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Date: Mon, 5 Mar 2018 11:40:20 -0800
From: Dave Hansen <dave.hansen@...ux.intel.com>
To: Alexander Popov <alex.popov@...ux.com>,
kernel-hardening@...ts.openwall.com, Kees Cook <keescook@...omium.org>,
PaX Team <pageexec@...email.hu>, Brad Spengler <spender@...ecurity.net>,
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Peter Zijlstra <a.p.zijlstra@...llo.nl>, "Dmitry V . Levin"
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Will Deacon <will.deacon@....com>, Arnd Bergmann <arnd@...db.de>,
x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v9 4/7] x86/entry: Erase kernel stack in
syscall_trace_enter()
On 03/03/2018 12:00 PM, Alexander Popov wrote:
> @@ -128,6 +134,7 @@ static long syscall_trace_enter(struct pt_regs *regs)
>
> do_audit_syscall_entry(regs, arch);
>
> + erase_kstack();
> return ret ?: regs->orig_ax;
> }
This seems like an odd place to be clearing the stack. Why was it done her?
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