Re: + zram-fix-uninitialized-zram-not-releasing-backing-device.patch added to mm-hotfixes-unstable branch

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On (24/12/09 17:57), Andrew Morton wrote:
> Setting backing device is done before ZRAM initialization.  If we set the
> backing device, then remove the ZRAM module without initializing the
> device, the backing device reference will be leaked and the device will be
> hold forever.
> 
> Fix this by always reset the ZRAM fully on rmmod or reset store.
> 
> Link: https://lkml.kernel.org/r/20241209165717.94215-3-ryncsn@xxxxxxxxx
> Fixes: 013bf95a83ec ("zram: add interface to specif backing device")
> Signed-off-by: Kairui Song <kasong@xxxxxxxxxxx>
> Reported-by: Desheng Wu <deshengwu@xxxxxxxxxxx>
> Suggested-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
> Cc: <stable@xxxxxxxxxxxxxxx>
> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>


Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>


A side note:
I'm not sure if this and zram-refuse-to-use-zero-sized-block-device-as-backing-device.patch
are worth the stable tag, they don't really fix problems that people run
into en masse.




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