It appears that Linus applied a fix for this directly in a merge commit: https://github.com/torvalds/linux/commits/fc02cb2b37fe2cbf1d3334b9f0f0eab9431766c4
When the change with this bug was backported to stable, the fix was squashed. But we appear to have cherry-picked the version from mainline instead of the one from stable which had the bug.
It appears that Linus applied a fix for this directly in a merge commit: /github. com/torvalds/ linux/commits/ fc02cb2b37fe2cb f1d3334b9f0f0ea b9431766c4
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When the change with this bug was backported to stable, the fix was squashed. But we appear to have cherry-picked the version from mainline instead of the one from stable which had the bug.