syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [kworker/1:4:870]
Modules linked in:
CPU: 1 PID: 870 Comm: kworker/1:4 Not tainted 6.1.141-syzkaller-00038-ge2deb0b42a3a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events pcpu_balance_workfn
RIP: 0010:__sanitizer_cov_trace_pc+0x1/0x60 kernel/kcov.c:209
Code: fb e8 23 00 00 00 48 8b 3d 4c 2a 02 06 48 89 de e8 d4 9f 43 00 5b 5d c3 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 <48> 89 e5 48 8b 45 08 65 48 8b 0d 40 76 92 7e 65 8b 15 41 76 92 7e
RSP: 0018:ffffc9000e53fad0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888133748000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e53fc18 R08: dffffc0000000000 R09: ffffc9000e53fa20
R10: fffff52001ca7f46 R11: 1ffff92001ca7f44 R12: 1ffff1103ee27210
R13: 1ffff1103ee07ab9 R14: 0000000000000000 R15: ffff8881f703d5c8
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200001000000 CR3: 000000013adbf000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 flush_tlb_kernel_range+0x43/0x240 arch/x86/mm/tlb.c:1098
 pcpu_post_unmap_tlb_flush mm/percpu-vm.c:188 [inline]
 pcpu_reclaim_populated mm/percpu.c:2209 [inline]
 pcpu_balance_workfn+0x529/0x1010 mm/percpu.c:2245
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2299
 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2446
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3691 Comm: syz.2.1506 Not tainted 6.1.141-syzkaller-00038-ge2deb0b42a3a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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 b5 ae 13 04 f4 <eb> 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07
RSP: 0018:ffffc9001091f4c0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8881f7027c40 RCX: ffffffff84f06582
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881f7027c40
RBP: ffffc9001091f550 R08: dffffc0000000000 R09: ffffed103ee04f89
R10: ffffed103ee04f89 R11: 1ffff1103ee04f88 R12: 1ffff1103ee00001
R13: ffff8881f7038c94 R14: dffffc0000000000 R15: 1ffff92002123e98
FS:  00007efce681c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 00000001203cb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 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
 lock_timer_base+0x127/0x270 kernel/time/timer.c:1005
 __mod_timer+0x10a/0xb30 kernel/time/timer.c:1078
 add_timer+0x68/0x80 kernel/time/timer.c:1218
 __queue_delayed_work+0x173/0x200 kernel/workqueue.c:1686
 queue_delayed_work_on+0xdb/0x150 kernel/workqueue.c:1711
 queue_delayed_work include/linux/workqueue.h:525 [inline]
 schedule_delayed_monitor_work kernel/rcu/tree.c:3216 [inline]
 kvfree_call_rcu+0x436/0x7a0 kernel/rcu/tree.c:3472
 trie_delete_elem+0x572/0x720 kernel/bpf/lpm_trie.c:545
 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_run3+0x113/0x270 kernel/trace/bpf_trace.c:2323
 __bpf_trace_timer_start+0x2b/0x40 include/trace/events/timer.h:53
 __traceiter_timer_start+0x8c/0xe0 include/trace/events/timer.h:53
 trace_timer_start include/trace/events/timer.h:53 [inline]
 enqueue_timer+0x337/0x480 kernel/time/timer.c:615
 __mod_timer+0x79f/0xb30 kernel/time/timer.c:-1
 mod_timer+0x1f/0x30 kernel/time/timer.c:1172
 sk_reset_timer+0x22/0xb0 net/core/sock.c:3390
 tipc_sk_finish_conn+0x14e/0x7e0 net/tipc/socket.c:1675
 tipc_socketpair+0x2a4/0x520 net/tipc/socket.c:3350
 __sys_socketpair+0x2b5/0x5b0 net/socket.c:1740
 __do_sys_socketpair net/socket.c:1776 [inline]
 __se_sys_socketpair net/socket.c:1773 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1773
 x64_sys_call+0x6e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:54
 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: 0033:0x7efce598e929
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:00007efce681c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007efce5bb5fa0 RCX: 00007efce598e929
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 000000000000001e
RBP: 00007efce5a10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000940 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007efce5bb5fa0 R15: 00007ffe7f2eb358
 </TASK>