------------[ cut here ]------------
WARNING: drivers/usb/gadget/udc/core.c:124 at usb_ep_enable+0x1b4/0x1d8 drivers/usb/gadget/udc/core.c:124, CPU#1: syslogd/2913
usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 2913 Comm: syslogd Not tainted syzkaller #0 PREEMPT 
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 r5:8233342c r4:00000001
[<80201a74>] (show_stack) from [<8021ec68>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201a74>] (show_stack) from [<8021ec68>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021ec0c>] (dump_stack_lvl) from [<8021ec94>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a20f78 r6:00000000 r5:8476b100 r4:82c83d40
[<8021ec7c>] (dump_stack) from [<80202590>] (vpanic+0x114/0x320 kernel/panic.c:651)
[<8020247c>] (vpanic) from [<802027d0>] (trace_suspend_resume+0x0/0x100 kernel/panic.c:788)
 r7:810bcfd4
[<8020279c>] (panic) from [<80251a80>] (check_panic_on_warn kernel/panic.c:525 [inline])
[<8020279c>] (panic) from [<80251a80>] (get_taint+0x0/0x1c kernel/panic.c:520)
 r3:82a0b144 r2:00000001 r1:82319190 r0:82320aec
[<80251a08>] (check_panic_on_warn) from [<80251bfc>] (__warn+0x98/0x1a4 kernel/panic.c:1104)
[<80251b64>] (__warn) from [<80251ef0>] (warn_slowpath_fmt+0x1e8/0x1f4 kernel/panic.c:1144)
 r8:00000009 r7:824544e8 r6:df805cac r5:8476b100 r4:00000000
[<80251d0c>] (warn_slowpath_fmt) from [<810bcfd4>] (usb_ep_enable+0x1b4/0x1d8 drivers/usb/gadget/udc/core.c:124)
 r10:85554ab0 r9:86665750 r8:83a7405c r7:8645b000 r6:00000000 r5:8645b2e4
 r4:83a7405c
[<810bce20>] (usb_ep_enable) from [<8111a704>] (hidg_set_alt+0x58/0x2bc drivers/usb/gadget/function/f_hid.c:1042)
 r7:8645b000 r6:00000000 r5:8645b2e4 r4:8645b2e4
[<8111a6ac>] (hidg_set_alt) from [<810b74d4>] (set_config drivers/usb/gadget/composite.c:1018 [inline])
[<8111a6ac>] (hidg_set_alt) from [<810b74d4>] (composite_setup+0x11a8/0x2160 drivers/usb/gadget/composite.c:1901)
 r10:86b69edc r9:86665750 r8:83a746b0 r7:8111a6ac r6:00000000 r5:8645b2e4
 r4:85554ab0 r3:00000004
[<810b632c>] (composite_setup) from [<810b9c30>] (configfs_composite_setup+0x6c/0x84 drivers/usb/gadget/configfs.c:1877)
 r10:854f5480 r9:83a74000 r8:85554d3c r7:df805e6c r6:a0000193 r5:85554ab0
 r4:83a746b0
[<810b9bc4>] (configfs_composite_setup) from [<810c3dc4>] (dummy_timer+0x8d8/0xff4 drivers/usb/gadget/udc/dummy_hcd.c:1951)
 r9:83a74000 r8:866d1400 r7:83a74000 r6:842ffdb4 r5:00000000 r4:866d1404
[<810c34ec>] (dummy_timer) from [<80332094>] (__run_hrtimer kernel/time/hrtimer.c:2032 [inline])
[<810c34ec>] (dummy_timer) from [<80332094>] (__hrtimer_run_queues+0x168/0x3a4 kernel/time/hrtimer.c:2096)
 r10:000000d6 r9:810c34ec r8:000000c0 r7:000000d6 r6:ddddc0c0 r5:ddddc1d0
 r4:842ffd68
[<80331f2c>] (__hrtimer_run_queues) from [<8033235c>] (hrtimer_run_softirq+0x8c/0xc8 kernel/time/hrtimer.c:2113)
 r10:8476b100 r9:00000000 r8:00000000 r7:00000020 r6:000000f0 r5:20000113
 r4:ddddc0c0
[<803322d0>] (hrtimer_run_softirq) from [<8025b0dc>] (handle_softirqs+0x160/0x4e4 kernel/softirq.c:622)
 r9:00000100 r8:00000101 r6:00000009 r5:00000008 r4:82a030a0
[<8025af7c>] (handle_softirqs) from [<8025b5fc>] (__do_softirq kernel/softirq.c:656 [inline])
[<8025af7c>] (handle_softirqs) from [<8025b5fc>] (invoke_softirq kernel/softirq.c:496 [inline])
[<8025af7c>] (handle_softirqs) from [<8025b5fc>] (__irq_exit_rcu+0x150/0x1d0 kernel/softirq.c:735)
 r10:00000000 r9:8476b100 r8:00000000 r7:ebcc9bd8 r6:824e71a0 r5:82522620
 r4:8476b100
[<8025b4ac>] (__irq_exit_rcu) from [<8025b934>] (irq_exit+0x10/0x18 kernel/softirq.c:764)
 r5:82522620 r4:828d3e6c
[<8025b924>] (irq_exit) from [<81b5db5c>] (generic_handle_arch_irq+0x7c/0x80 kernel/irq/handle.c:293)
[<81b5dae0>] (generic_handle_arch_irq) from [<81b2a7d8>] (call_with_stack+0x1c/0x20 arch/arm/lib/call_with_stack.S:40)
 r9:8476b100 r8:85dc8000 r7:ebcc9c0c r6:ffffffff r5:60000013 r4:802911ec
[<81b2a7bc>] (call_with_stack) from [<80200bec>] (__irq_svc+0x8c/0xbc arch/arm/kernel/entry-armv.S:228)
Exception stack(0xebcc9bd8 to 0xebcc9c20)
9bc0:                                                       00000001 8233342c
9be0: 00000000 00000001 ddde5580 82a0b444 828d4580 00000000 85dc8000 8476b100
9c00: 00000000 ebcc9c7c ebcc9c18 ebcc9c28 81b6bcf0 802911ec 60000013 ffffffff
[<802910f0>] (finish_task_switch) from [<81b619bc>] (context_switch kernel/sched/core.c:5513 [inline])
[<802910f0>] (finish_task_switch) from [<81b619bc>] (__schedule+0x540/0x146c kernel/sched/core.c:7234)
 r10:00000001 r9:85d42000 r8:00000000 r7:00000000 r6:8476b100 r5:8476b87c
 r4:84763100
[<81b6147c>] (__schedule) from [<81b62914>] (__schedule_loop kernel/sched/core.c:7311 [inline])
[<81b6147c>] (__schedule) from [<81b62914>] (schedule+0x2c/0xec kernel/sched/core.c:7326)
 r10:00000000 r9:85d93148 r8:ebcc9ddc r7:ebcc9de4 r6:8476b100 r5:85d93148
 r4:8476b100
[<81b628e8>] (schedule) from [<81b6ac34>] (schedule_timeout+0xcc/0x114 kernel/time/sleep_timeout.c:75)
 r5:85d93148 r4:7fffffff
[<81b6ab68>] (schedule_timeout) from [<81643e88>] (__skb_wait_for_more_packets+0x128/0x178 net/core/datagram.c:123)
 r6:8476b100 r5:85d93148 r4:85d930c0
[<81643d60>] (__skb_wait_for_more_packets) from [<81921218>] (__unix_dgram_recvmsg+0xc4/0x3a4 net/unix/af_unix.c:2596)
 r10:00000000 r9:85d93148 r8:ebcc9de4 r7:00000000 r6:85d93314 r5:85d930c0
 r4:fffffff5
[<81921154>] (__unix_dgram_recvmsg) from [<8192152c>] (unix_dgram_recvmsg+0x34/0x38 net/unix/af_unix.c:2682)
 r10:00004004 r9:00000001 r8:8476b100 r7:00000000 r6:8344f6c0 r5:ebcc9e70
 r4:819214f8
[<819214f8>] (unix_dgram_recvmsg) from [<816259d0>] (sock_recvmsg_nosec net/socket.c:1126 [inline])
[<819214f8>] (unix_dgram_recvmsg) from [<816259d0>] (sock_recvmsg+0x50/0x78 net/socket.c:1148)
 r5:ebcc9e70 r4:819214f8
[<81625980>] (sock_recvmsg) from [<81625a94>] (sock_read_iter+0x9c/0xf4 net/socket.c:1217)
 r7:83906980 r6:8344f6c0 r5:ebcc9f08 r4:ebcc9ef0
[<816259f8>] (sock_read_iter) from [<805a0948>] (new_sync_read fs/read_write.c:493 [inline])
[<816259f8>] (sock_read_iter) from [<805a0948>] (vfs_read fs/read_write.c:574 [inline])
[<816259f8>] (sock_read_iter) from [<805a0948>] (vfs_read+0x2d8/0x328 fs/read_write.c:554)
 r7:00000000 r6:0202f1d4 r5:83906980 r4:000000ff
[<805a0670>] (vfs_read) from [<805a13d4>] (ksys_read+0xcc/0xec fs/read_write.c:716)
 r10:00000003 r9:8476b100 r8:8020029c r7:000000ff r6:0202f1d4 r5:83906980
 r4:83906980
[<805a1308>] (ksys_read) from [<805a1404>] (__do_sys_read fs/read_write.c:725 [inline])
[<805a1308>] (ksys_read) from [<805a1404>] (sys_read+0x10/0x14 fs/read_write.c:723)
 r7:00000003 r6:0202f1a8 r5:00000000 r4:00000000
[<805a13f4>] (sys_read) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xebcc9fa8 to 0xebcc9ff0)
9fa0:                   00000000 00000000 00000000 0202f1d4 000000ff 00000000
9fc0: 00000000 00000000 0202f1a8 00000003 00000000 004b95ec 76fcc54c 76fcc548
9fe0: 00000001 7ed35c38 00000000 76df7590
Rebooting in 86400 seconds..