From 139e798bf91cbe3e65c0c81e602ab5f6ee6d6085 Mon Sep 17 00:00:00 2001
From: Tom Marshall <tdm@cyngn.com>
Date: Fri, 18 Dec 2015 14:45:25 -0800
Subject: [PATCH] otasigcheck: Avoid long lines in XML

Shells based on busybox, such as found in CM 12.1 recovery and TWRP, do not
properly handle pattern based parameter expansion for variables longer than
4kb.  This throws our naive little XML parser into an infinite loop.  Since
all such lines are associated with external app certs, just skip them.

Change-Id: I203b65c1ffd62bf3261b3ae315327314a5006952
---
 prebuilt/common/bin/otasigcheck.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/prebuilt/common/bin/otasigcheck.sh b/prebuilt/common/bin/otasigcheck.sh
index 99fdaec2..aba53b01 100644
--- a/prebuilt/common/bin/otasigcheck.sh
+++ b/prebuilt/common/bin/otasigcheck.sh
@@ -20,6 +20,9 @@ if [ -f "/data/system/packages.xml" -a -f "/tmp/releasekey" ]; then
   OLDIFS="$IFS"
   IFS=""
   while read line; do
+    if [ "${#line}" -gt 4094 ]; then
+      continue
+    fi
     params=${line# *<package *}
     if [ "$line" != "$params" ]; then
       kvp=${params%% *}