From: Minchan Kim <minchan@xxxxxxxxxx>
Subject: zram: avoid null access when fail to alloc meta
zram_meta_alloc could fail so caller should check it. Otherwise, your
system will hang.
Signed-off-by: Minchan Kim <minchan@xxxxxxxxxx>
Acked-by: Jerome Marchand <jmarchan@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/zram_drv.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN drivers/block/zram/zram_drv.c~zram-avoid-null-access-when-fail-to-alloc-meta drivers/block/zram/zram_drv.c
--- a/drivers/block/zram/zram_drv.c~zram-avoid-null-access-when-fail-to-alloc-meta
+++ a/drivers/block/zram/zram_drv.c
@@ -612,6 +612,8 @@ static ssize_t disksize_store(struct dev
disksize = PAGE_ALIGN(disksize);
meta = zram_meta_alloc(disksize);
+ if (!meta)
+ return -ENOMEM;
down_write(&zram->init_lock);
if (zram->init_done) {
up_write(&zram->init_lock);
_
--
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