x86/entry: Clear registers for compat syscalls
At entry userspace may have populated registers with values that could
be useful in a speculative execution attack. Clear them to minimize the
kernel's attack surface.
[djbw: rename the macro, only clear the extra registers]
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Cc: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
1 file changed
