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

[Alice C. Munduruca]

On Thu Jul 16, 2026 at 7:03 PM EDT, 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: Alice C. Munduruca <alice.munduruca at canonical.com>