------------[ cut here ]------------
usb_ep_enable: ep134 (ep6in-bulk) has maxpacket 0
WARNING: CPU: 1 PID: 4673 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: 4673 Comm: syz.1.119 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
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:ffffc90000dd0688 EFLAGS: 00010046
RAX: 4812cf15c7696200 RBX: ffff8880210ac248 RCX: ffff888028465940
RDX: 0000000000000100 RSI: 0000000000000102 RDI: 0000000000000000
RBP: 0000000000000086 R08: ffff8880b912795b R09: 1ffff11017224f2b
R10: dffffc0000000000 R11: ffffed1017224f2c R12: dffffc0000000000
R13: ffff8880210ac275 R14: ffff8880210ac250 R15: ffff88801f52bfba
FS: 0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c36dc41 CR3: 00000000601fe000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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:stack_not_used include/linux/sched/task_stack.h:107 [inline]
RIP: 0010:check_stack_usage kernel/exit.c:766 [inline]
RIP: 0010:do_exit+0x171c/0x2110 kernel/exit.c:925
Code: 00 74 08 48 89 df e8 43 9a 75 00 4c 8b 33 bb 08 00 00 00 49 8d 3c 1e 48 89 f8 48 c1 e8 03 42 80 3c 20 00 74 05 e8 24 9a 75 00 <49> 83 3c 1e 00 75 0b e8 58 66 30 00 48 83 c3 08 eb d7 44 8b 35 6b
RSP: 0018:ffffc9000325fd80 EFLAGS: 00000246
RAX: 1ffff9200064b44d RBX: 0000000000002268 RCX: ffff888028465940
RDX: 0000000000000000 RSI: 0000000043736564 RDI: ffffc9000325a268
RBP: ffffc9000325feb8 R08: ffff8880624d1c8b R09: 1ffff1100c49a391
R10: dffffc0000000000 R11: ffffed100c49a392 R12: dffffc0000000000
R13: 1ffff1100508cbd3 R14: ffffc90003258000 R15: ffff888028465fb8
do_group_exit+0x12c/0x2f0 kernel/exit.c:1004
__do_sys_exit_group kernel/exit.c:1015 [inline]
__se_sys_exit_group kernel/exit.c:1013 [inline]
__x64_sys_exit_group+0x3b/0x40 kernel/exit.c:1013
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: 0033:0x7f64cacfe159
Code: Unable to access opcode bytes at RIP 0x7f64cacfe12f.
RSP: 002b:00007ffd60576e18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64cacfe159
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd60576e7c R08: 0000000000000000 R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000001a
R13: 00000000000927c0 R14: 00000000000163f8 R15: 00007ffd60576ed0
----------------
Code disassembly (best guess):
0: 00 74 08 48 add %dh,0x48(%rax,%rcx,1)
4: 89 df mov %ebx,%edi
6: e8 43 9a 75 00 call 0x759a4e
b: 4c 8b 33 mov (%rbx),%r14
e: bb 08 00 00 00 mov $0x8,%ebx
13: 49 8d 3c 1e lea (%r14,%rbx,1),%rdi
17: 48 89 f8 mov %rdi,%rax
1a: 48 c1 e8 03 shr $0x3,%rax
1e: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
23: 74 05 je 0x2a
25: e8 24 9a 75 00 call 0x759a4e
* 2a: 49 83 3c 1e 00 cmpq $0x0,(%r14,%rbx,1) <-- trapping instruction
2f: 75 0b jne 0x3c
31: e8 58 66 30 00 call 0x30668e
36: 48 83 c3 08 add $0x8,%rbx
3a: eb d7 jmp 0x13
3c: 44 rex.R
3d: 8b .byte 0x8b
3e: 35 .byte 0x35
3f: 6b .byte 0x6b