From: GNU Libc Maintainers <debian-glibc@lists.debian.org>
Date: Mon, 10 Jun 2024 20:25:19 +0000 (+0200)
Subject: git-realpath_NULL
X-Git-Tag: archive/raspbian/2.38-13+rpi1^2~82
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=cd77a614f0fb1cd0a1a9e85881c9e19afa7439a4;p=glibc.git

git-realpath_NULL

commit 2345bc44bb34f3eb6b49f4db3f0369573b892c3d
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Thu Aug 3 21:15:58 2023 +0200

    Subject: hurd: Make __realpath return EINVAL on NULL buf

    As Posix and stdlib/test-canon.c expects it, and rather than letting
    pathconf crash.


Gbp-Pq: Topic hurd-i386
Gbp-Pq: Name git-realpath_NULL.diff
---

diff --git a/debug/realpath_chk.c b/debug/realpath_chk.c
index adfc09237..8e734b534 100644
--- a/debug/realpath_chk.c
+++ b/debug/realpath_chk.c
@@ -19,6 +19,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <errno.h>
 
 
 char *
@@ -30,7 +31,15 @@ __realpath_chk (const char *buf, char *resolved, size_t resolvedlen)
 
   return __realpath (buf, resolved);
 #else
-  long int pathmax =__pathconf (buf, _PC_PATH_MAX);
+  long int pathmax;
+
+  if (buf == NULL)
+    {
+      __set_errno (EINVAL);
+      return NULL;
+    }
+
+  pathmax = __pathconf (buf, _PC_PATH_MAX);
   if (pathmax != -1)
     {
       /* We do have a fixed limit.  */