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The alternative would be to treat gvariant and !gvariant messages differently.
But this is a problem because we check signatures is variuos places before we
have an actual message, for example in sd_bus_add_object_vtable(). It seems
better to treat things consistent (i.e. follow the lowest common denominator)
and disallow empty structures everywhere.
We didn't free one of the fields in two of the places.
$ valgrind --show-leak-kinds=all --leak-check=full \
build/fuzz-bus-message \
test/fuzz/fuzz-bus-message/leak-c09c0e2256d43bc5e2d02748c8d8760e7bc25d20
...
==14457== HEAP SUMMARY:
==14457== in use at exit: 3 bytes in 1 blocks
==14457== total heap usage: 509 allocs, 508 frees, 51,016 bytes allocated
==14457==
==14457== 3 bytes in 1 blocks are definitely lost in loss record 1 of 1
==14457== at 0x4C2EBAB: malloc (vg_replace_malloc.c:299)
==14457== by 0x53AFE79: strndup (in /usr/lib64/libc-2.27.so)
==14457== by 0x4F52EB8: free_and_strndup (string-util.c:1039)
==14457== by 0x4F8E1AB: sd_bus_message_peek_type (bus-message.c:4193)
==14457== by 0x4F76CB5: bus_message_dump (bus-dump.c:144)
==14457== by 0x108F12: LLVMFuzzerTestOneInput (fuzz-bus-message.c:24)
==14457== by 0x1090F7: main (fuzz-main.c:34)
==14457==
==14457== LEAK SUMMARY:
==14457== definitely lost: 3 bytes in 1 blocks
v2: fix error in free_and_strndup()
When the orignal and copied message were the same, but shorter than specified
length l, memory read past the end of the buffer would be performed. A test
case is included: a string that had an embedded NUL ("q\0") is used to replace
"q".
v3: Fix one more bug in free_and_strndup and add tests.
v4: Some style fixed based on review, one more use of free_and_replace, and
make the tests more comprehensive.
318/365 fuzz-bus-message:crash-26bba7182dedc8848939931d9fcefcb7922f2e56:address OK 0.03 s
319/365 fuzz-bus-message:crash-29ed3c202e0ffade3cad42c8bbeb6cc68a21eb8e:address OK 0.03 s
320/365 fuzz-bus-message:crash-b88ad9ecf4aacf4a0caca5b5543953265367f084:address OK 0.03 s
321/365 fuzz-bus-message:crash-c1b37b4729b42c0c05b23cba4eed5d8102498a1e:address OK 0.03 s
322/365 fuzz-bus-message:crash-d8f3941c74219b4c03532c9b244d5ea539c61af5:address OK 0.03 s
323/365 fuzz-bus-message:crash-e1b811da5ca494e494b77c6bd8e1c2f2989425c5:address OK 0.03 s
324/365 fuzz-bus-message:leak-c09c0e2256d43bc5e2d02748c8d8760e7bc25d20:address OK 0.04 s
325/365 fuzz-bus-message:message1:address OK 0.03 s
326/365 fuzz-bus-message:timeout-08ee8f6446a4064db064e8e0b3d220147f7d0b5b:address OK 0.03 s
327/365 fuzz-dhcp-server:discover-existing:address OK 0.04 s
328/365 fuzz-dhcp-server:discover-new:address OK 0.03 s
329/365 fuzz-dhcp-server:release:address OK 0.04 s
330/365 fuzz-dhcp-server:request-existing:address OK 0.03 s
331/365 fuzz-dhcp-server:request-new:address OK 0.03 s
332/365 fuzz-dhcp-server:request-reboot:address OK 0.03 s
333/365 fuzz-dhcp-server:request-renew:address OK 0.03 s
334/365 fuzz-dns-packet:issue-7888:address OK 0.03 s
335/365 fuzz-dns-packet:oss-fuzz-5465:address OK 0.03 s
336/365 fuzz-journal-remote:crash-5a8f03d4c3a46fcded39527084f437e8e4b54b76:address OK 0.06 s
337/365 fuzz-journal-remote:crash-96dee870ea66d03e89ac321eee28ea63a9b9aa45:address OK 0.04 s
338/365 fuzz-journal-remote:invalid-ts.txt:address OK 0.04 s
339/365 fuzz-journal-remote:oss-fuzz-8659:address OK 0.06 s
340/365 fuzz-journal-remote:oss-fuzz-8686:address OK 0.04 s
341/365 fuzz-journal-remote:sample.txt:address OK 0.07 s
342/365 fuzz-unit-file:directives.service:address OK 0.03 s
343/365 fuzz-unit-file:empty.scope:address OK 0.04 s
344/365 fuzz-unit-file:machine.slice:address OK 0.03 s
345/365 fuzz-unit-file:oss-fuzz-6884:address OK 0.05 s
346/365 fuzz-unit-file:oss-fuzz-6885:address OK 0.03 s
347/365 fuzz-unit-file:oss-fuzz-6886:address OK 0.04 s
348/365 fuzz-unit-file:oss-fuzz-6892:address OK 0.03 s
349/365 fuzz-unit-file:oss-fuzz-6897:address OK 0.05 s
350/365 fuzz-unit-file:oss-fuzz-6897-evverx:address OK 0.04 s
351/365 fuzz-unit-file:oss-fuzz-6908:address OK 0.05 s
352/365 fuzz-unit-file:oss-fuzz-6917:address OK 0.06 s
353/365 fuzz-unit-file:oss-fuzz-6977:address OK 0.08 s
354/365 fuzz-unit-file:oss-fuzz-6977-unminimized:address OK 0.10 s
355/365 fuzz-unit-file:oss-fuzz-7004:address OK 0.03 s
356/365 fuzz-unit-file:oss-fuzz-8064:address OK 0.03 s
357/365 fuzz-unit-file:oss-fuzz-8827:address OK 0.50 s
358/365 fuzz-unit-file:proc-sys-fs-binfmt_misc.automount:address OK 0.03 s
359/365 fuzz-unit-file:syslog.socket:address OK 0.03 s
360/365 fuzz-unit-file:systemd-ask-password-console.path:address OK 0.03 s
361/365 fuzz-unit-file:systemd-machined.service:address OK 0.03 s
362/365 fuzz-unit-file:systemd-resolved.service:address OK 0.03 s
363/365 fuzz-unit-file:systemd-tmpfiles-clean.timer:address OK 0.03 s
364/365 fuzz-unit-file:timers.target:address OK 0.03 s
365/365 fuzz-unit-file:var-lib-machines.mount:address OK 0.04 s
This gives us slightly nicer coverage in the normal test run.
When in a git repo, git ls-files is used to get a list of files known to git.
This mirrors what update-man-rules does for man files. Only looking at files
known to git makes it easier to not forget to commit the test file to git,
and also makes bisecting easier if some files are left in repo.
When outside of a git repo, we expect to be unpacked from a tarball, so just
using all files reported by ls is OK.
In the main meson.build file, .source_root() and .current_source_dir() are
equivalent, but it seems more appropriate to use .source_root() when we are appending
a path which is by design relative to repo root.
The justification is the same as for -Dvalgrind: setting config in
meson in this way is easier, because when the value is changed stuff
that should be rebuilt is rebuilt.
There isn't really much need to keep them separate. Anything which is a good
corpus entry can be used as a smoke test, and anything which which is a
regression test can just as well be inserted into the corpus.
The only functional difference from this patch (apart from different paths in
output) is that the regression tests are now zipped together with the rest of
the corpus.
$ meson configure build -Dslow-tests=true && ninja -C build test
...
307/325 fuzz-dns-packet:issue-7888:address OK 0.06 s
308/325 fuzz-dns-packet:oss-fuzz-5465:address OK 0.04 s
309/325 fuzz-journal-remote:crash-5a8f03d4c3a46fcded39527084f437e8e4b54b76:address OK 0.07 s
310/325 fuzz-journal-remote:crash-96dee870ea66d03e89ac321eee28ea63a9b9aa45:address OK 0.05 s
311/325 fuzz-journal-remote:oss-fuzz-8659:address OK 0.05 s
312/325 fuzz-journal-remote:oss-fuzz-8686:address OK 0.07 s
313/325 fuzz-unit-file:oss-fuzz-6884:address OK 0.06 s
314/325 fuzz-unit-file:oss-fuzz-6885:address OK 0.05 s
315/325 fuzz-unit-file:oss-fuzz-6886:address OK 0.05 s
316/325 fuzz-unit-file:oss-fuzz-6892:address OK 0.05 s
317/325 fuzz-unit-file:oss-fuzz-6897:address OK 0.05 s
318/325 fuzz-unit-file:oss-fuzz-6897-evverx:address OK 0.06 s
319/325 fuzz-unit-file:oss-fuzz-6908:address OK 0.07 s
320/325 fuzz-unit-file:oss-fuzz-6917:address OK 0.07 s
321/325 fuzz-unit-file:oss-fuzz-6977:address OK 0.13 s
322/325 fuzz-unit-file:oss-fuzz-6977-unminimized:address OK 0.12 s
323/325 fuzz-unit-file:oss-fuzz-7004:address OK 0.05 s
324/325 fuzz-unit-file:oss-fuzz-8064:address OK 0.05 s
325/325 fuzz-unit-file:oss-fuzz-8827:address OK 0.52 s
This was discussed at the systemd hackfest during ASG2018, and
we agreed to use the Ruby text [1] with the enforcement clause based on
the "contributor covenant". I obviously modified the text where applicable
to refer to systemd.
[1] https://www.ruby-lang.org/en/conduct/
Fixes 10148.
cross building systemd to arm64 presently fails, because the build
system uses plain gcc and plain ld (build architecture compiler and
linker respectively) for building src/boot/efi. These values come from
the efi-cc and efi-ld options respectively. It rather should be using
host tools here.
Fixes: b710072da4 ("add support for building efi modules")
