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usb_ep_enable: ep129 (ep1in-bulk) has maxpacket 0
WARNING: CPU: 1 PID: 4511 at drivers/usb/gadget/udc/core.c:108 usb_ep_enable+0x25f/0x440 drivers/usb/gadget/udc/core.c:107
Modules linked in:
CPU: 1 PID: 4511 Comm: syz.4.68 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 80 27 d5 8a 49 c7 c0 a0 27 d5 8a 4c 0f 44 c0 48 c7 c7 40 27 d5 8a 48 c7 c6 1d 96 e1 8b 89 ea e8 c1 94 7f 03 <0f> 0b e9 e1 fe ff ff e8 95 67 43 fb 49 bc 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90000dd06a8 EFLAGS: 00010046
RAX: ba8dcd95513f1800 RBX: ffff888147d500e0 RCX: ffff8880288f5940
RDX: 0000000000000100 RSI: 0000000000000102 RDI: 0000000000000000
RBP: 0000000000000081 R08: ffff8880b912795b R09: 1ffff11017224f2b
R10: dffffc0000000000 R11: ffffed1017224f2c R12: dffffc0000000000
R13: ffff888147d5010d R14: ffff888147d500e8 R15: ffff88801f020e3a
FS:  00007f84344806c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000d030 CR3: 000000005fc80000 CR4: 00000000003506e0
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+0x1338/0x33c0 drivers/usb/gadget/udc/dummy_hcd.c:1930
 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:__skb_datagram_iter+0x1ac/0x740 net/core/datagram.c:435
Code: 0f 85 73 05 00 00 49 89 ed 4c 89 64 24 30 45 8b 34 24 4e 8d 64 33 02 4c 89 e0 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 77 05 00 00 <4c> 01 f3 41 0f b6 2c 24 31 ff 89 ee e8 03 bf 95 f9 85 ed 0f 84 85
RSP: 0018:ffffc90003c7f6b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880613b1000 RCX: 0000000000080000
RDX: dffffc0000000000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff87e34780
R10: dffffc0000000000 R11: fffffbfff1b161be R12: ffff8880613b10c2
R13: 0000000000000000 R14: 00000000000000c0 R15: 0000000000000000
 skb_copy_datagram_iter+0xad/0x1f0 net/core/datagram.c:541
 skb_copy_datagram_msg include/linux/skbuff.h:3773 [inline]
 __unix_dgram_recvmsg+0x695/0xd50 net/unix/af_unix.c:2354
 ____sys_recvmsg+0x2ca/0x5b0 net/socket.c:-1
 ___sys_recvmsg+0x213/0x5c0 net/socket.c:2707
 do_recvmmsg+0x360/0x7f0 net/socket.c:2801
 __sys_recvmmsg net/socket.c:2880 [inline]
 __do_sys_recvmmsg net/socket.c:2903 [inline]
 __se_sys_recvmmsg net/socket.c:2896 [inline]
 __x64_sys_recvmmsg+0x195/0x250 net/socket.c:2896
 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: 0033:0x7f8436249019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8434480028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f84364d1090 RCX: 00007f8436249019
RDX: 0000000004000087 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f84362e000c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f84364d1128 R14: 00007f84364d1090 R15: 00007fff43f05178
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f 85 73 05 00 00    	jne    0x579
   6:	49 89 ed             	mov    %rbp,%r13
   9:	4c 89 64 24 30       	mov    %r12,0x30(%rsp)
   e:	45 8b 34 24          	mov    (%r12),%r14d
  12:	4e 8d 64 33 02       	lea    0x2(%rbx,%r14,1),%r12
  17:	4c 89 e0             	mov    %r12,%rax
  1a:	48 c1 e8 03          	shr    $0x3,%rax
  1e:	0f b6 04 10          	movzbl (%rax,%rdx,1),%eax
  22:	84 c0                	test   %al,%al
  24:	0f 85 77 05 00 00    	jne    0x5a1
* 2a:	4c 01 f3             	add    %r14,%rbx <-- trapping instruction
  2d:	41 0f b6 2c 24       	movzbl (%r12),%ebp
  32:	31 ff                	xor    %edi,%edi
  34:	89 ee                	mov    %ebp,%esi
  36:	e8 03 bf 95 f9       	call   0xf995bf3e
  3b:	85 ed                	test   %ebp,%ebp
  3d:	0f                   	.byte 0xf
  3e:	84                   	.byte 0x84
  3f:	85                   	.byte 0x85