[drm:udl_get_edid_block] *ERROR* Read EDID byte 0 failed err ffffffb9 udl 2-1:9.24: [drm] Cannot find any crtc or sizes usb 2-1: USB disconnect, device number 66 general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: usb_hub_wq hub_event RIP: 0010:drm_client_buffer_vunmap+0x26/0x50 drivers/gpu/drm/drm_client.c:347 Code: 00 00 66 90 53 48 89 fb 48 83 ec 08 e8 83 49 e8 fe 48 8d 7b 10 48 b8 00 00 00 00 00 fc ff df 48 8d 73 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0e 48 8b 7b 10 48 83 c4 08 5b e9 26 43 f7 ff 48 89 RSP: 0018:ffffc9000005f700 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010042000 RDX: 0000000000000002 RSI: 0000000000000018 RDI: 0000000000000010 RBP: ffff88810e1cc0c8 R08: 0000000000000000 R09: ffff88810e1cc217 R10: ffffed1021c39842 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88810e1cc0d8 R14: ffff88810e1cc010 R15: dead000000000100 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4bd8a3f130 CR3: 000000012bc64000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: drm_fbdev_cleanup+0x380/0x440 drivers/gpu/drm/drm_fb_helper.c:2052 drm_fbdev_release drivers/gpu/drm/drm_fb_helper.c:2059 [inline] drm_fbdev_client_unregister+0x61/0x80 drivers/gpu/drm/drm_fb_helper.c:2386 drm_client_dev_unregister+0x239/0x3b0 drivers/gpu/drm/drm_client.c:175 drm_dev_unregister+0xe9/0x2b0 drivers/gpu/drm/drm_drv.c:936 drm_dev_unplug+0x4e/0xc0 drivers/gpu/drm/drm_drv.c:471 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1156 device_release_driver_internal drivers/base/dd.c:1187 [inline] device_release_driver+0x26/0x40 drivers/base/dd.c:1210 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533 device_del+0x502/0xd40 drivers/base/core.c:3294 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1413 usb_disconnect.cold+0x27d/0x791 drivers/usb/core/hub.c:2218 hub_port_connect drivers/usb/core/hub.c:5074 [inline] hub_port_connect_change drivers/usb/core/hub.c:5363 [inline] port_event drivers/usb/core/hub.c:5509 [inline] hub_event+0x1c9c/0x4320 drivers/usb/core/hub.c:5591 process_one_work+0x98d/0x1580 kernel/workqueue.c:2275 process_scheduled_works kernel/workqueue.c:2337 [inline] worker_thread+0x82b/0x1120 kernel/workqueue.c:2423 kthread+0x38c/0x460 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Modules linked in: ---[ end trace cb5a6666410d5ebf ]--- RIP: 0010:drm_client_buffer_vunmap+0x26/0x50 drivers/gpu/drm/drm_client.c:347 Code: 00 00 66 90 53 48 89 fb 48 83 ec 08 e8 83 49 e8 fe 48 8d 7b 10 48 b8 00 00 00 00 00 fc ff df 48 8d 73 18 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 0e 48 8b 7b 10 48 83 c4 08 5b e9 26 43 f7 ff 48 89 RSP: 0018:ffffc9000005f700 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90010042000 RDX: 0000000000000002 RSI: 0000000000000018 RDI: 0000000000000010 RBP: ffff88810e1cc0c8 R08: 0000000000000000 R09: ffff88810e1cc217 R10: ffffed1021c39842 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88810e1cc0d8 R14: ffff88810e1cc010 R15: dead000000000100 FS: 0000000000000000(0000) GS:ffff8881f6800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4bd8a3f130 CR3: 000000012bc64000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400