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.
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
Some sounds ioctls are now explicitly doubled for 32/64 bits. Support that.
Fix mips SOL_SOCKET issues by rearranging includes.
Improve few other fields.
This patch adds all autogenerated files for linux/mips64le. Files are
generated by following commands:
make extract
bin/syz-extract -build -os=linux -arch=mips64le -sourcedir=linux
make generate
Amusingly we never passed number of threads to wake for FUTEX_WAKE.
It somehow worked reliably on linux (we just needed it to not be 0,
so presumably garbage in registers did it).
However, in gVisor every other syscall wasn't even started
(first syscall on a thread started, but second on the same worker
thread wasn't unable to start).
Add tests for issue #1542
The correct results are obtained with the following program:
struct foo {
unsigned char f0;
unsigned int f1:4;
unsigned short f2:4;
};
struct bar {
char f0;
struct foo foo;
};
int main() {
struct bar y;
memset(&y, 0, sizeof(y));
y.f0 = 0x12;
y.foo.f0 = 0x34;
y.foo.f1 = 0x56;
y.foo.f2 = 0x78;
int i;
for (i = 0; i < sizeof(y); i++)
printf("%02x", ((unsigned char*)&y)[i]);
printf("\n");
}
Build with some gcc's fails:
In file included from executor/executor.cc:133:0:
executor/common_linux.h: In function ‘long int syz_read_part_table(long unsigned int, long unsigned int, long int)’:
executor/common.h:117:15: error: ignoring return value of ‘ssize_t pwrite(int, const void*, size_t, __off_t)’, declared with attribute warn_unused_result [-Werror=unused-result]
__VA_ARGS__; \
^
executor/common_linux.h:1279:3: note: in expansion of macro ‘NONFAILING’
NONFAILING(pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset));
^
executor/common_linux.h: In function ‘long int syz_mount_image(long int, long int, long unsigned int, long unsigned int, long int, long int, long int)’:
executor/common.h:117:15: error: ignoring return value of ‘ssize_t pwrite(int, const void*, size_t, __off_t)’, declared with attribute warn_unused_result [-Werror=unused-result]
__VA_ARGS__; \
^
executor/common_linux.h:1364:3: note: in expansion of macro ‘NONFAILING’
NONFAILING(pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset));
^
cc1plus: all warnings being treated as errors
1. It always crashed in cover_reset when coverage is disabled.
2. Use NONFAILING when accessing image segments.
3. Give it additional 100 ms as it may be slow.
4. Add a test for syz_mount_image.
Layout of kcov_remote_arg is ABI-dependent,
as the result when 32-bit userspace talks to 64-bit kernel
it does not work out of the box. We need both statically
different structs for kernels of different bitnesses,
but also dynamic dispatch because a 32-bit userspace
can talk to both 64-bit and 32-bit kernels.
Enable /dev/tty{1-6}. These seem to be special.
Few first connected to framebuffers. But the rest
seem to be different from e.g. tty20 anyway.
Also /dev/tty is different from the rest.
/dev/ttyS3 and /dev/ttyprintk are different.
Properly pair BSD pty terminals.
It's /dev/watch_queue not /dev/fd_watch_queue.
Don't know if it was renamed, or alwys wrong, but does not matter much,
now it's /dev/watch_queue.
Also attach v4l ioctls to /dev/swradio,radio,vbi,cec.
It seems that _some_ of them are applicable to these devices as well.
