watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.7.21:6241] Modules linked in: irq event stamp: 13527313 hardirqs last enabled at (13527312): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (13527313): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (12997066): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (12997066): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (12997066): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (12997069): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (12997069): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (12997069): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 6241 Comm: syz.7.21 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:lock_acquire+0x175/0x360 kernel/locking/lockdep.c:5872 Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 1b 0d f4 10 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e RSP: 0018:ffffc90000a07e10 EFLAGS: 00000206 RAX: ebf8a7f017a50000 RBX: 0000000000000000 RCX: ebf8a7f017a50000 RDX: 0000000000000000 RSI: ffffffff8d9d457d RDI: ffffffff8bc07360 RBP: ffffffff81cf5336 R08: 0000000000000000 R09: ffffffff81cf5336 R10: ffffc90000a07b08 R11: fffff52000140f63 R12: 0000000000000002 R13: ffffffff8e13d2e0 R14: 0000000000000000 R15: 0000000000000246 FS: 00007f993fee96c0(0000) GS:ffff888125e06000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f993fe86d58 CR3: 000000002f5da000 CR4: 00000000003526f0 Call Trace: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] rcu_read_lock include/linux/rcupdate.h:867 [inline] is_bpf_text_address+0x47/0x2b0 kernel/bpf/core.c:744 kernel_text_address+0xa5/0xe0 kernel/extable.c:125 __kernel_text_address+0xd/0x40 kernel/extable.c:79 unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369 arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x157/0x9c0 kernel/rcu/tree.c:3243 refdst_drop include/net/dst.h:266 [inline] skb_dst_drop include/net/dst.h:278 [inline] __dev_queue_xmit+0x85c/0x3b50 net/core/dev.c:4718 dev_queue_xmit include/linux/netdevice.h:3365 [inline] neigh_hh_output include/net/neighbour.h:531 [inline] neigh_output include/net/neighbour.h:545 [inline] ip6_finish_output2+0xf70/0x1480 net/ipv6/ip6_output.c:136 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x340/0x550 net/ipv6/ip6_output.c:247 NF_HOOK include/linux/netfilter.h:318 [inline] ndisc_send_skb+0xbce/0x1510 net/ipv6/ndisc.c:512 addrconf_rs_timer+0x369/0x670 net/ipv6/addrconf.c:4037 call_timer_fn+0x17e/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+0x286/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__schedule+0x10/0x4cc0 kernel/sched/core.c:6785 Code: ff cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 <53> 48 83 e4 e0 48 81 ec e0 01 00 00 41 89 fd 65 48 8b 05 c9 08 43 RSP: 0018:ffffc900044a6a90 EFLAGS: 00000282 RAX: ebf8a7f017a50000 RBX: ffff88802533bc80 RCX: ebf8a7f017a50000 RDX: 0000000000000000 RSI: ffffffff8d7eb243 RDI: 0000000000000001 RBP: ffffc900044a6ab0 R08: ffffffff8f9e1577 R09: 1ffffffff1f3c2ae R10: dffffc0000000000 R11: fffffbfff1f3c2af R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92000894d58 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7256 irqentry_exit+0x6f/0x90 kernel/entry/common.c:211 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline] RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline] RIP: 0010:unwind_next_frame+0x131f/0x2390 arch/x86/kernel/unwind_orc.c:494 Code: 00 49 01 ef 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 49 63 07 4c 01 f8 49 8d 4f 04 4c 39 e0 <48> 0f 46 e9 49 8d 47 fc 48 0f 47 d8 4d 0f 46 ef 48 39 dd 76 a2 e9 RSP: 0018:ffffc900044a6c38 EFLAGS: 00000297 RAX: ffffffff810000d2 RBX: ffffffff8fab9eac RCX: ffffffff8fab9eb0 RDX: ffffffff8fab9eac RSI: ffffffff90239ca6 RDI: ffffffff8bc07300 RBP: ffffffff8fab9eac R08: 0000000000000022 R09: ffffffff8173cd25 R10: ffffc900044a6848 R11: ffffffff81ac6cb0 R12: ffffffff8100012f R13: ffffffff8fab9eac R14: ffffc900044a6d08 R15: ffffffff8fab9eac arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2906 __kasan_populate_vmalloc mm/kasan/shadow.c:401 [inline] kasan_populate_vmalloc+0x256/0x270 mm/kasan/shadow.c:435 alloc_vmap_area+0xd7a/0x14c0 mm/vmalloc.c:2098 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3193 __vmalloc_node_range_noprof+0x30c/0x12d0 mm/vmalloc.c:3857 __vmalloc_node_noprof mm/vmalloc.c:3960 [inline] vmalloc_noprof+0xb2/0xf0 mm/vmalloc.c:3993 bpf_prog_calc_tag+0x4c/0x370 kernel/bpf/core.c:304 resolve_pseudo_ldimm64+0xbc/0xc50 kernel/bpf/verifier.c:20525 bpf_check+0x1c4a/0x1d720 kernel/bpf/verifier.c:24609 bpf_prog_load+0x13ba/0x19e0 kernel/bpf/syscall.c:3077 __sys_bpf+0x507/0x860 kernel/bpf/syscall.c:6149 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline] __se_sys_bpf kernel/bpf/syscall.c:6257 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6257 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f993ef8efc9 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:00007f993fee9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f993f1e5fa0 RCX: 00007f993ef8efc9 RDX: 0000000000000042 RSI: 00002000000006c0 RDI: 0000000000000005 RBP: 00007f993f011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f993f1e6038 R14: 00007f993f1e5fa0 R15: 00007fffbcd089e8 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5840 Comm: kworker/u9:6 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: hci4 hci_cmd_timeout RIP: 0010:__lock_acquire+0x799/0xd20 kernel/locking/lockdep.c:5227 Code: 84 34 05 00 00 83 bb 10 0b 00 00 00 48 89 df 0f 84 17 ff ff ff 48 8b 3c 24 4c 89 f6 ba 07 00 00 00 e9 48 02 00 00 45 8b 66 20 <48> 83 7c 24 68 00 4c 8b 6c 24 10 74 53 83 bf 28 0b 00 00 00 0f 8e RSP: 0018:ffffc900041a7150 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000006 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88807d51c8a0 RDI: ffff88807d51bc80 RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff851c367e R10: dffffc0000000000 R11: ffffffff851b1e40 R12: 00000000000c0060 R13: 0000000000000003 R14: ffff88807d51c8a0 R15: b97124805dd50a98 FS: 0000000000000000(0000) GS:ffff888125d06000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa05fde7dac CR3: 0000000031d40000 CR4: 00000000003526f0 Call Trace: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 uart_port_lock_irqsave include/linux/serial_core.h:717 [inline] serial8250_console_write+0x17e/0x1ba0 drivers/tty/serial/8250/8250_port.c:3301 console_emit_next_record kernel/printk/printk.c:3111 [inline] console_flush_all+0x6f3/0xb10 kernel/printk/printk.c:3199 __console_flush_and_unlock kernel/printk/printk.c:3258 [inline] console_unlock+0xbb/0x190 kernel/printk/printk.c:3298 vprintk_emit+0x4c5/0x590 kernel/printk/printk.c:2423 _printk+0xcf/0x120 kernel/printk/printk.c:2448 bt_err+0x10b/0x160 net/bluetooth/lib.c:296 hci_cmd_timeout+0xd8/0x1e0 net/bluetooth/hci_core.c:1469 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245