INFO: task syz.8.2603:8140 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.2603      state:D stack:0     pid:8140  tgid:8140  ppid:3092   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5996 [inline]
 __schedule+0x134a/0x1dd0 kernel/sched/core.c:7842
 __schedule_loop kernel/sched/core.c:7923 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7938
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xdee/0x1b10 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xad9/0x2020 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xc0/0x160 fs/open.c:1565
 __range_close fs/file.c:710 [inline]
 __close_range+0x529/0x6e0 fs/file.c:767
 __do_sys_close_range fs/open.c:1618 [inline]
 __se_sys_close_range fs/open.c:1615 [inline]
 __x64_sys_close_range+0x7e/0x90 fs/open.c:1615
 x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6e9cf9aeb9
RSP: 002b:00007ffee5ebf218 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffee5ebf300 RCX: 00007f6e9cf9aeb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000004fdb8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2d320000 R11: 0000000000000246 R12: 00007ffee5ebf340
R13: 00007f6e9d215fac R14: 000000000004fe21 R15: 00007f6e9d215fa0
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 fb5d95c0c59ed9c9506888f7deb6b66e4fe9f746
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:267 [inline]
 watchdog+0xdad/0xf00 kernel/hung_task.c:423
 kthread+0x2c6/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
raw-gadget.1 gadget.9: ignoring, device is not running
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 99 Comm: klogd Not tainted syzkaller #0 fb5d95c0c59ed9c9506888f7deb6b66e4fe9f746
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:io_serial_out+0x85/0xd0 drivers/tty/serial/8250/8250_port.c:413
Code: fe 44 89 e1 41 d3 e6 49 83 c7 08 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 ff e8 e4 c7 bc fe 45 03 37 89 d8 44 89 f2 ee <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 e1 80 e1 07
RSP: 0018:ffffc90000007188 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020
RBP: ffffc900000071b0 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83229660 R12: 0000000000000000
R13: dffffc0000000000 R14: 00000000000003f9 R15: ffffffff88c0f508
FS:  00007feea2a57c80(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9945be1198 CR3: 000000010cbd2000 CR4: 00000000003526b0
Call Trace:
 <IRQ>
 serial_out drivers/tty/serial/8250/8250.h:142 [inline]
 serial8250_clear_IER drivers/tty/serial/8250/8250_port.c:-1 [inline]
 serial8250_console_write+0x3bb/0x21a0 drivers/tty/serial/8250/8250_port.c:3386
 univ8250_console_write+0x6f/0xb0 drivers/tty/serial/8250/8250_core.c:396
 console_emit_next_record kernel/printk/printk.c:3151 [inline]
 console_flush_all+0x5fd/0xac0 kernel/printk/printk.c:3239
 __console_flush_and_unlock kernel/printk/printk.c:3298 [inline]
 console_unlock+0xf8/0x2c0 kernel/printk/printk.c:3338
 vprintk_emit+0x282/0x650 kernel/printk/printk.c:2462
 dev_vprintk_emit+0x359/0x420 drivers/base/core.c:4962
 dev_printk_emit+0xef/0x150 drivers/base/core.c:4973
 __dev_printk+0x17f/0x1b0 drivers/base/core.c:4985
 _dev_err+0x11f/0x180 drivers/base/core.c:5028
 gadget_setup+0x286/0x410 drivers/usb/gadget/legacy/raw_gadget.c:346
 dummy_timer+0x2b20/0x4220 drivers/usb/gadget/udc/dummy_hcd.c:1925
 __run_hrtimer kernel/time/hrtimer.c:1753 [inline]
 __hrtimer_run_queues+0x3c6/0x9e0 kernel/time/hrtimer.c:1817
 hrtimer_run_softirq+0x159/0x560 kernel/time/hrtimer.c:1834
 handle_softirqs+0x1ad/0x630 kernel/softirq.c:621
 __do_softirq kernel/softirq.c:659 [inline]
 invoke_softirq kernel/softirq.c:476 [inline]
 __irq_exit_rcu+0x47/0xb0 kernel/softirq.c:708
 irq_exit_rcu+0xd/0x30 kernel/softirq.c:720
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x82/0x90 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:702
RIP: 0010:format_decode+0x7fb/0x1610 lib/vsprintf.c:2613
Code: 49 89 dd 49 21 cd 48 b9 00 00 00 00 00 0a 00 00 4c 09 e9 48 89 4d 98 48 89 08 4c 8b 75 c8 4d 89 f7 49 c1 ef 03 41 0f b6 04 17 <84> c0 0f 85 a1 06 00 00 45 0f b6 26 4c 89 e7 48 c7 c6 40 c4 e2 87
RSP: 0018:ffffc90000e5f768 EFLAGS: 00000a06
RAX: 0000000000000005 RBX: ffff0a1000000600 RCX: ffff0a1000000600
RDX: dffffc0000000000 RSI: 0000000000000075 RDI: 000000000000006c
RBP: ffffc90000e5f7d8 R08: ffff88810cb51300 R09: 0000000000000005
R10: 000000000000007a R11: 0000000000000000 R12: ffffffff85e92629
R13: ffff001000000600 R14: ffffffff85e9262a R15: 1ffffffff0bd24c5
 vsnprintf+0xe6/0x1ad0 lib/vsprintf.c:2755
 sprintf+0xe8/0x140 lib/vsprintf.c:3007
 print_time kernel/printk/printk.c:1387 [inline]
 info_print_prefix+0x183/0x4a0 kernel/printk/printk.c:1416
 record_print_text+0x177/0x450 kernel/printk/printk.c:1465
 syslog_print+0x3c0/0x6f0 kernel/printk/printk.c:1676
 do_syslog+0x584/0x7f0 kernel/printk/printk.c:1794
 __do_sys_syslog kernel/printk/printk.c:1886 [inline]
 __se_sys_syslog kernel/printk/printk.c:1884 [inline]
 __x64_sys_syslog+0x80/0x90 kernel/printk/printk.c:1884
 x64_sys_call+0x19e6/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:104
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7feea2c21a37
Code: 73 01 c3 48 8b 0d c1 f3 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 f3 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdb1bba0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007feea2dc1490 RCX: 00007feea2c21a37
RDX: 00000000000003ff RSI: 00007feea2dc1490 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000206 R12: 00007feea2dc1490
R13: 00007feea2d9edfe R14: 00007feea2dc15a4 R15: 00007feea2dc15a4
 </TASK>
raw-gadget.1 gadget.9: ignoring, device is not running
raw-gadget.1 gadget.9: ignoring, device is not running
raw-gadget.1 gadget.9: ignoring, device is not running