On Mon, Sep 09, 2024 at 08:16:48AM +0200, Thomas Gleixner wrote:
>
> From: Roland Xu <mu001999@xxxxxxxxxxx>
>
> commit d33d26036a0274b472299d7dcdaa5fb34329f91b upstream.
>
> rt_mutex_handle_deadlock() is called with rt_mutex::wait_lock held. In the
> good case it returns with the lock held and in the deadlock case it emits a
> warning and goes into an endless scheduling loop with the lock held, which
> triggers the 'scheduling in atomic' warning.
>
> Unlock rt_mutex::wait_lock in the dead lock case before issuing the warning
> and dropping into the schedule for ever loop.
>
> [ tglx: Moved unlock before the WARN(), removed the pointless comment,
> massaged changelog, added Fixes tag ]
>
> Fixes: 3d5c9340d194 ("rtmutex: Handle deadlock detection smarter")
> Signed-off-by: Roland Xu <mu001999@xxxxxxxxxxx>
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Link: https://lore.kernel.org/all/ME0P300MB063599BEF0743B8FA339C2CECC802@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> ---
> Backport to 5.10.y, 5.4.y, 4.19.y
Now queued up, thanks!
greg k-h
