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[patch] fix segfault encountered while compressing xorg fonts
From: |
Mike Frysinger |
Subject: |
[patch] fix segfault encountered while compressing xorg fonts |
Date: |
Thu, 7 Dec 2006 08:37:21 -0500 |
User-agent: |
KMail/1.9.5 |
this patch was taken from Debian to address some segfaults encountered while
compressing xorg fonts on alpha systems ... relevant URLs can be found in the
top of the patch
-mike
pgplz0Bio60JO.pgp
Description: PGP signature
Taken from Debian.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=187417
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=184057
http://bugs.gentoo.org/92232
--- gzip-1.3.5.orig/deflate.c
+++ gzip-1.3.5/deflate.c
@@ -643,7 +643,8 @@
/* Find the longest match, discarding those <= prev_length.
* At this point we have always match_length < MIN_MATCH
*/
- if (hash_head != NIL && strstart - hash_head <= MAX_DIST) {
+ if (hash_head != NIL && strstart - hash_head <= MAX_DIST &&
+ strstart <= window_size - MIN_LOOKAHEAD) {
/* To simplify the code, we prevent matches with the string
* of window index 0 (in particular we have to avoid a match
* of the string with itself at the start of the input file).
@@ -737,7 +738,8 @@
match_length = MIN_MATCH-1;
if (hash_head != NIL && prev_length < max_lazy_match &&
- strstart - hash_head <= MAX_DIST) {
+ strstart - hash_head <= MAX_DIST &&
+ strstart <= window_size - MIN_LOOKAHEAD) {
/* To simplify the code, we prevent matches with the string
* of window index 0 (in particular we have to avoid a match
* of the string with itself at the start of the input file).
- [patch] fix segfault encountered while compressing xorg fonts,
Mike Frysinger <=