Re: [PATCH 3.16 56/76] x86/syscall: Sanitize syscall table de-references under speculation

On 03/12/2018, 04:06 AM, Ben Hutchings wrote:

In 3.16 the x86_32 syscall table lookup is also written in assembly. So I've taken Jiri's version and added similar masking in entry_32.S, using edx as the temporary. edx is clobbered by SAVE_REGS and seems to be free at this point.

I don't know the state in 3.16, but in 3.12, I had to fix the 32bit entry on 64bit in arch/x86/ia32/ia32entry.S (ia32_sysenter_target & others) too.

thanks,