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authorRoel Kluin <roel.kluin@gmail.com>2009-09-18 12:51:49 -0700
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-09-19 11:18:46 -0700
commitebf2e93036907fe2a7ddab942aa63d35f97f3b2b (patch)
tree96661a766ddfa291782bded4c966c82445ca42eb /drivers/mtd
parent4c1e6b2ce13b154a4a69cee220c98976f4b784df (diff)
downloadop-kernel-dev-ebf2e93036907fe2a7ddab942aa63d35f97f3b2b.zip
op-kernel-dev-ebf2e93036907fe2a7ddab942aa63d35f97f3b2b.tar.gz
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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/mtdconcat.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index 792b547..db6de74 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;
}
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