mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [kworker/1:2:11396] Modules linked in: irq event stamp: 74806432 hardirqs last enabled at (74806431): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (74806431): [] _raw_spin_unlock_irqrestore+0x38/0x40 kernel/locking/spinlock.c:191 hardirqs last disabled at (74806432): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (165134): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (165091): [] asm_call_irq_on_stack+0x12/0x20 CPU: 1 PID: 11396 Comm: kworker/1:2 Not tainted 5.10.209 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Workqueue: events rtc_timer_do_work RIP: 0010:__preempt_count_sub arch/x86/include/asm/preempt.h:84 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x40 kernel/locking/spinlock.c:191 Code: 3a 00 0f 1f 00 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 6a fa 40 fd 48 89 ef e8 32 b4 41 fd f6 c7 02 75 10 53 9d <65> ff 0d 44 4d 1c 7c 5b 5d e9 7d 1e 3a 00 e8 88 d6 60 fd eb e9 66 RSP: 0018:ffff88800c9a7b58 EFLAGS: 00000293 RAX: 000000000475749f RBX: 0000000000000293 RCX: 1ffffffff0d0fdba RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff83e62208 RBP: ffff88800f880650 R08: 0000000000000001 R09: ffffffff8686172f R10: fffffbfff0d0c2e5 R11: 0000000000000001 R12: ffff88800f880740 R13: 1b2971d6b272d000 R14: ffffffff82e7c9c0 R15: ffff88800f8807c8 FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdb9d0dc718 CR3: 0000000004e26000 CR4: 0000000000350ee0 Call Trace: spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] rtc_handle_legacy_irq drivers/rtc/interface.c:627 [inline] rtc_uie_update_irq+0x5c/0xa0 drivers/rtc/interface.c:652 rtc_timer_do_work+0x282/0xbd0 drivers/rtc/interface.c:927 process_one_work+0x9a9/0x14b0 kernel/workqueue.c:2282 worker_thread+0x61d/0x1310 kernel/workqueue.c:2428 kthread+0x38f/0x470 kernel/kthread.c:313 ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:299 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 0 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:706 ---------------- Code disassembly (best guess): 0: 3a 00 cmp (%rax),%al 2: 0f 1f 00 nopl (%rax) 5: 55 push %rbp 6: 48 89 fd mov %rdi,%rbp 9: 48 83 c7 18 add $0x18,%rdi d: 53 push %rbx e: 48 89 f3 mov %rsi,%rbx 11: 48 8b 74 24 10 mov 0x10(%rsp),%rsi 16: e8 6a fa 40 fd callq 0xfd40fa85 1b: 48 89 ef mov %rbp,%rdi 1e: e8 32 b4 41 fd callq 0xfd41b455 23: f6 c7 02 test $0x2,%bh 26: 75 10 jne 0x38 28: 53 push %rbx 29: 9d popfq * 2a: 65 ff 0d 44 4d 1c 7c decl %gs:0x7c1c4d44(%rip) # 0x7c1c4d75 <-- trapping instruction 31: 5b pop %rbx 32: 5d pop %rbp 33: e9 7d 1e 3a 00 jmpq 0x3a1eb5 38: e8 88 d6 60 fd callq 0xfd60d6c5 3d: eb e9 jmp 0x28 3f: 66 data16