Move all input sanity checks up and add two missing checks for the
correct network type when using veth-vlan and vlan network types.

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32513Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32558Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32484Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32482Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

oss-fuzz: fixes

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32494Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32532Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

oss-fuzz: fixes

We need to allow relative log paths.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32475Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

oss-fuzz: a few follow-up commits

network: handle name collisions when returning interfaces to host

oss-fuzz: fixes

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32532Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32521Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32473Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

oss-fuzz: make it possible to build the fuzzer without docker

confile: be stricter in config helpers

We never call these helper without an initialized config afaict but
since we're now exposing these two functions to oss-fuzz directly in a
way we never do to users so let's be stricter about it.

Inspired-by: #3733
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

log: dont create log file for fuzz builds

Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32491Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Fixes: #3730
Fixes: https://github.com/google/oss-fuzz/issues/5509Suggested-by: Evgeny Vereshchagin <evvers@ya.ru>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Fixes: #3730
Fixes: https://github.com/google/oss-fuzz/issues/5509Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

It should help to cover more code faster
Signed-off-by: Evgeny Vereshchagin <evvers@ya.ru>

Signed-off-by: Evgeny Vereshchagin <evvers@ya.ru>

It's mostly a cosmetic change that should prevent the fuzzer
from cluttering the "$OUT" directory (which OSS-Fuzz uses to
build docker images):

```
Step #44: Already have image: gcr.io/oss-fuzz/lxc
Step #44:   adding: fuzz-lxc-config-read (deflated 67%)
Step #44:   adding: fuzz-lxc-config-read-WBWKxN (deflated 32%)
Step #44:   adding: fuzz-lxc-config-read_seed_corpus.zip (stored 0%)
Step #44:   adding: honggfuzz (deflated 66%)
Step #44:   adding: llvm-symbolizer (deflated 65%)
```
Signed-off-by: Evgeny Vereshchagin <evvers@ya.ru>

Reviewed-by: Blair Steven <blair.steven@alliedtelesis.co.nz>
Signed-off-by: Sam Boyles <sam.boyles@alliedtelesis.co.nz>

With this patch applied the fuzz target can be built (with ASan)
and run with
```
./src/tests/oss-fuzz.sh
./out/fuzz-lxc-config-read doc/examples/
```

https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32475 can be
reproduced by running
```
$ echo "lxc.console.buffer.size=d" >oss-fuzz-32475
$ ./out/fuzz-lxc-config-read ./oss-fuzz-32475
INFO: Seed: 1044753468
INFO: Loaded 1 modules   (18770 inline 8-bit counters): 18770 [0x883cc0, 0x888612),
INFO: Loaded 1 PC tables (18770 PCs): 18770 [0x888618,0x8d1b38),
./out/fuzz-lxc-config-read: Running 1 inputs 1 time(s) each.
Running: oss-fuzz-32475
=================================================================
==2052097==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffcca063e7f at pc 0x000000659e0d bp 0x7ffcca063e30 sp 0x7ffcca063e28
READ of size 1 at 0x7ffcca063e7f thread T0
...
```

I'll point OSS-Fuzz to the build script once this patch is merged.
Signed-off-by: Evgeny Vereshchagin <evvers@ya.ru>

oss-fuzz: fixes

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32478Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32474Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

Link: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32487Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>