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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: f88fc122cc ("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>
This commit is contained in:
Richard Genoud 2017-09-27 14:49:17 +02:00 committed by Boris Brezillon
parent 7e439681af
commit 36de807400
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/atmel/pmecc.c
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@ -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)