watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [kworker/u9:2:50] Modules linked in: irq event stamp: 5669753 hardirqs last enabled at (5669752): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (5669753): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (5636212): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (5636215): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 50 Comm: kworker/u9:2 Not tainted 6.17.0-rc5-next-20250908 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: kvfree_rcu_reclaim kfree_rcu_monitor RIP: 0010:stack_access_ok+0xe5/0x1d0 Code: 3c 02 00 0f 85 e5 00 00 00 48 8b 73 28 48 89 da 48 89 ef e8 4d a6 f4 ff 85 c0 74 13 31 c0 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 06 26 89 03 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 08 48 89 fa RSP: 0018:ffff88806ce08758 EFLAGS: 00000296 RAX: ffff88806ce09001 RBX: 0000000000000002 RCX: 0000000000000002 RDX: ffff88806ce08c01 RSI: ffff88806ce08cc8 RDI: ffff88806ce087e0 RBP: ffff88806ce08828 R08: ffffffff86add1e4 R09: 0000000000000000 R10: 000000000003bef5 R11: 0000000000085fc8 R12: ffff88806ce08830 R13: ffff88806ce08818 R14: ffff88806ce08cd0 R15: ffff88806ce087d0 FS: 0000000000000000(0000) GS:ffff8880e55d7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005570ed565618 CR3: 0000000005a88000 CR4: 0000000000350ef0 Call Trace: unwind_next_frame+0xba4/0x2540 arch_stack_walk+0x86/0xf0 stack_trace_save+0x8e/0xc0 kasan_save_stack+0x24/0x50 kasan_record_aux_stack+0x89/0xa0 __call_rcu_common.constprop.0+0x70/0x960 kmem_cache_free+0x33a/0x540 skb_release_data+0x88d/0xa40 consume_skb+0xd0/0x160 mac80211_hwsim_tx_frame+0x1f6/0x2a0 mac80211_hwsim_beacon_tx+0x53f/0x940 __iterate_interfaces+0x2e0/0x650 ieee80211_iterate_active_interfaces_atomic+0x71/0x1b0 mac80211_hwsim_beacon+0x105/0x200 __hrtimer_run_queues+0x1ee/0xac0 hrtimer_run_softirq+0x14c/0x310 handle_softirqs+0x1b1/0x770 __irq_exit_rcu+0xc4/0x100 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:_raw_spin_unlock_irqrestore+0x34/0x50 Code: c7 18 53 48 89 f3 48 8b 74 24 10 e8 26 50 93 fc 48 89 ef e8 5e 9b 93 fc 80 e7 02 74 06 e8 54 b7 bd fc fb 65 ff 0d 3c 06 c6 02 <74> 07 5b 5d e9 43 23 00 00 0f 1f 44 00 00 5b 5d e9 37 23 00 00 0f RSP: 0018:ffff88800b287b08 EFLAGS: 00000246 RAX: 0000000000550e5f RBX: 0000000000000202 RCX: 0000000000000040 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84be89ec RBP: ffff88800e4d8378 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff8643a057 R11: 0000000000000001 R12: ffff88800d7c0900 R13: 0000000000000000 R14: ffff88800d7c0780 R15: ffff888008c41280 __delete_object+0x2b/0x50 kmem_cache_free_bulk+0x29b/0x610 kvfree_rcu_bulk+0x1a3/0x250 kfree_rcu_monitor+0x1a9/0x2b0 process_one_work+0x8e1/0x19c0 worker_thread+0x67e/0xe90 kthread+0x3c8/0x740 ret_from_fork+0x34b/0x430 ret_from_fork_asm+0x1a/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.17.0-rc5-next-20250908 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:pv_native_safe_halt+0x1e/0x30 Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d c9 51 09 00 0f 1f 44 00 00 fb f4 dd 83 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 RSP: 0018:ffff888009717e58 EFLAGS: 00000206 RAX: 0000000000202477 RBX: 0000000000000001 RCX: ffffffff84bc3c37 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814c8594 RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffed100d9e630a R10: ffff88806cf31853 R11: 0000000000000001 R12: ffffffff8643a050 R13: 1ffff110012e2fd2 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880e56d7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd78469000 CR3: 000000001bbf9000 CR4: 0000000000350ef0 Call Trace: default_idle+0xe/0x20 default_idle_call+0x6d/0xb0 do_idle+0x344/0x490 cpu_startup_entry+0x4f/0x60 start_secondary+0x1bd/0x210 common_startup_64+0x13e/0x148 ---------------- Code disassembly (best guess): 0: 3c 02 cmp $0x2,%al 2: 00 0f add %cl,(%rdi) 4: 85 e5 test %esp,%ebp 6: 00 00 add %al,(%rax) 8: 00 48 8b add %cl,-0x75(%rax) b: 73 28 jae 0x35 d: 48 89 da mov %rbx,%rdx 10: 48 89 ef mov %rbp,%rdi 13: e8 4d a6 f4 ff callq 0xfff4a665 18: 85 c0 test %eax,%eax 1a: 74 13 je 0x2f 1c: 31 c0 xor %eax,%eax 1e: 48 83 c4 08 add $0x8,%rsp 22: 5b pop %rbx 23: 5d pop %rbp 24: 41 5c pop %r12 26: 41 5d pop %r13 28: 41 5e pop %r14 * 2a: e9 06 26 89 03 jmpq 0x3892635 <-- trapping instruction 2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 36: fc ff df 39: 48 8d 7b 08 lea 0x8(%rbx),%rdi 3d: 48 89 fa mov %rdi,%rdx