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watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.2.15379:20712] Modules linked in: CPU: 1 PID: 20712 Comm: syz.2.15379 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:434 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x584/0xb70 kernel/locking/qspinlock.c:508 Code: 00 00 41 c6 06 00 48 8b 44 24 10 42 0f b6 04 38 84 c0 0f 85 c4 01 00 00 48 8b 44 24 08 c6 00 01 41 be 00 80 ff ff eb 07 f3 90 <41> ff c6 74 4b 43 0f b6 44 3d 00 84 c0 75 2e 80 3b 00 75 ea 48 89 RSP: 0018:ffffc90000b775e0 EFLAGS: 00000206 RAX: 0000000000000004 RBX: ffffffff86ed8780 RCX: 0000000086ed8700 RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffffff86ed8780 RBP: ffffc90000b776d0 R08: 0000000000000000 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff0ddb0f0 R12: ffff88823ff92680 R13: 1ffffffff0ddb0f0 R14: 00000000fffff70a R15: dffffc0000000000 FS: 00007f5a1f02d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5a2061e600 CR3: 0000000121881000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000200000000300 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [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:184 [inline] __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0xe4/0xf0 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:355 [inline] __register_sysctl_table+0x7e7/0x1250 fs/proc/proc_sysctl.c:1333 register_net_sysctl+0x2c/0x40 net/sysctl_net.c:121 netfilter_log_sysctl_init net/netfilter/nf_log.c:501 [inline] nf_log_net_init+0x4ca/0x590 net/netfilter/nf_log.c:550 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:144 setup_net+0x376/0xb60 net/core/net_namespace.c:345 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:179 copy_process+0x11d3/0x3300 kernel/fork.c:2271 kernel_clone+0x233/0x960 kernel/fork.c:2650 __do_sys_clone kernel/fork.c:2776 [inline] __se_sys_clone kernel/fork.c:2760 [inline] __x64_sys_clone+0x198/0x210 kernel/fork.c:2760 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f5a205d0eb9 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:00007f5a1f02cfd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f5a2084bfa0 RCX: 00007f5a205d0eb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000630c1000 RBP: 00007f5a2063ec1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f5a2084c038 R14: 00007f5a2084bfa0 R15: 00007ffeaa43b708 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 20627 Comm: syz.6.15353 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:25 [inline] RIP: 0010:static_key_false include/linux/jump_label.h:221 [inline] RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:162 [inline] RIP: 0010:wrmsr arch/x86/include/asm/msr.h:273 [inline] RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:208 Code: 74 05 83 ff 30 75 12 5d c3 81 ff d0 00 00 00 74 f6 81 ff e0 00 00 00 74 ee c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <e9> 02 00 00 00 eb d6 89 f6 31 d2 e8 07 51 2b 01 5d c3 0f 1f 44 00 RSP: 0018:ffffc90000007208 EFLAGS: 00000046 RAX: 00000000000000d4 RBX: 00000000000000d4 RCX: 0000000000000838 RDX: 0000000000000000 RSI: 00000000000000d4 RDI: 0000000000000838 RBP: ffffc90000007208 R08: ffff88811f874f00 R09: 0000000000000002 R10: 0000000000000003 R11: 0000000000010101 R12: ffff8881f7026ea8 R13: ffff8881f7026e88 R14: ffffffff85bf6998 R15: dffffc0000000000 FS: 00007f8bbcd376c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 000000010bd77000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: <IRQ> apic_write arch/x86/include/asm/apic.h:396 [inline] lapic_next_event+0x5f/0x70 arch/x86/kernel/apic/apic.c:466 clockevents_program_event+0x1fa/0x8b0 kernel/time/clockevents.c:334 tick_program_event+0xa3/0x120 kernel/time/tick-oneshot.c:44 hrtimer_interrupt+0x3f9/0xdc0 kernel/time/hrtimer.c:1726 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline] __sysvec_apic_timer_interrupt+0xfa/0x3f0 arch/x86/kernel/apic/apic.c:1112 run_sysvec_on_irqstack_cond arch/x86/include/asm/irq_stack.h:91 [inline] sysvec_apic_timer_interrupt+0xba/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:update_stack_state+0x3d7/0x480 arch/x86/kernel/unwind_frame.c:252 Code: 8b 05 ad 36 d3 7e 49 39 45 00 74 0e 48 8b 7d d0 e8 2e fc ff ff 49 89 c6 eb 1d 4c 8b 75 d0 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 f7 e8 6f fc 6f 00 4d 8b 36 48 83 c3 48 48 89 d8 48 c1 RSP: 0018:ffffc90000007538 EFLAGS: 00000246 RAX: 1ffff92000000fc7 RBX: ffffc90000007688 RCX: ffffc90000007e01 RDX: ffffc90000007e30 RSI: 1ffff92000000ed2 RDI: ffffc900000076e0 RBP: ffffc900000075f8 R08: ffffc90000007750 R09: ffffc90000007748 R10: 000000000000000c R11: fffff52000000edd R12: dffffc0000000000 R13: ffffc900000076b0 R14: ffffc90000007e38 R15: 1ffff92000000ed9 unwind_next_frame+0x3d5/0x700 arch/x86/kernel/unwind_frame.c:316 arch_stack_walk+0x108/0x140 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1600 [inline] slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626 slab_free mm/slub.c:3208 [inline] kmem_cache_free+0x100/0x2d0 mm/slub.c:3224 kfree_skbmem+0x10c/0x180 net/core/skbuff.c:-1 __kfree_skb net/core/skbuff.c:695 [inline] kfree_skb+0xc1/0x2f0 net/core/skbuff.c:713 ip6_mc_input+0x235/0x2a0 net/ipv6/ip6_input.c:574 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x18c/0x360 net/ipv6/ip6_input.c:80 NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0xf0/0x230 net/ipv6/ip6_input.c:301 __netif_receive_skb_one_core net/core/dev.c:5402 [inline] __netif_receive_skb+0xc8/0x280 net/core/dev.c:5516 process_backlog+0x368/0x600 net/core/dev.c:6423 napi_poll net/core/dev.c:6874 [inline] net_rx_action+0x44d/0xe00 net/core/dev.c:6944 __do_softirq+0x255/0x563 kernel/softirq.c:309 asm_call_irq_on_stack+0xf/0x20 </IRQ> __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x60/0x80 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:405 [inline] __irq_exit_rcu+0x128/0x150 kernel/softirq.c:435 irq_exit_rcu+0x9/0x10 kernel/softirq.c:447 sysvec_apic_timer_interrupt+0xbf/0xe0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:erase_header fs/proc/proc_sysctl.c:214 [inline] RIP: 0010:start_unregistering fs/proc/proc_sysctl.c:306 [inline] RIP: 0010:drop_sysctl_table+0x241/0x430 fs/proc/proc_sysctl.c:1680 Code: 01 00 48 8b 5c 24 38 74 08 48 89 df e8 d8 c7 d8 ff 49 d1 fc 4d 01 e6 48 8b 33 48 83 c6 50 4c 89 f7 e8 a3 d7 94 00 49 83 c7 40 <4c> 89 f8 48 c1 e8 03 49 bc 00 00 00 00 00 fc ff df 42 80 3c 20 00 RSP: 0018:ffffc90001437460 EFLAGS: 00000282 RAX: 1ffff11028f15e6a RBX: ffff8881478af038 RCX: dffffc0000000000 RDX: ffffc9000a435000 RSI: ffff88811da41a50 RDI: ffff8881478af338 RBP: ffffc90001437558 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000286e7c R12: 00000000000002e0 R13: ffff88814c526608 R14: ffff8881478af330 R15: ffff88814c526608 unregister_sysctl_table+0x75/0x120 fs/proc/proc_sysctl.c:1722 unregister_net_sysctl_table+0x15/0x20 net/sysctl_net.c:127 __devinet_sysctl_unregister net/ipv4/devinet.c:2621 [inline] devinet_sysctl_unregister net/ipv4/devinet.c:2649 [inline] inetdev_destroy net/ipv4/devinet.c:326 [inline] inetdev_event+0x7b1/0x1040 net/ipv4/devinet.c:1612 notifier_call_chain kernel/notifier.c:83 [inline] raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410 call_netdevice_notifiers_info net/core/dev.c:2054 [inline] call_netdevice_notifiers_extack net/core/dev.c:2066 [inline] call_netdevice_notifiers net/core/dev.c:2080 [inline] unregister_netdevice_many+0x1074/0x1a80 net/core/dev.c:10767 sit_exit_batch_net+0x60f/0x660 net/ipv6/sit.c:1943 ops_exit_list net/core/net_namespace.c:190 [inline] setup_net+0x799/0xb60 net/core/net_namespace.c:368 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110 copy_namespaces+0x1d1/0x220 kernel/nsproxy.c:179 copy_process+0x11d3/0x3300 kernel/fork.c:2271 kernel_clone+0x233/0x960 kernel/fork.c:2650 __do_sys_clone kernel/fork.c:2776 [inline] __se_sys_clone kernel/fork.c:2760 [inline] __x64_sys_clone+0x198/0x210 kernel/fork.c:2760 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f8bbe2daeb9 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:00007f8bbcd36fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f8bbe555fa0 RCX: 00007f8bbe2daeb9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000 RBP: 00007f8bbe348c1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000 R13: 00007f8bbe556038 R14: 00007f8bbe555fa0 R15: 00007ffdc3c59248
| Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026/02/01 19:30 | android13-5.10-lts | 186f761c519d | 6b8752f2 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci2-android-5-10-perf | BUG: soft lockup in sys_clone |