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@gmail.com Fixes: 013bf95a83ec ("zram: add interface to specif backing device") Signed-off-by: Kairui Song kasong@tencent.com Reported-by: Desheng Wu deshengwu@tencent.com Suggested-by: Sergey Senozhatsky senozhatsky@chromium.org Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org
Reviewed-by: Sergey Senozhatsky senozhatsky@chromium.org
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.