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https://gitlab.isc.org/isc-projects/dhcp
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[master] Fixed relative file name crash
Merges in rt46957
This commit is contained in:
Thomas Markwalder
parent
d394b602d4
commit
db4e4aa2e4
7
RELNOTES
7
RELNOTES
@ -103,6 +103,13 @@ by Eric Young (eay@cryptsoft.com).
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cannot rely on the results of executable statements.
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[ISC-Bugs #45451]
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- Fixed a bug which causes dhcpd and dhclient to crash on certain
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systems when given relative path names for lease or pid files on
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the command line. Affected systems are those on which the C library
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function, realpath() does not support a second parameter value of
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NULL (see manpages for realpath(3)).
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[ISC-Bugs #46957]
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Changes since 4.4.0a1 (New Features)
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- Added experimental support for relay port (draft-ietf-dhc-relay-port-10.txt)
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@ -639,17 +639,11 @@ main(int argc, char **argv) {
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* to be reopened after chdir() has been called
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*/
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if (path_dhclient_db[0] != '/') {
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const char *old_path = path_dhclient_db;
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path_dhclient_db = realpath(path_dhclient_db, NULL);
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if (path_dhclient_db == NULL)
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log_fatal("Failed to get realpath for %s: %s", old_path, strerror(errno));
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path_dhclient_db = absolute_path(path_dhclient_db);
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}
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if (path_dhclient_script[0] != '/') {
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const char *old_path = path_dhclient_script;
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path_dhclient_script = realpath(path_dhclient_script, NULL);
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if (path_dhclient_script == NULL)
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log_fatal("Failed to get realpath for %s: %s", old_path, strerror(errno));
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path_dhclient_script = absolute_path(path_dhclient_script);
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}
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/*
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@ -3,7 +3,7 @@
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Turn data structures into printable text. */
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/*
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* Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 2004-2018 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1995-2003 by Internet Software Consortium
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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@ -132,7 +132,7 @@ char *print_base64 (const unsigned char *buf, unsigned len,
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b = dmalloc (bl + 1, file, line);
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if (!b)
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return (char *)0;
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i = 0;
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s = b;
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while (i != len) {
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@ -199,15 +199,15 @@ void print_lease (lease)
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log_debug (" Lease %s",
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piaddr (lease -> ip_addr));
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t = gmtime (&lease -> starts);
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strftime (tbuf, sizeof tbuf, "%Y/%m/%d %H:%M:%S", t);
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log_debug (" start %s", tbuf);
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t = gmtime (&lease -> ends);
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strftime (tbuf, sizeof tbuf, "%Y/%m/%d %H:%M:%S", t);
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log_debug (" end %s", tbuf);
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if (lease -> hardware_addr.hlen)
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log_debug (" hardware addr = %s",
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print_hw_addr (lease -> hardware_addr.hbuf [0],
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@ -215,7 +215,7 @@ void print_lease (lease)
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&lease -> hardware_addr.hbuf [1]));
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log_debug (" host %s ",
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lease -> host ? lease -> host -> name : "<none>");
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}
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}
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#if defined (DEBUG_PACKET)
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void dump_packet_option (struct option_cache *oc,
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@ -301,7 +301,7 @@ void dump_raw (buf, len)
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/*
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1 2 3 4 5 6 7
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01234567890123456789012345678901234567890123456789012345678901234567890123
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280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .................
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280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .................
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*/
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memset(lbuf, ' ', 79);
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@ -446,7 +446,7 @@ void print_hex_or_string (len, data, limit, buf)
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/*
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* print a string as either hex or text
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* using static buffers to hold the output
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*
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*
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* len - length of data
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* data - input data
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* limit - length of buf
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@ -499,7 +499,7 @@ char *print_dotted_quads (len, data)
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char *s;
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s = &dq_buf [0];
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i = 0;
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/* %Audit% Loop bounds checks to 21 bytes. %2004.06.17,Safe%
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@ -554,7 +554,7 @@ static unsigned print_subexpression (expr, buf, len)
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return 3;
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}
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break;
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case expr_match:
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if (len > 7) {
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strcpy (buf, "(match)");
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@ -772,7 +772,7 @@ static unsigned print_subexpression (expr, buf, len)
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case expr_binary_xor:
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s = "^";
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goto binop;
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case expr_not:
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if (len > 6) {
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rv = 5;
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@ -1179,7 +1179,7 @@ void print_expression (name, expr)
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}
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int token_print_indent_concat (FILE *file, int col, int indent,
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const char *prefix,
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const char *prefix,
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const char *suffix, ...)
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{
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va_list list;
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@ -1209,7 +1209,7 @@ int token_print_indent_concat (FILE *file, int col, int indent,
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s = va_arg (list, char *);
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}
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va_end (list);
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col = token_print_indent (file, col, indent,
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prefix, suffix, t);
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dfree (t, MDL);
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@ -1439,3 +1439,43 @@ char *format_lease_id(const unsigned char *s, unsigned len,
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}
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return (idstr);
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}
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/*
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* Convert a relative path name to an absolute path name
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*
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* Not all versions of realpath() support NULL for
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* the second parameter and PATH_MAX isn't defined
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* on all systems. For the latter, we'll make what
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* ought to be a big enough buffer and let it fly.
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* If passed an absolute path it should return it
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* an allocated buffer.
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*/
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char *absolute_path(const char *orgpath) {
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char *abspath = NULL;
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if (orgpath) {
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#ifdef PATH_MAX
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char buf[PATH_MAX];
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#else
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char buf[2048];
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int len;
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#endif
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errno = 0;
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if (realpath(orgpath, buf) == NULL) {
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const char* errmsg = strerror(errno);
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log_fatal("Failed to get realpath for %s: %s",
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orgpath, errmsg);
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}
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/* dup the result into an allocated buffer */
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abspath = dmalloc(strlen(buf) + 1, MDL);
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if (abspath == NULL) {
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log_fatal("No memory for filename:%s\n",
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buf);
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}
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memcpy (abspath, buf, strlen(buf));
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abspath[strlen(buf)] = 0x0;
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}
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return (abspath);
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}
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@ -2635,6 +2635,7 @@ char *buf_to_hex (const unsigned char *s, unsigned len,
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const char *file, int line);
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char *format_lease_id(const unsigned char *s, unsigned len, int format,
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const char *file, int line);
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char *absolute_path(const char *orgpath);
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/* socket.c */
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#if defined (USE_SOCKET_SEND) || defined (USE_SOCKET_RECEIVE) \
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|| defined (USE_SOCKET_FALLBACK)
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@ -607,11 +607,7 @@ main(int argc, char **argv) {
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* to be reopened after chdir() has been called
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*/
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if (have_dhcpd_db && path_dhcpd_db[0] != '/') {
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const char *path = path_dhcpd_db;
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path_dhcpd_db = realpath(path_dhcpd_db, NULL);
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if (path_dhcpd_db == NULL)
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log_fatal("Failed to get realpath for %s: %s", path,
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strerror(errno));
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path_dhcpd_db = absolute_path(path_dhcpd_db);
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}
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if (!quiet) {
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