[U-Boot] [PATCH v2 12/13] input: Fix zero-sized array

[Eugeniu Rosca]

Fix below UBSAN reports, thrown on sandbox:

 ============================================================
 UBSAN: Undefined behaviour in drivers/input/input.c:512:7
 variable length array bound value 0 <= 0
 ============================================================
 ============================================================
 UBSAN: Undefined behaviour in drivers/input/input.c:340:6
 variable length array bound value 0 <= 0
 ============================================================

Inspired from Linux v4.11-rc1 commit 620711944459 ("crypto:
algif_hash - avoid zero-sized array").

Fixes: 9bc590e5119f ("input: Add generic keyboard input handler")
Signed-off-by: Eugeniu Rosca <erosca at de.adit-jv.com>
---

Changes in v2:
 - None. Newly pushed.
---
 drivers/input/input.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 29620a9e2793..a8fd197883aa 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -337,7 +337,7 @@ static int array_search(int *array, int count, int key)
 static int sort_array_by_ordering(int *dest, int count, int *order,
 				   int ocount)
 {
-	int temp[count];
+	int temp[count ? : 1];
 	int dest_count;
 	int same;	/* number of elements which are the same */
 	int i;
@@ -509,7 +509,7 @@ static int input_keycodes_to_ascii(struct input_config *config,
 static int _input_send_keycodes(struct input_config *config, int keycode[],
 				int num_keycodes, bool do_send)
 {
-	char ch[num_keycodes * ANSI_CHAR_MAX];
+	char ch[(num_keycodes * ANSI_CHAR_MAX) ? : 1];
 	int count, i, same = 0;
 	int is_repeat = 0;
 	unsigned delay_ms;
-- 
2.18.0