watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [syz.8.2894:10683]
Modules linked in:
CPU: 0 PID: 10683 Comm: syz.8.2894 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline]
RIP: 0010:smp_call_function_many_cond+0x872/0x960 kernel/smp.c:998
Code: 41 8b 1f 89 de 83 e6 01 31 ff e8 29 66 09 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 f5 61 09 00 e9 38 ff ff ff f3 90 <41> 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a ff ff
RSP: 0000:ffffc90000e277e0 EFLAGS: 00000293
RAX: ffffffff8166a78e RBX: dffffc0000000000 RCX: ffff88811e5b3cc0
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000e27920 R08: 0000000000000004 R09: 0000000000000003
R10: 0000000000000000 R11: 1ffff920001c4ea0 R12: 1ffff1103ee07218
R13: 1ffff1103ee278a5 R14: 0000000000000001 R15: ffff8881f713c528
FS:  00005555838fb500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2c5ed0d680 CR3: 0000000112a3b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1166
 native_flush_tlb_multi+0x144/0x210 arch/x86/mm/tlb.c:-1
 __flush_tlb_multi arch/x86/include/asm/paravirt.h:87 [inline]
 flush_tlb_multi arch/x86/mm/tlb.c:970 [inline]
 flush_tlb_mm_range+0x36a/0x470 arch/x86/mm/tlb.c:1058
 flush_tlb_page arch/x86/include/asm/tlbflush.h:241 [inline]
 ptep_clear_flush+0x111/0x150 mm/pgtable-generic.c:99
 wp_page_copy+0xca3/0x15b0 mm/memory.c:3278
 do_wp_page+0x9f2/0xfc0 mm/memory.c:-1
 handle_pte_fault mm/memory.c:5189 [inline]
 __handle_mm_fault mm/memory.c:5313 [inline]
 handle_mm_fault+0x10e4/0x2640 mm/memory.c:5453
 do_user_addr_fault+0x905/0x1050 arch/x86/mm/fault.c:1323
 handle_page_fault arch/x86/mm/fault.c:1466 [inline]
 exc_page_fault+0x51/0xb0 arch/x86/mm/fault.c:1522
 asm_exc_page_fault+0x27/0x30 arch/x86/include/asm/idtentry.h:608
RIP: 0033:0x7f2c5df45e4e
Code: 31 ff 4d 01 f2 41 0f 92 c7 72 a6 48 8b 44 24 08 48 8d 84 06 00 08 00 00 4c 01 f0 48 21 d8 49 39 c2 72 8e 31 c0 be 01 00 00 00 <f0> 0f b1 35 2a 78 dc 00 0f 85 26 0a 00 00 c1 e1 02 48 8b 05 3a 78
RSP: 002b:00007ffda7f425a0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: fffffffffffff000 RCX: 0000000000000006
RDX: 000000000000003f RSI: 0000000000000001 RDI: 00007ffda7f426e8
RBP: 0000000000000000 R08: 0000000000000001 R09: 00007f2c5e1d5fb0
R10: 0000000000021000 R11: 0000000000020000 R12: 00007ffda7f426f0
R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10684 Comm: syz.8.2894 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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 d5 ab 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:ffffc900001b0740 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff888125bcf960 RCX: ffffffff84f3dd82
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888125bcf960
RBP: ffffc900001b07d0 R08: dffffc0000000000 R09: ffffed1024b79f2d
R10: ffffed1024b79f2d R11: 1ffff11024b79f2c R12: 1ffff1103ee20001
R13: ffff8881f7138cf4 R14: dffffc0000000000 R15: 1ffff920000360e8
FS:  00007f2c5ee186c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000112a3b000 CR4: 00000000003506a0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 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
 trie_delete_elem+0x95/0x720 kernel/bpf/lpm_trie.c:467
 bpf_prog_5186c38a4019a4cb+0x42/0x46
 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
 trie_delete_elem+0x95/0x720 kernel/bpf/lpm_trie.c:467
 bpf_prog_5186c38a4019a4cb+0x42/0x46
 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_tlb_flush+0x25/0x30 include/trace/events/tlb.h:38
 __traceiter_tlb_flush+0x84/0xd0 include/trace/events/tlb.h:38
 trace_tlb_flush include/trace/events/tlb.h:38 [inline]
 flush_tlb_func+0x4ca/0x4f0 arch/x86/mm/tlb.c:879
 __flush_smp_call_function_queue+0x22e/0x6e0 kernel/smp.c:641
 generic_smp_call_function_single_interrupt+0x13/0x20 kernel/smp.c:557
 __sysvec_call_function_single+0x75/0x1c0 arch/x86/kernel/smp.c:267
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:262 [inline]
 sysvec_call_function_single+0xa1/0xc0 arch/x86/kernel/smp.c:262
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1b/0x20 arch/x86/include/asm/idtentry.h:699
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x30/0x60 kernel/kcov.c:216
Code: 45 08 65 48 8b 0d 50 64 92 7e 65 8b 15 51 64 92 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 6c 0b 00 00 00 74 2c <8b> 91 48 0b 00 00 83 fa 02 75 21 48 8b 91 50 0b 00 00 48 8b 32 48
RSP: 0018:ffffc90001716f30 EFLAGS: 00000246
RAX: ffffffff8187e081 RBX: 0000000000000000 RCX: ffff88813ea39440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001716f30 R08: ffff88813ea39440 R09: 000000000000000b
R10: 000000000000000c R11: 0000000000000002 R12: dffffc0000000000
R13: ffff88811e442438 R14: ffff888147717438 R15: ffffffff00000000
 __mark_reg64_unbounded kernel/bpf/verifier.c:1405 [inline]
 __reg_combine_32_into_64 kernel/bpf/verifier.c:1596 [inline]
 reg_set_min_max+0xda1/0x1fc0 kernel/bpf/verifier.c:10130
 check_cond_jmp_op kernel/bpf/verifier.c:10535 [inline]
 do_check+0x975e/0xf060 kernel/bpf/verifier.c:12726
 do_check_common+0x11ae/0x1950 kernel/bpf/verifier.c:14930
 do_check_main kernel/bpf/verifier.c:14993 [inline]
 bpf_check+0x3de0/0x10ca0 kernel/bpf/verifier.c:15570
 bpf_prog_load+0x1071/0x15a0 kernel/bpf/syscall.c:2621
 __sys_bpf+0x504/0x780 kernel/bpf/syscall.c:5002
 __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: 0033:0x7f2c5df8ec29
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:00007f2c5ee18038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f2c5e1d5fa0 RCX: 00007f2c5df8ec29
RDX: 0000000000000094 RSI: 0000200000002c40 RDI: 0000000000000005
RBP: 00007f2c5e011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c5e1d6038 R14: 00007f2c5e1d5fa0 R15: 00007ffda7f425f8
 </TASK>