rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2682 jiffies s: 1745 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: cdc_wdm 1-1:1.0: nonzero urb status received: -71 NMI backtrace for cpu 0 CPU: 0 PID: 13660 Comm: syz-fuzzer 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_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:424 Code: 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 18 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d c3 e8 95 1d 15 ff eb a4 e8 ee 1d 15 ff eb e1 66 RSP: 0018:ffffc90000007400 EFLAGS: 00000006 RAX: 0000000000000000 RBX: 00000000000003f9 RCX: 0000000000000000 RDX: 00000000000003f9 RSI: ffffffff82863da5 RDI: ffffffff8c176f60 RBP: ffffffff8c176f20 R08: 0000000000000001 R09: 000000000000001f R10: 0000000000000000 R11: 205d323636303154 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8c176f70 R15: 0000000000000018 FS: 000000c000b22c90(0000) GS:ffff8881f6600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffeee302ff8 CR3: 0000000109b8d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_out drivers/tty/serial/8250/8250.h:122 [inline] serial8250_clear_IER+0x98/0xb0 drivers/tty/serial/8250/8250_port.c:717 serial8250_console_write+0x18e/0x1060 drivers/tty/serial/8250/8250_port.c:3416 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+0x10f/0xaa0 drivers/usb/class/cdc-wdm.c:269 __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:tomoyo_pathcmp security/tomoyo/common.h:1165 [inline] RIP: 0010:tomoyo_find_domain+0x170/0x250 security/tomoyo/util.c:622 Code: 7b 20 49 8d 7f 08 48 89 f8 48 c1 e8 03 0f b6 14 28 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 a4 00 00 00 45 8b 77 08 <44> 89 e7 44 89 f6 e8 45 5e 3b ff 45 39 f4 0f 85 46 ff ff ff e8 47 RSP: 0018:ffffc900005679f0 EFLAGS: 00000246 RAX: 0000000000000003 RBX: ffff88810dfa6080 RCX: ffffffff82128cd5 RDX: 0000000000000000 RSI: ffffffff82128cdf RDI: ffff88810b64fc20 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000029884966 R13: 1ffff920000acf3f R14: 00000000615416b5 R15: ffff88810b64fc18 tomoyo_assign_domain+0xad/0x820 security/tomoyo/domain.c:526 tomoyo_find_next_domain+0x61a/0x2020 security/tomoyo/domain.c:846 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline] tomoyo_bprm_check_security+0x12b/0x1d0 security/tomoyo/tomoyo.c:91 security_bprm_check+0x6a/0xe0 security/security.c:1103 search_binary_handler fs/exec.c:1725 [inline] exec_binprm fs/exec.c:1779 [inline] bprm_execve fs/exec.c:1854 [inline] bprm_execve+0x73a/0x1a80 fs/exec.c:1810 do_execveat_common.isra.0+0x5d3/0x740 fs/exec.c:1962 do_execve fs/exec.c:2036 [inline] __do_sys_execve fs/exec.c:2112 [inline] __se_sys_execve fs/exec.c:2107 [inline] __x64_sys_execve+0x8c/0xb0 fs/exec.c:2107 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: 0033:0x403ace Code: 48 89 6c 24 38 48 8d 6c 24 38 e8 0d 00 00 00 48 8b 6c 24 38 48 83 c4 40 c3 cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48 RSP: 002b:000000c0001930f8 EFLAGS: 00000206 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 000000c001208270 RCX: 0000000000403ace RDX: 000000c001332a20 RSI: 000000c0004f8078 RDI: 000000c001208270 RBP: 000000c000193138 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000004b4ff4 R13: 0000000000000022 R14: 000000c0000a9d40 R15: 000000c000b22c00 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored imon 2-1:0.0: imon usb_rx_callback_intf0: status(-71): ignored cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: nonzero urb status received: -71 cdc_wdm 1-1:1.0: wdm_int_callback - 0 bytes cdc_wdm 1-1:1.0: wdm_int_callback - usb_submit_urb failed with result -19 usb 6-1: new high-speed USB device number 49 using dummy_hcd usb 6-1: Using ep0 maxpacket: 8 usb 6-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config usb 6-1: New USB device found, idVendor=0bd3, idProduct=0d55, bcdDevice=69.6a usb 6-1: New USB device strings: Mfr=64, Product=0, SerialNumber=0 usb 6-1: Manufacturer: syz usb 6-1: config 0 descriptor?? usb 6-1: Found UVC 0.00 device (0bd3:0d55) usb 6-1: Failed to initialize entity for entity 255 usb 6-1: Failed to register entities (-22).