diff options
| -rw-r--r-- | arch/mips/txx9/generic/setup.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c index 18086c54957..a13a08b8c9e 100644 --- a/arch/mips/txx9/generic/setup.c +++ b/arch/mips/txx9/generic/setup.c @@ -156,11 +156,23 @@ static struct txx9_board_vec *__init find_board_byname(const char *name) static void __init prom_init_cmdline(void) { - int argc = (int)fw_arg0; - int *argv32 = (int *)fw_arg1; + int argc; + int *argv32; int i; /* Always ignore the "-c" at argv[0] */ char builtin[CL_SIZE]; + if (fw_arg0 >= CKSEG0 || fw_arg1 < CKSEG0) { + /* + * argc is not a valid number, or argv32 is not a valid + * pointer + */ + argc = 0; + argv32 = NULL; + } else { + argc = (int)fw_arg0; + argv32 = (int *)fw_arg1; + } + /* ignore all built-in args if any f/w args given */ /* * But if built-in strings was started with '+', append them @@ -414,10 +426,12 @@ char * __init prom_getcmdline(void) const char *__init prom_getenv(const char *name) { - const s32 *str = (const s32 *)fw_arg2; + const s32 *str; - if (!str) + if (fw_arg2 < CKSEG0) return NULL; + + str = (const s32 *)fw_arg2; /* YAMON style ("name", "value" pairs) */ while (str[0] && str[1]) { if (!strcmp((const char *)(unsigned long)str[0], name)) |