INFO: task syz-executor396:5067 blocked for more than 143 seconds. Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor396 state:D stack:27168 pid:5067 ppid:5064 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6695 schedule+0xe7/0x1b0 kernel/sched/core.c:6771 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x967/0x1340 kernel/locking/mutex.c:747 device_lock include/linux/device.h:992 [inline] usbdev_release+0x87/0x4b0 drivers/usb/core/devio.c:1096 __fput+0x3f7/0xa70 fs/file_table.c:384 __fput_sync+0x47/0x50 fs/file_table.c:465 __do_sys_close fs/open.c:1572 [inline] __se_sys_close fs/open.c:1557 [inline] __x64_sys_close+0x87/0xf0 fs/open.c:1557 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3161b680e0 RSP: 002b:00007fff7eb40f98 EFLAGS: 00000202 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f3161b680e0 RDX: 0000000000000007 RSI: 00007fff7eb40ad0 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000f4240 R13: 00007fff7eb41248 R14: 0000000000000001 R15: 00007fff7eb40fe0 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x299/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfac/0x1230 kernel/hung_task.c:379 kthread+0x33a/0x430 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 944 Comm: kworker/u4:6 Not tainted 6.5.0-syzkaller-08894-gb97d64c72259 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:insn_get_prefixes+0x5be/0x1120 arch/x86/lib/insn.c:180 Code: 48 c1 ea 03 80 3c 02 00 0f 85 ae 0a 00 00 31 ff 44 89 f6 4c 8b 6b 60 e8 b0 2c 57 f7 45 84 f6 0f 84 95 00 00 00 e8 72 31 57 f7 <49> 8d 44 24 01 49 39 c5 0f 82 cd 03 00 00 e8 5f 31 57 f7 4c 89 e2 RSP: 0018:ffffc9000473f7f0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffffc9000473fa20 RCX: 0000000000000000 RDX: ffff88802027d940 RSI: ffffffff8a300f1e RDI: 0000000000000001 RBP: ffffc9000473fa73 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff81dc8235 R13: ffffffff81dc8244 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557c8a182280 CR3: 000000000c776000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: insn_get_opcode+0x462/0xa30 arch/x86/lib/insn.c:272 insn_get_modrm+0x30e/0x730 arch/x86/lib/insn.c:343 insn_get_sib+0x1ad/0x320 arch/x86/lib/insn.c:421 insn_get_displacement+0x23a/0x680 arch/x86/lib/insn.c:464 insn_get_immediate+0x550/0x1c50 arch/x86/lib/insn.c:632 insn_get_length arch/x86/lib/insn.c:707 [inline] insn_decode+0x2ae/0x340 arch/x86/lib/insn.c:747 arch_jump_entry_size+0xb3/0x140 arch/x86/kernel/jump_label.c:24 __jump_label_patch+0x85/0x3f0 arch/x86/kernel/jump_label.c:45 arch_jump_label_transform_queue+0x7e/0x110 arch/x86/kernel/jump_label.c:137 __jump_label_update+0x125/0x420 kernel/jump_label.c:475 jump_label_update+0x32e/0x410 kernel/jump_label.c:829 static_key_disable_cpuslocked+0x154/0x1b0 kernel/jump_label.c:235 static_key_disable+0x1a/0x20 kernel/jump_label.c:243 toggle_allocation_gate mm/kfence/core.c:834 [inline] toggle_allocation_gate+0x13f/0x250 mm/kfence/core.c:821 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2600 worker_thread+0x687/0x1110 kernel/workqueue.c:2751 kthread+0x33a/0x430 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.756 msecs