History log of /src/tests/net/bpf/
Revision (<<< Hide revision tags) (Show revision tags >>>) Date Author Comments
Revision tags: perseant-exfatfs-base-20250801 perseant-exfatfs-base-20240630 perseant-exfatfs-base cjep_sun2x-base cjep_staticlib_x-base1 cjep_staticlib_x-base phil-wifi-20200421 phil-wifi-20200411 phil-wifi-20200406 pgoyette-compat-merge-20190127 pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906 pgoyette-compat-0728 pgoyette-compat-0625 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base perseant-stdc-iso10646-base prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 pgoyette-localcount-20170320 bouyer-socketcan-base pgoyette-localcount-20170107 pgoyette-localcount-20161104 localcount-20160914 pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base yamt-pagecache-base9 yamt-pagecache-tag8 tls-earlyentropy-base riastradh-xf86-video-intel-2-7-1-pre-2-21-15 riastradh-drm2-base3 agc-symver-base tls-maxphys-base yamt-pagecache-base8 yamt-pagecache-base7 yamt-pagecache-base6 yamt-pagecache-base5 yamt-pagecache-base4 yamt-pagecache-base3 yamt-pagecache-base2 yamt-pagecache-base bouyer-quota2-nbase bouyer-quota2-base
1.2 13-Jul-2010 jmmv

Get rid of static Atffiles and let bsd.test.mk generate them on the fly.


1.1 21-Apr-2010 pooka

Check that bpf doesn't accept programs with divide-by-zero in them.
Example filter from Guy Harris via PR kern/43185.


1.7 18-Sep-2025 mrg

introduce a couple of new turn-off-gcc-warning variables and use them.

GCC 14 has a new annoying calloc() checker that we turn off in a bunch
of places, and there are a few more dangling-pointer issuse that come up,
but seem bogus.


Revision tags: perseant-exfatfs-base-20250801 netbsd-11-base netbsd-10-1-RELEASE perseant-exfatfs-base-20240630 perseant-exfatfs-base netbsd-10-0-RELEASE netbsd-10-0-RC6 netbsd-10-0-RC5 netbsd-10-0-RC4 netbsd-10-0-RC3 netbsd-10-0-RC2 netbsd-10-0-RC1 netbsd-10-base cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 cjep_staticlib_x-base phil-wifi-20200421 phil-wifi-20200411 is-mlppp-base phil-wifi-20200406
1.6 01-Mar-2020 christos

Centralize the base rump libraries into a variable used by all the other
Makefiles so that we can make changes to it centrally as needed and have
less mess. Fixes the sun2 build that needs rumpvfs after librump after
the latest changes.


Revision tags: netbsd-8-3-RELEASE netbsd-9-4-RELEASE netbsd-9-3-RELEASE netbsd-9-2-RELEASE netbsd-9-1-RELEASE netbsd-8-2-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-merge-20190127 pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906 netbsd-7-2-RELEASE pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 netbsd-7-1-2-RELEASE pgoyette-compat-base netbsd-7-1-1-RELEASE matt-nb8-mediatek-base perseant-stdc-iso10646-base netbsd-8-base prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 pgoyette-localcount-20170320 netbsd-7-1-RELEASE netbsd-7-1-RC2 netbsd-7-nhusb-base-20170116 bouyer-socketcan-base pgoyette-localcount-20170107 netbsd-7-1-RC1 pgoyette-localcount-20161104 netbsd-7-0-2-RELEASE localcount-20160914 netbsd-7-nhusb-base pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base netbsd-7-0-1-RELEASE netbsd-7-0-RELEASE netbsd-7-0-RC3 netbsd-7-0-RC2 netbsd-7-0-RC1 netbsd-7-base tls-earlyentropy-base tls-maxphys-base
1.5 07-Jul-2014 alnsn

branches: 1.5.24;
Add bpf/t_mbuf test to the build.


1.4 10-Jun-2014 he

Fix static linking for the tests: -lrump is also used by -lrumpuser,
so we also need -lrump after -lrumpuser. Fixes build for sun2.


Revision tags: netbsd-6-0-6-RELEASE netbsd-6-1-5-RELEASE yamt-pagecache-base9 yamt-pagecache-tag8 netbsd-6-1-4-RELEASE netbsd-6-0-5-RELEASE riastradh-xf86-video-intel-2-7-1-pre-2-21-15 riastradh-drm2-base3 netbsd-6-1-3-RELEASE netbsd-6-0-4-RELEASE netbsd-6-1-2-RELEASE netbsd-6-0-3-RELEASE netbsd-6-1-1-RELEASE riastradh-drm2-base2 riastradh-drm2-base1 riastradh-drm2-base netbsd-6-0-2-RELEASE netbsd-6-1-RELEASE netbsd-6-1-RC4 netbsd-6-1-RC3 agc-symver-base netbsd-6-1-RC2 netbsd-6-1-RC1 yamt-pagecache-base8 netbsd-6-0-1-RELEASE yamt-pagecache-base7 matt-nb6-plus-nbase yamt-pagecache-base6 netbsd-6-0-RELEASE netbsd-6-0-RC2 matt-nb6-plus-base netbsd-6-0-RC1 yamt-pagecache-base5 yamt-pagecache-base4 netbsd-6-base yamt-pagecache-base3 yamt-pagecache-base2 yamt-pagecache-base cherry-xenmp-base bouyer-quota2-nbase bouyer-quota2-base
1.3 03-Jan-2011 christos

branches: 1.3.12; 1.3.22;
PR/44310: Alexander Nasonov: write to /dev/bpf truncates size_t to int


Revision tags: matt-mips64-premerge-20101231
1.2 06-Dec-2010 pooka

Add an xfail test for the mbuf leak described in PR kern/44196.

This is yet another example of a simple test which would be much
trickier to execute against the host kernel. You would either need
to put networking in a complete lockdown, or do some "statistical"
methods where you trigger the bug many many times and attempt to
ascertain a rising trend in mbuf count. And, of course, the leaked
mbufs don't go away from the host kernel once the test ends. In
contrast, we *know* that there is no other networking activity in
a rump kernel, so we can execute the operation exactly once, plus
the leaked mbuf "disappears" when the test is done.


1.1 21-Apr-2010 pooka

Check that bpf doesn't accept programs with divide-by-zero in them.
Example filter from Guy Harris via PR kern/43185.


Revision tags: perseant-exfatfs-base-20250801 netbsd-11-base netbsd-10-1-RELEASE perseant-exfatfs-base-20240630 perseant-exfatfs-base netbsd-8-3-RELEASE netbsd-9-4-RELEASE netbsd-10-0-RELEASE netbsd-10-0-RC6 netbsd-10-0-RC5 netbsd-10-0-RC4 netbsd-10-0-RC3 netbsd-10-0-RC2 netbsd-10-0-RC1 netbsd-10-base netbsd-9-3-RELEASE cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 netbsd-9-2-RELEASE cjep_staticlib_x-base netbsd-9-1-RELEASE phil-wifi-20200421 phil-wifi-20200411 is-mlppp-base phil-wifi-20200406 netbsd-8-2-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-merge-20190127 pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906 netbsd-7-2-RELEASE pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 netbsd-7-1-2-RELEASE pgoyette-compat-base netbsd-7-1-1-RELEASE matt-nb8-mediatek-base perseant-stdc-iso10646-base netbsd-8-base prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 pgoyette-localcount-20170320 netbsd-7-1-RELEASE netbsd-7-1-RC2 netbsd-7-nhusb-base-20170116 bouyer-socketcan-base pgoyette-localcount-20170107 netbsd-7-1-RC1 pgoyette-localcount-20161104 netbsd-7-0-2-RELEASE localcount-20160914 netbsd-7-nhusb-base pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base netbsd-7-0-1-RELEASE netbsd-7-0-RELEASE netbsd-7-0-RC3 netbsd-7-0-RC2 netbsd-7-0-RC1 tls-maxphys-base netbsd-7-base tls-earlyentropy-base
1.2 08-Jul-2014 alnsn

branches: 1.2.2; 1.2.6;
Clone libbpfjit tests to check kernel implementation of bpfjit.
Old content of t_bpfjit.c will be moved to t_mbuf.c shortly.
Change packet buffers to unsigned char[] type.


1.1 07-Jul-2014 alnsn

Add some helper functions for bpf/bpfjit rump tests.


Revision tags: perseant-exfatfs-base-20250801 netbsd-11-base netbsd-10-1-RELEASE perseant-exfatfs-base-20240630 perseant-exfatfs-base netbsd-10-0-RELEASE netbsd-10-0-RC6 netbsd-10-0-RC5 netbsd-10-0-RC4 netbsd-10-0-RC3 netbsd-10-0-RC2 netbsd-10-0-RC1 netbsd-10-base
1.9 10-Sep-2022 rillig

fix misspellings of 'available' and nearby typos


Revision tags: netbsd-8-3-RELEASE netbsd-9-4-RELEASE netbsd-9-3-RELEASE cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 netbsd-9-2-RELEASE cjep_staticlib_x-base netbsd-9-1-RELEASE phil-wifi-20200421 phil-wifi-20200411 is-mlppp-base phil-wifi-20200406 netbsd-8-2-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-merge-20190127 pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906 pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base matt-nb8-mediatek-base perseant-stdc-iso10646-base netbsd-8-base prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 pgoyette-localcount-20170320
1.8 09-Feb-2017 ozaki-r

Add tests for several bpf ioctls


1.7 01-Feb-2017 ozaki-r

Add a test case for BIOCGBLEN and BIOCSBLEN


Revision tags: bouyer-socketcan-base
1.6 13-Jan-2017 christos

branches: 1.6.2;
Don't play with "../.." in includes for h_macros.h; deal with it centrally.
Minor fixes.


Revision tags: netbsd-7-2-RELEASE netbsd-7-1-2-RELEASE netbsd-7-1-1-RELEASE netbsd-7-1-RELEASE netbsd-7-1-RC2 netbsd-7-nhusb-base-20170116 pgoyette-localcount-20170107 netbsd-7-1-RC1 pgoyette-localcount-20161104 netbsd-7-0-2-RELEASE localcount-20160914 netbsd-7-nhusb-base pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base netbsd-7-0-1-RELEASE netbsd-7-0-RELEASE netbsd-7-0-RC3 netbsd-7-0-RC2 netbsd-7-0-RC1 netbsd-7-base yamt-pagecache-base9 tls-earlyentropy-base riastradh-xf86-video-intel-2-7-1-pre-2-21-15 riastradh-drm2-base3 riastradh-drm2-base2 riastradh-drm2-base1 riastradh-drm2-base agc-symver-base yamt-pagecache-base8 yamt-pagecache-base7 yamt-pagecache-base6 tls-maxphys-base
1.5 14-Aug-2012 alnsn

branches: 1.5.14;
Add __RCSID and and make a couple of stylistic changes.


Revision tags: netbsd-6-0-6-RELEASE netbsd-6-1-5-RELEASE netbsd-6-1-4-RELEASE netbsd-6-0-5-RELEASE netbsd-6-1-3-RELEASE netbsd-6-0-4-RELEASE netbsd-6-1-2-RELEASE netbsd-6-0-3-RELEASE netbsd-6-1-1-RELEASE netbsd-6-0-2-RELEASE netbsd-6-1-RELEASE netbsd-6-1-RC4 netbsd-6-1-RC3 netbsd-6-1-RC2 netbsd-6-1-RC1 netbsd-6-0-1-RELEASE matt-nb6-plus-nbase netbsd-6-0-RELEASE netbsd-6-0-RC2 matt-nb6-plus-base netbsd-6-0-RC1 yamt-pagecache-base5 yamt-pagecache-base4 netbsd-6-base
1.4 13-Jan-2012 christos

PR/44196 is now fixed, so don't expect a failure.


1.3 18-Dec-2011 joerg

Remove unused variable


Revision tags: yamt-pagecache-base3 yamt-pagecache-base2 yamt-pagecache-base cherry-xenmp-base bouyer-quota2-nbase bouyer-quota2-base
1.2 03-Jan-2011 christos

branches: 1.2.6;
PR/44310: Alexander Nasonov: write to /dev/bpf truncates size_t to int


Revision tags: matt-mips64-premerge-20101231
1.1 06-Dec-2010 pooka

Add an xfail test for the mbuf leak described in PR kern/44196.

This is yet another example of a simple test which would be much
trickier to execute against the host kernel. You would either need
to put networking in a complete lockdown, or do some "statistical"
methods where you trigger the bug many many times and attempt to
ascertain a rising trend in mbuf count. And, of course, the leaked
mbufs don't go away from the host kernel once the test ends. In
contrast, we *know* that there is no other networking activity in
a rump kernel, so we can execute the operation exactly once, plus
the leaked mbuf "disappears" when the test is done.


Revision tags: perseant-exfatfs-base-20250801 netbsd-11-base netbsd-10-1-RELEASE perseant-exfatfs-base-20240630 perseant-exfatfs-base netbsd-8-3-RELEASE netbsd-9-4-RELEASE netbsd-10-0-RELEASE netbsd-10-0-RC6 netbsd-10-0-RC5 netbsd-10-0-RC4 netbsd-10-0-RC3 netbsd-10-0-RC2 netbsd-10-0-RC1 netbsd-10-base netbsd-9-3-RELEASE cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 netbsd-9-2-RELEASE cjep_staticlib_x-base netbsd-9-1-RELEASE phil-wifi-20200421 phil-wifi-20200411 is-mlppp-base phil-wifi-20200406 netbsd-8-2-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-merge-20190127 pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906 netbsd-7-2-RELEASE pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 netbsd-7-1-2-RELEASE pgoyette-compat-base netbsd-7-1-1-RELEASE matt-nb8-mediatek-base perseant-stdc-iso10646-base netbsd-8-base prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 pgoyette-localcount-20170320 netbsd-7-1-RELEASE netbsd-7-1-RC2 netbsd-7-nhusb-base-20170116 bouyer-socketcan-base pgoyette-localcount-20170107 netbsd-7-1-RC1 pgoyette-localcount-20161104 netbsd-7-0-2-RELEASE localcount-20160914 netbsd-7-nhusb-base pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base netbsd-7-0-1-RELEASE netbsd-7-0-RELEASE netbsd-7-0-RC3 netbsd-7-0-RC2 netbsd-7-0-RC1 netbsd-7-base yamt-pagecache-base9 tls-earlyentropy-base riastradh-xf86-video-intel-2-7-1-pre-2-21-15 riastradh-drm2-base3 riastradh-drm2-base2 riastradh-drm2-base1 riastradh-drm2-base agc-symver-base tls-maxphys-base
1.4 01-Mar-2013 pooka

Rump kernel hypercalls are not necessary here.


Revision tags: netbsd-6-0-6-RELEASE netbsd-6-1-5-RELEASE yamt-pagecache-tag8 netbsd-6-1-4-RELEASE netbsd-6-0-5-RELEASE netbsd-6-1-3-RELEASE netbsd-6-0-4-RELEASE netbsd-6-1-2-RELEASE netbsd-6-0-3-RELEASE netbsd-6-1-1-RELEASE netbsd-6-0-2-RELEASE netbsd-6-1-RELEASE netbsd-6-1-RC4 netbsd-6-1-RC3 netbsd-6-1-RC2 netbsd-6-1-RC1 yamt-pagecache-base8 netbsd-6-0-1-RELEASE yamt-pagecache-base7 matt-nb6-plus-nbase yamt-pagecache-base6 netbsd-6-0-RELEASE netbsd-6-0-RC2 matt-nb6-plus-base netbsd-6-0-RC1 yamt-pagecache-base5 yamt-pagecache-base4 netbsd-6-base yamt-pagecache-base3 yamt-pagecache-base2 yamt-pagecache-base cherry-xenmp-base bouyer-quota2-nbase bouyer-quota2-base matt-mips64-premerge-20101231
1.3 03-Nov-2010 christos

branches: 1.3.6; 1.3.12;
add Makefile.inc everywhere so that we can set WARNS=4 by default. Amazing
how many bugs this found :-)


1.2 21-Apr-2010 pooka

Add bpf program source in a comment.


1.1 21-Apr-2010 pooka

Check that bpf doesn't accept programs with divide-by-zero in them.
Example filter from Guy Harris via PR kern/43185.


Revision tags: perseant-exfatfs-base-20250801 netbsd-11-base netbsd-10-1-RELEASE perseant-exfatfs-base-20240630 perseant-exfatfs-base netbsd-8-3-RELEASE netbsd-9-4-RELEASE netbsd-10-0-RELEASE netbsd-10-0-RC6 netbsd-10-0-RC5 netbsd-10-0-RC4 netbsd-10-0-RC3 netbsd-10-0-RC2 netbsd-10-0-RC1 netbsd-10-base netbsd-9-3-RELEASE cjep_sun2x-base1 cjep_sun2x-base cjep_staticlib_x-base1 netbsd-9-2-RELEASE cjep_staticlib_x-base netbsd-9-1-RELEASE phil-wifi-20200421 phil-wifi-20200411 is-mlppp-base phil-wifi-20200406 netbsd-8-2-RELEASE netbsd-9-0-RELEASE netbsd-9-0-RC2 netbsd-9-0-RC1 phil-wifi-20191119 netbsd-9-base phil-wifi-20190609 netbsd-8-1-RELEASE netbsd-8-1-RC1 pgoyette-compat-merge-20190127 pgoyette-compat-20190127 pgoyette-compat-20190118 pgoyette-compat-1226 pgoyette-compat-1126 pgoyette-compat-1020 pgoyette-compat-0930 pgoyette-compat-0906 pgoyette-compat-0728 netbsd-8-0-RELEASE phil-wifi-base pgoyette-compat-0625 netbsd-8-0-RC2 pgoyette-compat-0521 pgoyette-compat-0502 pgoyette-compat-0422 netbsd-8-0-RC1 pgoyette-compat-0415 pgoyette-compat-0407 pgoyette-compat-0330 pgoyette-compat-0322 pgoyette-compat-0315 pgoyette-compat-base matt-nb8-mediatek-base perseant-stdc-iso10646-base netbsd-8-base prg-localcount2-base3 prg-localcount2-base2 prg-localcount2-base1 prg-localcount2-base pgoyette-localcount-20170426 bouyer-socketcan-base1 pgoyette-localcount-20170320 bouyer-socketcan-base
1.3 13-Jan-2017 christos

Don't play with "../.." in includes for h_macros.h; deal with it centrally.
Minor fixes.


Revision tags: netbsd-7-2-RELEASE netbsd-7-1-2-RELEASE netbsd-7-1-1-RELEASE netbsd-7-1-RELEASE netbsd-7-1-RC2 netbsd-7-nhusb-base-20170116 pgoyette-localcount-20170107 netbsd-7-1-RC1 pgoyette-localcount-20161104 netbsd-7-0-2-RELEASE localcount-20160914 netbsd-7-nhusb-base pgoyette-localcount-20160806 pgoyette-localcount-20160726 pgoyette-localcount-base netbsd-7-0-1-RELEASE netbsd-7-0-RELEASE netbsd-7-0-RC3 netbsd-7-0-RC2 netbsd-7-0-RC1 tls-maxphys-base netbsd-7-base tls-earlyentropy-base
1.2 08-Jul-2014 alnsn

branches: 1.2.2; 1.2.6; 1.2.10;
Clone libbpfjit tests to check kernel implementation of bpfjit.
Old content of t_bpfjit.c will be moved to t_mbuf.c shortly.
Change packet buffers to unsigned char[] type.


1.1 07-Jul-2014 alnsn

Add rump tests for checking how bpf_validate() works with mbuf chains.