watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz.9.3078:11647]
Modules linked in:
CPU: 1 PID: 11647 Comm: syz.9.3078 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:206
Code: 90 ae 99 7e 65 8b 15 91 ae 99 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
RSP: 0018:ffffc90000ea7210 EFLAGS: 00000246
RAX: ffffffff815e8b35 RBX: ffff8881f7138e80 RCX: ffff88810ae8bb40
RDX: 0000000000000002 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90000ea7210 R08: dffffc0000000000 R09: ffffc90000ea7160
R10: fffff520001d4e2e R11: 1ffff920001d4e2c R12: 1ffff1103ee271d0
R13: 1ffff1103ee07af9 R14: 0000000000000000 R15: ffff8881f703d7c8
FS:  00007fcbfc7756c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe68d157f98 CR3: 000000012b716000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 csd_lock_wait kernel/smp.c:440 [inline]
 smp_call_function_many_cond+0x8e5/0x9f0 kernel/smp.c:969
 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+0x1ad/0x1840 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+0x311/0xc10 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:899 [inline]
 bpf_int_jit_compile+0xc493/0xcc60 arch/x86/net/bpf_jit_comp.c:2478
 bpf_prog_select_runtime+0x6f1/0x9f0 kernel/bpf/core.c:1934
 bpf_prog_load+0x106d/0x1550 kernel/bpf/syscall.c:2332
 __sys_bpf+0x4c3/0x730 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: 0033:0x7fcbfdd0d749
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:00007fcbfc775038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fcbfdf63fa0 RCX: 00007fcbfdd0d749
RDX: 0000000000000090 RSI: 0000200000000840 RDI: 0000000000000005
RBP: 00007fcbfdd91f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcbfdf64038 R14: 00007fcbfdf63fa0 R15: 00007fffc29d6288
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11652 Comm: syz.1.3079 Tainted: G        W         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:912
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 45 92 d6 03 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:ffffc90000a26b00 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff88811bf21cac RCX: ffffffff814f4289
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88811bf21cac
RBP: ffffc90000a26b90 R08: dffffc0000000000 R09: ffffed10237e4396
R10: ffffed10237e4396 R11: 1ffff110237e4395 R12: 1ffff1103ee00001
R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff92000144d60
FS:  00007fb8014596c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000011adde000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 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+0xd9/0xe0 kernel/locking/spinlock.c:170
 get_wchan kernel/sched/core.c:2021 [inline]
 perf_trace_sched_blocked_reason+0x243/0x4a0 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 kernel/sched/core.c:4348 [inline]
 wake_up_q+0xdf/0x1c0 kernel/sched/core.c:975
 __mutex_unlock_slowpath+0x262/0x3b0 kernel/locking/mutex.c:923
 mutex_unlock+0xd8/0x220 kernel/locking/mutex.c:557
 pcpu_alloc+0xf26/0x1660 mm/percpu.c:1875
 __alloc_percpu_gfp+0x25/0x30 mm/percpu.c:1937
 fib_nh_common_init+0x3b/0x150 net/ipv4/fib_semantics.c:589
 fib6_nh_init+0x14e2/0x1ef0 net/ipv6/route.c:3628
 ip6_route_info_create+0xa66/0x1510 net/ipv6/route.c:3836
 ip6_route_add+0x27/0x130 net/ipv6/route.c:3880
 addrconf_add_mroute net/ipv6/addrconf.c:2532 [inline]
 addrconf_add_dev+0x329/0x430 net/ipv6/addrconf.c:2550
 addrconf_dev_config net/ipv6/addrconf.c:3429 [inline]
 addrconf_init_auto_addrs+0x765/0xb90 net/ipv6/addrconf.c:3517
 addrconf_notify+0x95d/0xde0 net/ipv6/addrconf.c:3686
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:391
 call_netdevice_notifiers_info net/core/dev.c:2057 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2069 [inline]
 call_netdevice_notifiers net/core/dev.c:2083 [inline]
 __dev_notify_flags+0x28f/0x500 net/core/dev.c:-1
 dev_change_flags+0xe8/0x1a0 net/core/dev.c:8937
 dev_ifsioc+0x147/0xe70 net/core/dev_ioctl.c:324
 dev_ioctl+0x560/0xd10 net/core/dev_ioctl.c:587
 sock_do_ioctl+0x22e/0x300 net/socket.c:1154
 sock_ioctl+0x4bc/0x6b0 net/socket.c:1257
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 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: 0033:0x7fb8029f1749
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:00007fb801459038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb802c47fa0 RCX: 00007fb8029f1749
RDX: 0000200000000100 RSI: 0000000000008914 RDI: 0000000000000012
RBP: 00007fb802a75f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb802c48038 R14: 00007fb802c47fa0 R15: 00007ffd303e4ee8
 </TASK>