watchdog: BUG: soft lockup - CPU#1 stuck for 144s! [syz.0.39:473]
Modules linked in:
CPU: 1 PID: 473 Comm: syz.0.39 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x8e3/0xa10 kernel/smp.c:969
Code: 84 c0 0f 85 9d 00 00 00 41 8b 1f 89 de 83 e6 01 31 ff e8 e0 4e 0a 00 83 e3 01 48 8b 5c 24 10 75 07 e8 21 4b 0a 00 eb 42 f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 75 10 41 f7
RSP: 0018:ffffc90000b77220 EFLAGS: 00000246
RAX: ffffffff815f81f5 RBX: ffff8881f7138e80 RCX: 0000000000080000
RDX: ffffc9000135b000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90000b77328 R08: ffffc90000b7716f R09: ffffc90000b77160
R10: dffffc0000000000 R11: fffff5200016ee2e R12: 1ffff1103ee271d0
R13: 1ffff1103ee07af9 R14: 0000000000000000 R15: ffff8881f703d7c8
FS:  00007fb1758e66c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f234b448dac CR3: 000000012b79e000 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:1134
 on_each_cpu include/linux/smp.h:71 [inline]
 flush_tlb_kernel_range+0x43/0x240 arch/x86/mm/tlb.c:1074
 __purge_vmap_area_lazy+0x1b5/0x18a0 mm/vmalloc.c:1702
 _vm_unmap_aliases+0x2fd/0x380 mm/vmalloc.c:2126
 vm_unmap_aliases+0x19/0x20 mm/vmalloc.c:2149
 change_page_attr_set_clr+0x323/0xca0 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+0xc6c3/0xcd60 arch/x86/net/bpf_jit_comp.c:2478
 bpf_prog_select_runtime+0x6f1/0x9f0 kernel/bpf/core.c:1947
 bpf_prog_load+0x10f3/0x1640 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: 0033:0x7fb176e8af79
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:00007fb1758e6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fb177104fa0 RCX: 00007fb176e8af79
RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005
RBP: 00007fb176f217e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb177105038 R14: 00007fb177104fa0 R15: 00007fff34bdbe48
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 484 Comm: syz.2.44 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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+0xdf/0x150 arch/x86/kernel/kvm.c:912
Code: 43 c6 44 37 04 f8 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 93 66 90 0f 00 2d 92 1d 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
RSP: 0018:ffffc90000007940 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8881002febac RCX: ffffffff815008c9
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881002febac
RBP: ffffc900000079d0 R08: ffff8881002febac R09: 1ffff1102005fd75
R10: dffffc0000000000 R11: ffffed102005fd76 R12: 1ffff1103ee00001
R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff92000000f28
FS:  00007f86e4a906c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000012cfa8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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+0x60f/0x9c0 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_irq include/linux/spinlock_api_smp.h:129 [inline]
 _raw_spin_lock_irq+0xe5/0xf0 kernel/locking/spinlock.c:170
 get_wchan kernel/sched/core.c:2021 [inline]
 perf_trace_sched_blocked_reason+0x24f/0x4b0 include/trace/events/sched.h:490
 trace_sched_blocked_reason include/trace/events/sched.h:490 [inline]
 try_to_wake_up+0xea1/0x1160 kernel/sched/core.c:4190
 wake_up_process+0x10/0x20 kernel/sched/core.c:4348
 swake_up_locked kernel/sched/swait.c:30 [inline]
 swake_up_one+0x6a/0x150 kernel/sched/swait.c:53
 rcu_gp_kthread_wake kernel/rcu/tree.c:1481 [inline]
 note_gp_changes+0x1c6/0x230 kernel/rcu/tree.c:1691
 rcu_check_quiescent_state kernel/rcu/tree.c:2346 [inline]
 rcu_core+0x25c/0xf80 kernel/rcu/tree.c:2747
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:__sanitizer_cov_trace_pc+0x3b/0x60 kernel/kcov.c:209
Code: 8b 15 81 a0 98 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 5c 0b 00 00 00 74 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
RSP: 0018:ffffc90001027db8 EFLAGS: 00000246
RAX: ffffffff81b71dd0 RBX: ffff88811c3ff000 RCX: ffff888112d213c0
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 00000000ffffffff
RBP: ffffc90001027db8 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000204fa8 R12: ffff888111a0d880
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8881001c7368
 get_next_ino+0x10/0x190 fs/inode.c:976
 sock_alloc net/socket.c:632 [inline]
 __sock_create+0x145/0x7a0 net/socket.c:1449
 sock_create net/socket.c:1541 [inline]
 __sys_socketpair+0x218/0x590 net/socket.c:1645
 __do_sys_socketpair net/socket.c:1694 [inline]
 __se_sys_socketpair net/socket.c:1691 [inline]
 __x64_sys_socketpair+0x9b/0xb0 net/socket.c:1691
 x64_sys_call+0x36/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:54
 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: 0033:0x7f86e6034f79
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:00007f86e4a90028 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 00007f86e62aefa0 RCX: 00007f86e6034f79
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 00007f86e60cb7e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f86e62af038 R14: 00007f86e62aefa0 R15: 00007ffe15144ed8
 </TASK>