Fix the potential segmentation fault
Extral newline can trigger recovery segmentation fault
Test case:
host$ adb shell 'echo -en "--update_package=ota_update.zip\n--show_text\n\n" > /cache/recovery/command'
host$ adb reboot recovery
Change-Id: If1781c1f5ad94a273f1cb122b67cedd9fb562433
Signed-off-by: Jin Feng <jin88.feng@gmail.com>
diff --git a/recovery.cpp b/recovery.cpp
index 92aa503..2541e54 100644
--- a/recovery.cpp
+++ b/recovery.cpp
@@ -198,6 +198,7 @@
if (*argc <= 1) {
FILE *fp = fopen_path(COMMAND_FILE, "r");
if (fp != NULL) {
+ char *token;
char *argv0 = (*argv)[0];
*argv = (char **) malloc(sizeof(char *) * MAX_ARGS);
(*argv)[0] = argv0; // use the same program name
@@ -205,7 +206,12 @@
char buf[MAX_ARG_LENGTH];
for (*argc = 1; *argc < MAX_ARGS; ++*argc) {
if (!fgets(buf, sizeof(buf), fp)) break;
- (*argv)[*argc] = strdup(strtok(buf, "\r\n")); // Strip newline.
+ token = strtok(buf, "\r\n");
+ if (token != NULL) {
+ (*argv)[*argc] = strdup(token); // Strip newline.
+ } else {
+ --*argc;
+ }
}
check_and_fclose(fp, COMMAND_FILE);