common: Ignore "si.valid" outside of _MAX_SYSINFO_TYPE
Limit the range from 0 to (_MAX_SYSINFO_TYPE - 1) instead of 0 to 31. This way we will never access the lchan->si.buf[] out of bounds. This is only a theoretical issue though as the code filling the lchan->si.buf for the SACCH will not have valid >= _MAX_SYSINFO_TYPE. Add a small regression test to check we still schedule all SIs. Fixes: CID 1040765
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ac26607fe4
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@ -36,6 +36,7 @@ tests/agch/agch_test
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tests/paging/paging_test
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tests/cipher/cipher_test
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tests/sysmobts/sysmobts_test
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tests/misc/misc_test
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tests/testsuite
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tests/testsuite.log
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@ -75,4 +75,5 @@ AC_OUTPUT(
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tests/agch/Makefile
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tests/cipher/Makefile
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tests/sysmobts/Makefile
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tests/misc/Makefile
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Makefile)
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@ -135,7 +135,7 @@ uint8_t *lchan_sacch_get(struct gsm_lchan *lchan)
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{
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uint32_t tmp;
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for (tmp = lchan->si.last + 1; tmp != lchan->si.last; tmp = (tmp + 1) % 32) {
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for (tmp = lchan->si.last + 1; tmp != lchan->si.last; tmp = (tmp + 1) % _MAX_SYSINFO_TYPE) {
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if (lchan->si.valid & (1 << tmp)) {
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lchan->si.last = tmp;
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return lchan->si.buf[tmp];
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@ -1,4 +1,4 @@
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SUBDIRS = paging cipher sysmobts agch
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SUBDIRS = paging cipher sysmobts agch misc
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# The `:;' works around a Bash 3.2 bug when the output is not writeable.
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$(srcdir)/package.m4: $(top_srcdir)/configure.ac
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@ -0,0 +1,8 @@
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AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(OPENBSC_INCDIR)
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AM_CFLAGS = -Wall $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS)
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LDADD = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS)
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noinst_PROGRAMS = misc_test
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EXTRA_DIST = misc_test.ok
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misc_test_SOURCES = misc_test.c $(srcdir)/../stubs.c
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misc_test_LDADD = $(top_builddir)/src/common/libbts.a $(LDADD)
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@ -0,0 +1,58 @@
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/* testing misc code */
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/* (C) 2011 by Holger Hans Peter Freyther
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* (C) 2014 by sysmocom s.f.m.c. GmbH
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmo-bts/bts.h>
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#include <stdlib.h>
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#include <stdio.h>
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static void test_sacch_get(void)
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{
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struct gsm_lchan lchan;
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int i, off;
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printf("Testing lchan_sacch_get\n");
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memset(&lchan, 0, sizeof(lchan));
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/* initialize the input. */
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for (i = 1; i < _MAX_SYSINFO_TYPE; ++i) {
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lchan.si.valid |= (1 << i);
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memset(&lchan.si.buf[i], i, sizeof(lchan.si.buf[i]));
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}
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/* It will start with '1' */
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for (i = 1, off = 0; i <= 32; ++i) {
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uint8_t *data = lchan_sacch_get(&lchan);
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off = (off + 1) % _MAX_SYSINFO_TYPE;
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if (off == 0)
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off += 1;
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//printf("i=%d (%%=%d) -> data[0]=%d\n", i, off, data[0]);
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OSMO_ASSERT(data[0] == off);
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}
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}
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int main(int argc, char **argv)
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{
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test_sacch_get();
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return EXIT_SUCCESS;
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}
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@ -0,0 +1 @@
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Testing lchan_sacch_get
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@ -18,3 +18,9 @@ AT_KEYWORDS([cipher])
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cat $abs_srcdir/cipher/cipher_test.ok > expout
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AT_CHECK([$OSMO_QEMU $abs_top_builddir/tests/cipher/cipher_test], [], [expout], [ignore])
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AT_CLEANUP
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AT_SETUP([misc])
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AT_KEYWORDS([misc])
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cat $abs_srcdir/misc/misc_test.ok > expout
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AT_CHECK([$OSMO_QEMU $abs_top_builddir/tests/misc/misc_test], [], [expout], [ignore])
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AT_CLEANUP
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