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provisional fix for CVS-2011-2895, buffer overflow when uncompressing

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This commit is contained in:
christos 2011-08-16 03:21:47 +00:00
parent 595e2ecd73
commit 5db8b1f126
1 changed files with 3 additions and 1 deletions
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4
usr.bin/gzip/zuncompress.c
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@ -1,4 +1,4 @@
/* $NetBSD: zuncompress.c,v 1.8 2010/11/06 21:42:32 mrg Exp $ */
/* $NetBSD: zuncompress.c,v 1.9 2011/08/16 03:21:47 christos Exp $ */
/*-
* Copyright (c) 1985, 1986, 1992, 1993
@ -288,6 +288,8 @@ zread(void *cookie, char *rbp, int num)
/* Generate output characters in reverse order. */
while (zs->u.r.zs_code >= 256) {
if (zs->u.r.zs_stackp - de_stack >= HSIZE - 1)
return -1;
*zs->u.r.zs_stackp++ = tab_suffixof(zs->u.r.zs_code);
zs->u.r.zs_code = tab_prefixof(zs->u.r.zs_code);
}