Public bug reported:

BugLink: https://bugs.launchpad.net/bugs/2127706

[Impact]

In the cifs.ko module included in linux-azure kernels, there is a
potential bug with the server interface selection logic during
multichannel mounts, which could cause clients to not be able to find
new candidates for other channels after all interfaces are fulfilled.
This negatively impacts users of the SMB multichannel functionality.

[Fix]

Backport the following fix:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb?id=9d5eff7821f6d70f7d1b4d8a60680fba4de868a7

into the P/N:azure trees.

[Test plan]

Build tested only; Microsoft will validate the bug fix.

[Where problems could occur]

Issues with this patch could degrade the operation of SMB mounts on
Azure.

[Other info]
SF #00413632

** Affects: linux-azure (Ubuntu)
     Importance: High
     Assignee: Vinicius Peixoto (vpeixoto)
         Status: In Progress

** Affects: linux-azure (Ubuntu Noble)
     Importance: High
     Assignee: Vinicius Peixoto (vpeixoto)
         Status: In Progress

** Affects: linux-azure (Ubuntu Plucky)
     Importance: High
     Assignee: Vinicius Peixoto (vpeixoto)
         Status: In Progress

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

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

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

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

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

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

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

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

** Changed in: linux-azure (Ubuntu)
     Assignee: (unassigned) => Vinicius Peixoto (vpeixoto)

** Changed in: linux-azure (Ubuntu Noble)
     Assignee: (unassigned) => Vinicius Peixoto (vpeixoto)

** Changed in: linux-azure (Ubuntu Plucky)
     Assignee: (unassigned) => Vinicius Peixoto (vpeixoto)

** Description changed:

- BugLink: https://bugs.launchpad.net/bugs/FIXME
+ BugLink: https://bugs.launchpad.net/bugs/2127706
  
  [Impact]
  
  In the cifs.ko module included in linux-azure kernels, there is a
  potential bug with the server interface selection logic during
  multichannel mounts, which could cause clients to not be able to find
  new candidates for other channels after all interfaces are fulfilled.
  This negatively impacts users of the SMB multichannel functionality.
  
  [Fix]
  
  Backport the following fix:
  
  
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb?id=9d5eff7821f6d70f7d1b4d8a60680fba4de868a7
  
  into the P/N:azure trees.
  
  [Test plan]
  
  Build tested only; Microsoft will validate the bug fix.
  
  [Where problems could occur]
  
  Issues with this patch could degrade the operation of SMB mounts on
  Azure.
  
  [Other info]
  SF #00413632

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https://bugs.launchpad.net/bugs/2127706

Title:
  azure: backport "cifs: reset iface weights when we cannot find a
  candidate"

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