File cpio-2.9-heap_overflow_in_rtapelib.patch of Package cpio

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File cpio-2.9-heap_overflow_in_rtapelib.patch of Package cpio

From 9bc39283e4cc6ab9e5913ccbf766998eab4ff093 Mon Sep 17 00:00:00 2001
From: Sergey Poznyakoff <gray@gnu.org.ua>
Date: Mon, 01 Mar 2010 08:49:03 +0000
Subject: Bugfixes in rtapelib

* lib/rmt.h (rmtcreat): Use fcntl O_ macros insead of
their hardcoded values.
* lib/rtapelib.c (rmt_read__,rmt_ioctl__): Prevent
potential overflow.
---
Index: cpio-2.9/lib/rmt.h
===================================================================
--- cpio-2.9.orig/lib/rmt.h	2007-06-27 15:49:45.000000000 +0200
+++ cpio-2.9/lib/rmt.h	2010-08-12 14:13:02.000000000 +0200
@@ -61,7 +61,7 @@ extern bool force_local_option;
 
 #define rmtcreat(dev_name, mode, command) \
    (_remdev (dev_name) \
-    ? rmt_open__ (dev_name, 1 | O_CREAT, __REM_BIAS, command) \
+    ? rmt_open__ (dev_name, O_CREAT | O_WRONLY, __REM_BIAS, command) \
     : creat (dev_name, mode))
 
 #define rmtlstat(dev_name, muffer) \
Index: cpio-2.9/lib/rtapelib.c
===================================================================
--- cpio-2.9.orig/lib/rtapelib.c	2010-08-12 14:11:45.000000000 +0200
+++ cpio-2.9/lib/rtapelib.c	2010-08-12 14:13:02.000000000 +0200
@@ -570,7 +570,8 @@ rmt_read__ (int handle, char *buffer, si
 
   sprintf (command_buffer, "R%lu\n", (unsigned long) length);
   if (do_command (handle, command_buffer) == -1
-      || (status = get_status (handle)) == SAFE_READ_ERROR)
+      || (status = get_status (handle)) == SAFE_READ_ERROR
+      || status > length)
     return SAFE_READ_ERROR;
 
   for (counter = 0; counter < status; counter += rlen, buffer += rlen)
@@ -706,6 +707,12 @@ rmt_ioctl__ (int handle, int operation,
 	    || (status = get_status (handle), status == -1))
 	  return -1;
 
+	if (status > sizeof (struct mtop))
+	  {
+	    errno = EOVERFLOW;
+	    return -1;
+	  }
+	
 	for (; status > 0; status -= counter, argument += counter)
 	  {
 	    counter = safe_read (READ_SIDE (handle), argument, status);

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File cpio-2.9-heap_overflow_in_rtapelib.patch of Package cpio

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