failed to run ["ssh" "-p" "56108" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "root@localhost" "pwd"]: exit status 255 Connection timed out during banner exchange Connection to 127.0.0.1 port 56108 timed out OpenSBI v0.8 ____ _____ ____ _____ / __ \ / ____| _ \_ _| | | | |_ __ ___ _ __ | (___ | |_) || | | | | | '_ \ / _ \ '_ \ \___ \| _ < | | | |__| | |_) | __/ | | |____) | |_) || |_ \____/| .__/ \___|_| |_|_____/|____/_____| | | |_| Platform Name : riscv-virtio,qemu Platform Features : timer,mfdeleg Platform HART Count : 2 Boot HART ID : 1 Boot HART ISA : rv64imafdcsu BOOT HART Features : pmp,scounteren,mcounteren,time BOOT HART PMP Count : 16 Firmware Base : 0x80000000 Firmware Size : 104 KB Runtime SBI Version : 0.2 MIDELEG : 0x0000000000000222 MEDELEG : 0x000000000000b109 PMP0 : 0x0000000080000000-0x000000008001ffff (A) PMP1 : 0x0000000000000000-0xffffffffffffffff (A,R,W,X) [ 0.000000][ T0] Linux version 5.19.0-rc1-syzkaller-00001-gdc5cb7a833e8 (syzkaller@syzkaller) (riscv64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #0 SMP PREEMPT now [ 0.000000][ T0] OF: fdt: Ignoring memory range 0x80000000 - 0x80200000 [ 0.000000][ T0] Machine model: riscv-virtio,qemu [ 0.000000][ T0] ********************************************************** [ 0.000000][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE ** [ 0.000000][ T0] ** ** [ 0.000000][ T0] ** This system shows unhashed kernel memory addresses ** [ 0.000000][ T0] ** via the console, logs, and other interfaces. This ** [ 0.000000][ T0] ** might reduce the security of your system. ** [ 0.000000][ T0] ** ** [ 0.000000][ T0] ** If you see this message and you are not debugging ** [ 0.000000][ T0] ** the kernel, report this immediately to your system ** [ 0.000000][ T0] ** administrator! ** [ 0.000000][ T0] ** ** [ 0.000000][ T0] ** NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE ** [ 0.000000][ T0] ********************************************************** [ 0.000000][ T0] efi: UEFI not found. [ 0.000000][ T0] cma: Reserved 16 MiB at 0x00000000fee00000 [ 0.000000][ T0] NUMA: No NUMA configuration found [ 0.000000][ T0] NUMA: Faking a node at [mem 0x0000000080200000-0x00000000ffffffff] [ 0.000000][ T0] NUMA: NODE_DATA [mem 0xffff0580-0xffff1fff] [ 0.000000][ T0] Zone ranges: [ 0.000000][ T0] DMA32 [mem 0x0000000080200000-0x00000000ffffffff] [ 0.000000][ T0] Normal empty [ 0.000000][ T0] Movable zone start for each node [ 0.000000][ T0] Early memory node ranges [ 0.000000][ T0] node 0: [mem 0x0000000080200000-0x00000000ffffffff] [ 0.000000][ T0] Initmem setup node 0 [mem 0x0000000080200000-0x00000000ffffffff] [ 0.000000][ T0] On node 0, zone DMA32: 512 pages in unavailable ranges [ 0.000000][ T0] SBI specification v0.2 detected [ 0.000000][ T0] SBI implementation ID=0x1 Version=0x8 [ 0.000000][ T0] SBI TIME extension detected [ 0.000000][ T0] SBI IPI extension detected [ 0.000000][ T0] SBI RFENCE extension detected [ 0.000000][ T0] SBI HSM extension detected [ 0.000000][ T0] riscv: base ISA extensions acdfim [ 0.000000][ T0] riscv: ELF capabilities acdfim [ 0.000000][ T0] percpu: cpu 0 has no node -1 or node-local memory [ 0.000000][ T0] percpu: Embedded 29 pages/cpu s79432 r8192 d31160 u118784 [ 0.000000][ T0] Fallback order for Node 0: 0 [ 0.000000][ T0] Built 1 zonelists, mobility grouping on. Total pages: 514569 [ 0.000000][ T0] Policy zone: DMA32 [ 0.000000][ T0] Kernel command line: root=/dev/vda console=ttyS0 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 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 dummy_hcd.num=2 smp.csd_lock_timeo [ 0.000000][ T0] Unknown kernel command line parameters "earlyprintk=serial", will be passed to user space. [ 0.000000][ T0] Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes, linear) [ 0.000000][ T0] Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear) [ 0.000000][ T0] mem auto-init: stack:off, heap alloc:on, heap free:off [ 0.000000][ T0] Stack Depot early init allocating hash table with memblock_alloc, 8388608 bytes [ 0.000000][ T0] Virtual kernel memory layout: [ 0.000000][ T0] fixmap : 0xff17fffffee00000 - 0xff17ffffff000000 (2048 kB) [ 0.000000][ T0] pci io : 0xff17ffffff000000 - 0xff18000000000000 ( 16 MB) [ 0.000000][ T0] vmemmap : 0xff18000000000000 - 0xff20000000000000 (2048 TB) [ 0.000000][ T0] vmalloc : 0xff20000000000000 - 0xff60000000000000 (16384 TB) [ 0.000000][ T0] lowmem : 0xff60000000000000 - 0xff6000007fe00000 (2046 MB) [ 0.000000][ T0] kasan : 0xffdf000000000000 - 0xffffffff00000000 (8447 TB) [ 0.000000][ T0] kernel : 0xffffffff80000000 - 0xffffffffffffffff (2047 MB) [ 0.000000][ T0] Memory: 1340300K/2095104K available (51768K kernel code, 18787K rwdata, 18432K rodata, 2389K init, 32168K bss, 738420K reserved, 16384K cma-reserved) [ 0.000000][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 0.000000][ T0] trace event string verifier disabled [ 0.000000][ T0] Running RCU self tests [ 0.000000][ T0] rcu: Preemptible hierarchical RCU implementation. [ 0.000000][ T0] rcu: RCU lockdep checking is enabled. [ 0.000000][ T0] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2. [ 0.000000][ T0] rcu: RCU callback double-/use-after-free debug is enabled. [ 0.000000][ T0] rcu: RCU debug extended QS entry/exit. [ 0.000000][ T0] All grace periods are expedited (rcu_expedited). [ 0.000000][ T0] Trampoline variant of Tasks RCU enabled. [ 0.000000][ T0] Tracing variant of Tasks RCU enabled. [ 0.000000][ T0] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. [ 0.000000][ T0] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 [ 0.000000][ T0] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0 [ 0.000000][ T0] riscv-intc: 64 local interrupts mapped [ 0.000000][ T0] plic: plic@c000000: mapped 53 interrupts with 2 handlers for 4 contexts. [ 0.000000][ T0] rcu: srcu_init: Setting srcu_struct sizes based on contention. [ 0.000000][ T0] kfence: initialized - using 2097152 bytes for 255 objects at 0xff6000005a0c6000-0xff6000005a2c6000 [ 0.000000][ T0] riscv_timer_init_dt: Registering clocksource cpuid [0] hartid [1] [ 0.000000][ T0] clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x24e6a1710, max_idle_ns: 440795202120 ns [ 0.000172][ T0] sched_clock: 64 bits at 10MHz, resolution 100ns, wraps every 4398046511100ns [ 0.036733][ T0] Console: colour dummy device 80x25 [ 0.040646][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.040923][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.041145][ T0] ... MAX_LOCK_DEPTH: 48 [ 0.041366][ T0] ... MAX_LOCKDEP_KEYS: 8192 [ 0.041616][ T0] ... CLASSHASH_SIZE: 4096 [ 0.041836][ T0] ... MAX_LOCKDEP_ENTRIES: 131072 [ 0.042050][ T0] ... MAX_LOCKDEP_CHAINS: 262144 [ 0.042262][ T0] ... CHAINHASH_SIZE: 131072 [ 0.042474][ T0] memory used by lock dependency info: 20657 kB [ 0.042695][ T0] memory used for stack traces: 8320 kB [ 0.042917][ T0] per task-struct memory footprint: 1920 bytes [ 0.051760][ T0] Calibrating delay loop (skipped), value calculated using timer frequency.. 20.00 BogoMIPS (lpj=100000) [ 0.052701][ T0] pid_max: default: 32768 minimum: 301 [ 0.062811][ T0] LSM: Security Framework initializing [ 0.067056][ T0] landlock: Up and running. [ 0.067330][ T0] Yama: becoming mindful. [ 0.072514][ T0] TOMOYO Linux initialized [ 0.085445][ T0] AppArmor: AppArmor initialized [ 0.098416][ T0] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) [ 0.098991][ T0] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) [ 0.364336][ T1] cblist_init_generic: Setting adjustable number of callback queues. [ 0.365906][ T1] cblist_init_generic: Setting shift to 1 and lim to 1. [ 0.402447][ T1] cblist_init_generic: Setting shift to 1 and lim to 1. [ 0.411453][ T1] Running RCU-tasks wait API self tests [ 0.582364][ T1] riscv: ELF compat mode failed [ 0.584322][ T1] ASID allocator using 16 bits (65536 entries) [ 0.595709][ T12] Callback from call_rcu_tasks_trace() invoked. [ 0.612330][ T1] rcu: Hierarchical SRCU implementation. [ 0.725836][ T1] EFI services will not be available. [ 0.751760][ T1] smp: Bringing up secondary CPUs ... [ 0.848726][ T1] smp: Brought up 1 node, 2 CPUs [ 0.884653][ T11] Callback from call_rcu_tasks() invoked. [ 0.923034][ T1] allocated 33554432 bytes of page_ext [ 1.227907][ T1] Node 0, zone DMA32: page owner found early allocated 9281 pages [ 1.296027][ T1] devtmpfs: initialized [ 1.675570][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 1.676941][ T1] futex hash table entries: 512 (order: 4, 65536 bytes, linear) [ 1.955644][ T1] NET: Registered PF_NETLINK/PF_ROUTE protocol family [ 1.996444][ T1] audit: initializing netlink subsys (disabled) [ 2.020143][ T26] audit: type=2000 audit(1.760:1): state=initialized audit_enabled=0 res=1 [ 2.106443][ T1] thermal_sys: Registered thermal governor 'step_wise' [ 2.114608][ T1] cpuidle: using governor menu [ 6.895700][ T1] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [ 6.895972][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 7.344756][ T1] raid6: skipped pq benchmark and selected int64x8 [ 7.345319][ T1] raid6: using intx1 recovery algorithm [ 7.480135][ T1] iommu: Default domain type: Translated [ 7.480495][ T1] iommu: DMA domain TLB invalidation policy: strict mode [ 7.577077][ T1] SCSI subsystem initialized [ 7.630035][ T1] usbcore: registered new interface driver usbfs [ 7.635322][ T1] usbcore: registered new interface driver hub [ 7.638388][ T1] usbcore: registered new device driver usb [ 7.706762][ T1] EDAC MC: Ver: 3.0.0 [ 7.770380][ T1] Advanced Linux Sound Architecture Driver Initialized. [ 7.865074][ T1] NetLabel: Initializing [ 7.865250][ T1] NetLabel: domain hash size = 128 [ 7.865456][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO [ 7.874870][ T1] NetLabel: unlabeled traffic allowed by default [ 7.906734][ T1] nfc: nfc_init: NFC Core ver 0.1 [ 7.916121][ T1] NET: Registered PF_NFC protocol family [ 7.934742][ T1] vgaarb: loaded [ 7.989615][ T1] clocksource: Switched to clocksource riscv_clocksource [ 8.122789][ T1] VFS: Disk quotas dquot_6.6.0 [ 8.128368][ T1] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [ 8.143209][ T1] FS-Cache: Loaded [ 8.168155][ T1] CacheFiles: Loaded [ 8.183120][ T1] TOMOYO: 2.6.0 [ 8.183398][ T1] Mandatory Access Control activated. [ 8.264795][ T1] AppArmor: AppArmor Filesystem Enabled [ 9.518599][ T1] NET: Registered PF_INET protocol family [ 9.543967][ T1] IP idents hash table entries: 32768 (order: 6, 262144 bytes, linear) [ 9.651428][ T1] tcp_listen_portaddr_hash hash table entries: 1024 (order: 4, 73728 bytes, linear) [ 9.655492][ T1] TCP established hash table entries: 16384 (order: 5, 131072 bytes, linear) [ 9.696557][ T1] TCP bind bhash tables hash table entries: 16384 (order: 8, 1310720 bytes, linear) [ 9.726467][ T1] TCP: Hash tables configured (established 16384 bind 16384) [ 9.750718][ T1] MPTCP token hash table entries: 2048 (order: 5, 180224 bytes, linear) [ 9.765345][ T1] UDP hash table entries: 1024 (order: 5, 163840 bytes, linear) [ 9.776349][ T1] UDP-Lite hash table entries: 1024 (order: 5, 163840 bytes, linear) [ 9.806362][ T1] NET: Registered PF_UNIX/PF_LOCAL protocol family [ 9.809350][ T1] NET: Registered PF_XDP protocol family [ 9.810090][ T1] PCI: CLS 0 bytes, default 64 [ 9.910298][ T1] kvm [1]: hypervisor extension not available [ 10.430096][ T1] Initialise system trusted keyrings [ 10.467193][ T1] workingset: timestamp_bits=44 max_order=19 bucket_order=0 [ 11.641208][ T1] zbud: loaded [ 11.910417][ T1] DLM installed [ 12.358945][ T1] fuse: init (API version 7.36) [ 12.746936][ T1] NET: Registered PF_ALG protocol family [ 12.750440][ T1] xor: measuring software checksum speed [ 12.903073][ T1] 8regs : 65 MB/sec [ 13.069770][ T1] 8regs_prefetch : 60 MB/sec [ 13.213903][ T1] 32regs : 69 MB/sec [ 13.411592][ T1] 32regs_prefetch : 56 MB/sec [ 13.411996][ T1] xor: using function: 32regs (69 MB/sec) [ 13.414025][ T1] async_tx: api initialized (async) [ 13.414931][ T1] Key type asymmetric registered [ 13.415479][ T1] Asymmetric key parser 'x509' registered [ 13.415849][ T1] Asymmetric key parser 'pkcs8' registered [ 13.416027][ T1] Key type pkcs7_test registered [ 13.532905][ T1] alg: self-tests for CTR-KDF (hmac(sha256)) passed [ 13.549702][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 245) [ 13.582856][ T1] io scheduler mq-deadline registered [ 13.583192][ T1] io scheduler kyber registered [ 13.623006][ T1] io scheduler bfq registered [ 14.306681][ T1] pci-host-generic 30000000.pci: host bridge /soc/pci@30000000 ranges: [ 14.344039][ T1] pci-host-generic 30000000.pci: IO 0x0003000000..0x000300ffff -> 0x0000000000 [ 14.366432][ T1] pci-host-generic 30000000.pci: MEM 0x0040000000..0x007fffffff -> 0x0040000000 [ 16.329128][ T1] pci-host-generic 30000000.pci: ECAM at [mem 0x30000000-0x3fffffff] for [bus 00-ff] [ 16.355550][ T1] pci-host-generic 30000000.pci: PCI host bridge to bus 0000:00 [ 16.356727][ T1] pci_bus 0000:00: root bus resource [bus 00-ff] [ 16.358344][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 16.358889][ T1] pci_bus 0000:00: root bus resource [mem 0x40000000-0x7fffffff] [ 16.365807][ T1] pci 0000:00:00.0: [1b36:0008] type 00 class 0x060000 [ 16.410743][ T1] pci 0000:00:01.0: [1af4:1005] type 00 class 0x00ff00 [ 16.412285][ T1] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x001f] [ 16.413626][ T1] pci 0000:00:01.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 16.462168][ T1] pci 0000:00:02.0: [1af4:1000] type 00 class 0x020000 [ 16.463162][ T1] pci 0000:00:02.0: reg 0x10: [io 0x0000-0x001f] [ 16.463649][ T1] pci 0000:00:02.0: reg 0x14: [mem 0x00000000-0x00000fff] [ 16.464518][ T1] pci 0000:00:02.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 16.464990][ T1] pci 0000:00:02.0: reg 0x30: [mem 0x00000000-0x0003ffff pref] [ 16.553129][ T1] pci 0000:00:02.0: BAR 6: assigned [mem 0x40000000-0x4003ffff pref] [ 16.554408][ T1] pci 0000:00:01.0: BAR 4: assigned [mem 0x40040000-0x40043fff 64bit pref] [ 16.555561][ T1] pci 0000:00:02.0: BAR 4: assigned [mem 0x40044000-0x40047fff 64bit pref] [ 16.556161][ T1] pci 0000:00:02.0: BAR 1: assigned [mem 0x40048000-0x40048fff] [ 16.556671][ T1] pci 0000:00:01.0: BAR 0: assigned [io 0x0000-0x001f] [ 16.557089][ T1] pci 0000:00:02.0: BAR 0: assigned [io 0x0020-0x003f] [ 16.906826][ T1] virtio-pci 0000:00:01.0: enabling device (0000 -> 0003) [ 16.960530][ T1] virtio-pci 0000:00:02.0: enabling device (0000 -> 0003) [ 31.942986][ T1] N_HDLC line discipline registered with maxframe=4096 [ 31.945179][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 32.563000][ T1] printk: console [ttyS0] disabled [ 32.583356][ T1] 10000000.uart: ttyS0 at MMIO 0x10000000 (irq = 4, base_baud = 230400) is a 16550A [ 32.610463][ T658] printk: console [ttyS0] printing thread started [ 32.613273][ T1] printk: console [ttyS0] enabled [ 915.452270][ T27] INFO: task swapper/0:1 blocked for more than 450 seconds. [ 915.455673][ T27] Not tainted 5.19.0-rc1-syzkaller-00001-gdc5cb7a833e8 #0 [ 915.456779][ T27] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 915.463501][ T27] task:swapper/0 state:D stack: 0 pid: 1 ppid: 0 flags:0x00000000 [ 915.465730][ T27] Call Trace: [ 915.466763][ T27] [] schedule+0x74/0x120 [ 915.471654][ T27] [] schedule_preempt_disabled+0x16/0x28 [ 915.472654][ T27] [] __mutex_lock+0x520/0xb3c [ 915.473561][ T27] [] mutex_lock_nested+0x14/0x1c [ 915.474438][ T27] [] add_early_randomness+0x2c/0x162 [ 915.475375][ T27] [] hwrng_register+0x2d0/0x380 [ 915.476272][ T27] [] virtrng_scan+0x2c/0x6c [ 915.477152][ T27] [] virtio_dev_probe+0x48e/0x742 [ 915.481210][ T27] [] really_probe+0x194/0x7c0 [ 915.482754][ T27] [] __driver_probe_device+0x24a/0x2d4 [ 915.484286][ T27] [] driver_probe_device+0x60/0x1a4 [ 915.485792][ T27] [] __driver_attach+0x178/0x368 [ 915.487215][ T27] [] bus_for_each_dev+0x122/0x194 [ 915.490505][ T27] [] driver_attach+0x32/0x3c [ 915.492096][ T27] [] bus_add_driver+0x2cc/0x432 [ 915.493516][ T27] [] driver_register+0x144/0x28a [ 915.494878][ T27] [] register_virtio_driver+0x5e/0x8c [ 915.496390][ T27] [] virtio_rng_driver_init+0x20/0x28 [ 915.500923][ T27] [] do_one_initcall+0x13c/0x7f0 [ 915.502707][ T27] [] kernel_init_freeable+0x510/0x5b4 [ 915.504213][ T27] [] kernel_init+0x28/0x21c [ 915.505656][ T27] [] ret_from_exception+0x0/0x10 [ 915.510029][ T27] [ 915.510029][ T27] Showing all locks held in the system: [ 915.510695][ T27] 2 locks held by swapper/0/1: [ 915.511278][ T27] #0: ff6000000e6f8170 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x170/0x368 [ 915.515359][ T27] #1: ffffffff85071828 (reading_mutex){+.+.}-{3:3}, at: add_early_randomness+0x2c/0x162 [ 915.520389][ T27] 1 lock held by khungtaskd/27: [ 915.521559][ T27] #0: ffffffff84d7a080 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x40/0x1e2 [ 915.524903][ T27] 2 locks held by kworker/u4:4/49: [ 915.526058][ T27] #0: ff60000007e29138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x512/0xfc8 [ 915.530895][ T27] #1: ff20000000577cf0 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x512/0xfc8 [ 915.534439][ T27] 1 lock held by hwrng/671: [ 915.535527][ T27] #0: ffffffff85071828 (reading_mutex){+.+.}-{3:3}, at: hwrng_fillfn+0xda/0x2a2 [ 915.540209][ T27] [ 915.540498][ T27] ============================================= [ 915.540498][ T27] [ 915.541217][ T27] Kernel panic - not syncing: hung_task: blocked tasks [ 915.541821][ T27] CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.19.0-rc1-syzkaller-00001-gdc5cb7a833e8 #0 [ 915.542357][ T27] Hardware name: riscv-virtio,qemu (DT) [ 915.542634][ T27] Call Trace: [ 915.542866][ T27] [] dump_backtrace+0x2e/0x3c [ 915.543427][ T27] [] show_stack+0x34/0x40 [ 915.543427][ T27] [] show_stack+0x34/0x40 [ 915.543889][ T27] [] dump_stack_lvl+0xe4/0x150 [ 915.544320][ T27] [] dump_stack+0x1c/0x24 [ 915.544736][ T27] [] panic+0x278/0x664 [ 915.545202][ T27] [] touch_softlockup_watchdog+0x0/0x7a [ 915.545789][ T27] [] kthread+0x19e/0x1fa [ 915.546241][ T27] [] ret_from_exception+0x0/0x10 [ 915.547104][ T27] SMP: stopping secondary CPUs