We missed a function exit point. This was exacerbated by e3134bf
("device: defer state machine transitions until configuration is
complete"), but the bug existed prior. Minus provided the following
useful reproducer script:
#!/usr/bin/env bash
set -eux
make wireguard-go || exit 125
ip netns del test-ns || true
ip netns add test-ns
ip link add test-kernel type wireguard
wg set test-kernel listen-port 0 private-key <(echo "QMCfZcp1KU27kEkpcMCgASEjDnDZDYsfMLHPed7+538=") peer "eDPZJMdfnb8ZcA/VSUnLZvLB2k8HVH12ufCGa7Z7rHI=" allowed-ips 10.51.234.10/32
ip link set test-kernel netns test-ns up
ip -n test-ns addr add 10.51.234.1/24 dev test-kernel
port=$(ip netns exec test-ns wg show test-kernel listen-port)
ip link del test-go || true
./wireguard-go test-go
wg set test-go private-key <(echo "WBM7qimR3vFk1QtWNfH+F4ggy/hmO+5hfIHKxxI4nF4=") peer "+nj9Dkqpl4phsHo2dQliGm5aEiWJJgBtYKbh7XjeNjg=" allowed-ips 0.0.0.0/0 endpoint 127.0.0.1:$port
ip addr add 10.51.234.10/24 dev test-go
ip link set test-go up
ping -c2 -W1 10.51.234.1
Reported-by: minus <minus@mnus.de>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The deferred RUnlock calls weren't executing until all peers
had been processed. Add an anonymous function so that each
peer may be unlocked as soon as it is completed.
Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
There are more places where we'll need to add it later, when Go 1.18
comes out with support for it in the "net" package. Also, allowedips
still uses slices internally, which might be suboptimal.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
A peer.endpoint never becomes nil after being not-nil, so creation is
the only time we actually need to set this. This prevents a race from
when the variable is actually used elsewhere, and allows us to avoid an
expensive atomic.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Forgetting to seed the unsafe rng, the jitter before followed a fixed
pattern, which didn't help when a fleet of computers all boot at once.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Update gvisor to v0.0.0-20211020211948-f76a604701b6, which requires some
changes to tun.go:
WriteRawPacket: Add function with not implemented error.
CreateNetTUN: Replace stack.AddAddress with stack.AddProtocolAddress, and
fix IPv6 address in error message.
Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
(*NativeTun).operateOnFd is only used on darwin and freebsd. Adjust the
build tags accordingly.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
At these points, the socket file descriptor is not yet wrapped in an
*os.File, so it needs to be closed explicitly on error.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Otherwise recent WDK binaries fail on ARM64, where an exception handler
is used for trapping an illegal instruction when ARMv8.1 atomics are
being tested for functionality.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The reason this was failing before is that dloadsup.h's
DloadObtainSection was doing a linear search of sections to find which
header corresponds with the IMAGE_DELAYLOAD_DESCRIPTOR section, and we
were stupidly overwriting the VirtualSize field, so the linear search
wound up matching the .text section, which then it found to not be
marked writable and failed with FAST_FAIL_DLOAD_PROTECTION_FAILURE.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Probably a bad idea, but we don't currently support it, and those huge
windows.NewCallback trampolines make juicer targets anyway.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Trying this for every peer winds up being very slow and precludes it
from acceptable runtime in the CI, so reduce this to 4.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Now that we have parent pointers hooked up, we can simply go right to
the node and remove it in place, rather than having to recursively walk
the entire trie.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This makes the insertion algorithm a bit more efficient, while also now
taking on the additional task of connecting up parent pointers. This
will be handy in the following commit.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Heavier network extensions might require the wireguard-go component to
use less ram, so let users of this reduce these as needed.
At some point we'll put this behind a configuration method of sorts, but
for now, just expose the consts as vars.
Requested-by: Josh Bleecher Snyder <josh@tailscale.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
On Linux we can run `ip link del wg0`, in which case the fd becomes
stale, and we should exit. Since this is an intentional action, don't
treat it as an error.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
The -1 protection was removed and the wrong error was returned, causing
us to read from a bogus fd. As well, remove the useless closures that
aren't doing anything, since this is all synchronized anyway.
Fixes: 10533c3 ("all: make conn.Bind.Open return a slice of receive functions")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
