watchdog: BUG: soft lockup - CPU#0 stuck for 144s! [syz.1.35:6032] Modules linked in: irq event stamp: 11546143 hardirqs last enabled at (11546142): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:357 hardirqs last disabled at (11546143): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1049 softirqs last enabled at (11303580): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11303580): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11303580): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11303583): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11303583): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11303583): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 6032 Comm: syz.1.35 Not tainted 6.15.0-rc4-syzkaller-gc8ce7db0ca83 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:kasan_get_free_meta+0x0/0x30 mm/kasan/generic.c:466 Code: 8f bc 00 00 00 48 8d 04 0e 48 85 c9 48 0f 44 c1 c3 cc cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <66> 0f 1f 00 48 63 8f c0 00 00 00 48 8d 14 0e 31 c0 48 81 f9 ff ff RSP: 0018:ffffc90000007790 EFLAGS: 00000282 RAX: 00000000017c02c2 RBX: ffff888075bdc280 RCX: 0000000000001790 RDX: 0000000035ad5688 RSI: ffff888075bdc280 RDI: ffff88801e6e38c0 RBP: 0000000000000000 R08: 00000000f4efd42f R09: 00000000657b2b02 R10: 000000000000000f R11: ffffffffa0001f98 R12: ffffea0001d6f700 R13: 0000000000000000 R14: ffff88801e6e38c0 R15: ffffffff8a095a23 FS: 00007f3493f9b6c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2fc1fffc CR3: 0000000028402000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kasan_quarantine_put+0x16/0x220 mm/kasan/quarantine.c:190 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2398 [inline] slab_free mm/slub.c:4656 [inline] kmem_cache_free+0x192/0x3f0 mm/slub.c:4758 kfree_skb_reason include/linux/skbuff.h:1279 [inline] kfree_skb include/linux/skbuff.h:1288 [inline] ip6_mc_input+0x9c3/0xbe0 net/ipv6/ip6_input.c:591 NF_HOOK+0x309/0x3a0 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5887 [inline] __netif_receive_skb+0xd3/0x380 net/core/dev.c:6000 process_backlog+0x60e/0x14f0 net/core/dev.c:6352 __napi_poll+0xc4/0x480 net/core/dev.c:7324 napi_poll net/core/dev.c:7388 [inline] net_rx_action+0x6ea/0xdf0 net/core/dev.c:7510 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_irq_work arch/x86/kernel/irq_work.c:17 [inline] sysvec_irq_work+0xa3/0xc0 arch/x86/kernel/irq_work.c:17 asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:738 RIP: 0010:csd_lock_wait kernel/smp.c:-1 [inline] RIP: 0010:smp_call_function_single+0x398/0x590 kernel/smp.c:679 Code: ec 03 43 0f b6 04 2c 84 c0 0f 85 46 01 00 00 44 8b 33 44 89 f6 83 e6 01 31 ff e8 93 87 0b 00 41 83 e6 01 75 11 e8 48 83 0b 00 <4d> 89 fe eb 3f e8 3e 83 0b 00 eb 3c 4d 89 fe f3 90 43 0f b6 04 2c RSP: 0018:ffffc900045afae0 EFLAGS: 00010287 RAX: ffffffff81b43b88 RBX: ffffc900045afb28 RCX: 0000000000080000 RDX: ffffc900049c2000 RSI: 0000000000000d43 RDI: 0000000000000d44 RBP: ffffc900045afbd0 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 1ffff920008b5f65 R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff920008b5f60 task_function_call kernel/events/core.c:121 [inline] perf_install_in_context+0x590/0x8f0 kernel/events/core.c:3033 __do_sys_perf_event_open kernel/events/core.c:13410 [inline] __se_sys_perf_event_open+0x1867/0x1c80 kernel/events/core.c:13061 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f349318e969 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:00007f3493f9b038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f34933b5fa0 RCX: 00007f349318e969 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480 RBP: 00007f3493210ab1 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f34933b5fa0 R15: 00007ffcb1c5b408 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6024 Comm: syz.2.31 Not tainted 6.15.0-rc4-syzkaller-gc8ce7db0ca83 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__perf_event_overflow+0x8c6/0xe10 kernel/events/core.c:10256 Code: 84 c0 48 8b 54 24 30 0f 85 dd 02 00 00 8b 1a 89 de 83 e6 04 31 ff e8 79 79 d0 ff 83 e3 04 75 0c e8 2f 75 d0 ff 48 8b 5c 24 48 31 e8 23 75 d0 ff 49 81 c7 08 05 00 00 4c 89 f8 48 c1 e8 03 42 RSP: 0018:ffffc90000a089e0 EFLAGS: 00000006 RAX: ffffffff81ef49a1 RBX: 0000000000000000 RCX: ffff888029e1da00 RDX: 0000000000010000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90000a08af0 R08: ffffc90000a0868f R09: 0000000000000000 R10: ffffc90000a08680 R11: ffffffffa0001f98 R12: ffffc90004def0b8 R13: dffffc0000000000 R14: 1ffff92000141148 R15: ffff88805d0d55c0 FS: 0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3292954e9c CR3: 000000000dd36000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_swevent_hrtimer+0x3c2/0x540 kernel/events/core.c:11613 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1055 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline] RIP: 0010:smp_call_function_many_cond+0xe69/0x11c0 kernel/smp.c:885 Code: 00 45 8b 2f 44 89 ee 83 e6 01 31 ff e8 20 6d 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 cb 68 0b 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 07 01 00 00 00 74 1e e8 b0 68 0b RSP: 0018:ffffc90004def160 EFLAGS: 00000293 RAX: ffffffff81b45620 RBX: ffff8880b893ad40 RCX: ffff888029e1da00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90004def2c0 R08: ffffffff8f7ed277 R09: 1ffffffff1efda4e R10: dffffc0000000000 R11: fffffbfff1efda4f R12: 1ffff11017108245 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b8841228 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1052 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1275 [inline] flush_tlb_mm_range+0x6ae/0x12b0 arch/x86/mm/tlb.c:1365 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:480 [inline] zap_pte_range mm/memory.c:1758 [inline] zap_pmd_range mm/memory.c:1823 [inline] zap_pud_range mm/memory.c:1852 [inline] zap_p4d_range mm/memory.c:1873 [inline] unmap_page_range+0x35d6/0x4210 mm/memory.c:1894 unmap_vmas+0x25d/0x3c0 mm/memory.c:1984 exit_mmap+0x245/0xba0 mm/mmap.c:1284 __mmput+0x118/0x420 kernel/fork.c:1379 exit_mm+0x1da/0x2c0 kernel/exit.c:589 do_exit+0x859/0x2550 kernel/exit.c:940 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102 get_signal+0x125e/0x1310 kernel/signal.c:3034 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3018b8e969 Code: Unable to access opcode bytes at 0x7f3018b8e93f. RSP: 002b:00007f30169d50e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f3018db6088 RCX: 00007f3018b8e969 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f3018db6088 RBP: 00007f3018db6080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3018db608c R13: 0000000000000000 R14: 00007ffc2b92a4f0 R15: 00007ffc2b92a5d8