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authorRichard Genoud <richard.genoud@gmail.com>2012-08-20 18:00:13 +0200
committerArtem Bityutskiy <artem.bityutskiy@linux.intel.com>2012-09-04 09:39:01 +0300
commitd2f588f9340ed23dfb6cda08b8a1917ef3e8527c (patch)
tree162ea3e7fb652a79cf439f65b791a6287a9e4ce5 /drivers/mtd
parent256334c3191af9d9e520082db9beb75ff801d86c (diff)
downloadlinux-d2f588f9340ed23dfb6cda08b8a1917ef3e8527c.tar.bz2
UBI: check max_beb_per1024 value in ubi_attach_mtd_dev
max_beb_per1024 shouldn't be negative, and a 0 value will be treated as the default value. For the upper bound, 768/1024 should be enough. Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/ubi/build.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 8a4eb7c3e0f4..3700bf77b0b8 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -49,6 +49,9 @@
/* Maximum number of comma-separated items in the 'mtd=' parameter */
#define MTD_PARAM_MAX_COUNT 2
+/* Maximum value for the number of bad PEBs per 1024 PEBs */
+#define MAX_MTD_UBI_BEB_LIMIT 768
+
#ifdef CONFIG_MTD_UBI_MODULE
#define ubi_is_module() 1
#else
@@ -852,6 +855,12 @@ int ubi_attach_mtd_dev(struct mtd_info *mtd, int ubi_num,
struct ubi_device *ubi;
int i, err, ref = 0;
+ if (max_beb_per1024 < 0 || max_beb_per1024 > MAX_MTD_UBI_BEB_LIMIT)
+ return -EINVAL;
+
+ if (!max_beb_per1024)
+ max_beb_per1024 = CONFIG_MTD_UBI_BEB_LIMIT;
+
/*
* Check if we already have the same MTD device attached.
*