dummy_hcd dummy_hcd.0: remove, state 4
usb usb1: USB disconnect, device number 1
dummy_hcd dummy_hcd.0: stopped
dummy_hcd dummy_hcd.0: USB bus 1 deregistered
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 5928 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dummy_set_selfpowered+0xbb/0x150 drivers/usb/gadget/udc/dummy_hcd.c:905
Code: 94 c0 4d 8d b4 c6 80 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 1f d3 23 fb 4d 8b 3e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 06 d3 23 fb 41 be 78 12 00 00 4d
RSP: 0018:ffffc900033277e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888050dada00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 0000000000000003 R08: ffff888019e458df R09: 1ffff110033c8b1b
R10: dffffc0000000000 R11: ffffed10033c8b1c R12: dffffc0000000000
R13: ffff88802de90530 R14: ffff8881416b5280 R15: 0000000000000000
FS:  00005555709c1500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25b2e70000 CR3: 00000000770be000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 usb_gadget_set_selfpowered+0x6e/0x230 drivers/usb/gadget/udc/core.c:578
 composite_dev_prepare+0x2fa/0x320 drivers/usb/gadget/composite.c:2464
 configfs_composite_bind+0xa1/0x13f0 drivers/usb/gadget/configfs.c:1699
 gadget_bind_driver+0x2b3/0x770 drivers/usb/gadget/udc/core.c:1651
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x247/0xae0 drivers/base/dd.c:717
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:879
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:909
 __driver_attach+0x444/0x6d0 drivers/base/dd.c:1295
 bus_for_each_dev+0x235/0x2b0 drivers/base/bus.c:370
 bus_add_driver+0x340/0x630 drivers/base/bus.c:723
 driver_register+0x23a/0x310 drivers/base/driver.c:246
 usb_gadget_register_driver_owner+0xf9/0x270 drivers/usb/gadget/udc/core.c:1730
 gadget_dev_desc_UDC_store+0x1c7/0x2e0 drivers/usb/gadget/configfs.c:300
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x312/0x400 fs/configfs/file.c:229
 call_write_iter include/linux/fs.h:2018 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x474/0x9a0 fs/read_write.c:584
 ksys_write+0x151/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f25b2f9e0d9
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:00007ffebbf72278 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f25b3225fa0 RCX: 00007f25b2f9e0d9
RDX: 000000000000000b RSI: 0000200000000680 RDI: 0000000000000004
RBP: 00007f25b3035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f25b3225fac R14: 00007f25b3225fa0 R15: 00007f25b3225fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_set_selfpowered+0xbb/0x150 drivers/usb/gadget/udc/dummy_hcd.c:905
Code: 94 c0 4d 8d b4 c6 80 06 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 1f d3 23 fb 4d 8b 3e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 06 d3 23 fb 41 be 78 12 00 00 4d
RSP: 0018:ffffc900033277e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff888050dada00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 0000000000000003 R08: ffff888019e458df R09: 1ffff110033c8b1b
R10: dffffc0000000000 R11: ffffed10033c8b1c R12: dffffc0000000000
R13: ffff88802de90530 R14: ffff8881416b5280 R15: 0000000000000000
FS:  00005555709c1500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f25b2e70000 CR3: 00000000770be000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	94                   	xchg   %eax,%esp
   1:	c0 4d 8d b4          	rorb   $0xb4,-0x73(%rbp)
   5:	c6 80 06 00 00 4c 89 	movb   $0x89,0x4c000006(%rax)
   c:	f0 48 c1 e8 03       	lock shr $0x3,%rax
  11:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  16:	74 08                	je     0x20
  18:	4c 89 f7             	mov    %r14,%rdi
  1b:	e8 1f d3 23 fb       	call   0xfb23d33f
  20:	4d 8b 3e             	mov    (%r14),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 06 d3 23 fb       	call   0xfb23d33f
  39:	41 be 78 12 00 00    	mov    $0x1278,%r14d
  3f:	4d                   	rex.WRB