Re: [PATCH bpf 3/3] selftest/bpf: Test the read of vsyscall page under x86-64

[Sohil Mehta]

On 1/18/2024 11:30 PM, Hou Tao wrote:

> vsyscall page could be disabled by CONFIG_LEGACY_VSYSCALL_NONE or
> vsyscall=none boot cmd-line, but it doesn't affect the reproduce of the
> problem and the returned error codes.
> 

With vsyscall=emulate a direct read of the vsyscall address from
userspace is expected to go through. This is mode deprecated so maybe it
wouldn't matter much. Without the fix in patch 2/3, do you see the same
behavior with vsyscall=emulate set in the cmdline?

Sohil