linux-kernel - Re: [PATCH] Audit: push audit success and retcode into arch ptrace.h

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Message-ID: <4DE7FE2A.10107@zytor.com>
Date:	Thu, 02 Jun 2011 14:18:34 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Eric Paris <eparis@...hat.com>
CC:	linux-kernel@...r.kernel.org, tony.luck@...el.com,
	fenghua.yu@...el.com, monstr@...str.eu, ralf@...ux-mips.org,
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Subject: Re: [PATCH] Audit: push audit success and retcode into arch ptrace.h

On 06/02/2011 02:04 PM, Eric Paris wrote:
> The audit system previously expected arches calling to audit_syscall_exit to
> supply as arguments if the syscall was a success and what the return code was.
> Audit also provides a helper AUDITSC_RESULT which was supposed to simplify by
> converting from negative retcodes to an audit internal magic value stating
> success or failure.  This helper was wrong and could indicate that a valid
> pointer returned to userspace was a failed syscall.  The fix is to fix the
> layering foolishness.  We now pass audit_syscall_exit a struct pt_reg and it
> in turns calls back into arch code to collect the return value and to
> determine if the syscall was a success or failure.
> 
> In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old
> audit code.  But the ptrace_64.h code was previously using regs[3] for the
> regs_return_value().  I have no idea which one is correct, but this patch now
> uses regs[3].
> 
> Signed-off-by: Eric Paris <eparis@...hat.com>

For the x86 portions:

Acked-by: H. Peter Anvin <hpa@...or.com>

	-hpa
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