Messages in this thread Patch in this message | | | From | Minchan Kim <> | Subject | [PATCH 1/2] zram: avoid null access when fail to alloc meta | Date | Tue, 25 Feb 2014 10:08:35 +0900 |
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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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