watchdog: BUG: soft lockup - CPU#1 stuck for 226s! [syz.2.437:1940] Modules linked in: CPU: 1 PID: 1940 Comm: syz.2.437 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] RIP: 0010:kvm_wait+0x105/0x150 arch/x86/kernel/kvm.c:918 Code: 21 d6 03 f4 eb 87 fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 40 38 f0 75 10 66 90 0f 00 2d 3d 21 d6 03 fb f4 5e ff ff ff fb e9 58 ff ff ff e8 7b 8f 7c 03 89 f9 80 e1 07 38 RSP: 0018:ffffc90000c874e0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffffffff870fd640 RCX: 00000000870fd600 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffffff870fd640 RBP: ffffc90000c87570 R08: 0000000000000000 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff0e1fac8 R12: ffff88823ff52b00 R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff92000190e9c FS: 000055558aca3500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f397bd0fd58 CR3: 0000000159a1a000 CR4: 00000000003506a0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:597 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x605/0x9b0 kernel/locking/qspinlock.c:508 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline] do_raw_spin_lock include/linux/spinlock.h:188 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0xe4/0xf0 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:364 [inline] preload_this_cpu_lock mm/vmalloc.c:1519 [inline] alloc_vmap_area+0x217/0x1a70 mm/vmalloc.c:1561 __get_vm_area_node+0x14e/0x350 mm/vmalloc.c:2447 __vmalloc_node_range+0xe8/0xad0 mm/vmalloc.c:3107 alloc_thread_stack_node kernel/fork.c:258 [inline] dup_task_struct+0x41e/0xc50 kernel/fork.c:949 copy_process+0x5e0/0x3280 kernel/fork.c:2182 kernel_clone+0x233/0x960 kernel/fork.c:2742 __do_sys_clone3 kernel/fork.c:3026 [inline] __se_sys_clone3 kernel/fork.c:3010 [inline] __x64_sys_clone3+0x2da/0x370 kernel/fork.c:3010 x64_sys_call+0x53e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:436 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f397d71ac49 Code: 90 b8 01 00 00 00 b9 01 00 00 00 eb ec 0f 1f 40 00 b8 ea ff ff ff 48 85 ff 74 28 48 85 d2 74 23 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 14 74 01 c3 31 ed 4c 89 c7 ff d2 48 89 c7 b8 3c 00 00 RSP: 002b:00007ffd3f3fa378 EFLAGS: 00000202 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f397d6d61e0 RCX: 00007f397d71ac49 RDX: 00007f397d6d61e0 RSI: 0000000000000058 RDI: 00007ffd3f3fa3d0 RBP: 00007f397bd0f6c0 R08: 00007f397bd0f6c0 R09: 00007ffd3f3fa4b7 R10: 0000000000000008 R11: 0000000000000202 R12: ffffffffffffffe8 R13: 000000000000006e R14: 00007ffd3f3fa3d0 R15: 00007ffd3f3fa4b8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1950 Comm: syz.0.440 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20 arch/x86/include/asm/idtentry.h:675 Code: e8 65 bd ed ff e9 b0 04 00 00 0f 01 ca fc 6a ff e8 b5 03 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7 e8 85 bc ed ff e9 90 04 00 00 <0f> 01 ca fc 6a ff e8 95 03 00 00 48 89 c4 48 8d 6c 24 01 48 89 e7 RSP: 0018:ffffc90000006fd8 EFLAGS: 00000002 RAX: ffffc9000000736d RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff85092b2c RDI: ffffc9000000736e RBP: ffffc90000007030 R08: ffffc9000000736d R09: 1ffff92000000e6d R10: dffffc0000000000 R11: fffff52000000e6e R12: 0000000000000000 R13: ffffffff827180de R14: ffffffff85092b2b R15: ffffc9000000736d FS: 00007f7bbbc7e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000084a000 CR3: 0000000131d06000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: vsnprintf+0x14e/0x1990 lib/vsprintf.c:2773 sprintf+0xe4/0x140 lib/vsprintf.c:3013 print_time kernel/printk/printk.c:1283 [inline] info_print_prefix+0x17f/0x480 kernel/printk/printk.c:1312 record_print_text kernel/printk/printk.c:1361 [inline] console_unlock+0x575/0xf10 kernel/printk/printk.c:2751 vprintk_emit+0x13f/0x320 kernel/printk/printk.c:2294 vprintk_default+0x26/0x30 kernel/printk/printk.c:2309 vprintk+0x7a/0x80 kernel/printk/printk_safe.c:45 _printk+0xda/0x130 kernel/printk/printk.c:2319 br_fdb_update+0x561/0x5b0 net/bridge/br_fdb.c:596 br_handle_frame_finish+0x26e/0x1130 net/bridge/br_input.c:106 nf_hook_bridge_pre net/bridge/br_input.c:264 [inline] br_handle_frame+0x61a/0xfd0 net/bridge/br_input.c:384 __netif_receive_skb_core+0xe6c/0x2fb0 net/core/dev.c:5453 __netif_receive_skb_one_core net/core/dev.c:5557 [inline] __netif_receive_skb+0x72/0x280 net/core/dev.c:5673 process_backlog+0x351/0x600 net/core/dev.c:6550 __napi_poll+0xbb/0x580 net/core/dev.c:7109 napi_poll net/core/dev.c:7176 [inline] net_rx_action+0x37f/0x910 net/core/dev.c:7266 handle_softirqs+0x250/0x560 kernel/softirq.c:583 __do_softirq kernel/softirq.c:621 [inline] invoke_softirq kernel/softirq.c:443 [inline] __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670 irq_exit_rcu+0x9/0x10 kernel/softirq.c:682 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline] sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:__sanitizer_cov_trace_pc+0x59/0x60 kernel/kcov.c:214 Code: 2c 8b 91 38 0b 00 00 83 fa 02 75 21 48 8b 91 40 0b 00 00 48 8b 32 48 8d 7e 01 8b 89 3c 0b 00 00 48 39 cf 73 08 48 89 44 f2 08 <48> 89 3a 5d c3 66 90 55 48 89 e5 48 8b 45 08 65 48 8b 0d 60 c1 98 RSP: 0018:ffffc90000ba7040 EFLAGS: 00000287 RAX: ffffffff81adc9db RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc9000136b000 RSI: 0000000000001e26 RDI: 0000000000001e27 RBP: ffffc90000ba7040 R08: ffffea00042b59f7 R09: 1ffffd4000856b3e R10: dffffc0000000000 R11: fffff94000856b3f R12: dffffc0000000000 R13: 1ffffd4000856b3b R14: 000000000010ad67 R15: ffffea00042b59c0 __reset_page_owner+0x1b/0x190 mm/page_owner.c:149 reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1474 [inline] free_pcp_prepare mm/page_alloc.c:1546 [inline] free_unref_page_prepare+0x5fa/0x600 mm/page_alloc.c:3536 free_unref_page+0xae/0x540 mm/page_alloc.c:3618 free_the_page mm/page_alloc.c:805 [inline] __free_pages+0x6c/0x100 mm/page_alloc.c:5900 free_pages+0x82/0x90 mm/page_alloc.c:5911 kasan_depopulate_vmalloc_pte+0x6b/0x90 mm/kasan/shadow.c:354 apply_to_pte_range mm/memory.c:2645 [inline] apply_to_pmd_range mm/memory.c:2689 [inline] apply_to_pud_range mm/memory.c:2725 [inline] apply_to_p4d_range mm/memory.c:2761 [inline] __apply_to_page_range+0x8ca/0xc70 mm/memory.c:2797 apply_to_existing_page_range+0x38/0x50 mm/memory.c:2830 kasan_release_vmalloc+0x97/0xb0 mm/kasan/shadow.c:464 __purge_vmap_area_lazy+0xa8d/0x1890 mm/vmalloc.c:1723 _vm_unmap_aliases+0x2f1/0x370 mm/vmalloc.c:2126 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:2149 change_page_attr_set_clr+0x317/0xc30 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_clear arch/x86/mm/pat/set_memory.c:1797 [inline] set_memory_ro+0x89/0xd0 arch/x86/mm/pat/set_memory.c:1943 bpf_jit_binary_lock_ro include/linux/filter.h:919 [inline] bpf_int_jit_compile+0xbf12/0xc4c0 arch/x86/net/bpf_jit_comp.c:2478 bpf_prog_select_runtime+0x6ea/0x9e0 kernel/bpf/core.c:1947 bpf_prog_load+0x10f4/0x1620 kernel/bpf/syscall.c:2332 __sys_bpf+0x51d/0x7d0 kernel/bpf/syscall.c:4633 __do_sys_bpf kernel/bpf/syscall.c:4737 [inline] __se_sys_bpf kernel/bpf/syscall.c:4735 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:4735 x64_sys_call+0x4b9/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f7bbd223e59 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7bbbc7e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7bbd49cfa0 RCX: 00007f7bbd223e59 RDX: 0000000000000070 RSI: 00002000000000c0 RDI: 0000000000000005 RBP: 00007f7bbd2b9e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7bbd49d038 R14: 00007f7bbd49cfa0 R15: 00007fff40c57d88