watchdog: BUG: soft lockup - CPU#1 stuck for 226s! [syz.0.8361:25621] Modules linked in: CPU: 1 PID: 25621 Comm: syz.0.8361 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:rep_nop arch/x86/include/asm/vdso/processor.h:13 [inline] RIP: 0010:cpu_relax arch/x86/include/asm/vdso/processor.h:18 [inline] RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline] RIP: 0010:smp_call_function_many_cond+0x870/0x960 kernel/smp.c:998 Code: 75 78 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 90 41 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a RSP: 0018:ffffc90001d87200 EFLAGS: 00000246 RAX: ffffffff8166a78e RBX: dffffc0000000000 RCX: 0000000000080000 RDX: ffffc9000537a000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc90001d87338 R08: dffffc0000000000 R09: ffffed103ee2721b R10: 0000000000000000 R11: ffffffff81342170 R12: 1ffff1103ee27218 R13: 1ffff1103ee07ae1 R14: 0000000000000000 R15: ffff8881f703d708 FS: 00007f11aa4cc6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000bf6000 CR3: 000000012cf68000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1166 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:1574 [inline] text_poke_bp_batch+0x1cc/0x580 arch/x86/kernel/alternative.c:1774 text_poke_bp+0xc8/0x140 arch/x86/kernel/alternative.c:2011 __static_call_transform+0x318/0x500 arch/x86/kernel/static_call.c:109 arch_static_call_transform+0xd3/0x280 arch/x86/kernel/static_call.c:161 __static_call_update+0xef/0x5c0 kernel/static_call_inline.c:136 bpf_dispatcher_update kernel/bpf/dispatcher.c:126 [inline] bpf_dispatcher_change_prog+0xc11/0xd80 kernel/bpf/dispatcher.c:170 bpf_prog_change_xdp+0x24/0x30 net/core/filter.c:11570 dev_xdp_install+0x1fc/0x250 net/core/dev.c:9220 dev_xdp_attach+0xb83/0xde0 net/core/dev.c:9360 dev_xdp_attach_link net/core/dev.c:9379 [inline] bpf_xdp_link_attach+0x266/0x460 net/core/dev.c:9548 link_create+0x746/0xd30 kernel/bpf/syscall.c:4637 __sys_bpf+0x5fc/0x780 kernel/bpf/syscall.c:5072 __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: 0033:0x7f11a958eba9 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:00007f11aa4cc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f11a97d6090 RCX: 00007f11a958eba9 RDX: 0000000000000040 RSI: 0000200000000240 RDI: 000000000000001c RBP: 00007f11a9611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f11a97d6128 R14: 00007f11a97d6090 R15: 00007ffc4f51b3c8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 25627 Comm: syz.0.8361 Not tainted 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 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07 RSP: 0018:ffffc90001e17300 EFLAGS: 00000046 RAX: 0000000000000003 RBX: ffff888116c07140 RCX: ffffffff84f3bd32 RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff888116c07140 RBP: ffffc90001e17390 R08: dffffc0000000000 R09: ffffed1022d80e29 R10: ffffed1022d80e29 R11: 1ffff11022d80e28 R12: 1ffff1103ee00001 R13: ffff8881f7038cf4 R14: dffffc0000000000 R15: 1ffff920003c2e60 FS: 00007f11aa48a6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11aa4aaf98 CR3: 000000012cf68000 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 __queue_map_get+0xe4/0x3d0 kernel/bpf/queue_stack_maps.c:109 queue_map_peek_elem+0x1f/0x30 kernel/bpf/queue_stack_maps.c:171 bpf_prog_00798911c748094f+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 __traceiter_contention_end+0x8c/0xc0 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 __queue_map_get+0xe4/0x3d0 kernel/bpf/queue_stack_maps.c:109 queue_map_peek_elem+0x1f/0x30 kernel/bpf/queue_stack_maps.c:171 bpf_prog_00798911c748094f+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_prog_run_pin_on_cpu include/linux/filter.h:627 [inline] bpf_flow_dissect+0x124/0x3e0 net/core/flow_dissector.c:922 bpf_prog_test_run_flow_dissector+0x409/0x600 net/bpf/test_run.c:1484 bpf_prog_test_run+0x3e3/0x630 kernel/bpf/syscall.c:3665 __sys_bpf+0x56d/0x780 kernel/bpf/syscall.c:5020 __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: 0033:0x7f11a958eba9 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:00007f11aa48a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f11a97d6270 RCX: 00007f11a958eba9 RDX: 0000000000000050 RSI: 0000200000000180 RDI: 000000000000000a RBP: 00007f11a9611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f11a97d6308 R14: 00007f11a97d6270 R15: 00007ffc4f51b3c8