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mtd: lart: Prevent a read from mtd->eraseregions[-1]

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Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Roel Kluin 2009-09-18 12:51:49 -07:00 committed by David Woodhouse
parent f12a947328
commit 4c1e6b2ce1
1 changed files with 4 additions and 2 deletions
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6
drivers/mtd/devices/lart.c
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@ -393,7 +393,8 @@ static int flash_erase (struct mtd_info *mtd,struct erase_info *instr)
* erase range is aligned with the erase size which is in
* effect here.
*/
if (instr->addr & (mtd->eraseregions[i].erasesize - 1)) return (-EINVAL);
if (i < 0 || (instr->addr & (mtd->eraseregions[i].erasesize - 1)))
return -EINVAL;
/* Remember the erase region we start on */
first = i;
@ -409,7 +410,8 @@ static int flash_erase (struct mtd_info *mtd,struct erase_info *instr)
i--;
/* is the end aligned on a block boundary? */
if ((instr->addr + instr->len) & (mtd->eraseregions[i].erasesize - 1)) return (-EINVAL);
if (i < 0 || ((instr->addr + instr->len) & (mtd->eraseregions[i].erasesize - 1)))
return -EINVAL;
addr = instr->addr;
len = instr->len;