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Make as much code as possible shared between all OSes.
In particular main is now common across all OSes.
Make more code shared between executor and csource
(in particular, loop function and threaded execution logic).
Also make loop and threaded logic shared across all OSes.
Make more posix/unix code shared across OSes
(e.g. signal handling, pthread creation, etc).
Plus other changes along similar lines.
Also support test OS in executor (based on portable posix)
and add 4 arches that cover all execution modes
(fork server/no fork server, shmem/no shmem).
This change paves way for testing of executor code
and allows to preserve consistency across OSes and executor/csource.
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Lots of assorted heavylifting to support csource on fuchsia.
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We see some crashes that suggest corruption of the syscall number:
invalid command number 1296 (errno 11)
invalid command number 107 (errno 110)
Make the table and the number constant to prevent corruption.
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Update #538
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There is test failure on travis:
https://travis-ci.org/google/syzkaller/jobs/349948391
I can't reproduce it locally, and it only happened on 1.8, but not on 1.9?
But this seems to be what could have provoked such failure.
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We use errno, vaargs, printf in all of fail/error/exitf,
but we include the corresponding headers only when SYZ_USE_TMP_DIR.
Include them whenever fail/error/exitf are used.
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The new pseudo syscall allows opening sockets that can only
be created in init net namespace (BLUETOOTH, NFC, LLC).
Use it to open these sockets.
Unfortunately this only works with sandbox none at the moment.
The problem is that setns of a network namespace requires CAP_SYS_ADMIN
in the target namespace, and we've lost all privs in the init namespace
during creation of a user namespace.
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The "define uint64_t unsigned long long" were too good to work.
With a different toolchain I am getting:
cstdint:69:11: error: expected unqualified-id
using ::uint64_t;
^
executor/common.h:34:18: note: expanded from macro 'uint64_t'
Do it the proper way: introduce uint64/32/16/8 types and use them.
pkg/csource then does s/uint64/uint64_t/ to not clutter code with
additional typedefs.
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I see a crash which says:
#0: too much cover 0 (errno 0)
while the code is:
uint64_t n = ...;
if (n >= kCoverSize)
fail("#%d: too much cover %u", th->id, n);
It seems that the high part of n is set, but we don't see it.
Add printf format attribute to fail and friends and fix all similar cases.
Caught a bunch of similar cases and a missing argument in:
exitf("opendir(%s) failed due to NOFILE, exiting");
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exitf function was not defined with some combinations of options in csource.
Fix defines and switch exitf back to fail, fail already checks ENOMEM/EAGAIN,
so there is no reason to use exitf in this particular case.
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