 291848K reserved, 0K cma-reserved) [ 1.238318] kmemleak: Kernel memory leak detector disabled [ 1.239797] rcu: Preemptible hierarchical RCU implementation. [ 1.241096] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2. [ 1.242192] All grace periods are expedited (rcu_expedited). [ 1.243662] Tasks RCU enabled. [ 1.244293] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. [ 1.245858] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 [ 1.248616] NR_IRQS: 4352, nr_irqs: 440, preallocated irqs: 16 [ 1.251454] Console: colour VGA+ 80x25 [ 1.252492] printk: console [ttyS0] enabled [ 1.252492] printk: console [ttyS0] enabled [ 1.253788] printk: bootconsole [earlyser0] disabled [ 1.253788] printk: bootconsole [earlyser0] disabled [ 1.255398] kmemleak: Early log buffer exceeded (4062), please increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE [ 1.257621] mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl [ 1.259551] ACPI: Core revision 20181213 [ 1.260551] APIC: Switch to symmetric I/O mode setup [ 1.267798] ..TIMER: vector=0x30 apic1=0 pin1=0 apic2=-1 pin2=-1 [ 1.269470] clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x212733415c7, max_idle_ns: 440795236380 ns [ 1.273212] Calibrating delay loop (skipped) preset value.. 4599.99 BogoMIPS (lpj=22999980) [ 1.274797] pid_max: default: 32768 minimum: 301 [ 1.275773] LSM: Security Framework initializing [ 1.276792] Yama: becoming mindful. [ 1.277544] AppArmor: AppArmor initialized [ 1.283970] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes) [ 1.287420] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 1.290036] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.292167] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes) [ 1.293745] mce: CPU supports 32 MCE banks [ 1.294729] Last level iTLB entries: 4KB 1024, 2MB 1024, 4MB 1024 [ 1.295614] Last level dTLB entries: 4KB 1024, 2MB 1024, 4MB 1024, 1GB 4 [ 1.296571] Spectre V2 : Spectre mitigation: kernel not compiled with retpoline; no mitigation available! [ 1.296607] Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl [ 1.299661] Freeing SMP alternatives memory: 96K [ 1.303192] smpboot: CPU0: Intel(R) Xeon(R) CPU @ 2.30GHz (family: 0x6, model: 0x3f, stepping: 0x0) [ 1.353223] Performance Events: unsupported p6 CPU model 63 no PMU driver, software events only. [ 1.373322] rcu: Hierarchical SRCU implementation. [ 1.393311] random: crng done (trusting CPU's manufacturer) [ 1.413208] smp: Bringing up secondary CPUs ... [ 1.493369] x86: Booting SMP configuration: [ 1.494072] .... node #0, CPUs: #1 [ 0.022829] kvm-clock: cpu 1, msr 60be041, secondary cpu clock [ 0.022829] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: start_secondary+0x190/0x190 [ 0.022829] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.20.0-syzkaller #0 [ 0.022829] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 0.022829] Call Trace: [ 0.022829] dump_stack+0x79/0xae [ 0.022829] panic+0x18b/0x3b7 [ 0.022829] ? start_secondary+0x190/0x190 [ 0.022829] ? tick_check_new_device+0x196/0x1f0 [ 0.022829] __stack_chk_fail+0x15/0x20 [ 0.022829] start_secondary+0x190/0x190 [ 0.022829] secondary_startup_64+0xa4/0xb0 [ 0.022829] Rebooting in 86400 seconds..