From: Peter Zijlstra <peterz@infradead.org>
To: Kees Cook <kees@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
alyssa.milburn@intel.com, scott.d.constable@intel.com,
joao@overdrivepizza.com, andrew.cooper3@citrix.com,
jpoimboe@kernel.org, jose.marchesi@oracle.com,
hjl.tools@gmail.com, ndesaulniers@google.com,
samitolvanen@google.com, nathan@kernel.org, ojeda@kernel.org,
alexei.starovoitov@gmail.com, mhiramat@kernel.org, jmill@asu.edu
Subject: Re: [PATCH v3 04/10] x86/traps: Allow custom fixups in handle_bug()
Date: Wed, 19 Feb 2025 19:17:37 +0100 [thread overview]
Message-ID: <20250219181737.GC23004@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <202502190953.53EA878FF@keescook>
On Wed, Feb 19, 2025 at 09:55:10AM -0800, Kees Cook wrote:
> > @@ -340,6 +343,9 @@ static noinstr bool handle_bug(struct pt
> > break;
> > }
> >
> > + if (!handled && regs->ip != addr)
> > + regs->ip = addr;
>
> Can you add a comment above this just to help with people scanning
> through this code in the future, maybe:
>
> /* Restore failure location if we're not continuing execution. */
>
>
> > +
> > if (regs->flags & X86_EFLAGS_IF)
> > raw_local_irq_disable();
> > instrumentation_end();
Done.
next prev parent reply other threads:[~2025-02-19 18:17 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-19 16:21 [PATCH v3 00/10] x86/ibt: FineIBT-BHI Peter Zijlstra
2025-02-19 16:21 ` [PATCH v3 01/10] x86/cfi: Add warn option Peter Zijlstra
2025-02-19 17:50 ` Kees Cook
2025-02-19 17:56 ` Peter Zijlstra
2025-02-19 16:21 ` [PATCH v3 02/10] x86/ibt: Add exact_endbr() helper Peter Zijlstra
2025-02-19 17:51 ` Kees Cook
2025-02-19 16:21 ` [PATCH v3 03/10] x86/traps: Decode 0xEA #UD Peter Zijlstra
2025-02-19 16:47 ` Andrew Cooper
2025-02-19 16:49 ` Peter Zijlstra
2025-02-19 17:52 ` Kees Cook
2025-02-19 16:21 ` [PATCH v3 04/10] x86/traps: Allow custom fixups in handle_bug() Peter Zijlstra
2025-02-19 17:55 ` Kees Cook
2025-02-19 18:17 ` Peter Zijlstra [this message]
2025-02-19 16:21 ` [PATCH v3 05/10] x86/ibt: Optimize FineIBT sequence Peter Zijlstra
2025-02-19 17:15 ` Andrew Cooper
2025-02-20 18:28 ` Constable, Scott D
2025-02-19 18:01 ` Kees Cook
2025-02-19 18:18 ` Peter Zijlstra
2025-02-19 18:23 ` Kees Cook
2025-02-19 16:21 ` [PATCH v3 06/10] x86/traps: Decode LOCK Jcc.d8 #UD Peter Zijlstra
2025-02-19 16:45 ` Peter Zijlstra
2025-02-19 18:20 ` Kees Cook
2025-02-19 18:33 ` Peter Zijlstra
2025-02-19 19:44 ` Peter Zijlstra
2025-02-19 16:21 ` [PATCH v3 07/10] x86/ibt: Add paranoid FineIBT mode Peter Zijlstra
2025-02-19 17:31 ` Andrew Cooper
2025-02-19 20:07 ` Peter Zijlstra
2025-02-21 13:40 ` David Laight
2025-02-19 18:05 ` Kees Cook
2025-02-19 16:21 ` [PATCH v3 08/10] x86: BHI stubs Peter Zijlstra
2025-02-19 18:07 ` Kees Cook
2025-02-19 18:07 ` Peter Zijlstra
2025-02-19 16:21 ` [PATCH v3 09/10] x86/ibt: Implement FineIBT-BHI mitigation Peter Zijlstra
2025-02-19 18:11 ` Kees Cook
2025-02-19 16:21 ` [PATCH v3 10/10] x86/ibt: Optimize fineibt-bhi arity 1 case Peter Zijlstra
2025-02-19 18:21 ` Kees Cook
2025-02-19 17:36 ` [PATCH v3 00/10] x86/ibt: FineIBT-BHI Kees Cook
2025-02-20 11:27 ` Peter Zijlstra
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