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We return Ctime from CreationTime. But "C" does not stand for "creation",
it stands for "status change" (inode update). It may or may not be the
creation time.
Use Btime (birth time) for creation time.
Fixes #6547
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DiskUsage returns total recursive disk usage of the dir (similar to du -s).
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This allows to understand if a bug is new
(found in the current run) or old.
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Doing so can result in syz-manager leaking GCE instances. Set PDEATHSIG
to SIGTERM instead, so that syz-manager has a change to exit gracefully.
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Turns out ast.Inspect does not visit most comments.
Walk file.Comments manually.
Update #1876
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Appengine doesn't provide appengine tag anymore.
Resort to use of syscall package for ExitStatus instead.
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Use unix.Unmount instead of manually wrapping SYS_UMOUNT2.
Use unix.IoctlSetPointerInt instead of manually wrapping SYS_IOCTL. This
also allows to use FS_IOC_SETFLAGS instead of manually defining it for
each GOARCH.
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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* mmap syscall is special on Linux s390x because
the parameters for this syscall are passed as a struct
on user stack instead of registers.
* Introduce the SyscallTrampolines table into targets.Target
to address the above problem.
* There is a bug in Linux kernel s390x which causes QEMU TCG
to hang when KASAN is enabled. The bug has been fixed
in the forthcoming Linux 5.8 version. Until then do not enable
KASAN when using QEMU TCG, QEMU KVM shall have no problems with
KASAN.
Signed-off-by: Alexander Egorenkov <Alexander.Egorenkov@ibm.com>
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CI does not have syzkaller user, but may run under root.
Update #1699
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Add basic stuff to enable MIPS64ELR2 target:
- build
- make extract
- make generate
- qemu execution
- system call parsing from /proc/kallsyms
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pkg/osutil/osutil_linux.go:44:13: cannot use info.Totalram (type uint32) as type uint64 in return argument
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Ensure that we have at least 1GB per Makefile job.
Go compiler/linker can consume significant amount of memory
(observed to consume at least 600MB). See #1276 for context.
Update #1276
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In some cases we start scp, which starts ssh,
then kill scp but the ssh subprocess is not killed.
As the result cmd.Wait hangs waiting for EOF on the stdout/stderr,
which are still kept alive by ssh subprocess. But ssh just hangs forever.
Create a process group for each command and kill whole process group.
Hopefully this will help.
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If sandboxing is disabled don't unshare net namespace too.
Update #501
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Just appending the pid number can produce conflicting names
if the name itself ends with digits (standard temp file naming convention).
So append ".PID".
Also remove beginning from too long names instead of ending.
Temp files in tests has unique numbers at the end, we need to preserve them
to avoid file name conflicts.
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In pkg/ipc we don't just want to UmountAll,
we want to remove all handling as many cases as possible
(mounts, read-only files, etc, similar to executor's remove_dir).
So unmounting and removing needs to be a single function,
so that it can handle all these cases.
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If SYZ_DISABLE_SANDBOXING=yes is set, don't do user sandboxing.
Will be usefule for bisection tool which runs locally,
but needs to build kernel.
Update #501
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When manager is stopped there are sometimes runaway qemu
processes still running. Set PDEATHSIG for all subprocesses.
We never need child processes outliving parents.
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We currently use more complex and functional protocol on linux,
and a simple ad-hoc protocol on other OSes.
This leads to code duplication in both ipc and executor.
Linux supports coverage, shared memory communication and fork server,
which would also be useful for most other OSes.
Unify communication protocol and parametrize it by
(1) use of shmem or only pipes, (2) use of fork server.
This reduces duplication in ipc and executor and will
allow to support the useful features for other OSes easily.
Finally, this fixes akaros support as it currently uses
syz-stress running on host (linux) and executor running on akaros.
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Dashboard app now depends on osutil through config package.
Reshuffle functions so that the package does not depend
on syscall in appengine build.
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