BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 6612, name: syz.4.181 preempt_count: 0, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz.4.181/6612: #0: ffff888145314058 (&dum_hcd->dum->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:44 [inline] #0: ffff888145314058 (&dum_hcd->dum->lock){+.+.}-{3:3}, at: dummy_dequeue+0x164/0x480 drivers/usb/gadget/udc/dummy_hcd.c:769 irq event stamp: 2040 hardirqs last enabled at (2039): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (2039): [] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 hardirqs last disabled at (2040): [] dummy_dequeue+0x151/0x480 drivers/usb/gadget/udc/dummy_hcd.c:768 softirqs last enabled at (0): [] rcu_lock_acquire include/linux/rcupdate.h:331 [inline] softirqs last enabled at (0): [] rcu_read_lock include/linux/rcupdate.h:841 [inline] softirqs last enabled at (0): [] copy_process+0x979/0x3ae0 kernel/fork.c:2043 softirqs last disabled at (0): [<0000000000000000>] 0x0 CPU: 1 UID: 0 PID: 6612 Comm: syz.4.181 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 __might_resched+0x44b/0x5d0 kernel/sched/core.c:8957 __rt_spin_lock kernel/locking/spinlock_rt.c:48 [inline] rt_spin_lock+0xc7/0x2c0 kernel/locking/spinlock_rt.c:57 spin_lock include/linux/spinlock_rt.h:44 [inline] dummy_dequeue+0x164/0x480 drivers/usb/gadget/udc/dummy_hcd.c:769 usb_ep_dequeue+0x66/0x250 drivers/usb/gadget/udc/core.c:330 raw_process_ep0_io+0x435/0x980 drivers/usb/gadget/legacy/raw_gadget.c:738 raw_ioctl_ep0_write drivers/usb/gadget/legacy/raw_gadget.c:766 [inline] raw_ioctl+0x22f6/0x3ba0 drivers/usb/gadget/legacy/raw_gadget.c:1312 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffbc0c2e7eb Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007ffbbee6af10 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007ffbc0c2e7eb RDX: 00007ffbbee6afd0 RSI: 0000000040085503 RDI: 0000000000000005 RBP: 00007ffbbee6bfe0 R08: 0000000000000080 R09: 00007ffbbee6afd8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502 R13: 0000000800000000 R14: 0000000000000012 R15: 00007ffbc0cbd391