From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 19 Sep 2023 14:04:34 +0000 (+0200)
Subject: cgroup-util: tighten range check before casting to pid_t
X-Git-Tag: v255-rc1~486^2
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5ed7cdfb8fcaf1074174680e404dab5c366dba85;p=thirdparty%2Fsystemd.git

cgroup-util: tighten range check before casting to pid_t
---

diff --git a/src/basic/cgroup-util.c b/src/basic/cgroup-util.c
index 2d13e48366b..92caccfcd47 100644
--- a/src/basic/cgroup-util.c
+++ b/src/basic/cgroup-util.c
@@ -83,6 +83,8 @@ int cg_read_pid(FILE *f, pid_t *ret) {
 
         if (ul <= 0)
                 return -EIO;
+        if (ul > PID_T_MAX)
+                return -EIO;
 
         *ret = (pid_t) ul;
         return 1;