From b0eb1a55d6f1180df2d19fda91d08290dff4f687 Mon Sep 17 00:00:00 2001
From: Romain Vimont <rom@rom1v.com>
Date: Thu, 25 Nov 2021 21:35:07 +0100
Subject: [PATCH] Fix adb get-serialno error handling

If pipe read fails, return.
---
 app/src/adb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/src/adb.c b/app/src/adb.c
index 176f50b2..05516280 100644
--- a/app/src/adb.c
+++ b/app/src/adb.c
@@ -304,6 +304,10 @@ adb_get_serialno(struct sc_intr *intr) {
         return NULL;
     }
 
+    if (r == -1) {
+        return false;
+    }
+
     sc_str_truncate(buf, r, " \r\n");
 
     return strdup(buf);