rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2688 jiffies s: 5077 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes NMI backtrace for cpu 0 CPU: 0 PID: 11172 Comm: modprobe Not tainted 6.6.0-syzkaller-14651-gd2f51b3516da #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:io_serial_in+0x87/0xa0 drivers/tty/serial/8250/8250_port.c:418 Code: b2 c7 fe 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 16 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 e8 ec 1c 15 ff eb a6 e8 45 1d 15 ff eb e3 RSP: 0018:ffffc900000073c8 EFLAGS: 00000002 RAX: dffffc0000000060 RBX: 00000000000003fd RCX: 0000000000000000 RDX: 00000000000003fd RSI: ffffffff82863e50 RDI: ffffffff8c176f60 RBP: ffffffff8c176f20 R08: 0000000000000001 R09: 000000000000001f R10: 0000000000000000 R11: 205d304320202020 R12: 0000000000000000 R13: 0000000000000020 R14: fffffbfff182ee3e R15: dffffc0000000000 FS: 00007f90d9471380(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f90d95dbfe4 CR3: 000000014298d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_in drivers/tty/serial/8250/8250.h:117 [inline] serial_lsr_in drivers/tty/serial/8250/8250.h:139 [inline] wait_for_lsr+0xd7/0x180 drivers/tty/serial/8250/8250_port.c:2088 serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3373 [inline] serial8250_console_write+0xc79/0x1060 drivers/tty/serial/8250/8250_port.c:3451 console_emit_next_record kernel/printk/printk.c:2901 [inline] console_flush_all+0x4d5/0xd50 kernel/printk/printk.c:2967 console_unlock+0x10c/0x260 kernel/printk/printk.c:3036 vprintk_emit+0x17f/0x5f0 kernel/printk/printk.c:2303 dev_vprintk_emit drivers/base/core.c:4850 [inline] dev_printk_emit+0xfb/0x140 drivers/base/core.c:4861 __dev_printk+0xf5/0x270 drivers/base/core.c:4873 _dev_err+0xe5/0x120 drivers/base/core.c:4916 wdm_int_callback+0x7d1/0xaa0 drivers/usb/class/cdc-wdm.c:276 __usb_hcd_giveback_urb+0x359/0x5c0 drivers/usb/core/hcd.c:1650 usb_hcd_giveback_urb+0x389/0x430 drivers/usb/core/hcd.c:1733 dummy_timer+0x1415/0x35f0 drivers/usb/gadget/udc/dummy_hcd.c:1987 call_timer_fn+0x193/0x580 kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x764/0xb10 kernel/time/timer.c:2022 run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035 __do_softirq+0x20a/0x94b kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0xa7/0x110 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x8e/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194 Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 e6 cc de fa 48 89 df e8 de 4b df fa f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f 01 00 00 00 e8 75 ba d3 fa 65 8b 05 16 ed b3 79 85 c0 74 12 5b RSP: 0018:ffffc90011c27598 EFLAGS: 00000246 RAX: 0000000000000006 RBX: ffffffff8c07af28 RCX: 1ffffffff16e55ba RDX: 0000000000000000 RSI: ffffffff8687cf80 RDI: ffffffff86a687c0 RBP: 0000000000000206 R08: 0000000000000001 R09: fffffbfff16e214b R10: ffffffff8b710a5f R11: ffff888115ac3cb0 R12: 0000000000000000 R13: ffff888141b5e408 R14: ffffffff868953a0 R15: 1ffff92002384eba debug_object_activate+0x27f/0x490 lib/debugobjects.c:745 debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline] __call_rcu_common.constprop.0+0x2c/0x790 kernel/rcu/tree.c:2652 ma_free_rcu lib/maple_tree.c:190 [inline] mas_free lib/maple_tree.c:1327 [inline] mas_replace_node lib/maple_tree.c:1761 [inline] mas_wr_node_store+0xdd3/0x18d0 lib/maple_tree.c:3995 mas_wr_modify lib/maple_tree.c:4229 [inline] mas_wr_store_entry.isra.0+0x548/0xe40 lib/maple_tree.c:4269 mas_store_prealloc+0xb3/0x270 lib/maple_tree.c:5460 vma_complete+0x8ff/0xdf0 mm/mmap.c:532 __split_vma+0xd06/0x1030 mm/mmap.c:2411 split_vma mm/mmap.c:2437 [inline] vma_modify+0x31e/0x450 mm/mmap.c:2479 vma_modify_flags include/linux/mm.h:3271 [inline] mprotect_fixup+0x1f1/0xc20 mm/mprotect.c:635 do_mprotect_pkey+0x84a/0xd50 mm/mprotect.c:809 __do_sys_mprotect mm/mprotect.c:830 [inline] __se_sys_mprotect mm/mprotect.c:827 [inline] __x64_sys_mprotect+0x78/0xb0 mm/mprotect.c:827 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f90d978fbb7 Code: 00 00 00 b8 0b 00 00 00 0f 05 48 3d 01 f0 ff ff 73 01 c3 48 8d 0d b9 46 01 00 f7 d8 89 01 48 83 c8 ff c3 b8 0a 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 99 46 01 00 f7 d8 89 01 48 83 RSP: 002b:00007ffe37c6c068 EFLAGS: 00000206 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 00007f90d9772ac0 RCX: 00007f90d978fbb7 RDX: 0000000000000001 RSI: 0000000000001000 RDI: 00007f90d94fa000 RBP: 00007ffe37c6c180 R08: 00007ffe37c6bff8 R09: 00007f90d97725c0 R10: 00007f90d94eec08 R11: 0000000000000206 R12: 00007f90d9772ac0 R13: 00007f90d9797eda R14: 00007f90d94faf98 R15: 00007f90d94fad98 imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 5-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: nonzero urb status received: -71 cdc_wdm 2-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 2-1:1.0: wdm_int_callback - usb_submit_urb failed with result -1 usb 2-1: yurex_control_callback - control failed: -2