From bb0a13a13411c4ce24c48c8ff3cdf7b48d237240 Mon Sep 17 00:00:00 2001 From: Richard Genoud Date: Wed, 12 Sep 2012 14:26:26 +0200 Subject: [PATCH] mtd: nandsim: bugfix: fail if overridesize is too big If override size is too big, the module was actually loaded instead of failing, because retval was not set. This lead to memory corruption with the use of the freed structs nandsim and nand_chip. Cc: stable@vger.kernel.org Signed-off-by: Richard Genoud Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/nand/nandsim.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index 21e64b5d352b..a932c485eb04 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -2317,6 +2317,7 @@ static int __init ns_init_module(void) uint64_t new_size = (uint64_t)nsmtd->erasesize << overridesize; if (new_size >> overridesize != nsmtd->erasesize) { NS_ERR("overridesize is too big\n"); + retval = -EINVAL; goto err_exit; } /* N.B. This relies on nand_scan not doing anything with the size before we change it */ -- 2.11.0