[ 0.000000][ T0] Booting Linux on physical CPU 0x0000000000 [0x411fd070] [ 0.000000][ T0] Linux version 5.12.0-rc2-syzkaller-00474-g9afc11637947 (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 [ 0.000179][ T0] sched_clock: 56 bits at 62MHz, resolution 16ns, wraps every 4398046511096ns [ 0.031579][ T0] Console: colour dummy device 80x25 [ 0.033637][ T0] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.033869][ T0] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.034038][ T0] ... MAX_LOCK_DEPTH: 48 [ 0.034203][ T0] ... MAX_LOCKDEP_KEYS: 8192 [ 0.034372][ T0] ... CLASSHASH_SIZE: 4096 [ 0.034537][ T0] ... MAX_LOCKDEP_ENTRIES: 32768 [ 0.034711][ T0] ... MAX_LOCKDEP_CHAINS: 65536 [ 0.034878][ T0] ... CHAINHASH_SIZE: 32768 [ 0.035042][ T0] memory used by lock dependency info: 6365 kB [ 0.035210][ T0] memory used for stack traces: 4224 kB [ 0.035378][ T0] per task-struct memory footprint: 1920 bytes [ 0.041334][ T0] Calibrating delay loop (skipped), value calculated using timer frequency.. 125.00 BogoMIPS (lpj=625000) [ 0.043064][ T0] pid_max: default: 32768 minimum: 301 [ 0.047776][ T0] LSM: Security Framework initializing [ 0.050076][ T0] Yama: becoming mindful. [ 0.054793][ T0] TOMOYO Linux initialized [ 0.056764][ T0] SELinux: Initializing. [ 0.061211][ T0] Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) [ 0.061558][ T0] Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) [ 0.268241][ T1] Running RCU-tasks wait API self tests [ 0.445951][ T1] rcu: Hierarchical SRCU implementation. [ 0.462516][ T10] Callback from call_rcu_tasks_trace() invoked. [ 0.544680][ T1] EFI services will not be available. [ 0.565140][ T1] smp: Bringing up secondary CPUs ... [ 0.609111][ T0] Detected PIPT I-cache on CPU1 [ 0.612231][ T0] CPU1: Booted secondary processor 0x0000000001 [0x411fd070] [ 0.641802][ T1] smp: Brought up 1 node, 2 CPUs [ 0.642542][ T1] SMP: Total of 2 processors activated. [ 0.642856][ T1] CPU features: detected: 32-bit EL0 Support [ 0.643230][ T1] CPU features: detected: CRC32 instructions [ 0.643559][ T1] CPU features: detected: 32-bit EL1 Support [ 0.670677][ T9] Callback from call_rcu_tasks() invoked. [ 1.635032][ T1] CPU: All CPU(s) started at EL2 [ 1.645796][ T14] alternatives: patching kernel code [ 1.774756][ T1] devtmpfs: initialized [ 2.401120][ T1] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns [ 2.402702][ T1] futex hash table entries: 512 (order: 4, 65536 bytes, linear) [ 2.750208][ T1] DMI not present or invalid. [ 2.805606][ T1] NET: Registered protocol family 16 [ 2.961027][ T1] DMA: preallocated 256 KiB GFP_KERNEL pool for atomic allocations [ 2.966994][ T1] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA pool for atomic allocations [ 2.977887][ T1] DMA: preallocated 256 KiB GFP_KERNEL|GFP_DMA32 pool for atomic allocations [ 2.983035][ T1] audit: initializing netlink subsys (disabled) [ 3.008912][ T34] audit: type=2000 audit(2.730:1): state=initialized audit_enabled=0 res=1 [ 3.244694][ T1] thermal_sys: Registered thermal governor 'step_wise' [ 3.244988][ T1] thermal_sys: Registered thermal governor 'power_allocator' [ 3.265333][ T1] cpuidle: using governor menu [ 3.267549][ T1] NET: Registered protocol family 42 [ 3.286049][ T1] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers. [ 3.289459][ T1] ASID allocator initialised with 65536 entries [ 3.301514][ T1] Serial: AMBA PL011 UART driver [ 4.074089][ T1] 9000000.pl011: ttyAMA0 at MMIO 0x9000000 (irq = 48, base_baud = 0) is a PL011 rev1 [ 4.125150][ T1] printk: console [ttyAMA0] enabled [ 16.705286][ T1] HugeTLB registered 1.00 GiB page size, pre-allocated 0 pages [ 16.707399][ T1] HugeTLB registered 32.0 MiB page size, pre-allocated 0 pages [ 16.710919][ T1] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages [ 16.712840][ T1] HugeTLB registered 64.0 KiB page size, pre-allocated 0 pages [ 17.172419][ T1] cryptd: max_cpu_qlen set to 1000 [ 18.065164][ T1] raid6: neonx8 gen() 762 MB/s [ 18.250700][ T1] raid6: neonx8 xor() 343 MB/s [ 18.432625][ T1] raid6: neonx4 gen() 825 MB/s [ 18.610470][ T1] raid6: neonx4 xor() 372 MB/s [ 18.792698][ T1] raid6: neonx2 gen() 711 MB/s [ 18.972191][ T1] raid6: neonx2 xor() 364 MB/s [ 19.153082][ T1] raid6: neonx1 gen() 635 MB/s [ 19.342468][ T1] raid6: neonx1 xor() 353 MB/s [ 19.530692][ T1] raid6: int64x8 gen() 372 MB/s [ 19.719771][ T1] raid6: int64x8 xor() 245 MB/s [ 19.903713][ T1] raid6: int64x4 gen() 545 MB/s [ 20.086217][ T1] raid6: int64x4 xor() 348 MB/s [ 20.270841][ T1] raid6: int64x2 gen() 701 MB/s [ 20.460059][ T1] raid6: int64x2 xor() 410 MB/s [ 20.645581][ T1] raid6: int64x1 gen() 413 MB/s [ 20.829369][ T1] raid6: int64x1 xor() 293 MB/s [ 20.830031][ T1] raid6: using algorithm neonx4 gen() 825 MB/s [ 20.830576][ T1] raid6: .... xor() 372 MB/s, rmw enabled [ 20.831340][ T1] raid6: using neon recovery algorithm [ 20.881914][ T1] ACPI: Interpreter disabled. [ 20.957492][ T1] iommu: Default domain type: Translated [ 20.973999][ T1] vgaarb: loaded [ 21.045875][ T1] SCSI subsystem initialized [ 21.198166][ T1] usbcore: registered new interface driver usbfs [ 21.208250][ T1] usbcore: registered new interface driver hub [ 21.218974][ T1] usbcore: registered new device driver usb [ 21.326225][ T1] pps_core: LinuxPPS API ver. 1 registered [ 21.326956][ T1] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti [ 21.346028][ T1] PTP clock support registered [ 21.379755][ T1] EDAC MC: Ver: 3.0.0 [ 21.552640][ T1] Advanced Linux Sound Architecture Driver Initialized. [ 21.687021][ T1] Bluetooth: Core ver 2.22 [ 21.691088][ T1] NET: Registered protocol family 31 [ 21.691660][ T1] Bluetooth: HCI device and connection manager initialized [ 21.693166][ T1] Bluetooth: HCI socket layer initialized [ 21.694046][ T1] Bluetooth: L2CAP socket layer initialized [ 21.698015][ T1] Bluetooth: SCO socket layer initialized [ 21.699981][ T1] NET: Registered protocol family 8 [ 21.701591][ T1] NET: Registered protocol family 20 [ 21.709825][ T1] NetLabel: Initializing [ 21.712065][ T1] NetLabel: domain hash size = 128 [ 21.713614][ T1] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO [ 21.721543][ T1] NetLabel: unlabeled traffic allowed by default [ 21.746202][ T1] nfc: nfc_init: NFC Core ver 0.1 [ 21.761713][ T1] NET: Registered protocol family 39 [ 21.778843][ T1] clocksource: Switched to clocksource arch_sys_counter [ 29.900110][ T1] VFS: Disk quotas dquot_6.6.0 [ 29.905446][ T1] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes) [ 29.932734][ T1] FS-Cache: Loaded [ 29.969992][ T1] CacheFiles: Loaded [ 30.004436][ T1] TOMOYO: 2.6.0 [ 30.006563][ T1] Mandatory Access Control activated. [ 30.032526][ T1] pnp: PnP ACPI: disabled [ 31.805134][ T1] NET: Registered protocol family 2 [ 31.894374][ T1] tcp_listen_portaddr_hash hash table entries: 1024 (order: 4, 81920 bytes, linear) [ 31.900928][ T1] TCP established hash table entries: 16384 (order: 5, 131072 bytes, linear) [ 31.924188][ T1] TCP bind hash table entries: 16384 (order: 8, 1179648 bytes, linear) [ 31.940224][ T1] TCP: Hash tables configured (established 16384 bind 16384) [ 31.956878][ T1] MPTCP token hash table entries: 2048 (order: 5, 180224 bytes, linear) [ 31.966486][ T1] UDP hash table entries: 1024 (order: 5, 163840 bytes, linear) [ 31.977209][ T1] UDP-Lite hash table entries: 1024 (order: 5, 163840 bytes, linear) [ 32.000098][ T1] NET: Registered protocol family 1 [ 32.035188][ T1] RPC: Registered named UNIX socket transport module. [ 32.038592][ T1] RPC: Registered udp transport module. [ 32.040759][ T1] RPC: Registered tcp transport module. [ 32.041221][ T1] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 32.076655][ T1] NET: Registered protocol family 44 [ 32.079070][ T1] PCI: CLS 0 bytes, default 64 [ 32.232994][ T1] hw perfevents: enabled with armv8_pmuv3 PMU driver, 5 counters available [ 32.243790][ T1] kvm [1]: Guests without required CPU erratum workarounds can deadlock system! [ 32.243790][ T1] Only trusted guests should be used on this system. [ 32.245324][ T1] kvm [1]: IPA Size Limit: 44 bits [ 32.519418][ T1] kvm [1]: vgic interrupt IRQ9 [ 32.532280][ T1] kvm [1]: Hyp mode initialized successfully [ 33.401814][ T1] Initialise system trusted keyrings [ 33.443285][ T1] workingset: timestamp_bits=42 max_order=19 bucket_order=0 [ 34.404303][ T1] zbud: loaded [ 34.664572][ T1] DLM installed [ 34.803360][ T1] squashfs: version 4.0 (2009/01/31) Phillip Lougher [ 34.977182][ T1] NFS: Registering the id_resolver key type [ 34.980615][ T1] Key type id_resolver registered [ 34.981279][ T1] Key type id_legacy registered [ 34.989597][ T1] nfs4filelayout_init: NFSv4 File Layout Driver Registering... [ 35.022039][ T1] fuse: init (API version 7.33) [ 35.094583][ T1] 9p: Installing v9fs 9p2000 file system support [ 35.224938][ T1] NET: Registered protocol family 38 [ 35.236712][ T1] xor: measuring software checksum speed [ 35.271362][ T1] 8regs : 592 MB/sec [ 35.324789][ T1] 32regs : 570 MB/sec [ 35.345334][ T1] arm64_neon : 710 MB/sec [ 35.346195][ T1] xor: using function: arm64_neon (710 MB/sec) [ 35.350812][ T1] async_tx: api initialized (async) [ 35.351822][ T1] Key type asymmetric registered [ 35.352835][ T1] Asymmetric key parser 'x509' registered [ 35.353703][ T1] Asymmetric key parser 'pkcs8' registered [ 35.354242][ T1] Key type pkcs7_test registered [ 35.354696][ T1] Asymmetric key parser 'tpm_parser' registered [ 35.364478][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 244) [ 35.383700][ T1] io scheduler mq-deadline registered [ 35.386059][ T1] io scheduler kyber registered [ 35.404508][ T1] io scheduler bfq registered [ 35.513604][ T1] pl061_gpio 9030000.pl061: PL061 GPIO chip registered [ 35.641829][ T1] pci-host-generic 4010000000.pcie: host bridge /pcie@10000000 ranges: [ 35.650905][ T1] pci-host-generic 4010000000.pcie: IO 0x003eff0000..0x003effffff -> 0x0000000000 [ 35.656730][ T1] pci-host-generic 4010000000.pcie: MEM 0x0010000000..0x003efeffff -> 0x0010000000 [ 35.660765][ T1] pci-host-generic 4010000000.pcie: MEM 0x8000000000..0xffffffffff -> 0x8000000000 [ 35.663459][ T1] pci-host-generic 4010000000.pcie: Memory resource size exceeds max for 32 bits [ 35.693144][ T1] pci-host-generic 4010000000.pcie: ECAM at [mem 0x4010000000-0x401fffffff] for [bus 00-ff] [ 35.711367][ T1] pci-host-generic 4010000000.pcie: PCI host bridge to bus 0000:00 [ 35.712873][ T1] pci_bus 0000:00: root bus resource [bus 00-ff] [ 35.713648][ T1] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] [ 35.714285][ T1] pci_bus 0000:00: root bus resource [mem 0x10000000-0x3efeffff] [ 35.714822][ T1] pci_bus 0000:00: root bus resource [mem 0x8000000000-0xffffffffff] [ 35.724274][ T1] pci 0000:00:00.0: [1b36:0008] type 00 class 0x060000 [ 35.751897][ T1] pci 0000:00:01.0: [1af4:1005] type 00 class 0x00ff00 [ 35.753801][ T1] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x001f] [ 35.758857][ T1] pci 0000:00:01.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 35.784044][ T1] pci 0000:00:02.0: [1af4:1000] type 00 class 0x020000 [ 35.787026][ T1] pci 0000:00:02.0: reg 0x10: [io 0x0000-0x001f] [ 35.788968][ T1] pci 0000:00:02.0: reg 0x14: [mem 0x00000000-0x00000fff] [ 35.792546][ T1] pci 0000:00:02.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 35.795077][ T1] pci 0000:00:02.0: reg 0x30: [mem 0x00000000-0x0003ffff pref] [ 35.822256][ T1] pci 0000:00:03.0: [1af4:1001] type 00 class 0x010000 [ 35.823702][ T1] pci 0000:00:03.0: reg 0x10: [io 0x0000-0x007f] [ 35.824472][ T1] pci 0000:00:03.0: reg 0x14: [mem 0x00000000-0x00000fff] [ 35.825650][ T1] pci 0000:00:03.0: reg 0x20: [mem 0x00000000-0x00003fff 64bit pref] [ 35.862897][ T1] pci 0000:00:02.0: BAR 6: assigned [mem 0x10000000-0x1003ffff pref] [ 35.864339][ T1] pci 0000:00:01.0: BAR 4: assigned [mem 0x8000000000-0x8000003fff 64bit pref] [ 35.865457][ T1] pci 0000:00:02.0: BAR 4: assigned [mem 0x8000004000-0x8000007fff 64bit pref] [ 35.866652][ T1] pci 0000:00:03.0: BAR 4: assigned [mem 0x8000008000-0x800000bfff 64bit pref] [ 35.867482][ T1] pci 0000:00:02.0: BAR 1: assigned [mem 0x10040000-0x10040fff] [ 35.873216][ T1] pci 0000:00:03.0: BAR 1: assigned [mem 0x10041000-0x10041fff] [ 35.875775][ T1] pci 0000:00:03.0: BAR 0: assigned [io 0x1000-0x107f] [ 35.876707][ T1] pci 0000:00:01.0: BAR 0: assigned [io 0x1080-0x109f] [ 35.877319][ T1] pci 0000:00:02.0: BAR 0: assigned [io 0x10a0-0x10bf] [ 35.933721][ T1] usbcore: registered new interface driver udlfb [ 36.000232][ T1] uvesafb: failed to execute /sbin/v86d [ 36.002733][ T1] uvesafb: make sure that the v86d helper is installed and executable [ 36.005446][ T1] uvesafb: Getting VBE info block failed (eax=0x4f00, err=-2) [ 36.006806][ T1] uvesafb: vbe_init() failed with -22 [ 36.011381][ T1] uvesafb: probe of uvesafb.0 failed with error -22 [ 36.016484][ T1] IPMI message handler: version 39.2 [ 36.023210][ T1] ipmi device interface [ 36.031832][ T1] ipmi_si: IPMI System Interface driver [ 36.076527][ T1] ipmi_si: Unable to find any System Interface(s) [ 36.155006][ T1] EINJ: ACPI disabled. [ 36.461903][ T1] virtio-pci 0000:00:01.0: enabling device (0000 -> 0003) [ 36.496354][ T1] virtio-pci 0000:00:02.0: enabling device (0000 -> 0003) [ 36.534375][ T1] virtio-pci 0000:00:03.0: enabling device (0000 -> 0003) [ 43.662480][ T1] N_HDLC line discipline registered with maxframe=4096 [ 43.666335][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 44.037464][ T1] Cyclades driver 2.6 [ 44.072416][ T1] Initializing Nozomi driver 2.1d [ 44.112552][ T1] RocketPort device driver module, version 2.09, 12-June-2003 [ 44.115025][ T1] No rocketport ports found; unloading driver [ 44.247356][ T2295] random: fast init done [ 44.263398][ T2295] random: crng init done [ 44.451865][ T1] [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0 [ 44.575370][ T1] [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1 [ 45.160345][ T1] Console: switching to colour frame buffer device 128x48 [ 45.216104][ T1] platform vkms: [drm] fb0: vkmsdrmfb frame buffer device [ 45.222010][ T1] usbcore: registered new interface driver udl [ 45.430222][ T15] cacheinfo: Unable to detect cache hierarchy for CPU 0 [ 46.233948][ T1] brd: module loaded [ 47.732459][ T1] loop: module loaded [ 48.070305][ C1] ------------[ cut here ]------------ [ 48.071731][ C1] WARNING: CPU: 1 PID: 13 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x26c/0x2f4 [ 48.072822][ C1] Modules linked in: [ 48.073593][ C1] CPU: 1 PID: 13 Comm: rcu_preempt Not tainted 5.12.0-rc2-syzkaller-00474-g9afc11637947 #0 [ 48.074304][ C1] Hardware name: linux,dummy-virt (DT) [ 48.075008][ C1] pstate: 20000085 (nzCv daIf -PAN -UAO -TCO BTYPE=--) [ 48.080955][ C1] pc : vkms_vblank_simulate+0x26c/0x2f4 [ 48.081491][ C1] lr : vkms_vblank_simulate+0x90/0x2f4 [ 48.081860][ C1] sp : ffff00006a6bd360 [ 48.082204][ C1] x29: ffff00006a6bd360 x28: ffff000010f81e58 [ 48.082782][ C1] x27: dfff800000000000 x26: ffff00006a6a8540 [ 48.083223][ C1] x25: 1fffe0000d4d50b1 x24: 1fffe0000d4d50aa [ 48.083564][ C1] x23: ffff000010f80d30 x22: 0000000000fe4c00 [ 48.083955][ C1] x21: ffff00006a6a8540 x20: ffff000010f80e58 [ 48.084371][ C1] x19: ffff000010f81e58 x18: ffff00006a6a1b48 [ 48.084801][ C1] x17: 00000000000013e8 x16: 0000000000000007 [ 48.085206][ C1] x15: ffff8000197bf810 x14: 1fffe0000d4d7a22 [ 48.085547][ C1] x13: 0000000000000001 x12: 0000000000000033 [ 48.085953][ C1] x11: 1fffe000015ca11e x10: 0000000000000007 [ 48.086636][ C1] x9 : 1fffe000015ca126 x8 : ffff800017d14c00 [ 48.087099][ C1] x7 : 00000000f1f1f1f1 x6 : dfff800000000000 [ 48.087516][ C1] x5 : 7fffffffffffffff x4 : 0000000ac7ade730 [ 48.088443][ C1] x3 : 0000000ac8ac3330 x2 : 0000000ac7ade730 [ 48.088976][ C1] x1 : 0000000ac8ac3330 x0 : 0000000000000002 [ 48.089638][ C1] Call trace: [ 48.089956][ C1] vkms_vblank_simulate+0x26c/0x2f4 [ 48.090382][ C1] __hrtimer_run_queues+0x590/0xe40 [ 48.090744][ C1] hrtimer_interrupt+0x2d4/0x810 [ 48.091079][ C1] arch_timer_handler_phys+0x4c/0x70 [ 48.091436][ C1] handle_percpu_devid_irq+0x19c/0x330 [ 48.091816][ C1] __handle_domain_irq+0x11c/0x1f0 [ 48.092134][ C1] gic_handle_irq+0x5c/0x1b0 [ 48.092483][ C1] el1_irq+0xb4/0x180 [ 48.092794][ C1] _raw_spin_unlock_irq+0x80/0x15c [ 48.093138][ C1] finish_task_switch.isra.0+0x1b0/0x690 [ 48.093510][ C1] __schedule+0x814/0x1ac0 [ 48.094914][ C1] schedule+0xac/0x230 [ 48.096538][ C1] schedule_timeout+0x104/0x1f0 [ 48.097208][ C1] rcu_gp_kthread+0x8ec/0x2e9c [ 48.097667][ C1] kthread+0x320/0x3bc [ 48.097935][ C1] ret_from_fork+0x10/0x3c [ 48.098832][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 48.099331][ C1] CPU: 1 PID: 13 Comm: rcu_preempt Not tainted 5.12.0-rc2-syzkaller-00474-g9afc11637947 #0 [ 48.099759][ C1] Hardware name: linux,dummy-virt (DT) [ 48.100050][ C1] Call trace: [ 48.100281][ C1] dump_backtrace+0x0/0x3e0 [ 48.100589][ C1] show_stack+0x18/0x70 [ 48.100865][ C1] dump_stack+0x120/0x1a8 [ 48.101153][ C1] panic+0x31c/0x5c4 [ 48.101437][ C1] __warn+0x198/0x2f0 [ 48.101716][ C1] report_bug+0x154/0x210 [ 48.102009][ C1] bug_handler+0x38/0x90 [ 48.103153][ C1] brk_handler+0x114/0x230 [ 48.103721][ C1] do_debug_exception+0xc4/0x3b0 [ 48.103994][ C1] el1_dbg+0x60/0x80 [ 48.104262][ C1] el1_sync_handler+0x9c/0xd0 [ 48.104573][ C1] el1_sync+0x70/0x100 [ 48.104879][ C1] vkms_vblank_simulate+0x26c/0x2f4 [ 48.105196][ C1] __hrtimer_run_queues+0x590/0xe40 [ 48.105523][ C1] hrtimer_interrupt+0x2d4/0x810 [ 48.105844][ C1] arch_timer_handler_phys+0x4c/0x70 [ 48.106146][ C1] handle_percpu_devid_irq+0x19c/0x330 [ 48.106476][ C1] __handle_domain_irq+0x11c/0x1f0 [ 48.106776][ C1] gic_handle_irq+0x5c/0x1b0 [ 48.107069][ C1] el1_irq+0xb4/0x180 [ 48.107346][ C1] _raw_spin_unlock_irq+0x80/0x15c [ 48.110835][ C1] finish_task_switch.isra.0+0x1b0/0x690 [ 48.111285][ C1] __schedule+0x814/0x1ac0 [ 48.111628][ C1] schedule+0xac/0x230 [ 48.111945][ C1] schedule_timeout+0x104/0x1f0 [ 48.113215][ C1] rcu_gp_kthread+0x8ec/0x2e9c [ 48.113973][ C1] kthread+0x320/0x3bc [ 48.114271][ C1] ret_from_fork+0x10/0x3c [ 48.115506][ C1] SMP: stopping secondary CPUs [ 48.117378][ C1] Dumping ftrace buffer: [ 48.118660][ C1] (ftrace buffer empty) [ 48.119438][ C1] Kernel Offset: disabled [ 48.119845][ C1] CPU features: 0x00240022,61002082 [ 48.120595][ C1] Memory Limit: none [ 48.121971][ C1] Rebooting in 1 seconds..