[Bug 1933402] Re: net card set VF and altname display blurred character

[dann frazier]

** Changed in: systemd (Ubuntu Impish)
       Status: New => Fix Released

** Changed in: systemd (Ubuntu Hirsute)
       Status: New => Fix Released

** Changed in: systemd (Ubuntu Groovy)
       Status: New => Fix Released

** Description changed:

+ [Impact]
+ When running with the HWE kernel (5.4 didn't support altnames), altnames containing garbage (uninitialized memory) may get assigned to a NIC. This is 100% reproducible on arm64.
  
- [Bug Description]
- use ubuntu 20.04.2 to net card set VF  and altname display blurred  character
- 
- [Steps to Reproduce]
+ [Test Case]
  1) echo 1 > /sys/class/net/enp189s0f0/device/sriov_numvfs
  2) ip a
  3)
  10: eno1v0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
-     link/ether 1e:d8:e1:e9:ae:25 brd ff:ff:ff:ff:ff:ff
-     altname @▒ު▒
-     altname enp125s0f0v0
+     link/ether 1e:d8:e1:e9:ae:25 brd ff:ff:ff:ff:ff:ff
+     altname @▒ު▒
+     altname enp125s0f0v0
  11: enp189s0f0v0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
-     link/ether 76:ea:f4:65:dd:33 brd ff:ff:ff:ff:ff:ff
-     altname ▒b▒ު▒
-     altname ▒▒▒▒▒▒
+     link/ether 76:ea:f4:65:dd:33 brd ff:ff:ff:ff:ff:ff
+     altname ▒b▒ު▒
+     altname ▒▒▒▒▒▒
  
- [Actual Results]
- altname ▒b▒ު▒
- altname ▒▒▒▒▒▒
+ [Fix]
+ There's a one liner upstream fix that simply initializes a variable:
+ https://github.com/systemd/systemd/commit/61fd7d6720c562c88ab79062ff8d131e5e3c7b1b
  
- [Expected Results]
- ok
- [Reproducibility]
- 100%
- 
- [Additional information]
- (Firmware version, kernel version, affected hardware, etc. if required):
- 
- [Resolution]
+ [What Could Go Wrong]
+ TBD

** Changed in: systemd (Ubuntu Focal)
       Status: New => In Progress

** Changed in: systemd (Ubuntu Focal)
     Assignee: (unassigned) => dann frazier (dannf)

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https://bugs.launchpad.net/bugs/1933402

Title:
  net card set VF  and altname display blurred  character

Status in kunpeng920:
  New
Status in kunpeng920 ubuntu-20.04-hwe series:
  New
Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Focal:
  In Progress
Status in systemd source package in Groovy:
  Fix Released
Status in systemd source package in Hirsute:
  Fix Released
Status in systemd source package in Impish:
  Fix Released

Bug description:
  [Impact]
  When running with the HWE kernel (5.4 didn't support altnames), altnames containing garbage (uninitialized memory) may get assigned to a NIC. This is 100% reproducible on arm64.

  [Test Case]
  1) echo 1 > /sys/class/net/enp189s0f0/device/sriov_numvfs
  2) ip a
  3)
  10: eno1v0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 1e:d8:e1:e9:ae:25 brd ff:ff:ff:ff:ff:ff
      altname @▒ު▒
      altname enp125s0f0v0
  11: enp189s0f0v0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 76:ea:f4:65:dd:33 brd ff:ff:ff:ff:ff:ff
      altname ▒b▒ު▒
      altname ▒▒▒▒▒▒

  [Fix]
  There's a one liner upstream fix that simply initializes a variable:
  https://github.com/systemd/systemd/commit/61fd7d6720c562c88ab79062ff8d131e5e3c7b1b

  [What Could Go Wrong]
  TBD

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