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 8. Fallback order for Node 0: 0 1 Fallback order for Node 1: 1 0 Built 2 zonelists, mobility grouping on. Total pages: 524155 Policy zone: DMA32 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 ** ********************************************************** SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=2 allocated 41943040 bytes of page_ext Node 0, zone DMA: page owner found early allocated 0 pages Node 0, zone DMA32: page owner found early allocated 5950 pages Node 1, zone DMA32: page owner found early allocated 4487 pages Dynamic Preempt: full Running RCU self tests Running RCU synchronous self tests rcu: Preemptible hierarchical RCU implementation. rcu: RCU lockdep checking is enabled. rcu: RCU callback double-/use-after-free debug is enabled. rcu: RCU debug extended QS entry/exit. All grace periods are expedited (rcu_expedited). Trampoline variant of Tasks RCU enabled. Tracing variant of Tasks RCU enabled. rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. Running RCU synchronous self tests RCU Tasks: Setting shift to 3 and lim to 1 rcu_task_cb_adjust=1 rcu_task_cpu_ids=8. NR_IRQS: 4352, nr_irqs: 488, preallocated irqs: 16 rcu: srcu_init: Setting srcu_struct sizes based on contention. clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns ============================= [ BUG: Invalid wait context ] syzkaller #0 Not tainted ----------------------------- swapper/0/0 is trying to lock: ffffffff8e8251e0 (clocksource_mutex){....}-{4:4}, at: __clocksource_register_scale+0x46c/0xc10 kernel/time/clocksource.c:1319 other info that might help us debug this: context-{5:5} 1 lock held by swapper/0/0: #0: ffffffff9b1e03f0 (&tkd->lock){....}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:571 [inline] #0: ffffffff9b1e03f0 (&tkd->lock){....}-{2:2}, at: timekeeping_init+0x29c/0x440 kernel/time/timekeeping.c:2064 stack backtrace: CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4830 [inline] check_wait_context kernel/locking/lockdep.c:4902 [inline] __lock_acquire+0xf75/0x1a40 kernel/locking/lockdep.c:5187 lock_acquire kernel/locking/lockdep.c:5868 [inline] lock_acquire+0x1b9/0x370 kernel/locking/lockdep.c:5825 __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x1a4/0x1bd0 kernel/locking/mutex.c:821 __clocksource_register_scale+0x46c/0xc10 kernel/time/clocksource.c:1319 __clocksource_register include/linux/clocksource.h:273 [inline] clocksource_default_clock+0x48/0x70 kernel/time/jiffies.c:68 timekeeping_init+0x2aa/0x440 kernel/time/timekeeping.c:2068 start_kernel+0x28a/0x490 init/main.c:1087 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0x12b/0x130 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x158 kfence: initialized - using 2097152 bytes for 255 objects at 0xffff88807ac00000-0xffff88807ae00000 Console: colour VGA+ 80x25 printk: legacy console [ttyS0] enabled printk: legacy console [ttyS0] enabled printk: legacy bootconsole [earlyser0] disabled printk: legacy bootconsole [earlyser0] disabled Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar ... MAX_LOCKDEP_SUBCLASSES: 8 ... MAX_LOCK_DEPTH: 48 ... MAX_LOCKDEP_KEYS: 8192 ... CLASSHASH_SIZE: 4096 ... MAX_LOCKDEP_ENTRIES: 1048576 ... MAX_LOCKDEP_CHAINS: 1048576 ... CHAINHASH_SIZE: 524288 memory used by lock dependency info: 106625 kB memory used for stack traces: 8320 kB per task-struct memory footprint: 1920 bytes mempolicy: Enabling automatic NUMA balancing. Configure with numa_balancing= or the kernel.numa_balancing sysctl ACPI: Core revision 20260408 clocksource: hpet: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604467 ns APIC: Switch to symmetric I/O mode setup DMAR: Host address width 48 DMAR: DRHD base: 0x000000fed90000 flags: 0x0 DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap d2008c222f0606 ecap f00f5e DMAR: ATSR flags: 0x1 DMAR-IR: IOAPIC id 0 under DRHD base 0xfed90000 IOMMU 0 DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping. DMAR-IR: Enabled IRQ remapping in x2apic mode x2apic enabled APIC: Switched APIC routing to: cluster x2apic kvm-guest: APIC: send_IPI_mask() replaced with kvm_send_ipi_mask() kvm-guest: APIC: send_IPI_mask_allbutself() replaced with kvm_send_ipi_mask_allbutself() kvm-guest: setup PV IPIs ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1 clocksource: tsc-early: mask: 0xffffffffffffffff max_cycles: 0x257a6033c4e, max_idle_ns: 440795327976 ns Calibrating delay loop (skipped) preset value.. 5200.07 BogoMIPS (lpj=26000380) x86/cpu: User Mode Instruction Prevention (UMIP) activated numa_add_cpu cpu 0 node 0: mask now 0 numa_add_cpu cpu 0 node 1: mask now 0 Last level iTLB entries: 4KB 0, 2MB 0, 4MB 0 Last level dTLB entries: 4KB 0, 2MB 0, 4MB 0, 1GB 0 mitigations: Enabled attack vectors: user_kernel, user_user, guest_host, guest_guest, SMT mitigations: auto Speculative Store Bypass: Mitigation: Speculative Store Bypass disabled via prctl Spectre V2 : Mitigation: Enhanced / Automatic IBRS ITS: Mitigation: Aligned branch/return thunks Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization Spectre V2 : WARNING: Unprivileged eBPF is enabled with eIBRS on, data leaks possible via Spectre v2 BHB attacks! Spectre V2 : Spectre v2 / PBRSB-eIBRS: Retire a single CALL on VMEXIT Spectre V2 : mitigation: Enabling conditional Indirect Branch Prediction Barrier active return thunk: its_return_thunk Spectre V2 : Spectre BHI mitigation: SW BHB clearing on syscall and VM exit x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers' x86/fpu: Supporting XSAVE feature 0x020: 'AVX-512 opmask' x86/fpu: Supporting XSAVE feature 0x040: 'AVX-512 Hi256' x86/fpu: Supporting XSAVE feature 0x080: 'AVX-512 ZMM_Hi256' x86/fpu: xstate_offset[2]: 576, xstate_sizes[2]: 256 x86/fpu: xstate_offset[5]: 832, xstate_sizes[5]: 64 x86/fpu: xstate_offset[6]: 896, xstate_sizes[6]: 512 x86/fpu: xstate_offset[7]: 1408, xstate_sizes[7]: 1024 x86/fpu: Enabled xstate features 0xe7, context size is 2432 bytes, using 'compacted' format. pid_max: default: 32768 minimum: 301 landlock: Up and running. Yama: becoming mindful. TOMOYO Linux initialized AppArmor: AppArmor initialized LSM support for eBPF active Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes, vmalloc hugepage) Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes, vmalloc) Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, vmalloc) Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, vmalloc) VFS: Finished mounting rootfs on nullfs Running RCU synchronous self tests Running RCU synchronous self tests numa_add_cpu cpu 2 node 0: mask now 0,2 numa_add_cpu cpu 2 node 1: mask now 0,2 numa_add_cpu cpu 1 node 0: mask now 0-2 numa_add_cpu cpu 1 node 1: mask now 0-2 numa_add_cpu cpu 3 node 0: mask now 0-3 numa_add_cpu cpu 3 node 1: mask now 0-3