watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz.9.1890:7016] Modules linked in: CPU: 1 PID: 7016 Comm: syz.9.1890 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline] RIP: 0010:smp_call_function_single+0x1f5/0x470 kernel/smp.c:787 Code: 48 44 89 f6 83 e6 01 31 ff e8 37 77 09 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 02 73 09 00 e9 a9 00 00 00 f3 90 44 24 48 01 00 00 00 0f 84 94 00 00 00 e8 e8 72 09 00 eb e9 e8 RSP: 0018:ffffc90004347ae0 EFLAGS: 00000246 RAX: ffffffff8166b6d8 RBX: 0000000000000000 RCX: 0000000000080000 RDX: ffffc90009aaa000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc90004347bd0 R08: dffffc0000000000 R09: fffff52000868f35 R10: fffff52000868f35 R11: 1ffff92000868f34 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff92000868f60 FS: 00007f90fce186c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000100 CR3: 00000001313fe000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: cpu_function_call kernel/events/core.c:153 [inline] perf_install_in_context+0x412/0x730 kernel/events/core.c:2893 __do_sys_perf_event_open kernel/events/core.c:12735 [inline] __se_sys_perf_event_open+0x1281/0x1b80 kernel/events/core.c:12329 __x64_sys_perf_event_open+0xbf/0xd0 kernel/events/core.c:12329 x64_sys_call+0x385/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:299 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f90fbf8f749 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:00007f90fce18038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f90fc1e6090 RCX: 00007f90fbf8f749 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000000c0 RBP: 00007f90fc013f91 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f90fc1e6128 R14: 00007f90fc1e6090 R15: 00007fff7aed7b98 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 7003 Comm: syz.0.1888 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline] RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline] RIP: 0010:kvm_wait+0xcc/0x140 arch/x86/kernel/kvm.c:1058 Code: 20 f6 44 24 21 02 75 24 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 48 0f b6 07 40 38 f0 75 a6 66 90 0f 00 2d 95 96 13 04 f4 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 RSP: 0018:ffffc900045df280 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffffe8ffff803cac RCX: ffffffff84f48de2 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffffe8ffff803cac RBP: ffffc900045df310 R08: dffffc0000000000 R09: fffff91ffff00796 R10: fffff91ffff00796 R11: 1ffffd1ffff00795 R12: 1ffff1103ee00001 R13: ffff8881f7038cf4 R14: dffffc0000000000 R15: 1ffff920008bbe50 FS: 00007fc3eea906c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000269000 CR3: 0000000131e8d000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_wait arch/x86/include/asm/paravirt.h:603 [inline] pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline] __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x108/0x110 kernel/locking/spinlock.c:162 bpf_common_lru_push_free kernel/bpf/bpf_lru_list.c:522 [inline] bpf_lru_push_free+0x36b/0xb70 kernel/bpf/bpf_lru_list.c:561 htab_lru_push_free kernel/bpf/hashtab.c:1175 [inline] htab_lru_map_delete_elem+0x5e4/0x740 kernel/bpf/hashtab.c:1451 bpf_prog_2c29ac5cdc6b1842+0x3a/0x3e bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline] __bpf_prog_run include/linux/filter.h:603 [inline] bpf_prog_run include/linux/filter.h:610 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2283 [inline] bpf_trace_run2+0xff/0x250 kernel/trace/bpf_trace.c:2322 __bpf_trace_contention_end+0xb/0x10 include/trace/events/lock.h:122 trace_contention_end include/trace/events/lock.h:122 [inline] __pv_queued_spin_lock_slowpath+0xbff/0xc40 kernel/locking/qspinlock.c:560 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline] queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x108/0x110 kernel/locking/spinlock.c:162 bpf_common_lru_pop_free kernel/bpf/bpf_lru_list.c:448 [inline] bpf_lru_pop_free+0x1a1/0x1bf0 kernel/bpf/bpf_lru_list.c:504 prealloc_lru_pop kernel/bpf/hashtab.c:296 [inline] __htab_lru_percpu_map_update_elem+0x19a/0x930 kernel/bpf/hashtab.c:1333 bpf_percpu_hash_update+0x78/0xd0 kernel/bpf/hashtab.c:2336 bpf_map_update_value+0x278/0x420 kernel/bpf/syscall.c:202 generic_map_update_batch+0x502/0x780 kernel/bpf/syscall.c:1682 bpf_map_do_batch+0x48c/0x620 kernel/bpf/syscall.c:-1 __sys_bpf+0x624/0x780 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:5106 [inline] __se_sys_bpf kernel/bpf/syscall.c:5104 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5104 x64_sys_call+0x488/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc3edb8f749 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:00007fc3eea90038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc3edde5fa0 RCX: 00007fc3edb8f749 RDX: 0000000000000038 RSI: 0000200000000340 RDI: 000000000000001a RBP: 00007fc3edc13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc3edde6038 R14: 00007fc3edde5fa0 R15: 00007ffc9b4d1c48