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Subject[PATCH 1/2] zram: avoid null access when fail to alloc meta
Date
zram_meta_alloc could be failed so caller should check it.
Otherwise, your system will be hang.

Cc: <stable@vger.kernel.org>
Signed-off-by: Minchan Kim <minchan@kernel.org>
---
drivers/block/zram/zram_drv.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 5ec61be793d2..21aee3edcb25 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -554,6 +554,8 @@ static ssize_t disksize_store(struct device *dev,

disksize = PAGE_ALIGN(disksize);
meta = zram_meta_alloc(disksize);
+ if (!meta)
+ return -ENOMEM;
down_write(&zram->init_lock);
if (init_done(zram)) {
up_write(&zram->init_lock);
--
1.8.5.3


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