Syzkaller machine check failing

[Mohammad Mahmoud Mohammad]

Dears,

I hope you are well. I have a problem running syzkaller successfully.

I am trying to fuzz linux kernel 6.1 and it gives me this error when running  syz-manager: "SYZFATAL: Manager.Check call failed: machine check failed: program execution failed: executor 0: not serving"

Attached the "syzkaller_output" showing the machine check failing and the syzkaller manager config file.

Also the commit of syzkaller is: "9a6f477c8db8de69698177a2dfbb029451cafcd3"

your fast reply is highly appreciated.

Thanks & Best Regards.

Mohammad.

[Mohammad Mahmoud Mohammad]

Kind Reminder

[Aleksandr Nogikh]

Hi,

Hard to say exactly from the data you've shared. It's failing because
it didn't receive a reply from this function in time
(https://github.com/google/syzkaller/blob/a87f55960b1c75aa2372576b6bcae0d003ace8a9/executor/executor.cc#L646),
but it's unclear why.

How long did it take the VM to boot? From the log it feels like it's
very very slow. Have you enabled KVM or is it fully emulated?

Other than that:
- Did you build the kernel/syzkaller exactly as described in
https://github.com/google/syzkaller/blob/master/docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md
?
- Did you make any local changes to syzkaller/kernel before building them?

--
Aleksandr

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