Mark ifindex as opt in SIOCGIFINDEX.
Otherwise it's considered inout and SIOCGIFINDEX can't be used
to produce ifindex'es on its own. It requires an input ifindex
first and only then it can output own ifindex.
virt_wifi docs say that the enslaved device won't be usable
on itself. It's probably not a good idea to make lo unusable.
Enslave a dedicated veth instead.
Looks for source files in object dir.
This is required for out-of-tree linux builds.
E.g. security/selinux/flask.h contains some sources
with coverage callbacks, but it's auto-generated
and located in the build dir.
1. Use optional[T] instead of array[T, 0:1].
2. Deduplicate 3 copies of ARP packet.
3. Deduplicate IPOPT_LSRR/IPOPT_SSRR/IPOPT_RR.
4. More precise description of IPOPT_TIMESTAMP/IPOPT_LSRR/IPOPT_SSRR/IPOPT_RR.
5. Don't use IPOPT_END/IPOPT_NOOP in generic option (they have different format).
6. Restrict cipso doi values.
7. Fix IPOPT_RA value type (int16 instead of int32).
8. Match ipv4/ipv6 packet type with payload.
9. Prefer 0 frag_off for ipv4 packets (they are extremely hard to get right).
Use a random subset of syscalls/corpus/coverage for each individual VM run.
Hypothesis is that this should allow fuzzer to get more coverage
find more bugs in saturated state (stuck in local optimum).
See the issue and comments for details.
Update #1348
We get them in cross-compilation test where an out const
arg has different values in different archs.
No reason to fail deserialization in that case, replace with default
arg instead.
Currently we print them as part of `make genereate`,
but nobody reads them, too much output each time.
Don't print them in `make generate` and instead
print in syz-check, the warn files are a good mechanism
to handle "known warnings".
Combine markBitfields and addAlignment functions.
Fixing #1542 will require doing both at the same time,
they are not really independent.
Also remove the special case for packed structs,
pad them as part of the common procedure.
No functional changes.
PC from the target is address of "jal __sanitizer_cov_trace_pc" + 8.
E.g. case below has address ffffffff80b4eec4 in PC
ffffffff80b4eebc: jal ffffffff80232080 <__sanitizer_cov_trace_pc>
ffffffff80b4eec0: nop
ffffffff80b4eec4: move a1,s0
All callers of BitfieldMiddle just want static size (0 for middle).
Make it so: Size for middle bitfields just returns 0. Removes lots of if's.
Introduce Type.UnitSize, which now holds the underlying type for bitfields.
This will be needed to fix#1542 b/c even if UnitSize=4 for last bitfield
Size can be anywhere from 0 to 4 (not necessary equal to UnitSize due to overlapping).
We assumed that for ConstType alignment is equal to size,
which is perfectly reasonable for normal int8/16/32/64/ptr.
However, padding is also represented by ConstType of arbitrary size,
so if we added 157 bytes of padding that becomes alignment of
the padding field and as the result of the whole struct.
This affects very few structs, but quite radically and quite
important structs.
Discovered thanks to syz-check.
Update #590
