lib/vsprintf.c: fix interaction of kasprintf() and vsnprintf() when u…

…sing %pV Otherwise, the warning at the top of vsnprintf() gets triggered by kvasprintf()'s first invocation (with NULL buffer and zero size) of vsnprintf(). Signed-off-by: Jan Beulich <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
RyanHsu · May 25, 2011 · d9be9b9 · d9be9b9
1 parent 746a2a8
commit d9be9b9
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
@@ -898,7 +898,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 	case 'U':
 		return uuid_string(buf, end, ptr, spec, fmt);
 	case 'V':
-		return buf + vsnprintf(buf, end - buf,
+		return buf + vsnprintf(buf, end > buf ? end - buf : 0,
 				       ((struct va_format *)ptr)->fmt,
 				       *(((struct va_format *)ptr)->va));
 	case 'K':