watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz-executor.2:24309] Modules linked in: irq event stamp: 29084 hardirqs last enabled at (29083): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 hardirqs last disabled at (29084): [] idtentry_enter_cond_rcu+0x2e/0x50 arch/x86/entry/common.c:607 softirqs last enabled at (9504): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 softirqs last disabled at (9497): [] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 CPU: 1 PID: 24309 Comm: syz-executor.2 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:csd_lock_wait kernel/smp.c:108 [inline] RIP: 0010:smp_call_function_single+0x302/0x450 kernel/smp.c:382 Code: 2f 44 89 ee 83 e6 01 31 ff e8 6a 04 0b 00 41 83 e5 01 75 14 e8 4f 00 0b 00 eb 45 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 0d 41 f6 07 01 74 22 e8 2a 00 0b 00 eb e8 RSP: 0018:ffffc90017adf700 EFLAGS: 00000246 RAX: ffffffff81697be6 RBX: 1ffff92002f5bee5 RCX: 0000000000040000 RDX: ffffc9000d7aa000 RSI: 000000000003ffff RDI: 0000000000040000 RBP: ffffc90017adf790 R08: ffffffff81697bb6 R09: ffffed1015d06d11 R10: ffffed1015d06d11 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffffc90017adf728 FS: 00007f9cac920700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000073d058 CR3: 0000000093ba9000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: on_each_cpu_cond_mask+0x54/0x240 kernel/smp.c:766 __flush_tlb_others arch/x86/include/asm/paravirt.h:74 [inline] flush_tlb_others arch/x86/mm/tlb.c:856 [inline] flush_tlb_mm_range+0x304/0x450 arch/x86/mm/tlb.c:943 flush_tlb_page arch/x86/include/asm/tlbflush.h:235 [inline] ptep_clear_flush+0x111/0x150 mm/pgtable-generic.c:97 wp_page_copy+0xdc6/0x1ff0 mm/memory.c:2713 do_wp_page+0x35e/0x1810 mm/memory.c:2982 handle_pte_fault mm/memory.c:4243 [inline] __handle_mm_fault mm/memory.c:4357 [inline] handle_mm_fault+0x244c/0x2960 mm/memory.c:4394 do_user_addr_fault+0x52b/0xba0 arch/x86/mm/fault.c:1295 handle_page_fault arch/x86/mm/fault.c:1365 [inline] exc_page_fault+0x124/0x1f0 arch/x86/mm/fault.c:1418 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:565 RIP: 0010:copy_user_generic_unrolled+0x89/0xc0 arch/x86/lib/copy_user_64.S:91 Code: 38 4c 89 47 20 4c 89 4f 28 4c 89 57 30 4c 89 5f 38 48 8d 76 40 48 8d 7f 40 ff c9 75 b6 89 d1 83 e2 07 c1 e9 03 74 12 4c 8b 06 <4c> 89 07 48 8d 76 08 48 8d 7f 08 ff c9 75 ee 21 d2 74 10 89 d1 8a RSP: 0018:ffffc90017adfcf8 EFLAGS: 00010206 RAX: ffffffff839d1901 RBX: 000000000073d080 RCX: 0000000000000005 RDX: 0000000000000000 RSI: ffffc90017adfd48 RDI: 000000000073d058 RBP: 000000000073d058 R08: 0000000000006f6c R09: fffff52002f5bfae R10: fffff52002f5bfae R11: 0000000000000000 R12: 0000000000000028 R13: 00007ffffffff000 R14: ffffc90017adfd48 R15: 000000000073d058 copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline] raw_copy_to_user arch/x86/include/asm/uaccess_64.h:74 [inline] _copy_to_user+0x100/0x140 lib/usercopy.c:30 copy_to_user include/linux/uaccess.h:152 [inline] inet_gifconf+0x23d/0x410 net/ipv4/devinet.c:1274 dev_ifconf+0x124/0x220 net/core/dev_ioctl.c:78 sock_do_ioctl+0x130/0x260 net/socket.c:1062 sock_ioctl+0x4aa/0x690 net/socket.c:1199 vfs_ioctl fs/ioctl.c:48 [inline] ksys_ioctl fs/ioctl.c:753 [inline] __do_sys_ioctl fs/ioctl.c:762 [inline] __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:760 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f9cac91fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004e9f60 RCX: 000000000045cb29 RDX: 0000000000400200 RSI: 0000000000008912 RDI: 0000000000000004 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000423 R14: 00000000004c6f7d R15: 00007f9cac9206d4 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 24312 Comm: syz-executor.2 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:get_current kernel/locking/lockdep.c:4985 [inline] RIP: 0010:lock_is_held_type+0x0/0xe0 kernel/locking/lockdep.c:4989 Code: 01 00 75 ea 48 c7 c7 56 e2 e6 88 48 c7 c6 46 72 e8 88 31 c0 e8 f1 d4 29 f9 0f 0b eb d1 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 <55> 41 57 41 56 41 55 41 54 53 65 4c 8b 24 25 00 fe 01 00 41 83 bc RSP: 0018:ffffc90000007d18 EFLAGS: 00000097 RAX: 0000000000010002 RBX: 0000000000000001 RCX: ffff888044130580 RDX: ffff888044130580 RSI: 00000000ffffffff RDI: ffff8880a7745b00 RBP: ffff8880a7745800 R08: ffffffff869a4bc7 R09: fffff52000000f9c R10: fffff52000000f9c R11: 0000000000000000 R12: ffff8880a7745b40 R13: dffffc0000000000 R14: ffff8880a7745ae8 R15: ffff8880a7745b40 FS: 00007f9cac8ff700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000078c000 CR3: 0000000093ba9000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_is_held include/linux/lockdep.h:425 [inline] advance_sched+0x80/0x8c0 net/sched/sch_taprio.c:700 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x47f/0x930 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] __sysvec_apic_timer_interrupt+0xf0/0x260 arch/x86/kernel/apic/apic.c:1097 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:711 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_apic_timer_interrupt+0xb9/0x130 arch/x86/kernel/apic/apic.c:1091 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:596 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:765 [inline] RIP: 0010:on_each_cpu+0x187/0x1f0 kernel/smp.c:702 Code: c1 e8 03 42 80 3c 20 00 74 0c 48 c7 c7 f0 c7 2b 89 e8 7d eb 49 00 48 83 3d 65 38 c2 07 00 74 6a e8 7e ec 0a 00 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 5a fa e6 ff 65 8b 1d 5f 6e 98 7e RSP: 0018:ffffc90017b7fe38 EFLAGS: 00000282 RAX: ffffffff81698f92 RBX: 0000000000000282 RCX: 0000000000040000 RDX: ffffc9000dab9000 RSI: 0000000000000317 RDI: 0000000000000282 RBP: ffffffff81669716 R08: ffffffff817a1d20 R09: ffffed1015d04eb1 R10: ffffed1015d04eb1 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000282 R14: 0000000000000000 R15: ffffffff8164b430 clock_was_set+0x18/0x20 kernel/time/hrtimer.c:872 do_settimeofday64+0x41e/0x520 kernel/time/timekeeping.c:1257 __do_sys_clock_settime kernel/time/posix-timers.c:1079 [inline] __se_sys_clock_settime kernel/time/posix-timers.c:1067 [inline] __x64_sys_clock_settime+0x196/0x1c0 kernel/time/posix-timers.c:1067 do_syscall_64+0x73/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007f9cac8fec78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 00000000004db560 RCX: 000000000045cb29 RDX: 0000000000000000 RSI: 0000000020000400 RDI: 0000000000000000 RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000007b R14: 00000000004c34ac R15: 00007f9cac8ff6d4