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Bug 2149625 - usbguard tries to access non-existent device path
Summary: usbguard tries to access non-existent device path
Keywords:
Status: CLOSED MIGRATED
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: usbguard
Version: 9.1
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Attila Lakatos
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-11-30 12:42 UTC by Dalibor Pospíšil
Modified: 2023-08-03 12:48 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of:
Environment:
Last Closed: 2023-08-03 12:48:49 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker   RHEL-941 0 None Migrated None 2023-08-03 12:48:48 UTC
Red Hat Issue Tracker RHELPLAN-140885 0 None None None 2022-11-30 12:57:48 UTC
Red Hat Issue Tracker SECENGSP-4905 0 None None None 2022-11-30 12:57:51 UTC

Description Dalibor Pospíšil 2022-11-30 12:42:00 UTC 
Description of problem:
Usbguard tries to access non-existent device path during the system boot.

Version-Release number of selected component (if applicable):
usbguard-1.0.0-12.el9.x86_64
usbguard-1.0.0-8.el8_7.2.x86_64

How reproducible:
100% at least in the libvirt VM

Steps to Reproduce:
1. systemctl enable usbguard
2. reboot
3. journalctl -u usbguard

Actual results:
Nov 30 13:17:03 sopos-rhel9-brq systemd[1]: Starting USBGuard daemon...
Nov 30 13:17:04 sopos-rhel9-brq systemd[1]: Started USBGuard daemon.
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: uid=0 pid=740 result='SUCCESS' device.rule='allow id 1d6b:0002 serial "0000:02:00.0" name "xHCI Host Controller" hash "4+i1fOQzh6/Cdbdfiwr>
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: uid=0 pid=740 result='SUCCESS' device.system_name='/devices/pci0000:00/0000:00:02.1/0000:02:00.0/usb1' target.new='allow' device.rule='all>
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: uid=0 pid=740 result='SUCCESS' device.rule='allow id 1d6b:0003 serial "0000:02:00.0" name "xHCI Host Controller" hash "kMlilF7kSjfNYbDD2q8>
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: uid=0 pid=740 result='SUCCESS' device.system_name='/devices/pci0000:00/0000:00:02.1/0000:02:00.0/usb2' target.new='allow' device.rule='all>
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: uid=0 pid=740 result='SUCCESS' device.rule='allow id 0627:0001 serial "28754-0000:00:02.1:00.0-1" name "QEMU USB Tablet" hash "9f6ZIqpK5OG>
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: uid=0 pid=740 result='SUCCESS' device.system_name='/devices/pci0000:00/0000:00:02.1/0000:02:00.0/usb1/1-1' target.new='block' device.rule=>
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: Cannot resolve realpath for /sys/bus/usb/devices/../../../devices/pci0000:00/0000:00:02.1/0000:02:00.0/usb1/1-1/1-1:1.0
Nov 30 13:17:04 sopos-rhel9-brq usbguard-daemon[745]: Ignoring unknown UEvent action: sysfs_devpath=/devices/pci0000:00/0000:00:02.1/0000:02:00.0/usb1/1-1 action=change

Expected results:
no attempt to access non-existent path logged

Additional info:
the last path component does not exist
[root@sopos-rhel9-brq ~]# ls -l /sys/devices/pci0000:00/0000:00:02.1/0000:02:00.0/usb1/1-1/
total 0
-rw-r--r--. 1 root root  4096 Nov 30 13:17 authorized
-rw-r--r--. 1 root root  4096 Nov 30 13:27 avoid_reset_quirk
-r--r--r--. 1 root root  4096 Nov 30 13:16 bcdDevice
-rw-r--r--. 1 root root  4096 Nov 30 13:27 bConfigurationValue
-r--r--r--. 1 root root  4096 Nov 30 13:16 bDeviceClass
-r--r--r--. 1 root root  4096 Nov 30 13:27 bDeviceProtocol
-r--r--r--. 1 root root  4096 Nov 30 13:27 bDeviceSubClass
-r--r--r--. 1 root root  4096 Nov 30 13:27 bmAttributes
-r--r--r--. 1 root root  4096 Nov 30 13:27 bMaxPacketSize0
-r--r--r--. 1 root root  4096 Nov 30 13:27 bMaxPower
-r--r--r--. 1 root root  4096 Nov 30 13:27 bNumConfigurations
-r--r--r--. 1 root root  4096 Nov 30 13:27 bNumInterfaces
-r--r--r--. 1 root root  4096 Nov 30 13:27 busnum
-r--r--r--. 1 root root  4096 Nov 30 13:27 configuration
-r--r--r--. 1 root root 65553 Nov 30 13:16 descriptors
-r--r--r--. 1 root root  4096 Nov 30 13:27 dev
-r--r--r--. 1 root root  4096 Nov 30 13:27 devnum
-r--r--r--. 1 root root  4096 Nov 30 13:27 devpath
lrwxrwxrwx. 1 root root     0 Nov 30 13:16 driver -> ../../../../../../bus/usb/drivers/usb
drwxr-xr-x. 3 root root     0 Nov 30 13:25 ep_00
-r--r--r--. 1 root root  4096 Nov 30 13:16 idProduct
-r--r--r--. 1 root root  4096 Nov 30 13:16 idVendor
-r--r--r--. 1 root root  4096 Nov 30 13:27 ltm_capable
-r--r--r--. 1 root root  4096 Nov 30 13:16 manufacturer
-r--r--r--. 1 root root  4096 Nov 30 13:27 maxchild
lrwxrwxrwx. 1 root root     0 Nov 30 13:17 port -> ../1-0:1.0/usb1-port1
drwxr-xr-x. 2 root root     0 Nov 30 13:16 power
-r--r--r--. 1 root root  4096 Nov 30 13:16 product
-r--r--r--. 1 root root  4096 Nov 30 13:27 quirks
-r--r--r--. 1 root root  4096 Nov 30 13:27 removable
--w-------. 1 root root  4096 Nov 30 13:27 remove
-r--r--r--. 1 root root  4096 Nov 30 13:27 rx_lanes
-r--r--r--. 1 root root  4096 Nov 30 13:16 serial
-r--r--r--. 1 root root  4096 Nov 30 13:27 speed
lrwxrwxrwx. 1 root root     0 Nov 30 13:16 subsystem -> ../../../../../../bus/usb
-r--r--r--. 1 root root  4096 Nov 30 13:27 tx_lanes
-rw-r--r--. 1 root root  4096 Nov 30 13:16 uevent
-r--r--r--. 1 root root  4096 Nov 30 13:27 urbnum
-r--r--r--. 1 root root  4096 Nov 30 13:27 version
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