Public bug reported:

SRU Justification

[Impact]

Microsoft is asking to have 3 CIFS patches backported to focal/linux-
azure.

506c1da44fee32ba1d3a70413289ad58c772bba6 ("cifs: use the expiry output of 
dns_query to schedule next resolution")
4ac0536f8874a903a72bddc57eb88db774261e3a ("cifs: set a minimum of 120s for next 
dns resolution")
7be3248f313930ff3d3436d4e9ddbe9fccc1f541 ("cifs: To match file servers, make 
sure the server hostname matches")

This is a second attempt because the first backport attempt caused a
regression. This set has been thoroughly tested by Microsoft, especially
for the case that was causing the regression (DFS enabled shares).

[Where things could go wrong]

Share connection attempts could fail. DFS shares could cause kernel
panics.

[Other Info]

SF: #00324495

** Affects: linux-azure (Ubuntu)
     Importance: Medium
         Status: Fix Released

** Affects: linux-azure (Ubuntu Focal)
     Importance: Medium
     Assignee: Tim Gardner (timg-tpi)
         Status: In Progress

** Package changed: linux (Ubuntu) => linux-azure (Ubuntu)

** Changed in: linux-azure (Ubuntu)
   Importance: Undecided => Medium

** Changed in: linux-azure (Ubuntu)
       Status: New => In Progress

** Also affects: linux-azure (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: linux-azure (Ubuntu)
       Status: In Progress => Fix Released

** Changed in: linux-azure (Ubuntu Focal)
   Importance: Undecided => Medium

** Changed in: linux-azure (Ubuntu Focal)
       Status: New => In Progress

** Changed in: linux-azure (Ubuntu Focal)
     Assignee: (unassigned) => Tim Gardner (timg-tpi)

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https://bugs.launchpad.net/bugs/1960549

Title:
  Azure: CIFS backport request

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