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| author | Brett A C Sheffield <bacs@librecast.net> | 2025-09-03 15:46:01 +0000 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2025-09-09 11:43:59 +0200 |
| commit | aeb8d48ea92e6fd50dd4f973fb8778db86fbcc9f (patch) | |
| tree | e5f0ae3c6a69e69647a8ff9fab87ab38edf0deef /tools/testing/selftests/net/Makefile | |
| parent | d67ca09ca39f9605459959004b28c56899e3bca3 (diff) | |
| download | lwn-aeb8d48ea92e6fd50dd4f973fb8778db86fbcc9f.tar.gz lwn-aeb8d48ea92e6fd50dd4f973fb8778db86fbcc9f.zip | |
selftests: net: add test for ipv6 fragmentation
Add selftest for the IPv6 fragmentation regression which affected
several stable kernels.
Commit a18dfa9925b9 ("ipv6: save dontfrag in cork") was backported to
stable without some prerequisite commits. This caused a regression when
sending IPv6 UDP packets by preventing fragmentation and instead
returning -1 (EMSGSIZE).
Add selftest to check for this issue by attempting to send a packet
larger than the interface MTU. The packet will be fragmented on a
working kernel, with sendmsg(2) correctly returning the expected number
of bytes sent. When the regression is present, sendmsg returns -1 and
sets errno to EMSGSIZE.
Link: https://lore.kernel.org/stable/aElivdUXqd1OqgMY@karahi.gladserv.com
Signed-off-by: Brett A C Sheffield <bacs@librecast.net>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250903154925.13481-1-bacs@librecast.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'tools/testing/selftests/net/Makefile')
| -rw-r--r-- | tools/testing/selftests/net/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile index 8c860782f9cd..c9d5b0339e8d 100644 --- a/tools/testing/selftests/net/Makefile +++ b/tools/testing/selftests/net/Makefile @@ -118,6 +118,7 @@ TEST_GEN_FILES += tfo TEST_PROGS += tfo_passive.sh TEST_PROGS += broadcast_pmtu.sh TEST_PROGS += ipv6_force_forwarding.sh +TEST_GEN_PROGS += ipv6_fragmentation TEST_PROGS += route_hint.sh # YNL files, must be before "include ..lib.mk" |