HP Z220 (xeon). Fedora 33 GCC 10.2.1
Boot system, connect via KVM (DVI/USB) and disconnect, then:
.
usb 1-1.1.1: USB disconnect, device number 6
usb 1-1.1.1.2: USB disconnect, device number 8
usb 1-1.1.1.4: USB disconnect, device number 9
usb 1-1.1.1.5: clear tt 5 (90d4) error -71
usb 1-1.1.1.5: USB disconnect, device number 11
usb 1-1.1.1.5.4: USB disconnect, device number 12
cp210x ttyUSB0: cp210x converter now disconnected from ttyUSB0
BUG: kernel NULL pointer dereference, address: 0278
#PF: supervisor read access in kernel mode
#PF: error_code(0x) - not-present page
PGD 0 P4D 0
Oops: [#1] SMP NOPTI
CPU: 0 PID: 2899 Comm: kworker/0:0 Not tainted 5.12.0-rc2 #1
Hardware name: Hewlett-Packard HP Z220 CMT Workstation/1790, BIOS K51
v01.87 06/10/2019
Workqueue: usb_hub_wq hub_event
RIP: 0010:gpiodevice_release+0xc/0x70
Code: c0 0f b6 c0 5b c3 85 c0 5b 0f 95 c0 0f b6 c0 c3 0f 0b eb b1 b8 fb
ff ff ff 5b c3 0f 1f 00 55 48 8b 6f 78 48 c7 c7 d0 24 13 b7 <48> 8b 95
78 02 00 00 48 8b 85 80 02 00 00 48 89 42 08 48 89 10 8b
RSP: 0018:b7b600a3bb10 EFLAGS: 00010286
RAX: b6414650 RBX: RCX: 0282
RDX: 8a255a8d6598 RSI: 0282 RDI: b71324d0
RBP: R08: 0001 R09: 0282
R10: 0001 R11: b71646a0 R12: 8a254f51a100
R13: b7145e60 R14: 8a255a811790 R15: 0002
FS: () GS:8a284dc0() knlGS:
CS: 0010 DS: ES: CR0: 80050033
CR2: 0278 CR3: 00012dd6a003 CR4: 001706f0
Call Trace:
device_release+0x2f/0x80
kobject_put+0x63/0xc0
cp210x_disconnect+0x1b/0x30 [cp210x]
usb_serial_disconnect+0xe1/0x130
usb_unbind_interface+0x65/0x1c0
__device_release_driver+0x144/0x1f0
device_release_driver+0x1f/0x30
bus_remove_device+0xcd/0x110
device_del+0x185/0x450
? kobject_put+0x70/0xc0
usb_disable_device+0xac/0x150
usb_disconnect.cold+0x60/0x1a4
usb_disconnect.cold+0x29/0x1a4
usb_disconnect.cold+0x29/0x1a4
hub_event+0x5cf/0x1230
? __switch_to_asm+0x42/0x70
process_one_work+0x1ea/0x340
worker_thread+0x48/0x3c0
? rescuer_thread+0x380/0x380
kthread+0x111/0x130
? __kthread_bind_mask+0x60/0x60
ret_from_fork+0x22/0x30
Modules linked in: rfcomm cmac hid_logitech_hidpp bnep btusb btrtl btbcm
btintel bluetooth ecdh_generic ecc hid_logitech_dj cp210x joydev
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 snd_usb_audio
videobuf2_common snd_usbmidi_lib videodev snd_rawmidi mc iptable_filter
bpfilter sunrpc snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic ledtrig_audio x86_pkg_temp_thermal
intel_powerclamp snd_hda_intel coretemp snd_intel_dspcfg snd_hda_codec
kvm_intel snd_hda_core snd_hwdep snd_seq kvm snd_seq_device irqbypass
at24 snd_pcm rapl hp_wmi snd_timer sparse_keymap iTCO_wdt wmi_bmof
rfkill iTCO_vendor_support snd intel_cstate pcspkr i2c_i801 intel_uncore
i2c_smbus soundcore lpc_ich wmi drm zram ip_tables x_tables
crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel r8169
e1000e fuse
CR2: 0278
---[ end trace a5b6fc6316be72a4 ]---
RIP: 0010:gpiodevice_release+0xc/0x70
Code: c0 0f b6 c0 5b c3 85 c0 5b 0f 95 c0 0f b6 c0 c3 0f 0b eb b1 b8 fb
ff ff ff 5b c3 0f 1f 00 55 48 8b 6f 78 48 c7 c7 d0 24 13 b7 <48> 8b 95
78 02 00 00 48 8b 85 80 02 00 00 48 89 42 08 48 89 10 8b
RSP: 0018:b7b600a3bb10 EFLAGS: 00010286
RAX: b6414650 RBX: RCX: 0282
RDX: 8a255a8d6598 RSI: 0282 RDI: b71324d0
RBP: R08: 0001 R09: 0282
R10: 0001 R11: b71646a0 R12: 8a254f51a100
R13: b7145e60 R14: 8a255a811790 R15: 0002
FS: () GS:8a284dc0() knlGS:
CS: 0010 DS: ES: CR0: 80050033
CR2: 0278 CR3: 00012dd6a003 CR4: 001706f0
Fault is 100% reproducible. Login/logout no longer works. Hard power
cycle required.
No problems with Kernel 5.11.x
