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-rw-r--r--src/shared/reboot-util.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/shared/reboot-util.c b/src/shared/reboot-util.c
index 756f9d3..618658a 100644
--- a/src/shared/reboot-util.c
+++ b/src/shared/reboot-util.c
@@ -11,8 +11,15 @@
#include "reboot-util.h"
#include "string-util.h"
#include "umask-util.h"
+#include "utf8.h"
#include "virt.h"
+bool reboot_parameter_is_valid(const char *parameter) {
+ assert(parameter);
+
+ return ascii_is_valid(parameter) && strlen(parameter) <= NAME_MAX;
+}
+
int update_reboot_parameter_and_warn(const char *parameter, bool keep) {
int r;
@@ -30,6 +37,9 @@ int update_reboot_parameter_and_warn(const char *parameter, bool keep) {
return 0;
}
+ if (!reboot_parameter_is_valid(parameter))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid reboot parameter '%s'.", parameter);
+
RUN_WITH_UMASK(0022) {
r = write_string_file("/run/systemd/reboot-param", parameter,
WRITE_STRING_FILE_CREATE|WRITE_STRING_FILE_ATOMIC);