diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/parsers/afs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mtd/parsers/afs.c b/drivers/mtd/parsers/afs.c index 26116694c821..7ab3d50f565e 100644 --- a/drivers/mtd/parsers/afs.c +++ b/drivers/mtd/parsers/afs.c @@ -235,6 +235,9 @@ static int afs_parse_v2_partition(struct mtd_info *mtd, pr_debug("Parsing v2 partition @%08x-%08x\n", off, off + mtd->erasesize); + if (mtd->erasesize < sizeof(footer)) + return -EINVAL; + /* First read the footer */ ptr = off + mtd->erasesize - sizeof(footer); ret = mtd_read(mtd, ptr, sizeof(footer), &sz, (u_char *)footer); @@ -245,6 +248,8 @@ static int afs_parse_v2_partition(struct mtd_info *mtd, } name = (char *) &footer[0]; version = footer[9]; + if (footer[8] > mtd->erasesize - sizeof(footer)) + return -EINVAL; ptr = off + mtd->erasesize - sizeof(footer) - footer[8]; pr_debug("found image \"%s\", version %08x, info @%08x\n", @@ -278,6 +283,8 @@ static int afs_parse_v2_partition(struct mtd_info *mtd, entrypoint = imginfo[pad]; attributes = imginfo[pad+1]; region_count = imginfo[pad+2]; + if (region_count > (ARRAY_SIZE(imginfo) - pad - 3) / 4) + return -EINVAL; block_start = imginfo[20]; block_end = imginfo[21]; |