watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.1.7042:3089] Modules linked in: irq event stamp: 14497529 hardirqs last enabled at (14497528): [] irqentry_exit+0x5dd/0x660 kernel/entry/common.c:219 hardirqs last disabled at (14497529): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (13840684): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (13840684): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (13840684): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (13840687): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (13840687): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (13840687): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 3089 Comm: syz.1.7042 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:kernel_text_address+0x0/0xe0 kernel/extable.c:95 Code: 20 ca 08 c2 0f b6 c2 5b e9 0d 53 bf 09 cc 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <0f> 1f 40 d6 55 41 56 53 48 81 ff 00 00 00 81 0f 93 c0 48 81 ff 50 RSP: 0018:ffffc900000073f0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffffff89fc7ff5 RCX: 79a6b42cd46fa700 RDX: 0000000000000004 RSI: ffffffff8d95208b RDI: ffffffff89fc7ff5 RBP: ffffc900000074b0 R08: ffffc90000007880 R09: 0000000000000000 R10: ffffc90000007478 R11: fffff52000000e91 R12: ffff88802ab99e80 R13: ffff8880322a5500 R14: dffffc0000000000 R15: 1ffff92000000e8e FS: 00007f85e3b3f6c0(0000) GS:ffff8881260b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6cac9d9f98 CR3: 0000000031f22000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff1 DR7: 0000000000000600 Call Trace: __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:385 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4948 [inline] slab_alloc_node mm/slub.c:5258 [inline] kmem_cache_alloc_noprof+0x367/0x6f0 mm/slub.c:5265 dst_alloc+0x105/0x170 net/core/dst.c:89 ip6_dst_alloc net/ipv6/route.c:342 [inline] icmp6_dst_alloc+0x75/0x420 net/ipv6/route.c:3322 ndisc_send_skb+0x3f1/0x1510 net/ipv6/ndisc.c:491 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x16e/0x590 kernel/time/timer.c:1748 expire_timers kernel/time/timer.c:1799 [inline] __run_timers kernel/time/timer.c:2373 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2385 run_timer_base kernel/time/timer.c:2394 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2404 handle_softirqs+0x27d/0x850 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:337 [inline] RIP: 0010:smp_call_function_single+0x35d/0x590 kernel/smp.c:687 Code: 03 42 0f b6 04 28 84 c0 0f 85 64 01 00 00 8b 7c 24 04 66 89 7b 0e 48 89 de e8 4f 02 00 00 41 89 c4 45 85 ff 74 44 44 89 24 24 <0f> 1f 44 00 00 4d 89 f7 48 83 c3 08 49 89 dc 49 c1 ec 03 43 0f b6 RSP: 0018:ffffc9000c68fac0 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffffc9000c68fb00 RCX: 79a6b42cd46fa700 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000c68fbb0 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: 0000000000000000 R13: dffffc0000000000 R14: 1ffff920018d1f5c R15: 0000000000000001 cpu_function_call kernel/events/core.c:155 [inline] perf_install_in_context+0x519/0x8f0 kernel/events/core.c:3066 __do_sys_perf_event_open kernel/events/core.c:13816 [inline] __se_sys_perf_event_open+0x1966/0x1d90 kernel/events/core.c:13458 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f85e2d8f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f85e3b3f038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f85e2fe6180 RCX: 00007f85e2d8f749 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000200000000780 RBP: 00007f85e2e13f91 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f85e2fe6218 R14: 00007f85e2fe6180 R15: 00007fffb49e1c58 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 1307 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217 Code: 24 65 48 8b 0c 25 08 f0 76 92 65 8b 15 98 a4 b5 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 6c 16 00 00 00 74 2c <8b> 91 48 16 00 00 83 fa 02 75 21 48 8b 91 50 16 00 00 48 8b 32 48 RSP: 0000:ffffc900044af6f8 EFLAGS: 00000246 RAX: ffffffff81b5bba7 RBX: 1ffff11017108545 RCX: ffff888020793d00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900044af880 R08: ffffffff8f805a77 R09: 1ffffffff1f00b4e R10: dffffc0000000000 R11: fffffbfff1f00b4f R12: ffff8880b8842a28 R13: dffffc0000000000 R14: ffff8880b893b9c0 R15: 0000000000000000 FS: 000055557f2c7500(0000) GS:ffff8881261b1000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055557f2e25c8 CR3: 000000002779a000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: csd_lock_wait kernel/smp.c:342 [inline] smp_call_function_many_cond+0xce7/0x12b0 kernel/smp.c:877 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1382 [inline] flush_tlb_mm_range+0x6b1/0x1280 arch/x86/mm/tlb.c:1472 flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline] ptep_clear_flush+0x120/0x170 mm/pgtable-generic.c:101 wp_page_copy mm/memory.c:3746 [inline] do_wp_page+0x1bb1/0x5810 mm/memory.c:4141 handle_pte_fault mm/memory.c:6250 [inline] __handle_mm_fault+0x10b5/0x5420 mm/memory.c:6366 handle_mm_fault+0x40a/0x8e0 mm/memory.c:6535 do_user_addr_fault+0xa7c/0x1380 arch/x86/mm/fault.c:1336 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x82/0x100 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0033:0x7f85e2d4daaf Code: 8d 34 19 48 39 d5 48 89 75 60 0f 95 c2 48 29 d8 48 83 c1 10 0f b6 d2 48 83 c8 01 48 c1 e2 02 48 09 da 48 83 ca 01 48 89 51 f8 <48> 89 46 08 eb 80 48 8d 0d 51 00 0f 00 48 8d 15 55 12 0f 00 bf 01 RSP: 002b:00007fffb49e1e80 EFLAGS: 00010206 RAX: 0000000000018a41 RBX: 0000000000008040 RCX: 000055557f2da590 RDX: 0000000000008041 RSI: 000055557f2e25c0 RDI: 0000000000000004 RBP: 00007f85e2fbacc0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000802 R12: 0000000000008030 R13: 0000000000000076 R14: 00007f85e2fbad20 R15: 0000000000000000