WARNING in drm_property_add_enum

Status: upstream: reported C repro on 2026/08/23 01:06
Reported-by: syzbot+a3ed58b8135877288779@syzkaller.appspotmail.com
First crash: 5d09h, last: 5d09h
Bug presence (1)
Date Name Commit Repro Result
2026/08/26 upstream (ToT) 502d45774af0 C Failed due to an error; will retry later
Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in drm_property_add_enum dri -1 syz, C error 155 11h18m 12d 2/29 upstream: reported C repro on 2026/08/16 06:30

Sample crash report:
usb 1-1: config 1 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 2
usb 1-1: New USB device found, idVendor=1d50, idProduct=614d, bcdDevice= 1.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1107 at drivers/gpu/drm/drm_property.c:396 drm_property_add_enum+0x33a/0x3c0 drivers/gpu/drm/drm_property.c:396
Modules linked in:
CPU: 0 PID: 1107 Comm: kworker/0:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:drm_property_add_enum+0x33a/0x3c0 drivers/gpu/drm/drm_property.c:396
Code: 07 e8 8a 03 06 fd 31 c0 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 74 03 06 fd 0f 0b b8 ea ff ff ff eb e3 e8 66 03 06 fd <0f> 0b b8 ea ff ff ff eb d5 e8 58 03 06 fd 0f 0b b8 ea ff ff ff eb
RSP: 0018:ffffc90004ce6bf8 EFLAGS: 00010293
RAX: ffffffff8472fa2a RBX: ffff888023b1bc60 RCX: ffff888021995940
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000000001f
RBP: ffff88801b5c4100 R08: 000000000000001f R09: ffffffff810047ff
R10: 0000000000000002 R11: 00000000d667f721 R12: 0000000000000006
R13: ffff88801b5c4100 R14: 0000000000000006 R15: 0000000000000080
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005598facbf330 CR3: 0000000020da5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drm_mode_create_tv_properties+0x1d2/0x3f0 drivers/gpu/drm/drm_connector.c:1565
 gud_connector_add_tv_mode drivers/gpu/drm/gud/gud_connector.c:402 [inline]
 gud_connector_add_properties drivers/gpu/drm/gud/gud_connector.c:525 [inline]
 gud_connector_create drivers/gpu/drm/gud/gud_connector.c:677 [inline]
 gud_get_connectors+0xd12/0x1460 drivers/gpu/drm/gud/gud_connector.c:721
 gud_probe+0x10d8/0x16a0 drivers/gpu/drm/gud/gud_drv.c:604
 usb_probe_interface+0x5be/0xae0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x276/0xc70 drivers/base/dd.c:595
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2a7/0x480 drivers/base/dd.c:999
 bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
 device_add+0xbcf/0x1050 drivers/base/core.c:3427
 usb_set_configuration+0x19d5/0x2030 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x89/0x150 drivers/usb/core/generic.c:238
 usb_probe_device+0x126/0x250 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x276/0xc70 drivers/base/dd.c:595
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:775
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:805
 __device_attach_driver+0x2b0/0x500 drivers/base/dd.c:927
 bus_for_each_drv+0x184/0x210 drivers/base/bus.c:429
 __device_attach+0x2a7/0x480 drivers/base/dd.c:999
 bus_probe_device+0xba/0x1d0 drivers/base/bus.c:489
 device_add+0xbcf/0x1050 drivers/base/core.c:3427
 usb_new_device+0x9f6/0x15d0 drivers/usb/core/hub.c:2632
 hub_port_connect drivers/usb/core/hub.c:5497 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5637 [inline]
 port_event drivers/usb/core/hub.c:5799 [inline]
 hub_event+0x2b8d/0x5260 drivers/usb/core/hub.c:5881
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/23 01:06 linux-5.15.y 0eb903b5b519 1e72964b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in drm_property_add_enum
* Struck through repros no longer work on HEAD.