diff options
| -rw-r--r-- | lib/vsprintf.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index e5ab51fc2d9e..99747a58ec72 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -1496,13 +1496,14 @@ do { \ case FORMAT_TYPE_STR: { const char *save_str = va_arg(args, char *); size_t len; + if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE || (unsigned long)save_str < PAGE_SIZE) save_str = "(null)"; - len = strlen(save_str); - if (str + len + 1 < end) - memcpy(str, save_str, len + 1); - str += len + 1; + len = strlen(save_str) + 1; + if (str + len < end) + memcpy(str, save_str, len); + str += len; break; } |