scsi: pvscsi: check command descriptor ring buffer size (CVE-2016-4952)
[qemu.git] / util / hexdump.c
1 /*
2 * Helper to hexdump a buffer
3 *
4 * Copyright (c) 2013 Red Hat, Inc.
5 * Copyright (c) 2013 Gerd Hoffmann <kraxel@redhat.com>
6 * Copyright (c) 2013 Peter Crosthwaite <peter.crosthwaite@xilinx.com>
7 * Copyright (c) 2013 Xilinx, Inc
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * GNU GPL, version 2 or (at your option) any later version.
14 */
15
16 #include "qemu/osdep.h"
17 #include "qemu-common.h"
18
19 void qemu_hexdump(const char *buf, FILE *fp, const char *prefix, size_t size)
20 {
21 unsigned int b, len, i, c;
22
23 for (b = 0; b < size; b += 16) {
24 len = size - b;
25 if (len > 16) {
26 len = 16;
27 }
28 fprintf(fp, "%s: %04x:", prefix, b);
29 for (i = 0; i < 16; i++) {
30 if ((i % 4) == 0) {
31 fprintf(fp, " ");
32 }
33 if (i < len) {
34 fprintf(fp, " %02x", (unsigned char)buf[b + i]);
35 } else {
36 fprintf(fp, " ");
37 }
38 }
39 fprintf(fp, " ");
40 for (i = 0; i < len; i++) {
41 c = buf[b + i];
42 if (c < ' ' || c > '~') {
43 c = '.';
44 }
45 fprintf(fp, "%c", c);
46 }
47 fprintf(fp, "\n");
48 }
49 }