Re: [PATCH] x86/nmi/64: avoid passing user space rsp of pt_regs to nmi handler

[Andy Lutomirski]

To avoid further wasting time solving this wrong: NAK.  pt_regs is the actual interrupted state, not some oddly sanitized version thereof.  NMI isn't even the only way you can have a weird pt_regs like this.

It seems that some older kernels contain bugs where they incorrectly assume that regs->rsp is a valid pointer.  Why don't you write a patch for *that * and send it to lkml, us, and stable@xxxxxxxxxxxxxxxx