------------[ cut here ]------------
WARNING: drivers/usb/gadget/udc/core.c:124 at usb_ep_enable+0x1b4/0x1d8 drivers/usb/gadget/udc/core.c:124, CPU#0: kdevtmpfs/25
usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 0 UID: 0 PID: 25 Comm: kdevtmpfs Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: ARM-Versatile Express
Call trace: frame pointer underflow
[<80201998>] (dump_backtrace) from [<80201a8c>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:82a20f78 r6:00000000 r5:82332d18 r4:00000001
[<80201a74>] (show_stack) from [<8021e5fc>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201a74>] (show_stack) from [<8021e5fc>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e5a0>] (dump_stack_lvl) from [<8021e628>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a20f78 r6:00000000 r5:833224c0 r4:82c83d40
[<8021e610>] (dump_stack) from [<80202590>] (vpanic+0x114/0x320 kernel/panic.c:651)
[<8020247c>] (vpanic) from [<802027d0>] (trace_suspend_resume+0x0/0x100 kernel/panic.c:788)
 r7:810bb38c
[<8020279c>] (panic) from [<80250a80>] (check_panic_on_warn kernel/panic.c:525 [inline])
[<8020279c>] (panic) from [<80250a80>] (get_taint+0x0/0x1c kernel/panic.c:520)
 r3:82a0b144 r2:00000001 r1:82318a7c r0:823203d8
[<80250a08>] (check_panic_on_warn) from [<80250bfc>] (__warn+0x98/0x1a4 kernel/panic.c:1104)
[<80250b64>] (__warn) from [<80250ef0>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:1144)
 r8:00000009 r7:82453b88 r6:df801cac r5:833224c0 r4:00000000
[<80250d0c>] (warn_slowpath_fmt) from [<810bb38c>] (usb_ep_enable+0x1b4/0x1d8 drivers/usb/gadget/udc/core.c:124)
 r10:8fa4aab0 r9:8b460010 r8:8332d05c r7:86397000 r6:00000000 r5:863972e4
 r4:8332d05c
[<810bb1d8>] (usb_ep_enable) from [<81118a9c>] (hidg_set_alt+0x58/0x2bc drivers/usb/gadget/function/f_hid.c:1042)
 r7:86397000 r6:00000000 r5:863972e4 r4:863972e4
[<81118a44>] (hidg_set_alt) from [<810b588c>] (set_config drivers/usb/gadget/composite.c:1018 [inline])
[<81118a44>] (hidg_set_alt) from [<810b588c>] (composite_setup+0x11a8/0x2160 drivers/usb/gadget/composite.c:1901)
 r10:8f9960dc r9:8b460010 r8:8332d6b0 r7:81118a44 r6:00000000 r5:863972e4
 r4:8fa4aab0 r3:00000004
[<810b46e4>] (composite_setup) from [<810b7fe8>] (configfs_composite_setup+0x6c/0x84 drivers/usb/gadget/configfs.c:1877)
 r10:8f922c00 r9:8332d000 r8:8fa4ad3c r7:df801e6c r6:a0000193 r5:8fa4aab0
 r4:8332d6b0
[<810b7f7c>] (configfs_composite_setup) from [<810c217c>] (dummy_timer+0x8d8/0xff4 drivers/usb/gadget/udc/dummy_hcd.c:1951)
 r9:8332d000 r8:8f92f880 r7:8332d000 r6:83e1adb4 r5:00000000 r4:8f92f884
[<810c18a4>] (dummy_timer) from [<80330fec>] (__run_hrtimer kernel/time/hrtimer.c:2032 [inline])
[<810c18a4>] (dummy_timer) from [<80330fec>] (__hrtimer_run_queues+0x168/0x3a4 kernel/time/hrtimer.c:2096)
 r10:0000019c r9:810c18a4 r8:000000c0 r7:0000019c r6:dddc80c0 r5:dddc81d0
 r4:83e1ad68
[<80330e84>] (__hrtimer_run_queues) from [<803312b4>] (hrtimer_run_softirq+0x8c/0xc8 kernel/time/hrtimer.c:2113)
 r10:833224c0 r9:00000000 r8:00000000 r7:00000020 r6:000000f0 r5:20000113
 r4:dddc80c0
[<80331228>] (hrtimer_run_softirq) from [<8025a0dc>] (handle_softirqs+0x160/0x4e4 kernel/softirq.c:622)
 r9:00000100 r8:00000101 r6:00000009 r5:00000008 r4:82a030a0
[<80259f7c>] (handle_softirqs) from [<8025a5fc>] (__do_softirq kernel/softirq.c:656 [inline])
[<80259f7c>] (handle_softirqs) from [<8025a5fc>] (invoke_softirq kernel/softirq.c:496 [inline])
[<80259f7c>] (handle_softirqs) from [<8025a5fc>] (__irq_exit_rcu+0x150/0x1d0 kernel/softirq.c:735)
 r10:00000000 r9:833224c0 r8:00000000 r7:df881d48 r6:824e6798 r5:82521c04
 r4:833224c0
[<8025a4ac>] (__irq_exit_rcu) from [<8025a934>] (irq_exit+0x10/0x18 kernel/softirq.c:764)
 r5:82521c04 r4:828d3e6c
[<8025a924>] (irq_exit) from [<81b5a4dc>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:293)
[<81b5a460>] (generic_handle_arch_irq) from [<81b2716c>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40)
 r9:833224c0 r8:00000000 r7:df881d7c r6:ffffffff r5:20000113 r4:802901b0
[<81b27150>] (call_with_stack) from [<80200bec>] (__irq_svc+0x8c/0xbc arch/arm/kernel/entry-armv.S:228)
Exception stack(0xdf881d48 to 0xdf881d90)
1d40:                   00000001 82332d18 00000001 833224c0 dddd1580 82a0b444
1d60: 828d4580 864edc00 00000000 833224c0 00000000 df881dec df881d88 df881d98
1d80: 81b68670 802901b0 20000113 ffffffff
[<802900f0>] (finish_task_switch) from [<81b5e33c>] (context_switch kernel/sched/core.c:5513 [inline])
[<802900f0>] (finish_task_switch) from [<81b5e33c>] (__schedule+0x540/0x146c kernel/sched/core.c:7234)
 r10:00000001 r9:00000000 r8:00000000 r7:864edc00 r6:833224c0 r5:803b5404
 r4:84106e40
[<81b5ddfc>] (__schedule) from [<81b5f4e0>] (preempt_schedule_common kernel/sched/core.c:7413 [inline])
[<81b5ddfc>] (__schedule) from [<81b5f4e0>] (preempt_schedule+0x4c/0xb4 kernel/sched/core.c:7437)
 r10:df881ef8 r9:86398488 r8:82b21e14 r7:802c5ca4 r6:00000001 r5:833224c0
 r4:81b68784
[<81b5f494>] (preempt_schedule) from [<81b68784>] (__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline])
[<81b5f494>] (preempt_schedule) from [<81b68784>] (_raw_spin_unlock_irqrestore+0x50/0x54 kernel/locking/spinlock.c:198)
 r7:dfb7dd38 r6:60000113 r5:dfb7dd40 r4:dfb7dcec
[<81b68734>] (_raw_spin_unlock_irqrestore) from [<802c5ca4>] (complete_with_flags kernel/sched/completion.c:30 [inline])
[<81b68734>] (_raw_spin_unlock_irqrestore) from [<802c5ca4>] (complete+0x80/0x84 kernel/sched/completion.c:52)
[<802c5c24>] (complete) from [<81b5db74>] (devtmpfs_work_loop drivers/base/devtmpfs.c:401 [inline])
[<802c5c24>] (complete) from [<81b5db74>] (devtmpfsd+0x440/0x4b8 drivers/base/devtmpfs.c:441)
 r7:dfb7dd38 r6:00002180 r5:8597f000 r4:00000000
[<81b5d734>] (devtmpfsd) from [<80281710>] (kthread+0x11c/0x154 kernel/kthread.c:436)
 r10:00000000 r9:df819eb0 r8:831d6380 r7:df819f1c r6:81b5d734 r5:833224c0
 r4:83113900
[<802815f4>] (kthread) from [<80200114>] (ret_from_fork+0x14/0x20 arch/arm/kernel/entry-common.S:137)
Exception stack(0xdf881fb0 to 0xdf881ff8)
1fa0:                                     00000000 00000000 00000000 00000000
1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:802815f4 r4:83113900
Rebooting in 86400 seconds..