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2021-02-18selftests: test multiple parallel streamsJason A. Donenfeld
In order to test ndo_start_xmit being called in parallel, explicitly add separate tests, which should all run on different cores. This should help tease out bugs associated with queueing up packets from different cores in parallel. Currently, it hasn't found those types of bugs, but given future planned work, this is a useful regression to avoid. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-11-12qemu: bump default testing versionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-11-04qemu: drop build support for rhel 8.2Jason A. Donenfeld
This reverts commit feb89cab65c6ab1a6cbeeaaeb11b1a174772cea8. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-10-29netns: check that route_me_harder packets use the right skJason A. Donenfeld
If netfilter changes the packet mark, the packet is rerouted. The ip_route_me_harder family of functions fails to use the right sk, opting to instead use skb->sk, resulting in a routing loop when used with tunnels. Fixing this inside of the compat layer with skb_orphan would work but would cause other problems, by disabling TSQ, so instead we warn if the calling kernel hasn't yet backported the fix for this. Reported-by: Chen Minqiang <ptpt52@gmail.com> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-06-22netns: workaround bad 5.2.y backportJason A. Donenfeld
ca7a03c4175 was backported to 5.2 to fix 7d9e5f422150, but 7d9e5f422150 wasn't added until 5.3, so this fix for a reference underflow in 5.3 becomes a memory leak in 5.2. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-06-22device: avoid circular netns referencesJason A. Donenfeld
Before, we took a reference to the creating netns if the new netns was different. This caused issues with circular references, with two wireguard interfaces swapping namespaces. The solution is to rather not take any extra references at all, but instead simply invalidate the creating netns pointer when that netns is deleted. In order to prevent this from happening again, this commit improves the rough object leak tracking by allowing it to account for created and destroyed interfaces, aside from just peers and keys. That then makes it possible to check for the object leak when having two interfaces take a reference to each others' namespaces. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-28qemu: mark per_cpu_load_addr as static for gcc-10Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-28qemu: work around broken centos8 kernelJason A. Donenfeld
RHEL needs to apply https://lore.kernel.org/patchwork/patch/974664/ before we can revert this monstrosity. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-28qemu: patch in UTS_UBUNTU_RELEASE_ABI for Ubuntu detectionJason A. Donenfeld
This kind of thing really makes me queezy and upset, but there's little that can be done about such situations when dealing with Canonical's kernel. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-28qemu: support fetching kernels for arbitrary URLsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-21qemu: add extra fill in idt handler for newer binutilsJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-21qemu: use cbuild gcc for avx512 exclusionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-21qemu: force 2MB pages for binutils 2.31Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-21qemu: patch kernels that rely on ancient makeJason A. Donenfeld
Kernels without 9feeb638cde0 ("tools build: fix # escaping in .cmd files for future Make") face problems when building with more recent make, so patch these to avoid issues. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-21qemu: remove -Werror in order to build ancient kernels betterJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-21qemu: always use cbuild gcc rather than system gccJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-19qemu: add -fcommon for compiling ping with gcc-10Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-08qemu: use newer iproute2 for gcc-10Jason A. Donenfeld
gcc-10 switched to defaulting to -fno-common, which broke iproute2-5.4. This was fixed in iproute-5.6, so switch to that. Because we're after a stable testing surface, we generally don't like to bump these unnecessarily, but in this case, being able to actually build is a basic necessity. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-04socket: remove errant restriction on looping to selfJason A. Donenfeld
It's already possible to create two different interfaces and loop packets between them. This has always been possible with tunnels in the kernel, and isn't specific to wireguard. Therefore, the networking stack already needs to deal with that. At the very least, the packet winds up exceeding the MTU and is discarded at that point. So, since this is already something that happens, there's no need to forbid the not very exceptional case of routing a packet back to the same interface; this loop is no different than others, and we shouldn't special case it, but rather rely on generic handling of loops in general. This also makes it easier to do interesting things with wireguard such as onion routing. At the same time, we add a selftest for this, ensuring that both onion routing works and infinite routing loops do not crash the kernel. We also add a test case for wireguard interfaces nesting packets and sending traffic between each other, as well as the loop in this case too. We make sure to send some throughput-heavy traffic for this use case, to stress out any possible recursion issues with the locks around workqueues. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-03qemu: use normal kernel stack size on ppc64Jason A. Donenfeld
While at some point it might have made sense to be running these tests on ppc64 with 4k stacks, the kernel hasn't actually used 4k stacks on 64-bit powerpc in a long time, and more interesting things that we test don't really work when we deviate from the default (16k). So, we stop pushing our luck in this commit, and return to the default instead of the minimum. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-05-03qemu: loop entropy adding until getrandom doesn't blockJason A. Donenfeld
Before the 256 was just a guess, which was made wrong by qemu 5.0, so instead actually query whether or not we're all set. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-04-01qemu: bump default kernel to 5.5.14Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-03-18noise: error out precomputed DH during handshake rather than configJason A. Donenfeld
We precompute the static-static ECDH during configuration time, in order to save an expensive computation later when receiving network packets. However, not all ECDH computations yield a contributory result. Prior, we were just not letting those peers be added to the interface. However, this creates a strange inconsistency, since it was still possible to add other weird points, like a valid public key plus a low-order point, and, like points that result in zeros, a handshake would not complete. In order to make the behavior more uniform and less surprising, simply allow all peers to be added. Then, we'll error out later when doing the crypto if there's an issue. This also adds more separation between the crypto layer and the configuration layer. Discussed-with: Mathias Hall-Andersen <mathias@hall-andersen.dk> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-02-12netns: ensure that icmp src address is correct with natJason A. Donenfeld
This is a small test to ensure that icmp_ndo_send is actually doing the right with with regards to the source address. It tests this by ensuring that the error comes back along the right path. Also, backport the new ndo function for this. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-02-05netns: ensure non-addition of peers with failed precomputationJason A. Donenfeld
Ensure that peers with low order points are ignored, both in the case where we already have a device private key and in the case where we do not. This adds points that naturally give a zero output. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-02-05netns: tie socket waiting to target pidJason A. Donenfeld
Without this, we wind up proceeding too early sometimes when the previous process has just used the same listening port. So, we tie the listening socket query to the specific pid we're interested in. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-01-28qemu: bump kernelJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-01-02qemu: only compare archs when deciding whether to use kvmJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-01-02qemu: re-add dependency on wireguard sourcesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2020-01-01qemu: bump packages and support m68k properlyJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-12-26global: remove remaining tools referencesJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-11-27qemu: bump versionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-11-27qemu: respect PATH when finding CBUILDJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-11-27qemu: work around build bug with powerpc64leJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-10-11netns: add test for failing 5.3 FIB changesJason A. Donenfeld
Reference: https://lore.kernel.org/netdev/20190924073615.31704-1-Jason@zx2c4.com/ Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-10-11qemu: bump default versionJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-07-11noise: immediately rekey all peers after changing device private keyJason A. Donenfeld
Reported-by: Derrick Pallas <derrick@pallas.us> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-06-25global: switch to coarse ktimeJason A. Donenfeld
Coarse ktime is broken until [1] in 5.2 and kernels without the backport, so we use fallback code there. The fallback code has also been improved significantly. It now only uses slower clocks on kernels < 3.17, at the expense of some accuracy we're not overly concerned about. [1] https://lore.kernel.org/lkml/tip-e3ff9c3678b4d80e22d2557b68726174578eaf52@git.kernel.org/ Suggested-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-06-18qemu: show signal when failingJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-05-29qemu: do not check for alignment with ubsanJason A. Donenfeld
It insta-crashes on x86. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-05-29qemu: build iproute2 with libmnl supportJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-05-29qemu: use newer iproute2 and kernelJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-04-06allowedips: initialize list head when removing intermediate nodesJason A. Donenfeld
Otherwise if this list item is later reused, we'll crash on list poison or worse. Also, add a version of Mimka's reproducer to netns.sh to catch these types of bugs in the future. Reported-by: Mimka <mikma.wg@lists.m7n.se> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-03-25qemu: set framewarn 1280 for 64bit and 1024 for 32bitJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-02-03noise: store clamped key instead of raw keyJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-01-23netlink: use __kernel_timespec for handshake timeJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-01-23qemu: enable FP on MIPSJason A. Donenfeld
This is a change for Linux 5.0. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-01-23qemu: version bump to bash 5.0Jason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-01-23qemu: version bump kernelJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2019-01-07global: update copyrightJason A. Donenfeld
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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