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>The commit got merged in 6.5-rc1 so all stable kernels that have 91562895f803 ("ext4: properly sync file size update after O_SYNC direct IO") before 6.5 are corrupting data - I've noticed at least 6.1 is still carrying the problematic commit. Greg, please take out the commit from all stable kernels before 6.5 as soon as possible, we'll figure out proper backport once user data are not being corrupted anymore. Thanks!

The way I read https://lore.kernel.org/stable/20231205122122.dfhhoaswsfscuh... 6.5+ should be okay. PS: Please correct me if not!

6.1.64+ affected, per reply on thread.

Should be fixed in 6.1.66.

iomap: update ki_pos a little later in iomap_dio_complete

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux...

Is what you've linked the patch that should be backported to affected kernels?

As the potentially problematic patch causing the corruption, I found https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux... but it's not present in the 6.2.2 I run.

I'm very conservative in the versions or critical components like kernels or dkms modules, that didn't protect me against the ZFS bug, but it seems to have avoided me this EXT4 bug!