tree-wide: set WRITE_STRING_FILE_DISABLE_BUFFER flag when we write files under /proc or /sys

src/basic/smack-util.c

@@ -115,7 +115,7 @@ int mac_smack_apply_pid(pid_t pid, const char *label) {
                 return 0;
 
         p = procfs_file_alloca(pid, "attr/current");
-        r = write_string_file(p, label, 0);
+        r = write_string_file(p, label, WRITE_STRING_FILE_DISABLE_BUFFER);
         if (r < 0)
                 return r;
 

src/basic/util.c

@@ -606,7 +606,7 @@ void disable_coredumps(void) {
         if (detect_container() > 0)
                 return;
 
-        r = write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0);
+        r = write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", WRITE_STRING_FILE_DISABLE_BUFFER);
         if (r < 0)
                 log_debug_errno(r, "Failed to turn off coredumps, ignoring: %m");
 }