diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2017-05-25 07:50:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-13 20:48:15 +0300 |
| commit | 2d0eb3f188e1de0fadaca05b413ea44c217fa7dd (patch) | |
| tree | d5f52eddc07e3a9b06f6e40d0111a36134a72233 /drivers/mtd | |
| parent | 8bf4782062a0a0f6b9ca68f3f6625e1a5fe455fc (diff) | |
| download | linux-2d0eb3f188e1de0fadaca05b413ea44c217fa7dd.tar.xz | |
mtd: nand: check ecc->total sanity in nand_scan_tail
[ Upstream commit 79e0348c4e24fd1affdcf055e0269755580e0fcc ]
Drivers are supposed to set correct ecc->{size,strength,bytes} before
calling nand_scan_tail(), but it does not complain about ecc->total
bigger than oobsize.
In this case, chip->scan_bbt() crashes due to memory corruption, but
it is hard to debug. It would be kind to fail it earlier with a clear
message.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index a3e86e52640a..5fb45161789c 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -4785,6 +4785,11 @@ int nand_scan_tail(struct mtd_info *mtd) goto err_free; } ecc->total = ecc->steps * ecc->bytes; + if (ecc->total > mtd->oobsize) { + WARN(1, "Total number of ECC bytes exceeded oobsize\n"); + ret = -EINVAL; + goto err_free; + } /* * The number of bytes available for a client to place data into |