From: Kairui Song kasong@tencent.com
If zram_meta_alloc failed early, it frees allocated zram->table without setting it NULL. Which will potentially cause zram_meta_free to access the table if user reset an failed and uninitialized device.
Fixes: 74363ec674cb ("zram: fix uninitialized ZRAM not releasing backing device") Cc: stable@vger.kernel.org Signed-off-by: Kairui Song kasong@tencent.com --- drivers/block/zram/zram_drv.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 5b8e4f4171ab..70ecaee25c20 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -1465,6 +1465,7 @@ static bool zram_meta_alloc(struct zram *zram, u64 disksize) zram->mem_pool = zs_create_pool(zram->disk->disk_name); if (!zram->mem_pool) { vfree(zram->table); + zram->table = NULL; return false; }