gzip/gzip.patch@f71e028eb3e2
gzip/gzip.patch
Sun, 03 Apr 2011 13:34:55 +0200
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sun, 03 Apr 2011 13:34:55 +0200
- changeset 337
- f71e028eb3e2
- permissions
- -rw-r--r--
Correct and improve several packaging aspects including...
Correct datadir path for python modules, correct jar(1) path for
building libgcj classes, strip libexecdir path of version numbers,
improve name of oblbld build path, clean whitespace from as(1) and
ld(1) GNU detection, remove seemingly discarded '--with-local-prefix'
configure argument, and correct hardcoded lto plugin libtool archive
dependency information.
Most importantly, correct IA32 architecture detection logic in
config.gcc to correctly emit SSE2 instructions conditionally, leading
to the removal of all '-march' bootstrap options and replacement with
unconditional (for IA32/AMD64) '-mtune=native' options. Comments and
buildtime warnings are corrected appropriately. In theory these changes
cause a more portable, orthoganal, and optimal bootstrap to be built.
1 Security Fix
3 Index: gzip.c
4 --- gzip.c.orig 2009-09-26 20:56:02 +0200
5 +++ gzip.c 2009-10-07 07:59:53 +0200
6 @@ -168,7 +168,7 @@
7 DECLARE(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
8 DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
9 DECLARE(ush, d_buf, DIST_BUFSIZE);
10 -DECLARE(uch, window, 2L*WSIZE);
11 +DECLARE(uch, window, 2L*WSIZE + 4096); /* enlarge to avoid crashs due to peeking beyond the buffer end */
12 #ifndef MAXSEG_64K
13 DECLARE(ush, tab_prefix, 1L<<BITS);
14 #else
16 -----------------------------------------------------------------------------
18 Security Fixes
19 - OOB write (CVE-2006-4335)
20 - Buffer underflow (CVE-2006-4336)
21 - Buffer overflow (CVE-2006-4337)
22 - Infinite loop (CVE-2006-4338)
24 Index: gzip.h
25 --- gzip.h.orig 2009-09-26 20:43:28 +0200
26 +++ gzip.h 2009-10-07 07:59:53 +0200
27 @@ -223,6 +223,8 @@
28 extern int to_stdout; /* output to stdout (-c) */
29 extern int save_orig_name; /* set if original name must be saved */
31 +#define MIN(a,b) ((a) <= (b) ? (a) : (b))
32 +
33 #define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf(0))
34 #define try_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf(1))
36 Index: unlzh.c
37 --- unlzh.c.orig 2009-09-26 20:20:40 +0200
38 +++ unlzh.c 2009-10-07 07:59:53 +0200
39 @@ -141,12 +141,17 @@
40 unsigned i, k, len, ch, jutbits, avail, nextcode, mask;
42 for (i = 1; i <= 16; i++) count[i] = 0;
43 - for (i = 0; i < (unsigned)nchar; i++) count[bitlen[i]]++;
44 + for (i = 0; i < (unsigned)nchar; i++) {
45 + if (bitlen[i] > 16)
46 + error("Bad table\n");
47 + else
48 + count[bitlen[i]]++;
49 + }
51 start[1] = 0;
52 for (i = 1; i <= 16; i++)
53 start[i + 1] = start[i] + (count[i] << (16 - i));
54 - if ((start[17] & 0xffff) != 0)
55 + if ((start[17] & 0xffff) != 0 || tablebits > 16) /* 16 for weight below */
56 gzip_error ("Bad table\n");
58 jutbits = 16 - tablebits;
59 @@ -161,15 +166,15 @@
61 i = start[tablebits + 1] >> jutbits;
62 if (i != 0) {
63 - k = 1 << tablebits;
64 - while (i != k) table[i++] = 0;
65 + k = MIN(1 << tablebits, DIST_BUFSIZE);
66 + while (i < k) table[i++] = 0;
67 }
69 avail = nchar;
70 mask = (unsigned) 1 << (15 - tablebits);
71 for (ch = 0; ch < (unsigned)nchar; ch++) {
72 if ((len = bitlen[ch]) == 0) continue;
73 - nextcode = start[len] + weight[len];
74 + nextcode = MIN(start[len] + weight[len], DIST_BUFSIZE);
75 if (len <= (unsigned)tablebits) {
76 if ((unsigned) 1 << tablebits < nextcode)
77 gzip_error ("Bad table\n");
78 @@ -212,7 +217,7 @@
79 for (i = 0; i < 256; i++) pt_table[i] = c;
80 } else {
81 i = 0;
82 - while (i < n) {
83 + while (i < MIN(n,NPT)) {
84 c = bitbuf >> (BITBUFSIZ - 3);
85 if (c == 7) {
86 mask = (unsigned) 1 << (BITBUFSIZ - 1 - 3);
87 @@ -224,7 +229,7 @@
88 pt_len[i++] = c;
89 if (i == i_special) {
90 c = getbits(2);
91 - while (--c >= 0) pt_len[i++] = 0;
92 + while (--c >= 0 && i < NPT) pt_len[i++] = 0;
93 }
94 }
95 while (i < nn) pt_len[i++] = 0;
96 @@ -244,7 +249,7 @@
97 for (i = 0; i < 4096; i++) c_table[i] = c;
98 } else {
99 i = 0;
100 - while (i < n) {
101 + while (i < MIN(n,NC)) {
102 c = pt_table[bitbuf >> (BITBUFSIZ - 8)];
103 if (c >= NT) {
104 mask = (unsigned) 1 << (BITBUFSIZ - 1 - 8);
105 @@ -252,14 +257,14 @@
106 if (bitbuf & mask) c = right[c];
107 else c = left [c];
108 mask >>= 1;
109 - } while (c >= NT);
110 + } while (c >= NT && (mask || c != left[c]));
111 }
112 fillbuf((int) pt_len[c]);
113 if (c <= 2) {
114 if (c == 0) c = 1;
115 else if (c == 1) c = getbits(4) + 3;
116 else c = getbits(CBIT) + 20;
117 - while (--c >= 0) c_len[i++] = 0;
118 + while (--c >= 0 && i < NC) c_len[i++] = 0;
119 } else c_len[i++] = c - 2;
120 }
121 while (i < NC) c_len[i++] = 0;
122 @@ -288,7 +293,7 @@
123 if (bitbuf & mask) j = right[j];
124 else j = left [j];
125 mask >>= 1;
126 - } while (j >= NC);
127 + } while (j >= NC && (mask || j != left[j]));
128 }
129 fillbuf((int) c_len[j]);
130 return j;
131 @@ -305,7 +310,7 @@
132 if (bitbuf & mask) j = right[j];
133 else j = left [j];
134 mask >>= 1;
135 - } while (j >= NP);
136 + } while (j >= NP && (mask || j != left[j]));
137 }
138 fillbuf((int) pt_len[j]);
139 if (j != 0) j = ((unsigned) 1 << (j - 1)) + getbits((int) (j - 1));
140 @@ -352,7 +357,7 @@
141 while (--j >= 0) {
142 buffer[r] = buffer[i];
143 i = (i + 1) & (DICSIZ - 1);
144 - if (++r == count) return r;
145 + if (++r >= count) return r;
146 }
147 for ( ; ; ) {
148 c = decode_c();
149 @@ -362,14 +367,14 @@
150 }
151 if (c <= UCHAR_MAX) {
152 buffer[r] = c;
153 - if (++r == count) return r;
154 + if (++r >= count) return r;
155 } else {
156 j = c - (UCHAR_MAX + 1 - THRESHOLD);
157 i = (r - decode_p() - 1) & (DICSIZ - 1);
158 while (--j >= 0) {
159 buffer[r] = buffer[i];
160 i = (i + 1) & (DICSIZ - 1);
161 - if (++r == count) return r;
162 + if (++r >= count) return r;
163 }
164 }
165 }
166 Index: unpack.c
167 --- unpack.c.orig 2009-09-26 20:43:28 +0200
168 +++ unpack.c 2009-10-07 07:59:53 +0200
169 @@ -22,7 +22,6 @@
170 #include "gzip.h"
171 #include "crypt.h"
173 -#define MIN(a,b) ((a) <= (b) ? (a) : (b))
174 /* The arguments must not have side effects. */
176 #define MAX_BITLEN 25
177 @@ -146,7 +145,7 @@
178 /* Remember where the literals of this length start in literal[] : */
179 lit_base[len] = base;
180 /* And read the literals: */
181 - for (n = leaves[len]; n > 0; n--) {
182 + for (n = leaves[len]; n > 0 && base < LITERALS; n--) {
183 literal[base++] = (uch)get_byte();
184 }
185 }
186 @@ -182,7 +181,7 @@
187 prefixp = &prefix_len[1<<peek_bits];
188 for (len = 1; len <= peek_bits; len++) {
189 int prefixes = leaves[len] << (peek_bits-len); /* may be 0 */
190 - while (prefixes--) *--prefixp = (uch)len;
191 + while (prefixes-- && prefixp > prefix_len) *--prefixp = (uch)len;
192 }
193 /* The length of all other codes is unknown: */
194 while (prefixp > prefix_len) *--prefixp = 0;
