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mtd: mtdpart: Convert sysfs sprintf/snprintf family to sysfs_emit

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Use sysfs_emit instead of snprintf to avoid buf overrun,because in
sysfs_emit it strictly checks whether buf is null or buf whether
pagesize aligned, otherwise it returns an error.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/1618220144-33839-3-git-send-email-tiantao6@hisilicon.com
This commit is contained in:
Tian Tao 2021-04-12 17:35:44 +08:00 committed by Miquel Raynal
parent 5b2fbe0ca0
commit ce675043fa
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/mtdpart.c
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@ -217,7 +217,7 @@ static ssize_t mtd_partition_offset_show(struct device *dev,
{
struct mtd_info *mtd = dev_get_drvdata(dev);
return snprintf(buf, PAGE_SIZE, "%lld\n", mtd->part.offset);
return sysfs_emit(buf, "%lld\n", mtd->part.offset);
}
static DEVICE_ATTR(offset, S_IRUGO, mtd_partition_offset_show, NULL);