common: env_flags: fix loop condition when using env_flags_varaccess_mask
authorPeng Fan <peng.fan@nxp.com>
Tue, 12 Jan 2016 09:23:12 +0000 (17:23 +0800)
committerTom Rini <trini@konsulko.com>
Thu, 14 Jan 2016 02:05:26 +0000 (21:05 -0500)
We should use ARRAY_SIZE, but not sizeof. The size of
env_flags_varaccess_mask is 16bytes, but we only need 4 loops.
If using 16 as the end condition, we may access memory that
not belong to array env_flags_varaccess_mask.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: York Sun <yorksun@freescale.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
common/env_flags.c

index 771935508cb352b6d4f6a9a55c8042e51ba8a749..9c3aed15278dc2fc53ba1bc8571c7da840681731 100644 (file)
@@ -152,7 +152,7 @@ enum env_flags_varaccess env_flags_parse_varaccess_from_binflags(int binflags)
 {
        int i;
 
-       for (i = 0; i < sizeof(env_flags_varaccess_mask); i++)
+       for (i = 0; i < ARRAY_SIZE(env_flags_varaccess_mask); i++)
                if (env_flags_varaccess_mask[i] ==
                    (binflags & ENV_FLAGS_VARACCESS_BIN_MASK))
                        return (enum env_flags_varaccess)i;