File fix-division-by-zero.patch of Package libmspack.20475

From b3102f4707a32d60514c06c399c3be4caffd7f25 Mon Sep 17 00:00:00 2001
From: Stuart Caie <kyzer@4u.net>
Date: Sat, 17 Jan 2015 16:11:20 +0000
Subject: [PATCH] A reset interval of 0 is invalid

---
 libmspack/trunk/ChangeLog     | 3 +++
 libmspack/trunk/mspack/chmd.c | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

#diff --git a/libmspack/trunk/ChangeLog b/libmspack/trunk/ChangeLog
#index ca402c6..dbd13dc 100644
#--- a/libmspack/trunk/ChangeLog
#+++ b/libmspack/trunk/ChangeLog
#@@ -3,6 +3,9 @@
# 	* GET_UTF8_CHAR(): Remove 5/6-byte encoding support and check decoded
# 	chars are no more than U+10FFFF.
# 
#+	* chmd_init_decomp(): A reset interval of 0 is invalid. Thanks to
#+	Jakub Wilk for finding the issue and providing a sample and patch.
#+
# 2015-01-15  Stuart Caie <kyzer@4u.net>
# 
# 	* chmd_read_headers(): add a bounds check to prevent over-reading data,
diff --git a/libmspack/trunk/mspack/chmd.c b/libmspack/trunk/mspack/chmd.c
index 83624ae..c2257ae 100644
--- a/libmspack/trunk/mspack/chmd.c
+++ b/libmspack/trunk/mspack/chmd.c
@@ -1117,7 +1117,7 @@ static int chmd_init_decomp(struct mschm_decompressor_p *self,
   }
 
   /* validate reset_interval */
-  if (reset_interval % LZX_FRAME_SIZE) {
+  if (reset_interval == 0 || reset_interval % LZX_FRAME_SIZE) {
     D(("bad controldata reset interval"))
     return self->error = MSPACK_ERR_DATAFORMAT;
   }
-- 
2.4.3