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usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
WARNING: CPU: 0 PID: 7740 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: 7740 Comm: syz.3.676 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: 63b145932f334900 RBX: ffff888147d3c0e0 RCX: ffff88802a473b80
RDX: 0000000000000100 RSI: 0000000000000103 RDI: 0000000000000000
RBP: 0000000000000081 R08: ffff8880b902795b R09: 1ffff11017204f2b
R10: dffffc0000000000 R11: ffffed1017204f2c R12: dffffc0000000000
R13: ffff888147d3c10d R14: ffff888147d3c0e8 R15: ffff88805d5247b2
FS:  00007f6b94b3b6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6b8dad8000 CR3: 000000007654f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:unwind_next_frame+0x3dd/0x1cf0 arch/x86/kernel/unwind_orc.c:461
Code: 06 01 49 c7 c4 a0 99 28 8a 4d 8d 7c 24 04 4d 8d 74 24 05 4d 89 fd 49 c1 ed 03 48 bd 00 00 00 00 00 fc ff df 41 0f b6 44 2d 00 <84> c0 0f 85 f0 12 00 00 4c 89 f0 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc9000424eeb0 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffc9000424ef48 RCX: ffffffff8da121bc
RDX: ffffffff8e10a65e RSI: ffffffff8da121b8 RDI: ffffffff81351ed7
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000009
R10: dffffc0000000000 R11: fffff52000849df5 R12: ffffffff8e10a65e
R13: 1ffffffff1c214cc R14: ffffffff8e10a663 R15: ffffffff8e10a662
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 save_stack+0x121/0x230 mm/page_owner.c:119
 __set_page_owner+0x41/0x2d0 mm/page_owner.c:181
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x24f6/0x2670 mm/page_alloc.c:4192
 __alloc_pages+0x1ee/0x480 mm/page_alloc.c:5501
 alloc_pages_vma+0x2bc/0x790 mm/mempolicy.c:2146
 shmem_alloc_page mm/shmem.c:1586 [inline]
 shmem_alloc_and_acct_page+0x47f/0xbe0 mm/shmem.c:1611
 shmem_getpage_gfp+0x14be/0x2c10 mm/shmem.c:1906
 shmem_getpage mm/shmem.c:151 [inline]
 shmem_write_begin+0xcd/0x1a0 mm/shmem.c:2474
 generic_perform_write+0x2b6/0x550 mm/filemap.c:3785
 __generic_file_write_iter+0x261/0x4e0 mm/filemap.c:3912
 generic_file_write_iter+0xa6/0x1b0 mm/filemap.c:3944
 call_write_iter include/linux/fs.h:2179 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x748/0xd70 fs/read_write.c:594
 ksys_write+0x153/0x260 fs/read_write.c:647
 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: 0033:0x7f6b968a398e
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 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007f6b94b3ada8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f6b94b3b6c0 RCX: 00007f6b968a398e
RDX: 00000000013bd7ef RSI: 00007f6b8c71b000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f6b94b3aee0 R14: 00007f6b94b3aea0 R15: 00007f6b8c71b000
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	49 c7 c4 a0 99 28 8a 	mov    $0xffffffff8a2899a0,%r12
   7:	4d 8d 7c 24 04       	lea    0x4(%r12),%r15
   c:	4d 8d 74 24 05       	lea    0x5(%r12),%r14
  11:	4d 89 fd             	mov    %r15,%r13
  14:	49 c1 ed 03          	shr    $0x3,%r13
  18:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
  1f:	fc ff df
  22:	41 0f b6 44 2d 00    	movzbl 0x0(%r13,%rbp,1),%eax
* 28:	84 c0                	test   %al,%al <-- trapping instruction
  2a:	0f 85 f0 12 00 00    	jne    0x1320
  30:	4c 89 f0             	mov    %r14,%rax
  33:	48 c1 e8 03          	shr    $0x3,%rax
  37:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax
  3b:	84 c0                	test   %al,%al
  3d:	0f                   	.byte 0xf