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KMSAN: uninit-value in get_temp_cnct

Status: upstream: reported on 2025/06/19 04:31
Subsystems: hwmon
[Documentation on labels]
Reported-by: syzbot+3bbbade4e1a7ab45ca3b@syzkaller.appspotmail.com
First crash: 5d07h, last: 5d07h
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH] hwmon: fill it with 0 when data size is insufficient 2 (2) 2025/06/19 16:54
[PATCH] hwmon: (corsair-cpro) Validate the size of the received input buffer 2 (2) 2025/06/19 16:51
[syzbot] [hwmon?] KMSAN: uninit-value in get_temp_cnct 3 (4) 2025/06/19 13:01

Sample crash report:
usb 7-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 7-1: config 0 descriptor??
corsair-cpro 0003:1B1C:0C10.0017: hidraw0: USB HID v4.06 Device [HID 1b1c:0c10] on usb-dummy_hcd.6-1/input0
=====================================================
BUG: KMSAN: uninit-value in get_temp_cnct+0x1f3/0x3b0 drivers/hwmon/corsair-cpro.c:497
 get_temp_cnct+0x1f3/0x3b0 drivers/hwmon/corsair-cpro.c:497
 ccp_probe+0x458/0x790 drivers/hwmon/corsair-cpro.c:622
 __hid_device_probe drivers/hid/hid-core.c:2724 [inline]
 hid_device_probe+0x539/0xab0 drivers/hid/hid-core.c:2761
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 hid_add_device+0x5ed/0x7b0 drivers/hid/hid-core.c:2907
 usbhid_probe+0x1fec/0x2660 drivers/hid/usbhid/hid-core.c:1435
 usb_probe_interface+0xd04/0x1310 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 usb_set_configuration+0x3493/0x3b70 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xfc/0x290 drivers/usb/core/generic.c:250
 usb_probe_device+0x38a/0x690 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 usb_new_device+0x104b/0x20c0 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5535 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5675 [inline]
 port_event drivers/usb/core/hub.c:5835 [inline]
 hub_event+0x5588/0x7580 drivers/usb/core/hub.c:5917
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3321
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3402
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x1e0/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was stored to memory at:
 get_temp_cnct+0x1ec/0x3b0 drivers/hwmon/corsair-cpro.c:496
 ccp_probe+0x458/0x790 drivers/hwmon/corsair-cpro.c:622
 __hid_device_probe drivers/hid/hid-core.c:2724 [inline]
 hid_device_probe+0x539/0xab0 drivers/hid/hid-core.c:2761
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 hid_add_device+0x5ed/0x7b0 drivers/hid/hid-core.c:2907
 usbhid_probe+0x1fec/0x2660 drivers/hid/usbhid/hid-core.c:1435
 usb_probe_interface+0xd04/0x1310 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 usb_set_configuration+0x3493/0x3b70 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xfc/0x290 drivers/usb/core/generic.c:250
 usb_probe_device+0x38a/0x690 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 usb_new_device+0x104b/0x20c0 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5535 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5675 [inline]
 port_event drivers/usb/core/hub.c:5835 [inline]
 hub_event+0x5588/0x7580 drivers/usb/core/hub.c:5917
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3321
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3402
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x1e0/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4154 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 __do_kmalloc_node mm/slub.c:4327 [inline]
 __kmalloc_node_track_caller_noprof+0x96d/0x12f0 mm/slub.c:4347
 alloc_dr drivers/base/devres.c:119 [inline]
 devm_kmalloc+0xd7/0x2f0 drivers/base/devres.c:864
 ccp_probe+0x114/0x790 drivers/hwmon/corsair-cpro.c:596
 __hid_device_probe drivers/hid/hid-core.c:2724 [inline]
 hid_device_probe+0x539/0xab0 drivers/hid/hid-core.c:2761
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 hid_add_device+0x5ed/0x7b0 drivers/hid/hid-core.c:2907
 usbhid_probe+0x1fec/0x2660 drivers/hid/usbhid/hid-core.c:1435
 usb_probe_interface+0xd04/0x1310 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 usb_set_configuration+0x3493/0x3b70 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0xfc/0x290 drivers/usb/core/generic.c:250
 usb_probe_device+0x38a/0x690 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x4d4/0xd90 drivers/base/dd.c:657
 __driver_probe_device+0x268/0x380 drivers/base/dd.c:799
 driver_probe_device+0x70/0x8b0 drivers/base/dd.c:829
 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:957
 bus_for_each_drv+0x3e0/0x680 drivers/base/bus.c:462
 __device_attach+0x3c8/0x5c0 drivers/base/dd.c:1029
 device_initial_probe+0x33/0x40 drivers/base/dd.c:1078
 bus_probe_device+0x3ba/0x5e0 drivers/base/bus.c:537
 device_add+0x12a9/0x1c10 drivers/base/core.c:3692
 usb_new_device+0x104b/0x20c0 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5535 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5675 [inline]
 port_event drivers/usb/core/hub.c:5835 [inline]
 hub_event+0x5588/0x7580 drivers/usb/core/hub.c:5917
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xb91/0x1d80 kernel/workqueue.c:3321
 worker_thread+0xedf/0x1590 kernel/workqueue.c:3402
 kthread+0xd5c/0xf00 kernel/kthread.c:464
 ret_from_fork+0x1e0/0x310 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

CPU: 0 UID: 0 PID: 5855 Comm: kworker/0:3 Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #0 PREEMPT(undef) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
=====================================================

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/15 04:29 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in get_temp_cnct
2025/06/15 04:29 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in get_temp_cnct
2025/06/15 04:21 upstream 4774cfe3543a 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kmsan-gce-386-root KMSAN: uninit-value in get_temp_cnct
* Struck through repros no longer work on HEAD.