4.13-stable review patch. If anyone has any objections, please let me know.
------------------ From: Richard Genoud <richard.gen...@gmail.com> commit 36de80740008e6a4a55115b4a92e2059e47c1cba upstream. 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.ca...@gmail.com Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver") Reported-by: Richard Genoud <richard.gen...@gmail.com> Pointed-at-by: Boris Brezillon <boris.brezil...@free-electrons.com> Signed-off-by: Richard Genoud <richard.gen...@gmail.com> Reviewed-by: Nicolas Ferre <nicolas.fe...@microchip.com> Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/mtd/nand/atmel/pmecc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/mtd/nand/atmel/pmecc.c +++ b/drivers/mtd/nand/atmel/pmecc.c @@ -363,7 +363,7 @@ atmel_pmecc_create_user(struct atmel_pme 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)
