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| author |   Richard Genoud <richard.genoud@gmail.com> | 2017-09-27 14:49:17 +0200 |
|---|---|---|
| committer |   Boris Brezillon <boris.brezillon@free-electrons.com> | 2017-09-27 17:33:28 +0200 |
| commit | 36de80740008e6a4a55115b4a92e2059e47c1cba (patch) | |
| tree | 3ddf803d3eb94de9ccb466f10deb5ae48ff058e8 /drivers/mtd | |
| parent | mtd: Fix partition alignment check on multi-erasesize devices (diff) | |
| download | linux-dev-36de80740008e6a4a55115b4a92e2059e47c1cba.tar.xz linux-dev-36de80740008e6a4a55115b4a92e2059e47c1cba.zip | |
mtd: nand: atmel: fix buffer overflow in atmel_pmecc_user
When calculating the size needed by struct atmel_pmecc_user *user,
the dmu and delta buffer sizes were forgotten.
This lead to a memory corruption (especially with a large ecc_strength).
Link: http://lkml.kernel.org/r/1506503157.3016.5.camel@gmail.com
Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Cc: stable@vger.kernel.org
Reported-by: Richard Genoud <richard.genoud@gmail.com>
Pointed-at-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/atmel/pmecc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mtd/nand/atmel/pmecc.c b/drivers/mtd/nand/atmel/pmecc.c index 146af8218314..8268636675ef 100644 --- a/drivers/mtd/nand/atmel/pmecc.c +++ b/drivers/mtd/nand/atmel/pmecc.c @@ -363,7 +363,7 @@ atmel_pmecc_create_user(struct atmel_pmecc *pmecc, size += (req->ecc.strength + 1) * sizeof(u16); /* Reserve space for mu, dmu and delta. */ size = ALIGN(size, sizeof(s32)); - size += (req->ecc.strength + 1) * sizeof(s32); + size += (req->ecc.strength + 1) * sizeof(s32) * 3; user = kzalloc(size, GFP_KERNEL); if (!user) |