[PATCH v3 1/9] lib/ucs2_string: Drop arbitrary input size limit and associated WARN()

[Ard Biesheuvel <ardb+git@google.com>]

From: Ard Biesheuvel <ardb@kernel.org>

It's not really the job of library code to WARN and potentially bring
down the system (with panic_on_warn=1) on a condition that is fairly
arbitrary to begin with.

So drop the WARN_ON_ONCE() as well as the condition from ucs2_strscpy().

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 lib/ucs2_string.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ucs2_string.c b/lib/ucs2_string.c
index 1f7dd4eb640a..d66fef9c9b81 100644
--- a/lib/ucs2_string.c
+++ b/lib/ucs2_string.c
@@ -57,7 +57,7 @@ ssize_t ucs2_strscpy(ucs2_char_t *dst, const ucs2_char_t *src, size_t count)
 	 * Ensure that we have a valid amount of space. We need to store at
 	 * least one NUL-character.
 	 */
-	if (count == 0 || WARN_ON_ONCE(count > INT_MAX / sizeof(*dst)))
+	if (count == 0)
 		return -E2BIG;
 
 	/*
-- 
2.55.0.1032.g73a4cd73de-goog