From: Jim Meyering <jim@meyering.net>
Date: Thu, 10 Apr 2003 16:47:35 +0000 (+0000)
Subject: (canonicalize_file_name): Return NULL immediately if resolvepath fails.
X-Git-Tag: v5.0.1~762
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ef6c0046482844db49d7b2e0729f6c98f37efae4;p=thirdparty%2Fcoreutils.git

(canonicalize_file_name): Return NULL immediately if resolvepath fails.
Otherwise, `readlink --canonical /no-such-file' would exhaust
virtual memory on some systems (e.g. Solaris).
---

diff --git a/lib/canonicalize.c b/lib/canonicalize.c
index 66622817be..e82ae75ad8 100644
--- a/lib/canonicalize.c
+++ b/lib/canonicalize.c
@@ -147,6 +147,11 @@ canonicalize_file_name (const char *name)
       resolved_size = 2 * resolved_size + 1;
       resolved = xmalloc (resolved_size);
       resolved_len = resolvepath (name, resolved, resolved_size);
+      if (resolved_len < 0)
+	{
+	  free (resolved);
+	  return NULL;
+	}
       if (resolved_len < resolved_size)
 	break;
       free (resolved);