From 02b9047edf5ec7aef57f38adc4c7d18d27e61fbd Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 13 Apr 2022 16:25:32 +0200
Subject: [PATCH] devnum-util: catch potential stack overruns early

---
 src/basic/devnum-util.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/basic/devnum-util.c b/src/basic/devnum-util.c
index e0ecf548839..70c07315c59 100644
--- a/src/basic/devnum-util.c
+++ b/src/basic/devnum-util.c
@@ -18,6 +18,8 @@ int parse_devnum(const char *s, dev_t *ret) {
         n = strspn(s, DIGITS);
         if (n == 0)
                 return -EINVAL;
+        if (n > DECIMAL_STR_MAX(dev_t))
+                return -EINVAL;
         if (s[n] != ':')
                 return -EINVAL;
 
-- 
2.47.3