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| author | Richard Weinberger <richard@nod.at> | 2015-09-22 23:58:07 +0200 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2015-10-27 22:14:15 -0400 |
| commit | dded44f1aff46ef9cfdcecc52a7688a4b1c73004 (patch) | |
| tree | e2cdc08b3b4ee4ea599ddb272e08ebf1d0751511 | |
| parent | 5b12405cd01699eb0ac6784fb3cd9fb53e80dfd7 (diff) | |
| download | linux-stable-dded44f1aff46ef9cfdcecc52a7688a4b1c73004.tar.gz linux-stable-dded44f1aff46ef9cfdcecc52a7688a4b1c73004.tar.bz2 linux-stable-dded44f1aff46ef9cfdcecc52a7688a4b1c73004.zip | |
UBI: Validate data_size
[ Upstream commit 281fda27673f833a01d516658a64d22a32c8e072 ]
Make sure that data_size is less than LEB size.
Otherwise a handcrafted UBI image is able to trigger
an out of bounds memory access in ubi_compare_lebs().
Cc: stable@vger.kernel.org
Signed-off-by: Richard Weinberger <richard@nod.at>
Reviewed-by: David Gstir <david@sigma-star.at>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
| -rw-r--r-- | drivers/mtd/ubi/io.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/io.c b/drivers/mtd/ubi/io.c index d36134925d31..db657f2168d7 100644 --- a/drivers/mtd/ubi/io.c +++ b/drivers/mtd/ubi/io.c @@ -921,6 +921,11 @@ static int validate_vid_hdr(const struct ubi_device *ubi, goto bad; } + if (data_size > ubi->leb_size) { + ubi_err("bad data_size"); + goto bad; + } + if (vol_type == UBI_VID_STATIC) { /* * Although from high-level point of view static volumes may |