app-arch/cpio/files/cpio-2.11-security.patch

diff -uNr cpio-2.11.ORIG/src/copyin.c cpio-2.11/src/copyin.c
--- cpio-2.11.ORIG/src/copyin.c	2015-01-09 11:31:49.017090090 +0000
+++ cpio-2.11/src/copyin.c	2015-01-09 11:35:37.723092293 +0000
@@ -124,10 +124,30 @@
   if (pad != 0)
     tape_toss_input (in_file_des, pad);
 }
-
+
+static char *
+get_link_name (struct cpio_file_stat *file_hdr, int in_file_des)
+{
+  char *link_name;
+  
+  if (file_hdr->c_filesize < 0 || file_hdr->c_filesize > SIZE_MAX-1)
+    {
+      error (0, 0, _("%s: stored filename length is out of range"),
+	     file_hdr->c_name);
+      link_name = NULL;
+    }
+  else
+    {
+      link_name = xmalloc (file_hdr->c_filesize + 1);
+      tape_buffered_read (link_name, in_file_des, file_hdr->c_filesize);
+      link_name[file_hdr->c_filesize] = '\0';
+      tape_skip_padding (in_file_des, file_hdr->c_filesize);
+    }
+  return link_name;
+}
 
 static void
-list_file(struct cpio_file_stat* file_hdr, int in_file_des)
+list_file (struct cpio_file_stat* file_hdr, int in_file_des)
 {
   if (verbose_flag)
     {
@@ -136,21 +156,16 @@
 	{
 	  if (archive_format != arf_tar && archive_format != arf_ustar)
 	    {
-	      char *link_name = NULL;	/* Name of hard and symbolic links.  */
-
-	      link_name = (char *) xmalloc ((unsigned int) file_hdr->c_filesize + 1);
-	      link_name[file_hdr->c_filesize] = '\0';
-	      tape_buffered_read (link_name, in_file_des, file_hdr->c_filesize);
-	      long_format (file_hdr, link_name);
-	      free (link_name);
-	      tape_skip_padding (in_file_des, file_hdr->c_filesize);
-	      return;
+	      char *link_name = get_link_name (file_hdr, in_file_des);
+	      if (link_name)
+		{
+		  long_format (file_hdr, link_name);
+		  free (link_name);
+		}
 	    }
 	  else
-	    {
-	      long_format (file_hdr, file_hdr->c_tar_linkname);
-	      return;
-	    }
+	    long_format (file_hdr, file_hdr->c_tar_linkname);
+	  return;
 	}
       else
 #endif
@@ -640,7 +655,7 @@
 }
 
 static void
-copyin_link(struct cpio_file_stat *file_hdr, int in_file_des)
+copyin_link (struct cpio_file_stat *file_hdr, int in_file_des)
 {
   char *link_name = NULL;	/* Name of hard and symbolic links.  */
   int res;			/* Result of various function calls.  */
@@ -650,10 +665,9 @@
 
   if (archive_format != arf_tar && archive_format != arf_ustar)
     {
-      link_name = (char *) xmalloc ((unsigned int) file_hdr->c_filesize + 1);
-      link_name[file_hdr->c_filesize] = '\0';
-      tape_buffered_read (link_name, in_file_des, file_hdr->c_filesize);
-      tape_skip_padding (in_file_des, file_hdr->c_filesize);
+      link_name = get_link_name (file_hdr, in_file_des);
+      if (!link_name)
+	return;
     }
   else
     {
@@ -1005,7 +1019,7 @@
 
   file_hdr->c_tar_linkname = NULL;
 
-  tape_buffered_read (magic.str, in_des, 6L);
+  tape_buffered_read (magic.str, in_des, sizeof (magic.str));
   while (1)
     {
       if (append_flag)
@@ -1050,8 +1064,8 @@
 	  break;
 	}
       bytes_skipped++;
-      memmove (magic.str, magic.str + 1, 5);
-      tape_buffered_read (magic.str, in_des, 1L);
+      memmove (magic.str, magic.str + 1, sizeof (magic.str) - 1);
+      tape_buffered_read (magic.str + sizeof (magic.str) - 1, in_des, 1L);
     }
 }
 
diff -uNr cpio-2.11.ORIG/src/util.c cpio-2.11/src/util.c
--- cpio-2.11.ORIG/src/util.c	2015-01-09 11:31:49.018090090 +0000
+++ cpio-2.11/src/util.c	2015-01-09 11:36:55.794093045 +0000
@@ -206,10 +206,7 @@
   if (input_size < 0)
     error (1, errno, _("read error"));
   if (input_size == 0)
-    {
-      error (0, 0, _("premature end of file"));
-      exit (1);
-    }
+    error (PAXEXIT_FAILURE, 0, _("premature end of file"));
   input_bytes += input_size;
 }
 
diff -uNr cpio-2.11.ORIG/tests/Makefile.am cpio-2.11/tests/Makefile.am
--- cpio-2.11.ORIG/tests/Makefile.am	2015-01-09 11:31:49.020090090 +0000
+++ cpio-2.11/tests/Makefile.am	2015-01-09 11:34:05.121091401 +0000
@@ -52,6 +52,8 @@
  setstat04.at\
  setstat05.at\
  symlink.at\
+ symlink-bad-length.at\
+ symlink-long.at\
  version.at
 
 TESTSUITE = $(srcdir)/testsuite
diff -uNr cpio-2.11.ORIG/tests/symlink-bad-length.at cpio-2.11/tests/symlink-bad-length.at
--- cpio-2.11.ORIG/tests/symlink-bad-length.at	1970-01-01 01:00:00.000000000 +0100
+++ cpio-2.11/tests/symlink-bad-length.at	2015-01-09 11:35:52.124092432 +0000
@@ -0,0 +1,64 @@
+# Process this file with autom4te to create testsuite.  -*- Autotest -*-
+# Copyright (C) 2014 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA.
+
+# Cpio v2.11 did segfault with badly set symlink length.
+# References:
+# http://lists.gnu.org/archive/html/bug-cpio/2014-11/msg00007.html
+
+AT_SETUP([symlink-bad-length])
+AT_KEYWORDS([symlink-long copyout])
+
+AT_DATA([ARCHIVE.base64],
+[x3EjAIBAtIEtJy8nAQAAAHRUYW0FAAAADQBGSUxFAABzb21lIGNvbnRlbnQKAMdxIwBgQ/+hLScv
+JwEAAAB0VEhuBQD/////TElOSwAARklMRcdxAAAAAAAAAAAAAAEAAAAAAAAACwAAAAAAVFJBSUxF
+UiEhIQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
+AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
+])
+
+# The exact error message and exit status depend on the host architecture,
+# therefore strderr is filtered out and error code is not checked.
+
+# So far the only case when cpio would exit with code 0 is when it skips
+# several bytes and encounters a valid record header.  Perhaps it should
+# exit with code 2 (non-critical error), if at least one byte was skipped,
+# but that could hurt backward compatibility.
+
+AT_CHECK([
+base64 -d ARCHIVE.base64 > ARCHIVE || AT_SKIP_TEST
+TZ=UTC cpio -ntv < ARCHIVE 2>stderr 
+cat stderr | grep -v \
+    -e 'stored filename length is out of range' \
+    -e 'premature end of file' \
+    -e 'archive header has reverse byte-order' \
+    -e 'memory exhausted' \
+    -e 'skipped [[0-9][0-9]*] bytes of junk' \
+    -e '[[0-9][0-9]*] block' \
+    >&2
+echo >&2 STDERR
+],
+[0],
+[-rw-rw-r--   1 10029    10031          13 Nov 25 11:52 FILE
+],[STDERR
+])
+
+AT_CLEANUP
diff -uNr cpio-2.11.ORIG/tests/symlink-long.at cpio-2.11/tests/symlink-long.at
--- cpio-2.11.ORIG/tests/symlink-long.at	1970-01-01 01:00:00.000000000 +0100
+++ cpio-2.11/tests/symlink-long.at	2015-01-09 11:32:53.908090715 +0000
@@ -0,0 +1,46 @@
+# Process this file with autom4te to create testsuite.  -*- Autotest -*-
+# Copyright (C) 2014 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA.
+
+# Cpio v2.11.90 changed the way symlink name is read from archive.
+# References:
+# http://lists.gnu.org/archive/html/bug-cpio/2014-11/msg00007.html
+
+AT_SETUP([symlink-long])
+AT_KEYWORDS([symlink-long copyout])
+
+AT_CHECK([
+
+# len(dirname) > READBUFSIZE
+dirname=
+for i in {1..52}; do
+    dirname="xxxxxxxxx/$dirname"
+    mkdir "$dirname"
+done
+ln -s "$dirname" x || AT_SKIP_TEST
+
+echo x | cpio -o > ar
+list=`cpio -tv < ar | sed 's|.*-> ||'`
+test "$list" = "$dirname" && echo success || echo fail
+],
+[0],
+[success
+],[2 blocks
+2 blocks
+])
+
+AT_CLEANUP
diff -uNr cpio-2.11.ORIG/tests/testsuite.at cpio-2.11/tests/testsuite.at
--- cpio-2.11.ORIG/tests/testsuite.at	2015-01-09 11:31:49.020090090 +0000
+++ cpio-2.11/tests/testsuite.at	2015-01-09 11:34:34.386091683 +0000
@@ -31,6 +31,8 @@
 
 m4_include([inout.at])
 m4_include([symlink.at])
+m4_include([symlink-bad-length.at])
+m4_include([symlink-long.at])
 m4_include([interdir.at])
 
 m4_include([setstat01.at])