From: Karel Zak <kzak@redhat.com>
Date: Wed, 12 Mar 2025 14:05:47 +0000 (+0100)
Subject: unshare: make strings more robust
X-Git-Tag: v2.41~26
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=ae39afa104bdfb9d7cc8f6df5ff2310626e98d11;p=thirdparty%2Futil-linux.git

unshare: make strings more robust

Signed-off-by: Karel Zak <kzak@redhat.com>
(cherry picked from commit ad591f1a8e5917cd41d91de18626494e072414f8)
---

diff --git a/sys-utils/unshare.c b/sys-utils/unshare.c
index d5ce369c2..0490c1532 100644
--- a/sys-utils/unshare.c
+++ b/sys-utils/unshare.c
@@ -737,7 +737,7 @@ static int is_fixed(const char *interp)
 
 	flags = strrchr(interp, ':');
 
-	return strchr(flags, 'F') != NULL;
+	return flags && strchr(flags, 'F') != NULL;
 }
 
 static void load_interp(const char *binfmt_mnt, const char *interp)