[ 0.000000][ T0] Booting Linux on physical CPU 0x0000000000 [0x411fd070] [ 0.000000][ T0] Linux version 5.12.0-rc2-syzkaller-00395-g344178334b09 (syzkaller@syzkaller) (aarch64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1) #0 SMP PREEMPT now [ 0.000000][ T0] Machine model: linux,dummy-virt [ 0.000000][ T0] efi: UEFI not found. [ 0.000000][ T0] NUMA: No NUMA configuration found [ 0.000000][ T0] NUMA: Faking a node at [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000][ T0] NUMA: NODE_DATA [mem 0xbfc23ec0-0xbfc26fff] [ 0.000000][ T0] Zone ranges: [ 0.000000][ T0] DMA [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000][ T0] DMA32 empty [ 0.000000][ T0] Normal empty [ 0.000000][ T0] Device empty [ 0.000000][ T0] Movable zone start for each node [ 0.000000][ T0] Early memory node ranges [ 0.000000][ T0] node 0: [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000][ T0] Initmem setup node 0 [mem 0x0000000040000000-0x00000000bfffffff] [ 0.000000][ T0] cma: Reserved 32 MiB at 0x00000000bbc00000 [ 0.000000][ T0] kasan: KernelAddressSanitizer initialized [ 0.000000][ T0] psci: probing for conduit method from DT. [ 0.000000][ T0] psci: PSCIv0.2 detected in firmware. [ 0.000000][ T0] psci: Using standard PSCI v0.2 function IDs [ 0.000000][ T0] psci: Trusted OS migration not required [ 0.000000][ T0] percpu: Embedded 41 pages/cpu s128904 r8192 d30840 u167936 [ 0.000000][ T0] Detected PIPT I-cache on CPU0 [ 0.000000][ T0] CPU features: detected: ARM erratum 832075 [ 0.000000][ T0] CPU features: detected: ARM erratum 834220 [ 0.000000][ T0] CPU features: detected: Spectre-v2 [ 0.000000][ T0] CPU features: detected: Spectre-v4 [ 0.000000][ T0] CPU features: detected: ARM errata 1165522, 1319367, or 1530923 [ 0.000000][ T0] Built 1 zonelists, mobility grouping on. Total pages: 516096 [ 0.000000][ T0] Policy zone: DMA [ 0.000000][ T0] Kernel command line: earlyprintk=serial oops=panic nmi_watchdog=panic panic_on_warn=1 panic=1 ftrace_dump_on_oops=orig_cpu vsyscall=native net.ifnames=0 biosdevname=0 root=/dev/vda console=ttyAMA0 [ 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] Memory: 1561452K/2097152K available (94144K kernel code, 27136K rwdata, 31816K rodata, 2176K init, 14234K bss, 502932K reserved, 32768K cma-reserved) [ 0.000000][ T0] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 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 enabled. [ 0.000000][ T0] rcu: RCU debug extended QS entry/exit. [ 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] GIC: Using split EOI/Deactivate mode [ 0.000000][ T0] GICv2m: range[mem 0x08020000-0x08020fff], SPI[80:143] [ 0.000000][ T0] random: get_random_bytes called from start_kernel+0x200/0x3e8 with crng_init=0 [ 0.000000][ T0] arch_timer: cp15 timer(s) running at 62.50MHz (phys). [ 0.000000][ T0] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x1cd42e208c, max_idle_ns: 881590405314 ns [ 0.000178][ T0] sched_clock: 56 bits at 62MHz, resolution 16ns, wraps every 4398046511096ns [ 0.030584][ T0] Console: colour dummy device 80x25 [ 0.032772][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.033021][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.033202][ T0] ... MAX_LOCK_DEPTH: 48 [ 0.033380][ T0] ... MAX_LOCKDEP_KEYS: 8192 [ 0.033551][ T0] ... CLASSHASH_SIZE: 4096 [ 0.033724][ T0] ... MAX_LOCKDEP_ENTRIES: 32768 [ 0.033912][ T0] ... MAX_LOCKDEP_CHAINS: 65536 [ 0.034087][ T0] ... CHAINHASH_SIZE: 32768 [ 0.034258][ T0] memory used by lock dependency info: 6365 kB [ 0.034432][ T0] memory used for stack traces: 4224 kB [ 0.034605][ T0] per task-struct memory footprint: 1920 bytes [ 0.042300][ T0] Calibrating delay loop (skipped), value calculated using timer frequency.. 125.00 BogoMIPS (lpj=625000) [ 0.043004][ T0] pid_max: default: 32768 minimum: 301 [ 0.047954][ T0] LSM: Security Framework initializing [ 0.050430][ T0] Yama: becoming mindful. [ 0.055218][ T0] TOMOYO Linux initialized [ 0.057349][ T0] SELinux: Initializing. [ 0.062058][ T0] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) [ 0.062498][ T0] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) [ 0.285253][ T1] Running RCU-tasks wait API self tests [ 0.455685][ T1] rcu: Hierarchical SRCU implementation. [ 0.459642][ T10] Callback from call_rcu_tasks_trace() invoked. [ 0.552856][ T1] EFI services will not be available. [ 0.581089][ T1] smp: Bringing up secondary CPUs ... [ 0.621326][ T0] Detected PIPT I-cache on CPU1 [ 0.624386][ T0] CPU1: Booted secondary processor 0x0000000001 [0x411fd070] [ 0.663241][ T1] smp: Brought up 1 node, 2 CPUs [ 0.663823][ T1] SMP: Total of 2 processors activated. [ 0.664129][ T1] CPU features: detected: 32-bit EL0 Support [ 0.664427][ T1] CPU features: detected: CRC32 instructions [ 0.664735][ T1] CPU features: detected: 32-bit EL1 Support [ 0.704069][ T9] Callback from call_rcu_tasks() invoked. [ 1.702049][ T1] CPU: All CPU(s) started at EL2 [ 1.705113][ T14] alternatives: patching kernel code [ 1.810159][ T1] devtmpfs: initialized [ 2.476740][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 2.478033][ T1] futex hash table entries: 512 (order: 4, 65536 bytes, linear) [ 2.929868][ T1] DMI not present or invalid. [ 2.986084][ T1] NET: Registered protocol family 16 [ 3.143529][ T1] DMA: preallocated 256 KiB GFP_KERNEL pool for atomic allocations [ 3.149737][ T1] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations [ 3.161595][ T1] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations [ 3.166212][ T1] audit: initializing netlink subsys (disabled) [ 3.183173][ T33] audit: type=2000 audit(2.810:1): state=initialized audit_enabled=0 res=1 [ 3.381420][ T1] thermal_sys: Registered thermal governor 'step_wise' [ 3.381800][ T1] thermal_sys: Registered thermal governor 'power_allocator' [ 3.395489][ T1] cpuidle: using governor menu [ 3.397400][ T1] NET: Registered protocol family 42 [ 3.432296][ T1] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers. [ 3.442481][ T1] ASID allocator initialised with 65536 entries [ 3.467358][ T1] Serial: AMBA PL011 UART driver [ 4.267030][ T1] 9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 48, base_baud = 0) is a PL011 rev1 [ 4.359199][ T1] printk: console [ttyAMA0] enabled [ 17.071399][ T1] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [ 17.078814][ T1] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages [ 17.079591][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 17.080119][ T1] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages [ 17.517335][ T1] cryptd: max_cpu_qlen set to 1000 [ 18.980898][ T1] raid6: neonx8 gen() 779 MB/s [ 19.168543][ T1] raid6: neonx8 xor() 329 MB/s [ 19.347196][ T1] raid6: neonx4 gen() 786 MB/s [ 19.540770][ T1] raid6: neonx4 xor() 354 MB/s [ 19.738598][ T1] raid6: neonx2 gen() 831 MB/s [ 19.918623][ T1] raid6: neonx2 xor() 378 MB/s [ 20.101309][ T1] raid6: neonx1 gen() 652 MB/s [ 20.280796][ T1] raid6: neonx1 xor() 310 MB/s [ 20.458008][ T1] raid6: int64x8 gen() 372 MB/s [ 20.634707][ T1] raid6: int64x8 xor() 350 MB/s [ 20.812952][ T1] raid6: int64x4 gen() 587 MB/s [ 20.989861][ T1] raid6: int64x4 xor() 362 MB/s [ 21.185225][ T1] raid6: int64x2 gen() 648 MB/s [ 21.364327][ T1] raid6: int64x2 xor() 510 MB/s [ 21.544269][ T1] raid6: int64x1 gen() 422 MB/s [ 21.725928][ T1] raid6: int64x1 xor() 305 MB/s [ 21.726586][ T1] raid6: using algorithm neonx2 gen() 831 MB/s [ 21.727090][ T1] raid6: .... xor() 378 MB/s, rmw enabled [ 21.727879][ T1] raid6: using neon recovery algorithm [ 21.753679][ T1] ACPI: Interpreter disabled. [ 21.841327][ T1] iommu: Default domain type: Translated [ 21.875677][ T1] vgaarb: loaded [ 21.960711][ T1] SCSI subsystem initialized [ 22.089816][ T1] usbcore: registered new interface driver usbfs [ 22.108394][ T1] usbcore: registered new interface driver hub [ 22.115604][ T1] usbcore: registered new device driver usb [ 22.167275][ T1] pps_core: LinuxPPS API ver. 1 registered [ 22.207915][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti [ 22.226473][ T1] PTP clock support registered [ 22.260502][ T1] EDAC MC: Ver: 3.0.0 [ 22.440043][ T1] Advanced Linux Sound Architecture Driver Initialized. [ 22.557502][ T1] Bluetooth: Core ver 2.22 [ 22.571095][ T1] NET: Registered protocol family 31 [ 22.571771][ T1] Bluetooth: HCI device and connection manager initialized [ 22.573433][ T1] Bluetooth: HCI socket layer initialized [ 22.574463][ T1] Bluetooth: L2CAP socket layer initialized [ 22.577586][ T1] Bluetooth: SCO socket layer initialized [ 22.579390][ T1] NET: Registered protocol family 8 [ 22.579951][ T1] NET: Registered protocol family 20 [ 22.585349][ T1] NetLabel: Initializing [ 22.585810][ T1] NetLabel: domain hash size = 128 [ 22.590485][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO [ 22.600566][ T1] NetLabel: unlabeled traffic allowed by default [ 22.620511][ T1] nfc: nfc_init: NFC Core ver 0.1 [ 22.625638][ T1] NET: Registered protocol family 39 [ 22.657066][ T1] clocksource: Switched to clocksource arch_sys_counter [ 31.119206][ T1] VFS: Disk quotas dquot_6.6.0 [ 31.122729][ T1] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [ 31.139259][ T1] FS-Cache: Loaded [ 31.172659][ T1] CacheFiles: Loaded [ 31.198506][ T1] TOMOYO: 2.6.0 [ 31.200236][ T1] Mandatory Access Control activated. [ 31.222110][ T1] pnp: PnP ACPI: disabled [ 32.683349][ T1] NET: Registered protocol family 2 [ 32.764177][ T1] tcp_listen_portaddr_hash hash table entries: 1024 (order: 4, 81920 bytes, linear) [ 32.774036][ T1] TCP established hash table entries: 16384 (order: 5, 131072 bytes, linear) [ 32.795128][ T1] TCP bind hash table entries: 16384 (order: 8, 1179648 bytes, linear) [ 32.809777][ T1] TCP: Hash tables configured (established 16384 bind 16384) [ 32.830679][ T1] MPTCP token hash table entries: 2048 (order: 5, 180224 bytes, linear) [ 32.837678][ T1] UDP hash table entries: 1024 (order: 5, 163840 bytes, linear) [ 32.843780][ T1] UDP-Lite hash table entries: 1024 (order: 5, 163840 bytes, linear) [ 32.862140][ T1] NET: Registered protocol family 1 [ 32.906990][ T1] RPC: Registered named UNIX socket transport module. [ 32.908129][ T1] RPC: Registered udp transport module. [ 32.910069][ T1] RPC: Registered tcp transport module. [ 32.911982][ T1] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 32.959594][ T1] NET: Registered protocol family 44 [ 32.960960][ T1] PCI: CLS 0 bytes, default 64 [ 33.145369][ T1] hw perfevents: enabled with armv8_pmuv3 PMU driver, 5 counters available [ 33.169534][ T1] kvm [1]: Guests without required CPU erratum workarounds can deadlock system! [ 33.169534][ T1] Only trusted guests should be used on this system. [ 33.171702][ T1] kvm [1]: IPA Size Limit: 44 bits [ 33.457753][ T1] kvm [1]: vgic interrupt IRQ9 [ 33.467206][ T1] kvm [1]: Hyp mode initialized successfully [ 34.533826][ T1] Initialise system trusted keyrings [ 34.565363][ T1] workingset: timestamp_bits=42 max_order=19 bucket_order=0 [ 35.385352][ T1] zbud: loaded [ 35.619537][ T1] DLM installed [ 35.759575][ T1] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 35.928571][ T1] NFS: Registering the id_resolver key type [ 35.930943][ T1] Key type id_resolver registered [ 35.931669][ T1] Key type id_legacy registered [ 35.941496][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering... [ 35.962528][ T1] fuse: init (API version 7.33) [ 36.030319][ T1] 9p: Installing v9fs 9p2000 file system support [ 36.129298][ T1] NET: Registered protocol family 38 [ 36.139016][ T1] xor: measuring software checksum speed [ 36.153648][ T1] 8regs : 888 MB/sec [ 36.173313][ T1] 32regs : 611 MB/sec [ 36.193990][ T1] arm64_neon : 694 MB/sec [ 36.194828][ T1] xor: using function: 8regs (888 MB/sec) [ 36.197495][ T1] async_tx: api initialized (async) [ 36.199889][ T1] Key type asymmetric registered [ 36.201249][ T1] Asymmetric key parser 'x509' registered [ 36.201882][ T1] Asymmetric key parser 'pkcs8' registered [ 36.202273][ T1] Key type pkcs7_test registered [ 36.202626][ T1] Asymmetric key parser 'tpm_parser' registered [ 36.205182][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 244) [ 36.222497][ T1] io scheduler mq-deadline registered [ 36.224498][ T1] io scheduler kyber registered [ 36.239276][ T1] io scheduler bfq registered [ 36.343166][ T1] pl061_gpio 9030000.pl061: PL061 GPIO chip registered [ 36.474061][ T1] pci-host-generic 4010000000.pcie: host bridge /pcie@10000000 ranges: [ 36.480488][ T1] pci-host-generic 4010000000.pcie: IO 0x003eff0000..0x003effffff -> 0x0000000000 [ 36.487374][ T1] pci-host-generic 4010000000.pcie: MEM 0x0010000000..0x003efeffff -> 0x0010000000 [ 36.490135][ T1] pci-host-generic 4010000000.pcie: MEM 0x8000000000..0xffffffffff -> 0x8000000000 [ 36.492792][ T1] pci-host-generic 4010000000.pcie: Memory resource size exceeds max for 32 bits [ 36.511063][ T1] pci-host-generic 4010000000.pcie: ECAM at [mem 0x4010000000-0x401fffffff] for [bus 00-ff] [ 36.521829][ T1] pci-host-generic 4010000000.pcie: PCI host bridge to bus 0000:00 [ 36.522917][ T1] pci_bus 0000:00: root bus resource [bus 00-ff] [ 36.523548][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 36.524224][ T1] pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff] [ 36.524647][ T1] pci_bus 0000:00: root bus resource [mem 0x8000000000-0xffffffffff] [ 36.530172][ T1] pci 0000:00:00.0: [1b36:0008] type 00 class 0x060000 [ 36.553531][ T1] pci 0000:00:01.0: [1af4:1005] type 00 class 0x00ff00 [ 36.558235][ T1] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x001f] [ 36.561361][ T1] pci 0000:00:01.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 36.575054][ T1] pci 0000:00:02.0: [1af4:1000] type 00 class 0x020000 [ 36.578715][ T1] pci 0000:00:02.0: reg 0x10: [io 0x0000-0x001f] [ 36.579538][ T1] pci 0000:00:02.0: reg 0x14: [mem 0x00000000-0x00000fff] [ 36.580726][ T1] pci 0000:00:02.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 36.581485][ T1] pci 0000:00:02.0: reg 0x30: [mem 0x00000000-0x0003ffff pref] [ 36.604752][ T1] pci 0000:00:03.0: [1af4:1001] type 00 class 0x010000 [ 36.608959][ T1] pci 0000:00:03.0: reg 0x10: [io 0x0000-0x007f] [ 36.609833][ T1] pci 0000:00:03.0: reg 0x14: [mem 0x00000000-0x00000fff] [ 36.611218][ T1] pci 0000:00:03.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 36.635372][ T1] pci 0000:00:02.0: BAR 6: assigned [mem 0x10000000-0x1003ffff pref] [ 36.640702][ T1] pci 0000:00:01.0: BAR 4: assigned [mem 0x8000000000-0x8000003fff 64bit pref] [ 36.642712][ T1] pci 0000:00:02.0: BAR 4: assigned [mem 0x8000004000-0x8000007fff 64bit pref] [ 36.643670][ T1] pci 0000:00:03.0: BAR 4: assigned [mem 0x8000008000-0x800000bfff 64bit pref] [ 36.648162][ T1] pci 0000:00:02.0: BAR 1: assigned [mem 0x10040000-0x10040fff] [ 36.650622][ T1] pci 0000:00:03.0: BAR 1: assigned [mem 0x10041000-0x10041fff] [ 36.653505][ T1] pci 0000:00:03.0: BAR 0: assigned [io 0x1000-0x107f] [ 36.654246][ T1] pci 0000:00:01.0: BAR 0: assigned [io 0x1080-0x109f] [ 36.657303][ T1] pci 0000:00:02.0: BAR 0: assigned [io 0x10a0-0x10bf] [ 36.683333][ T1] usbcore: registered new interface driver udlfb [ 36.750369][ T1] uvesafb: failed to execute /sbin/v86d [ 36.751053][ T1] uvesafb: make sure that the v86d helper is installed and executable [ 36.751704][ T1] uvesafb: Getting VBE info block failed (eax=0x4f00, err=-2) [ 36.752299][ T1] uvesafb: vbe_init() failed with -22 [ 36.753724][ T1] uvesafb: probe of uvesafb.0 failed with error -22 [ 36.762754][ T1] IPMI message handler: version 39.2 [ 36.768279][ T1] ipmi device interface [ 36.771685][ T1] ipmi_si: IPMI System Interface driver [ 36.829588][ T1] ipmi_si: Unable to find any System Interface(s) [ 36.869579][ T1] EINJ: ACPI disabled. [ 37.271723][ T1] virtio-pci 0000:00:01.0: enabling device (0000 -> 0003) [ 37.320313][ T1] virtio-pci 0000:00:02.0: enabling device (0000 -> 0003) [ 37.385596][ T1] virtio-pci 0000:00:03.0: enabling device (0000 -> 0003) [ 45.337888][ T1] N_HDLC line discipline registered with maxframe=4096 [ 45.341168][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 45.624754][ T1] Cyclades driver 2.6 [ 45.648370][ T1] Initializing Nozomi driver 2.1d [ 45.674699][ T1] RocketPort device driver module, version 2.09, 12-June-2003 [ 45.680052][ T1] No rocketport ports found; unloading driver [ 45.949008][ T2293] random: fast init done [ 45.968908][ T2293] random: crng init done [ 46.030925][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0 [ 46.180855][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1 [ 46.903027][ T1] Console: switching to colour frame buffer device 128x48 [ 46.958100][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device [ 46.965279][ T1] usbcore: registered new interface driver udl [ 47.212359][ T15] cacheinfo: Unable to detect cache hierarchy for CPU 0 [ 48.090434][ T1] brd: module loaded [ 48.913650][ C0] ------------[ cut here ]------------ [ 48.914731][ C0] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x26c/0x2f4 [ 48.915729][ C0] Modules linked in: [ 48.916532][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc2-syzkaller-00395-g344178334b09 #0 [ 48.917250][ C0] Hardware name: linux,dummy-virt (DT) [ 48.917945][ C0] pstate: 20000085 (nzCv daIf -PAN -UAO -TCO BTYPE=--) [ 48.918390][ C0] pc : vkms_vblank_simulate+0x26c/0x2f4 [ 48.918804][ C0] lr : vkms_vblank_simulate+0x90/0x2f4 [ 48.919180][ C0] sp : ffff00006a693d20 [ 48.919503][ C0] x29: ffff00006a693d20 x28: ffff000011001e58 [ 48.920153][ C0] x27: dfff800000000000 x26: ffff00006a67f540 [ 48.920669][ C0] x25: 1fffe0000d4cfeb1 x24: 1fffe0000d4cfeaa [ 48.921147][ C0] x23: ffff000011000d30 x22: 0000000000fe4c00 [ 48.921611][ C0] x21: ffff00006a67f540 x20: ffff000011000e58 [ 48.922099][ C0] x19: ffff000011001e58 x18: ffff00006a6a1b48 [ 48.922570][ C0] x17: 00000000000013e8 x16: 00000000000013ec [ 48.923057][ C0] x15: ffff8000197bf810 x14: 1fffe0000d4d275a [ 48.923535][ C0] x13: 0000000000000001 x12: 0000000000000033 [ 48.924050][ C0] x11: 1fffe000015b711e x10: 0000000000000007 [ 48.924533][ C0] x9 : 1fffe000015b7130 x8 : ffff800017d14c00 [ 48.925104][ C0] x7 : 00000000f1f1f1f1 x6 : dfff800000000000 [ 48.925586][ C0] x5 : 7fffffffffffffff x4 : 0000000add50ab20 [ 48.926091][ C0] x3 : 0000000ade4ef720 x2 : 0000000add50ab20 [ 48.926586][ C0] x1 : 0000000ade4ef720 x0 : 0000000000000002 [ 48.927425][ C0] Call trace: [ 48.930000][ C0] vkms_vblank_simulate+0x26c/0x2f4 [ 48.930521][ C0] __hrtimer_run_queues+0x590/0xe40 [ 48.930855][ C0] hrtimer_interrupt+0x2d4/0x810 [ 48.931143][ C0] arch_timer_handler_phys+0x4c/0x70 [ 48.931447][ C0] handle_percpu_devid_irq+0x19c/0x330 [ 48.931753][ C0] __handle_domain_irq+0x11c/0x1f0 [ 48.932112][ C0] gic_handle_irq+0x5c/0x1b0 [ 48.932440][ C0] el1_irq+0xb4/0x180 [ 48.932738][ C0] _raw_spin_unlock_irqrestore+0x94/0x180 [ 48.933091][ C0] swake_up_one+0x130/0x1a0 [ 48.933414][ C0] rcu_gp_kthread_wake+0x80/0x114 [ 48.933723][ C0] rcu_report_qs_rsp+0xac/0x30c [ 48.934037][ C0] rcu_report_qs_rnp+0x4cc/0xa80 [ 48.934355][ C0] rcu_core+0x12e4/0x1794 [ 48.934659][ C0] rcu_core_si+0x10/0x20 [ 48.934973][ C0] _stext+0x2b4/0x1084 [ 48.935328][ C0] __irq_exit_rcu+0x46c/0x510 [ 48.935655][ C0] irq_exit+0x14/0x84 [ 48.939723][ C0] __handle_domain_irq+0x120/0x1f0 [ 48.940193][ C0] gic_handle_irq+0x5c/0x1b0 [ 48.940512][ C0] el1_irq+0xb4/0x180 [ 48.940770][ C0] lock_release+0xc8/0xa80 [ 48.941065][ C0] fs_reclaim_release+0xc0/0x100 [ 48.941354][ C0] kmem_cache_alloc+0x80/0x594 [ 48.941640][ C0] __kernfs_new_node+0xd0/0x6d0 [ 48.941952][ C0] kernfs_new_node+0x78/0x10c [ 48.942254][ C0] __kernfs_create_file+0x38/0x330 [ 48.942553][ C0] sysfs_add_file_mode_ns+0x1c4/0x424 [ 48.942900][ C0] sysfs_merge_group+0x168/0x29c [ 48.943212][ C0] dpm_sysfs_add+0x190/0x1c4 [ 48.943520][ C0] device_add+0x72c/0x15f0 [ 48.943889][ C0] device_create+0x24c/0x2e0 [ 48.944199][ C0] bdi_register_va+0x124/0x810 [ 48.944510][ C0] bdi_register+0xa4/0xe0 [ 48.944801][ C0] __device_add_disk+0x970/0xed4 [ 48.945120][ C0] device_add_disk+0x14/0x20 [ 48.945413][ C0] loop_add+0x52c/0x720 [ 48.945711][ C0] loop_init+0x1ac/0x208 [ 48.948312][ C0] do_one_initcall+0x138/0x9a0 [ 48.948639][ C0] kernel_init_freeable+0x6c4/0x72c [ 48.948969][ C0] kernel_init+0x14/0x124 [ 48.949271][ C0] ret_from_fork+0x10/0x3c [ 48.950138][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 48.950739][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.12.0-rc2-syzkaller-00395-g344178334b09 #0 [ 48.951124][ C0] Hardware name: linux,dummy-virt (DT) [ 48.951433][ C0] Call trace: [ 48.951686][ C0] dump_backtrace+0x0/0x3e0 [ 48.952044][ C0] show_stack+0x18/0x70 [ 48.952337][ C0] dump_stack+0x120/0x1a8 [ 48.952633][ C0] panic+0x31c/0x5c4 [ 48.952930][ C0] __warn+0x198/0x2f0 [ 48.953217][ C0] report_bug+0x154/0x210 [ 48.953516][ C0] bug_handler+0x38/0x90 [ 48.953797][ C0] brk_handler+0x114/0x230 [ 48.954079][ C0] do_debug_exception+0xc4/0x3b0 [ 48.954364][ C0] el1_dbg+0x60/0x80 [ 48.954661][ C0] el1_sync_handler+0x9c/0xd0 [ 48.954988][ C0] el1_sync+0x70/0x100 [ 48.955276][ C0] vkms_vblank_simulate+0x26c/0x2f4 [ 48.955605][ C0] __hrtimer_run_queues+0x590/0xe40 [ 48.957403][ C0] hrtimer_interrupt+0x2d4/0x810 [ 48.957783][ C0] arch_timer_handler_phys+0x4c/0x70 [ 48.958120][ C0] handle_percpu_devid_irq+0x19c/0x330 [ 48.958460][ C0] __handle_domain_irq+0x11c/0x1f0 [ 48.958785][ C0] gic_handle_irq+0x5c/0x1b0 [ 48.959096][ C0] el1_irq+0xb4/0x180 [ 48.959394][ C0] _raw_spin_unlock_irqrestore+0x94/0x180 [ 48.959730][ C0] swake_up_one+0x130/0x1a0 [ 48.960090][ C0] rcu_gp_kthread_wake+0x80/0x114 [ 48.960405][ C0] rcu_report_qs_rsp+0xac/0x30c [ 48.960705][ C0] rcu_report_qs_rnp+0x4cc/0xa80 [ 48.960991][ C0] rcu_core+0x12e4/0x1794 [ 48.961266][ C0] rcu_core_si+0x10/0x20 [ 48.961544][ C0] _stext+0x2b4/0x1084 [ 48.961820][ C0] __irq_exit_rcu+0x46c/0x510 [ 48.962141][ C0] irq_exit+0x14/0x84 [ 48.962446][ C0] __handle_domain_irq+0x120/0x1f0 [ 48.962743][ C0] gic_handle_irq+0x5c/0x1b0 [ 48.963102][ C0] el1_irq+0xb4/0x180 [ 48.963383][ C0] lock_release+0xc8/0xa80 [ 48.963685][ C0] fs_reclaim_release+0xc0/0x100 [ 48.964022][ C0] kmem_cache_alloc+0x80/0x594 [ 48.964331][ C0] __kernfs_new_node+0xd0/0x6d0 [ 48.964643][ C0] kernfs_new_node+0x78/0x10c [ 48.964965][ C0] __kernfs_create_file+0x38/0x330 [ 48.965285][ C0] sysfs_add_file_mode_ns+0x1c4/0x424 [ 48.965610][ C0] sysfs_merge_group+0x168/0x29c [ 48.968611][ C0] dpm_sysfs_add+0x190/0x1c4 [ 48.969017][ C0] device_add+0x72c/0x15f0 [ 48.969317][ C0] device_create+0x24c/0x2e0 [ 48.969616][ C0] bdi_register_va+0x124/0x810 [ 48.969934][ C0] bdi_register+0xa4/0xe0 [ 48.970240][ C0] __device_add_disk+0x970/0xed4 [ 48.970853][ C0] device_add_disk+0x14/0x20 [ 48.971376][ C0] loop_add+0x52c/0x720 [ 48.971728][ C0] loop_init+0x1ac/0x208 [ 48.972149][ C0] do_one_initcall+0x138/0x9a0 [ 48.972571][ C0] kernel_init_freeable+0x6c4/0x72c [ 48.972871][ C0] kernel_init+0x14/0x124 [ 48.973175][ C0] ret_from_fork+0x10/0x3c [ 48.974856][ C0] SMP: stopping secondary CPUs [ 49.001941][ C0] Dumping ftrace buffer: [ 49.003611][ C0] (ftrace buffer empty) [ 49.004654][ C0] Kernel Offset: disabled [ 49.005083][ C0] CPU features: 0x00240022,61002082 [ 49.011355][ C0] Memory Limit: none [ 49.012864][ C0] Rebooting in 1 seconds..