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Instead of ‘int’ or ‘uint32_t’, neither of which convey much meaning,
consistently use a newly added type to hold NDR_ flags.
Update the NDR 4.0.0 ABI.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The LIBNDR_FLAG_ namespace is getting dangerously full, with only a
single flag value (1 << 9) remaining for use. After that flag is put
into use, we won’t be able to add any new flags without increasing the
flag width to 64‐bit.
Up to now we’ve used a haphazard mix of int, unsigned, and uint32_t to
store these flags. Introduce a new type, ‘libndr_flags’, to be used
consistently to hold LIBNDR flags. If in the future we find we need to
move to 64‐bit flags, this type gives us an opportunity to do that.
Bump the NDR version to 4.0.0 — an major version increment, for we’re
changing the function ABI and adding the new symbol
ndr_print_libndr_flags.
Signed-off-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
There is a borderline case where a conditional ACE unicode string
becomes longer than the SDDL parser wants to handle when control
characters are given canonical escaping. This can make the round trip
fail, but it isn't really a problem.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Now that access_check.c includes headers for conditional ACEs, the patch
should take that into account.
Also, we check for a talloc failure.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This parses the blob as a conditional ACE, and if possible tries
decompiling it into SDDL.
There are not many round-trip assertions we can honestly make, but we
keep the trip going as long as possible, in case it reveals anything.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Here we're not compiling the whole SD, just the single conditional
ACE.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We were wanting to ensure the string contains a zero byte, but
instead were checking for a non-zero byte.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
We have been using `uint8_t *`, which works fine as far as
linking goes, but leads fuzz target developers to sometimes
forget why they can't just modify the passed in string instead of
copying it for modification (e.g. to NUL-terminate).
REF: https://llvm.org/docs/LibFuzzer.html#fuzz-target
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
As hinted in f2416493c0 the DCOM and WMI
IDL is now unused. These generate code with PIDL, costing a small
amount of build time but more importantly are fuzzed, which costs an
ongoing amount of CPU time as oss-fuzz tries to find parsing issues.
We do not need to continue this waste, and these can be restored
if this effort is ever to start again.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
If this patch is applied, and an environment variable is set, all
access_check calls will be recorded as seeds for
fuzz_security_token_vs_descriptor. See the patch for details.
You probably will never want to apply this patch, but it is here just
in case.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This of course doesn't exercise the object tree or default SID code,
but it still covers a lot to the *_ds access_check functions.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The token and descriptor are stored in NDR format; for this purpose we
add a new IDL struct containing this pair (along with a desired access
mask).
An upcoming commit will show how to collect seeds for this fuzzer.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This fuzzer parses SDDL into a security descriptor and runs an access
check on it using a known security token. This is purely for crash
detection -- we don't know enough to assert whether the check should
succeed or not.
The seed strings used are compatible with those of fuzz_sddl_parse --
anything found by fuzz_sddl_parse is worth trying as a seed here, and
vice versa.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Apart from catching crashes in the actual parsing, we abort if the SD
we end up with will not round trip back through SDDL to an identical
SD.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The 'compressed' string can be about 9/8 the size of the decompressed
string, but we didn't allow enough memory in the fuzz target for that.
Then when it failed, we didn't check.
Credit to OSSFuzz.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
This compresses some data, decompresses it, and asserts that the
result is identical to the original string.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This differs from fuzz_lzxpress_huffman_round_trip (next commit) in
that the output buffer might be too small for the compressed data, in
which case we want to see an error and not a crash.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Most strings will not successfully decompress, which is OK. What we
care about of course is memory safety.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
We say it is an error to end up at a different result.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
This is the big switch to use samba-dcerpcd for the RPC services in
source3/. It is a pretty big and unordered patch, but I don't see a
good way to split this up into more manageable pieces without
sacrificing bisectability even more. Probably I could cut out a few
small ones, but a major architechtural switch like this will always be
messy.
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Uri Simchoni <uri@samba.org>
Autobuild-User(master): Uri Simchoni <uri@samba.org>
Autobuild-Date(master): Mon Oct 4 11:36:06 UTC 2021 on sn-devel-184
Strip all RUNPATH headers from all dependency shared objects that
we copy to the fuzzing target, as those libraries aren't placed
in their original place.
Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Add a linker flag to generate fuzzer binaries with an RPATH
header instead of RUNPATH.
Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Remove what appears to be a copy+paste error in one place, and
explain that RPATH/RUNPATH is set by the linker, not by chrpath
utility.
Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Update the build_image.sh script to install Ubuntu 20.04 packages
instead of Ubuntu 16.04 on the oss-fuzz container - this will
allow the oss-fuzz container to be based on Ubuntu 20.04.
REF: https://github.com/google/oss-fuzz/issues/6301#issuecomment-911705365
Signed-off-by: Uri Simchoni <uri@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
The /etc/default/locale file does not exists in the rpm family distros
so the do_build.sh script failed with:
./lib/fuzzing/oss-fuzz/do_build.sh: line 31: /etc/default/locale: No
such file or directory
Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Reviewed-by: David Mulder <dmulder@samba.org>
Autobuild-User(master): Samuel Cabrero <scabrero@samba.org>
Autobuild-Date(master): Tue Apr 6 15:54:54 UTC 2021 on sn-devel-184
To compile the AFL binaries, we need every fuzzer to have a consistent
set of functions. Some fuzzers require the initialize function, so all
the rest must have an empty one.
AFL binaires are handy for testing the fuzz results in a less magical
environment than libfuzzer/honggfuzz give you.
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
LLVMFuzzerTestOneInput() NEVER returns non-zero, but if it does, we might as well
know what made it do so
Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Jeremy Allison <jra@samba.org>
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Douglas Bagnall <dbagnall@samba.org>
Autobuild-Date(master): Fri Oct 23 00:33:57 UTC 2020 on sn-devel-184
It is much harder to determine why we get messages like
Step #6: Error occured while running fuzz_reg_parse:
Step #6: /workspace/out/coverage/fuzz_reg_parse: error while loading shared libraries: libavahi-common.so.3: cannot open shared object file: No such file or directory
instead this detects the failure to use RPATH (which is
strictly required instead of the modern RUNPATH)
otherwise.
We do this by creating a new build_samba.sh after renaming
build_samba.sh to do_build.sh because this is what oss-fuzz
runs, meaning we don't need to coordinate a MR there as well.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
We strictly require RPATH, so fix the comment to avoid mentioning
the modern RUNPATH which is almost but not entirely similar.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
This includes a revert of commit e60df21499.
We strictly require RPATH, not the modern RUNPATH for the behaviour
we need in oss-fuzz, which is that not just the first line of dependencies
but the full set of libraries used by the program are looked for in the
'$ORIGIN/lib' directory.
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Autobuild-User(master): Douglas Bagnall <dbagnall@samba.org>
Autobuild-Date(master): Thu Oct 22 14:10:04 UTC 2020 on sn-devel-184
