APPLIED: [SRU][N:linux-azure][PATCH 0/2] Silent data corruption bug in CIFS module for write operations affecting kernel ~[6.3-6.9]

[John Cabaj]

On 11/19/25 12:04 PM, John Cabaj wrote:
> BugLink: https://bugs.launchpad.net/bugs/2131951
> 
> SRU Justification
> 
> [Impact]
> 
> * Microsoft requested patches to fix CIFS module being affected by a silent data corruption bug affecting customers. Only 6.8 kernels are affected, hence the scope being limited to Noble.
> 
> [Fix]
> 
> * Noble: clean patches from the following upstream LKML submissions (https://lore.kernel.org/linux-cifs/CANT5p=q22P+zXHW2vH-n+W-zRe7ZWNORgh9gvoUOGpV6VMF8Fg@mail.gmail.com/, https://lore.kernel.org/stable/CAH2r5mus4Cp0jH4y=_5LDCiDftVOEZwVaJb1ZOq3Uze2G4Evpg@mail.gmail.com/):
> * "UBUNTU: SAUCE: cifs: stop writeback extension when change of size is detected"
> * "UBUNTU: SAUCE: cifs: Fix uncached read into ITER_KVEC iterator"
> 
> [Test Plan]
> 
> * Compile tested
> * Microsoft tested
> 
> [Regression potential]
> 
> * Changes are localized to CIFS. Possible regressions could result in unexpected behavior of CIFS driver.
> 
> [Other info]
> 
> * SF#00422224
> 
> David Howells (1):
>    UBUNTU: SAUCE: cifs: Fix uncached read into ITER_KVEC iterator
> 
> Shyam Prasad N (1):
>    UBUNTU: SAUCE: cifs: stop writeback extension when change of size is
>      detected
> 
>   fs/smb/client/file.c | 115 ++++++++++++++++++++++++++++++++++++++++---
>   1 file changed, 109 insertions(+), 6 deletions(-)
> 

Applied to Noble linux-azure master-next branch.


Thanks,
j-c