commit 4bac44e46e064ae17d47670f8a304a6519fa7b42
Author: Jakub Jelen <jjelen@redhat.com>
Date:   Thu Jun 24 10:24:31 2021 +0200

    Accept whole range of supported pids
    
    Signed-off-by: Jakub Jelen <jjelen@redhat.com>

diff --git a/src/pam_wrapper.c b/src/pam_wrapper.c
index 6801d7b..efa7cbb 100644
--- a/src/pam_wrapper.c
+++ b/src/pam_wrapper.c
@@ -791,14 +791,20 @@ static void pwrap_clean_stale_dirs(const char *dir)
 	buf[sizeof(buf) - 1] = '\0';
 
 	tmp = strtol(buf, NULL, 10);
-	if (tmp == 0 || tmp > 0xFFFF || errno == ERANGE) {
+	if (tmp == 0 || errno == ERANGE) {
 		PWRAP_LOG(PWRAP_LOG_ERROR,
 			  "Failed to parse pid, buf=%s",
 			  buf);
 		return;
 	}
 
-	pid = (pid_t)(tmp & 0xFFFF);
+	pid = (pid_t)tmp;
+	/* Check if we are out of pid_t range on this system */
+	if ((long)pid != tmp) {
+		PWRAP_LOG(PWRAP_LOG_ERROR,
+			  "pid out of range: %ld", tmp);
+		return;
+	}
 
 	rc = kill(pid, 0);
 	if (rc == -1) {