diff options
| author | Roel Kluin <roel.kluin@gmail.com> | 2009-09-18 12:51:49 -0700 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-09-19 11:18:46 -0700 |
| commit | ebf2e93036907fe2a7ddab942aa63d35f97f3b2b (patch) | |
| tree | 96661a766ddfa291782bded4c966c82445ca42eb | |
| parent | 4c1e6b2ce13b154a4a69cee220c98976f4b784df (diff) | |
mtd: mtdconcat: prevent a read from eraseregions[-1]
If the erase region was found in the first iteration we read from
eraseregions[-1]
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>
| -rw-r--r-- | drivers/mtd/mtdconcat.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c index 792b547786b8..db6de74082ad 100644 --- a/drivers/mtd/mtdconcat.c +++ b/drivers/mtd/mtdconcat.c @@ -427,7 +427,7 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) * to-be-erased area begins. Verify that the starting * offset is aligned to this region's erase size: */ - if (instr->addr & (erase_regions[i].erasesize - 1)) + if (i < 0 || instr->addr & (erase_regions[i].erasesize - 1)) return -EINVAL; /* @@ -440,8 +440,8 @@ static int concat_erase(struct mtd_info *mtd, struct erase_info *instr) /* * check if the ending offset is aligned to this region's erase size */ - if ((instr->addr + instr->len) & (erase_regions[i].erasesize - - 1)) + if (i < 0 || ((instr->addr + instr->len) & + (erase_regions[i].erasesize - 1))) return -EINVAL; } |