[PATCH v9 17/19] zram: do not leak page on recompress_store error path

[Sergey Senozhatsky]

Ensure the page used for local object data is freed
on error out path.

Fixes: 3f909a60cec1 ("zram: rework recompress target selection strategy")
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
 drivers/block/zram/zram_drv.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 1e2ba3590a39..e8375fcdb36e 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -2013,7 +2013,7 @@ static ssize_t recompress_store(struct device *dev,
 	struct zram_pp_slot *pps;
 	u32 mode = 0, threshold = 0;
 	u32 prio, prio_max;
-	struct page *page;
+	struct page *page = NULL;
 	ssize_t ret;
 
 	prio = ZRAM_SECONDARY_COMP;
@@ -2157,9 +2157,9 @@ static ssize_t recompress_store(struct device *dev,
 		cond_resched();
 	}
 
-	__free_page(page);
-
 release_init_lock:
+	if (page)
+		__free_page(page);
 	release_pp_ctl(zram, ctl);
 	atomic_set(&zram->pp_in_progress, 0);
 	up_read(&zram->init_lock);
-- 
2.48.1.658.g4767266eb4-goog