ACK: [SRU][N:linux-azure][PATCH 0/1] azure: backport "cifs: fix pagecache leak when do writepages"

[John Cabaj]

On 9/12/25 2:25 PM, Vinicius Peixoto wrote:
> BugLink: https://bugs.launchpad.net/bugs/2122719
> 
> [Impact]
> 
> A memory leak which was introduced in the smb.ko module by commit f3dc1bdb6b0b ("cifs: Fix writeback data corruption") is causing hangups on VMs due to memory starvation. This introduces a high risk of data corruption for users running the 6.8 Azure kernel.
> 
> [Fix]
> 
> Backport the fix:
> 
> https://lore.kernel.org/linux-cifs/20250912014150.3057545-1-yangerkun@huawei.com/
> 
> to the n:azure tree.
> 
> [Test plan]
> 
> Build tested only; Microsoft will validate the bug fix.
> 
> [Where problems could occur]
> 
> Issues with this patch could cause hangs/lockups during CIFS writeback operations, particularly in systems with a high CPU count.
> 
> [Other info]
> SF #00418307
> 
> Yang Erkun (1):
>    cifs: fix pagecache leak when do writepages
> 
>   fs/smb/client/file.c | 16 +++++++++++++---
>   1 file changed, 13 insertions(+), 3 deletions(-)
> 

Acked-by: John Cabaj <john.cabaj at canonical.com>