watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.3.973:10025] Modules linked in: irq event stamp: 11217547 hardirqs last enabled at (11217546): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (11217547): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (11109254): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (11109254): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (11109254): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (11109257): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (11109257): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (11109257): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 10025 Comm: syz.3.973 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:perf_trace_buf_alloc+0x72/0x2a0 kernel/trace/trace_event_perf.c:411 Code: 00 00 49 bd 00 00 00 00 00 fc ff df e8 f7 0d 26 00 89 c5 4c 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 a7 01 00 00 41 89 2f <31> ff 89 ee e8 95 76 f6 ff 85 ed 0f 88 a9 00 00 00 41 89 ef 4d 85 RSP: 0018:ffffc90000006800 EFLAGS: 00000297 RAX: 0000000000000004 RBX: 000000000000002c RCX: 0000000000006803 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 00000000ffffffff R08: 0000000000000000 R09: ffffffff81cb1657 R10: dffffc0000000000 R11: fffff91ffff9181d R12: 1ffff92000000d10 R13: dffffc0000000000 R14: ffffc900000068a0 R15: ffffc900000068c0 FS: 00007fb556ff66c0(0000) GS:ffff888125c15000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c346ae2 CR3: 0000000075e52000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x18d/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock+0x93/0xa0 include/linux/rcupdate.h:871 trace_call_bpf+0x7dd/0x850 kernel/trace/bpf_trace.c:125 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10918 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] class_rcu_destructor include/linux/rcupdate.h:1155 [inline] unwind_next_frame+0x19a9/0x2390 arch/x86/kernel/unwind_orc.c:680 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:243 [inline] __kasan_slab_free+0x5b/0x80 mm/kasan/common.c:275 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2422 [inline] slab_free mm/slub.c:4695 [inline] kmem_cache_free+0x18f/0x400 mm/slub.c:4797 skb_release_data+0x62d/0x7c0 net/core/skbuff.c:1086 skb_release_all net/core/skbuff.c:1151 [inline] __kfree_skb net/core/skbuff.c:1165 [inline] sk_skb_reason_drop+0x127/0x170 net/core/skbuff.c:1203 kfree_skb_reason include/linux/skbuff.h:1275 [inline] kfree_skb include/linux/skbuff.h:1284 [inline] xfrmi_xmit+0xdad/0x1af0 net/xfrm/xfrm_interface_core.c:581 __netdev_start_xmit include/linux/netdevice.h:5222 [inline] netdev_start_xmit include/linux/netdevice.h:5231 [inline] xmit_one net/core/dev.c:3839 [inline] dev_hard_start_xmit+0x2d4/0x830 net/core/dev.c:3855 __dev_queue_xmit+0x1b8d/0x3b50 net/core/dev.c:4725 neigh_output include/net/neighbour.h:547 [inline] ip6_finish_output2+0x11fb/0x16a0 net/ipv6/ip6_output.c:141 NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xb54/0x1440 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17b/0x5f0 kernel/time/timer.c:1747 expire_timers kernel/time/timer.c:1798 [inline] __run_timers kernel/time/timer.c:2372 [inline] __run_timer_base+0x61a/0x860 kernel/time/timer.c:2384 run_timer_base kernel/time/timer.c:2393 [inline] run_timer_softirq+0xb7/0x180 kernel/time/timer.c:2403 handle_softirqs+0x283/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:migrate_enable+0x2d5/0x3c0 kernel/sched/core.c:2442 Code: ff eb 1e 41 ff cf 49 bc 00 00 00 00 00 fc ff df 42 0f b6 04 23 84 c0 0f 85 ce 00 00 00 66 44 89 3a 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 08 00 00 00 00 65 48 8b 05 RSP: 0018:ffffc9000c2271a0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff8880b863ada0 RCX: 0000000000000000 RDX: ffff8880303f4040 RSI: ffffffff8be33d60 RDI: 00000000ffffffff RBP: ffffc9000c227290 R08: ffffc9000c22732f R09: 0000000000000000 R10: ffffc9000c227320 R11: ffffffffa0201810 R12: dffffc0000000000 R13: 1ffff92001844e3c R14: ffffffff8dbe1d10 R15: ffff8880303f4020 bpf_prog_run_array include/linux/bpf.h:2296 [inline] trace_call_bpf+0x4b9/0x850 kernel/trace/bpf_trace.c:146 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:10918 do_perf_trace_lock include/trace/events/lock.h:50 [inline] perf_trace_lock+0x2f8/0x3b0 include/trace/events/lock.h:50 __do_trace_lock_release include/trace/events/lock.h:69 [inline] trace_lock_release include/trace/events/lock.h:69 [inline] lock_release+0x3b2/0x3e0 kernel/locking/lockdep.c:5879 __fs_reclaim_release mm/page_alloc.c:4239 [inline] fs_reclaim_release mm/page_alloc.c:4265 [inline] might_alloc include/linux/sched/mm.h:319 [inline] prepare_alloc_pages+0x1b5/0x610 mm/page_alloc.c:4916 __alloc_frozen_pages_noprof+0x123/0x370 mm/page_alloc.c:5137 __alloc_pages_noprof mm/page_alloc.c:5182 [inline] alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:5102 alloc_pages_bulk_mempolicy_noprof+0x341/0x1650 mm/mempolicy.c:2724 vm_area_alloc_pages mm/vmalloc.c:3616 [inline] __vmalloc_area_node mm/vmalloc.c:3720 [inline] __vmalloc_node_range_noprof+0x733/0x12f0 mm/vmalloc.c:3893 __vmalloc_node_noprof mm/vmalloc.c:3956 [inline] __vmalloc_noprof+0xb1/0xf0 mm/vmalloc.c:3970 bpf_prog_alloc_no_stats+0x4a/0x4b0 kernel/bpf/core.c:104 bpf_prog_alloc+0x3c/0x1a0 kernel/bpf/core.c:150 bpf_prog_load+0x735/0x1930 kernel/bpf/syscall.c:2889 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6029 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb558d8ec29 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:00007fb556ff6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb558fd5fa0 RCX: 00007fb558d8ec29 RDX: 0000000000000094 RSI: 0000200000000600 RDI: 0000000000000005 RBP: 00007fb558e11e41 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb558fd6038 R14: 00007fb558fd5fa0 R15: 00007ffec7ae9328 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 18 Comm: rcu_exp_gp_kthr Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:irqtime_account_irq+0x23/0x1c0 kernel/sched/cputime.c:-1 Code: 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 41 56 41 55 41 54 53 89 f5 49 89 fe e8 68 00 e3 09 89 c3 83 f8 08 0f 83 85 01 00 00 <49> bc 00 00 00 00 00 fc ff df 4c 8d 3c dd 10 1d be 8d 4c 89 f8 48 RSP: 0018:ffffc90000a08e08 EFLAGS: 00000097 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 83c9d65d80110000 RDX: 0000000000010000 RSI: ffffffff8be33d60 RDI: ffffffff8be33d20 RBP: 0000000000000100 R08: ffffffff8fa3a437 R09: 1ffffffff1f47486 R10: dffffc0000000000 R11: fffffbfff1f47487 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88801ceb1e00 R15: ffff88801ceb1e00 FS: 0000000000000000(0000) GS:ffff888125d15000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f36b7959020 CR3: 0000000075e52000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: account_softirq_enter include/linux/vtime.h:136 [inline] handle_softirqs+0x15e/0x870 kernel/softirq.c:557 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2061 [inline] RIP: 0010:vprintk_emit+0x58f/0x7a0 kernel/printk/printk.c:2449 Code: 85 32 01 00 00 e8 c1 87 1f 00 41 89 df 4d 85 f6 48 8b 1c 24 75 07 e8 b0 87 1f 00 eb 06 e8 a9 87 1f 00 fb 48 c7 c7 80 e3 12 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 b9 35 RSP: 0018:ffffc900001778e0 EFLAGS: 00000293 RAX: ffffffff81a03757 RBX: ffffffff81a03614 RCX: ffff88801ceb1e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e12e380 RBP: ffffc900001779f0 R08: ffffffff8fa3a437 R09: 1ffffffff1f47486 R10: dffffc0000000000 R11: fffffbfff1f47487 R12: dffffc0000000000 R13: 1ffff9200002ef20 R14: 0000000000000200 R15: 0000000000000041 _printk+0xcf/0x120 kernel/printk/printk.c:2475 synchronize_rcu_expedited_stall+0x61/0x1170 kernel/rcu/tree_exp.h:570 synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:668 [inline] rcu_exp_wait_wake kernel/rcu/tree_exp.h:687 [inline] rcu_exp_sel_wait_wake+0x867/0xe20 kernel/rcu/tree_exp.h:721 kthread_worker_fn+0x507/0xb60 kernel/kthread.c:1010 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x436/0x7d0 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245