BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 8538, name: syz.0.576
preempt_count: 0, expected: 0
RCU nest depth: 0, expected: 0
1 lock held by syz.0.576/8538:
 #0: ffff888144bdc058 (&dum_hcd->dum->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:44 [inline]
 #0: ffff888144bdc058 (&dum_hcd->dum->lock){+.+.}-{3:3}, at: dummy_dequeue+0x164/0x480 drivers/usb/gadget/udc/dummy_hcd.c:769
irq event stamp: 13528
hardirqs last  enabled at (13527): [<ffffffff8afa63e3>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
hardirqs last  enabled at (13527): [<ffffffff8afa63e3>] _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
hardirqs last disabled at (13528): [<ffffffff86fcad71>] dummy_dequeue+0x151/0x480 drivers/usb/gadget/udc/dummy_hcd.c:768
softirqs last  enabled at (11314): [<ffffffff8184dfa4>] __local_bh_enable_ip+0x1a4/0x270 kernel/softirq.c:262
softirqs last disabled at (11312): [<ffffffff89aaf63b>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (11312): [<ffffffff89aaf63b>] read_lock_bh include/linux/rwlock_rt.h:42 [inline]
softirqs last disabled at (11312): [<ffffffff89aaf63b>] inet6_fill_ifla6_attrs+0x116b/0x2400 net/ipv6/addrconf.c:5846
CPU: 0 UID: 0 PID: 8538 Comm: syz.0.576 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 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_read drivers/usb/gadget/legacy/raw_gadget.c:781 [inline]
 raw_ioctl+0x2609/0x3ba0 drivers/usb/gadget/legacy/raw_gadget.c:1315
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl+0xff/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: 0033:0x7f7438cce7ab
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:00007f7436f2bf60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f7438cce7ab
RDX: 00007f7436f2bfe0 RSI: 00000000c0085504 RDI: 0000000000000003
RBP: 00007f7438d51e19 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 00007f7436f2bfe8
R13: 0000000000000000 R14: 00007f7438f15fa0 R15: 00007ffee3e794d8
 </TASK>