ACK: [SRU][Q][PATCH 0/1] CVE-2026-53049

[Tim Whisonant]

On Fri, Jul 17, 2026 at 02:03:40AM +0300, Cengiz Can via kernel-team wrote:
> https://ubuntu.com/security/CVE-2026-53049
> 
> [ Impact ]
> 
> In gfs2, the log daemon function gfs2_logd() calls the log flushing functions
> gfs2_ail1_start(), gfs2_ail1_wait(), and gfs2_ail1_empty() without holding
> sdp->sd_log_flush_lock. These functions require exclusion against concurrent
> transactions, so calling them without the lock can lead to race conditions and
> filesystem corruption. This missing locking can result in data integrity issues
> on gfs2 filesystems.
> 
> [ Fix ]
> 
> questing: clean cherry-pick
> 
> [ Test Plan ]
> 
> Boot tested.
> 
> [ Where Problems Could Occur ]
> 
> A regression in this fix could introduce lock contention or deadlocks in the
> gfs2 logging path, potentially affecting the performance or stability of gfs2
> filesystems under heavy transaction load.
> 

Acked-by: Tim Whisonant <tim.whisonant at canonical.com>