linux-kernel - Re: [PATCH -tip] kprobes/x86: Remove unneeded casting from immediate value

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <Y+UUDv33FAZz2KPz@hirez.programming.kicks-ass.net>
Date:   Thu, 9 Feb 2023 16:41:02 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Masami Hiramatsu (Google)" <mhiramat@...nel.org>
Cc:     x86@...nel.org, Nadav Amit <nadav.amit@...il.com>,
        Borislav Petkov <bp@...en8.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH -tip] kprobes/x86: Remove unneeded casting from immediate
 value

On Fri, Feb 10, 2023 at 12:36:36AM +0900, Masami Hiramatsu (Google) wrote:
> From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
> 
> Remove unneeded casting from immediate value assignments for relative
> jump offset. Since the immediate values in the 'insn' data structure are
> assigned from immediate bytes as a signed value to insn.immediate.value
> by insn_field_set(). Thus, if we need to access that value as a signed
> value (in this kprobe's case), we don't need to cast it.
> This is a kind of clean up (should not change behavior) follows Nadav's
> bugfix.
> 
> Link: https://lore.kernel.org/all/20230208071708.4048-1-namit@vmware.com/
> Signed-off-by: Masami Hiramatsu (Google) <mhiramat@...nel.org>

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>