EXT4-fs (loop4): unsupported descriptor size 320
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: 1748 Comm: syz.4.363 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:dummy_set_selfpowered+0xbc/0x150 drivers/usb/gadget/udc/dummy_hcd.c:882
Code: 94 c0 4d 8d b4 c6 f0 04 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 0e 64 92 fe 4d 8b 3e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 f5 63 92 fe 41 be 78 11 00 00 4d
RSP: 0018:ffffc90000d179f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000002
RDX: ffff888128e78000 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffffc90000d17a10 R08: ffff88810005906f R09: 1ffff1102000b20d
R10: dffffc0000000000 R11: ffffed102000b20e R12: dffffc0000000000
R13: ffff8881109c8478 R14: ffff88810b7b5180 R15: 0000000000000000
FS:  00007f2d0ddb36c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e80bff8 CR3: 000000011aa60000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 usb_gadget_set_selfpowered+0x6c/0x180 drivers/usb/gadget/udc/core.c:536
 composite_dev_prepare+0x2e7/0x310 drivers/usb/gadget/composite.c:2273
 configfs_composite_bind+0xb4/0x13a0 drivers/usb/gadget/configfs.c:1336
 udc_bind_to_driver+0x24e/0x6d0 drivers/usb/gadget/udc/core.c:1573
 usb_gadget_probe_driver+0x1fc/0x380 drivers/usb/gadget/udc/core.c:1639
 gadget_dev_desc_UDC_store+0x217/0x330 drivers/usb/gadget/configfs.c:321
 flush_write_buffer fs/configfs/file.c:251 [inline]
 configfs_write_file+0x320/0x3d0 fs/configfs/file.c:283
 vfs_write+0x344/0xd70 fs/read_write.c:603
 ksys_write+0x14a/0x260 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f2d0f359e99
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:00007f2d0ddb3028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f2d0f5e1fa0 RCX: 00007f2d0f359e99
RDX: 000000000000000c RSI: 0000200000000400 RDI: 0000000000000007
RBP: 00007f2d0f3efeaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2d0f5e2038 R14: 00007f2d0f5e1fa0 R15: 00007ffcc24c4828
Modules linked in:
---[ end trace 591a688ad2b398b7 ]---
RIP: 0010:dummy_set_selfpowered+0xbc/0x150 drivers/usb/gadget/udc/dummy_hcd.c:882
Code: 94 c0 4d 8d b4 c6 f0 04 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 0e 64 92 fe 4d 8b 3e 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 f5 63 92 fe 41 be 78 11 00 00 4d
RSP: 0018:ffffc90000d179f0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000002
RDX: ffff888128e78000 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffffc90000d17a10 R08: ffff88810005906f R09: 1ffff1102000b20d
R10: dffffc0000000000 R11: ffffed102000b20e R12: dffffc0000000000
R13: ffff8881109c8478 R14: ffff88810b7b5180 R15: 0000000000000000
FS:  00007f2d0ddb36c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe674ccec6b CR3: 000000011aa60000 CR4: 00000000003526a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	4d 8d b4 c6 f0 04 00 	lea    0x4f0(%r14,%rax,8),%r14
   7:	00
   8:	4c 89 f0             	mov    %r14,%rax
   b:	48 c1 e8 03          	shr    $0x3,%rax
   f:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1)
  14:	74 08                	je     0x1e
  16:	4c 89 f7             	mov    %r14,%rdi
  19:	e8 0e 64 92 fe       	call   0xfe92642c
  1e:	4d 8b 3e             	mov    (%r14),%r15
  21:	4c 89 f8             	mov    %r15,%rax
  24:	48 c1 e8 03          	shr    $0x3,%rax
* 28:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2d:	74 08                	je     0x37
  2f:	4c 89 ff             	mov    %r15,%rdi
  32:	e8 f5 63 92 fe       	call   0xfe92642c
  37:	41 be 78 11 00 00    	mov    $0x1178,%r14d
  3d:	4d                   	rex.WRB