oss-sec mailing list archives
Re: Linux kernel: "Meltdown leaks with Global kernel mapping"
From: Dave Hansen <dave.hansen () linux intel com>
Date: Thu, 11 Oct 2018 13:30:33 -0700
On 10/09/2018 04:41 AM, Solar Designer wrote:
There are mentions of "r/w kernel text issue" and "unused hole" issue - is this why "two"? But "r/w kernel text" feels irrelevant to Meltdown.
The description says:
The current PTI code leaves the entire area of the kernel binary between '_text' and '_end' as Global (on non-PCID hardware). However, that range contains both read-write kernel data, and two "unused" holes in addition to text.
I said two issues because I saw two distinct problems: 1. 'read-write kernel data' 2. '"unused" holes' Does that clear it up?
Current thread:
- Linux kernel: "Meltdown leaks with Global kernel mapping" Solar Designer (Oct 09)
- Re: Linux kernel: "Meltdown leaks with Global kernel mapping" Dave Hansen (Oct 11)