------------[ cut here ]------------
usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
WARNING: CPU: 0 PID: 6103 at drivers/usb/gadget/udc/core.c:108 usb_ep_enable+0x25f/0x440 drivers/usb/gadget/udc/core.c:107
Modules linked in:
CPU: 0 PID: 6103 Comm: syz.1.499 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:usb_ep_enable+0x25f/0x440 drivers/usb/gadget/udc/core.c:107
Code: 49 8b 0e 48 c7 c0 00 29 d5 8a 49 c7 c0 20 29 d5 8a 4c 0f 44 c0 48 c7 c7 c0 28 d5 8a 48 c7 c6 63 bb e1 8b 89 ea e8 c1 70 80 03 <0f> 0b e9 e1 fe ff ff e8 85 3b 43 fb 49 bc 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000007688 EFLAGS: 00010046
RAX: b6779f38612a3300 RBX: ffff8880247e00e0 RCX: ffff88802a3c8000
RDX: 0000000000000100 RSI: 0000000080000103 RDI: 0000000000000000
RBP: 0000000000000081 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: dffffc0000000000
R13: ffff8880247e010d R14: ffff8880247e00e8 R15: ffff88802aa9e33a
FS: 000055557b232500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb44b3ceff8 CR3: 000000005f488000 CR4: 00000000003506f0
Call Trace:
hidg_set_alt+0x126/0xa00 drivers/usb/gadget/function/f_hid.c:822
set_config+0x734/0xfa0 drivers/usb/gadget/composite.c:972
composite_setup+0x1999/0x2b60 drivers/usb/gadget/composite.c:1878
configfs_composite_setup+0xc3/0x100 drivers/usb/gadget/configfs.c:1492
dummy_timer+0x1338/0x34a0 drivers/usb/gadget/udc/dummy_hcd.c:1944
call_timer_fn+0x17b/0x540 kernel/time/timer.c:1648
expire_timers kernel/time/timer.c:1699 [inline]
__run_timers+0x56c/0x810 kernel/time/timer.c:1970
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1983
handle_softirqs+0x336/0x830 kernel/softirq.c:576
__do_softirq kernel/softirq.c:610 [inline]
invoke_softirq kernel/softirq.c:450 [inline]
__irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:finish_lock_switch+0x12f/0x290 kernel/sched/core.c:4804
Code: 83 c7 18 be ff ff ff ff e8 8e da 6c 08 85 c0 74 46 4d 85 ff 75 62 e9 06 01 00 00 48 89 df e8 78 4a 76 08 e8 93 e3 2a 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 2f 0e fe ff 43 80 3c 2c
RSP: 0018:ffffc9000324f978 EFLAGS: 00000282
RAX: b6779f38612a3300 RBX: ffff888079091dc0 RCX: b6779f38612a3300
RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a48c0
RBP: 1ffff11017207613 R08: ffff8880b903a343 R09: 1ffff11017207468
R10: dffffc0000000000 R11: ffffed1017207469 R12: ffff8880b903b088
R13: dffffc0000000000 R14: ffff8880b903ae08 R15: 0000000000000000
finish_task_switch+0x12f/0x650 kernel/sched/core.c:4921
context_switch kernel/sched/core.c:5052 [inline]
__schedule+0x11cb/0x4350 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
freezable_schedule include/linux/freezer.h:172 [inline]
do_nanosleep+0x1cb/0x760 kernel/time/hrtimer.c:2026
hrtimer_nanosleep+0x33e/0x590 kernel/time/hrtimer.c:2079
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1314 [inline]
__se_sys_clock_nanosleep+0x30b/0x3a0 kernel/time/posix-timers.c:1291
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe26e71a98e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fffd4845f78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 000055557b232500 RCX: 00007fe26e71a98e
RDX: 00007fffd4845fd0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fe26e9e3da0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000003d373
R13: 00007fe26e9e209c R14: 000000000003d12b R15: 00007fe26e9e2090
----------------
Code disassembly (best guess):
0: 83 c7 18 add $0x18,%edi
3: be ff ff ff ff mov $0xffffffff,%esi
8: e8 8e da 6c 08 call 0x86cda9b
d: 85 c0 test %eax,%eax
f: 74 46 je 0x57
11: 4d 85 ff test %r15,%r15
14: 75 62 jne 0x78
16: e9 06 01 00 00 jmp 0x121
1b: 48 89 df mov %rbx,%rdi
1e: e8 78 4a 76 08 call 0x8764a9b
23: e8 93 e3 2a 00 call 0x2ae3bb
28: fb sti
29: 5b pop %rbx
* 2a: 41 5c pop %r12 <-- trapping instruction
2c: 41 5d pop %r13
2e: 41 5e pop %r14
30: 41 5f pop %r15
32: 5d pop %rbp
33: c3 ret
34: 48 89 df mov %rbx,%rdi
37: e8 2f 0e fe ff call 0xfffe0e6b
3c: 43 rex.XB
3d: 80 .byte 0x80
3e: 3c 2c cmp $0x2c,%al