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Commit f636ffb4 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by David Woodhouse
Browse files

[MTD][MTDPART] Fix a division by zero bug 



When detecting a partition beyond the end of the device, skip most of
the initialisation, in particular those bits causing a division by zero.

Signed-off-by: default avatarJörn Engel <joern@logfs.org>
Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 6910c136

drivers/mtd/mtdpart.c

+3 −1
Original line number Diff line number Diff line
@@ -416,6 +416,7 @@ static struct mtd_part *add_one_partition(struct mtd_info *master, 
		slave->mtd.size = 0;

		printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",

			part->name);

		goto out_register;

	}

	if (slave->offset + slave->mtd.size > master->size) {

		slave->mtd.size = master->size - slave->offset;
@@ -475,6 +476,7 @@ static struct mtd_part *add_one_partition(struct mtd_info *master, 
		}

	}



out_register:

	if (part->mtdp) {

		/* store the object pointer (caller may or may not register it*/

		*part->mtdp = &slave->mtd;