------------[ cut here ]------------
[PLANE:35:plane-0] pixel format with alpha exposed but blend mode not setup
WARNING: drivers/gpu/drm/drm_mode_config.c:873 at validate_blend_mode_for_alpha_formats drivers/gpu/drm/drm_mode_config.c:872 [inline], CPU#0: kworker/0:2/1557
WARNING: drivers/gpu/drm/drm_mode_config.c:873 at drm_mode_config_validate+0x1c6a/0x1e60 drivers/gpu/drm/drm_mode_config.c:938, CPU#0: kworker/0:2/1557
Modules linked in:
CPU: 0 UID: 0 PID: 1557 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:validate_blend_mode_for_alpha_formats drivers/gpu/drm/drm_mode_config.c:872 [inline]
RIP: 0010:drm_mode_config_validate+0x1cab/0x1e60 drivers/gpu/drm/drm_mode_config.c:938
Code: 0f 85 ae 00 00 00 4d 8d 77 10 8b 6d 00 4c 89 f0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 f7 e8 6d 16 a3 fc 49 8b 16 4c 89 ef 89 ee <67> 48 0f b9 3a eb 05 e8 b9 63 33 fc 49 bd 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90005b6eb70 EFLAGS: 00010246
RAX: 1ffff1100f4da9b0 RBX: dffffc0000000000 RCX: ffff8880298b3e80
RDX: ffff8880222b53e0 RSI: 0000000000000023 RDI: ffffffff9085d490
RBP: 0000000000000023 R08: ffff8880706439b3 R09: 1ffff1100e0c8736
R10: dffffc0000000000 R11: ffffed100e0c8737 R12: dffffc0000000000
R13: ffffffff9085d490 R14: ffff88807a6d4d80 R15: ffff88807a6d4d70
FS:  0000000000000000(0000) GS:ffff888124ce6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff71aac1fe0 CR3: 000000006fab0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 drm_dev_register+0x7c/0xd80 drivers/gpu/drm/drm_drv.c:1077
 gud_probe+0x116f/0x13b0 drivers/gpu/drm/gud/gud_drv.c:646
 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3776
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c4/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12a/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3776
 usb_new_device+0x9aa/0x1690 drivers/usb/core/hub.c:2708
 hub_port_connect drivers/usb/core/hub.c:5580 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5720 [inline]
 port_event drivers/usb/core/hub.c:5884 [inline]
 hub_event+0x28e8/0x4d30 drivers/usb/core/hub.c:5966
 process_one_work kernel/workqueue.c:3387 [inline]
 process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3470
 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3551
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess):
   0:	0f 85 ae 00 00 00    	jne    0xb4
   6:	4d 8d 77 10          	lea    0x10(%r15),%r14
   a:	8b 6d 00             	mov    0x0(%rbp),%ebp
   d:	4c 89 f0             	mov    %r14,%rax
  10:	48 c1 e8 03          	shr    $0x3,%rax
  14:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  18:	74 08                	je     0x22
  1a:	4c 89 f7             	mov    %r14,%rdi
  1d:	e8 6d 16 a3 fc       	call   0xfca3168f
  22:	49 8b 16             	mov    (%r14),%rdx
  25:	4c 89 ef             	mov    %r13,%rdi
  28:	89 ee                	mov    %ebp,%esi
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	eb 05                	jmp    0x36
  31:	e8 b9 63 33 fc       	call   0xfc3363ef
  36:	49 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%r13
  3d:	fc ff df