strace/tests/nlattr_ndtmsg.c
Eugene Syromyatnikov 346e8002b0 tests: introduce midtail_alloc and use it in netlink tests
netlink tests happen to access memory located before the tail_malloc'ed
pointers, a practice that doesn't go well with the latest compilers
because tail_malloc is marked with ATTRIBUTE_MALLOC.
For example, glibc in -D_FORTIFY_SOURCE=2 mode and gcc 8 with
-Warray-bounds enabled complain about negative offsets out of bounds.
Fix this issue by introducing midtail_alloc.

* tests/tests.h (midtail_alloc): New macro.
* tests/netlink_crypto.c: Use it instead of tail_malloc for nlh0 allocation.
* tests/netlink_netfilter.c: Likewise.
* tests/netlink_protocol.c: Likewise.
* tests/netlink_route.c: Likewise.
* tests/netlink_selinux.c: Likewise.
* tests/netlink_sock_diag.c: Likewise.
* tests/nlattr_br_port_msg.c: Likewise.
* tests/nlattr_crypto_user_alg.c: Likewise.
* tests/nlattr_dcbmsg.c: Likewise.
* tests/nlattr_fib_rule_hdr.c: Likewise.
* tests/nlattr_ifaddrlblmsg.c: Likewise.
* tests/nlattr_ifaddrmsg.c: Likewise.
* tests/nlattr_ifinfomsg.c: Likewise.
* tests/nlattr_ifla_brport.c: Likewise.
* tests/nlattr_ifla_port.c: Likewise.
* tests/nlattr_ifla_xdp.c: Likewise.
* tests/nlattr_inet_diag_msg.c: Likewise.
* tests/nlattr_inet_diag_req_compat.c: Likewise.
* tests/nlattr_inet_diag_req_v2.c: Likewise.
* tests/nlattr_mdba_mdb_entry.c: Likewise.
* tests/nlattr_mdba_router_port.c: Likewise.
* tests/nlattr_ndmsg.c: Likewise.
* tests/nlattr_ndtmsg.c: Likewise.
* tests/nlattr_netconfmsg.c: Likewise.
* tests/nlattr_netlink_diag_msg.c: Likewise.
* tests/nlattr_nlmsgerr.c: Likewise.
* tests/nlattr_packet_diag_msg.c: Likewise.
* tests/nlattr_rtgenmsg.c: Likewise.
* tests/nlattr_rtmsg.c: Likewise.
* tests/nlattr_smc_diag_msg.c: Likewise.
* tests/nlattr_tc_stats.c: Likewise.
* tests/nlattr_tca_stab.c: Likewise.
* tests/nlattr_tcamsg.c: Likewise.
* tests/nlattr_tcmsg.c: Likewise.
* tests/nlattr_unix_diag_msg.c: Likewise.

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
2018-05-09 22:01:45 +00:00

160 lines
5.5 KiB
C

/*
* Copyright (c) 2017 JingPiao Chen <chenjingpiao@gmail.com>
* Copyright (c) 2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "tests.h"
#include <stdio.h>
#include "test_nlattr.h"
#ifdef HAVE_LINUX_NEIGHBOUR_H
# include <linux/neighbour.h>
#endif
#include <linux/rtnetlink.h>
#define NDTA_PARMS 6
#define NDTPA_IFINDEX 1
static void
init_ndtmsg(struct nlmsghdr *const nlh, const unsigned int msg_len)
{
SET_STRUCT(struct nlmsghdr, nlh,
.nlmsg_len = msg_len,
.nlmsg_type = RTM_GETNEIGHTBL,
.nlmsg_flags = NLM_F_DUMP
);
struct ndtmsg *const msg = NLMSG_DATA(nlh);
SET_STRUCT(struct ndtmsg, msg,
.ndtm_family = AF_NETLINK
);
}
static void
print_ndtmsg(const unsigned int msg_len)
{
printf("{len=%u, type=RTM_GETNEIGHTBL, flags=NLM_F_DUMP"
", seq=0, pid=0}, {ndtm_family=AF_NETLINK}",
msg_len);
}
int
main(void)
{
skip_if_unavailable("/proc/self/fd/");
const int fd = create_nl_socket(NETLINK_ROUTE);
const unsigned int hdrlen = sizeof(struct ndtmsg);
void *nlh0 = midtail_alloc(NLMSG_SPACE(hdrlen), NLA_HDRLEN + 11 * 8);
static char pattern[4096];
fill_memory_ex(pattern, sizeof(pattern), 'a', 'z' - 'a' + 1);
const unsigned int nla_type = 0xffff & NLA_TYPE_MASK;
char nla_type_str[256];
sprintf(nla_type_str, "%#x /* NDTA_??? */", nla_type);
TEST_NLATTR_(fd, nlh0, hdrlen,
init_ndtmsg, print_ndtmsg,
nla_type, nla_type_str,
4, pattern, 4,
print_quoted_hex(pattern, 4));
#ifdef HAVE_STRUCT_NDT_CONFIG
static const struct ndt_config ndtc = {
.ndtc_key_len = 0xabcd,
.ndtc_entry_size = 0xbcda,
.ndtc_entries = 0xcdabedad,
.ndtc_last_flush = 0xdebaedba,
.ndtc_last_rand = 0xedadedab,
.ndtc_hash_rnd = 0xfeadedaf,
.ndtc_hash_mask = 0xadbcdead,
.ndtc_hash_chain_gc = 0xbdaedacd,
.ndtc_proxy_qlen = 0xcdeaedab
};
TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
init_ndtmsg, print_ndtmsg,
NDTA_CONFIG, pattern, ndtc,
PRINT_FIELD_U("{", ndtc, ndtc_key_len);
PRINT_FIELD_U(", ", ndtc, ndtc_entry_size);
PRINT_FIELD_U(", ", ndtc, ndtc_entries);
PRINT_FIELD_U(", ", ndtc, ndtc_last_flush);
PRINT_FIELD_U(", ", ndtc, ndtc_last_rand);
PRINT_FIELD_U(", ", ndtc, ndtc_hash_rnd);
PRINT_FIELD_0X(", ", ndtc, ndtc_hash_mask);
PRINT_FIELD_U(", ", ndtc, ndtc_hash_chain_gc);
PRINT_FIELD_U(", ", ndtc, ndtc_proxy_qlen);
printf("}"));
#endif /* HAVE_STRUCT_NDT_CONFIG */
static const struct nlattr nla = {
.nla_len = sizeof(nla),
.nla_type = NDTPA_IFINDEX
};
TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
init_ndtmsg, print_ndtmsg,
NDTA_PARMS, pattern, nla,
PRINT_FIELD_U("{", nla, nla_len);
printf(", nla_type=NDTPA_IFINDEX}"));
#ifdef HAVE_STRUCT_NDT_STATS
static const struct ndt_stats ndtst = {
.ndts_allocs = 0xabcdedabedadedfa,
.ndts_destroys = 0xbcdefabefacdbaad,
.ndts_hash_grows = 0xcdbadefacdcbaede,
.ndts_res_failed = 0xdedbaecfdbcadcfe,
.ndts_lookups = 0xedfafdedbdadedec,
.ndts_hits = 0xfebdeadebcddeade,
.ndts_rcv_probes_mcast = 0xadebfeadecddeafe,
.ndts_rcv_probes_ucast = 0xbcdefeacdadecdfe,
.ndts_periodic_gc_runs = 0xedffeadedeffbecc,
.ndts_forced_gc_runs = 0xfeefefeabedeedcd,
#ifdef HAVE_STRUCT_NDT_STATS_NDTS_TABLE_FULLS
.ndts_table_fulls = 0xadebfefaecdfeade
#endif /* HAVE_STRUCT_NDT_STATS_NDTS_TABLE_FULLS */
};
TEST_NLATTR_OBJECT(fd, nlh0, hdrlen,
init_ndtmsg, print_ndtmsg,
NDTA_STATS, pattern, ndtst,
PRINT_FIELD_U("{", ndtst, ndts_allocs);
PRINT_FIELD_U(", ", ndtst, ndts_destroys);
PRINT_FIELD_U(", ", ndtst, ndts_hash_grows);
PRINT_FIELD_U(", ", ndtst, ndts_res_failed);
PRINT_FIELD_U(", ", ndtst, ndts_lookups);
PRINT_FIELD_U(", ", ndtst, ndts_hits);
PRINT_FIELD_U(", ", ndtst, ndts_rcv_probes_mcast);
PRINT_FIELD_U(", ", ndtst, ndts_rcv_probes_ucast);
PRINT_FIELD_U(", ", ndtst, ndts_periodic_gc_runs);
PRINT_FIELD_U(", ", ndtst, ndts_forced_gc_runs);
#ifdef HAVE_STRUCT_NDT_STATS_NDTS_TABLE_FULLS
PRINT_FIELD_U(", ", ndtst, ndts_table_fulls);
#endif /* HAVE_STRUCT_NDT_STATS_NDTS_TABLE_FULLS */
printf("}"));
#endif /* HAVE_STRUCT_NDT_STATS */
puts("+++ exited with 0 +++");
return 0;
}