From: Thomas Gleixner <tglx@linutronix.de>
To: Lai Jiangshan <jiangshanlai@gmail.com>, linux-kernel@vger.kernel.org
Cc: Borislav Petkov <bp@alien8.de>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Andy Lutomirski <luto@kernel.org>,
x86@kernel.org, Lai Jiangshan <jiangshan.ljs@antgroup.com>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Joerg Roedel <jroedel@suse.de>,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
Kees Cook <keescook@chromium.org>
Subject: Re: [PATCH V5 7/7] x86/entry: Use idtentry macro for entry_INT80_compat
Date: Mon, 25 Apr 2022 12:24:57 +0200 [thread overview]
Message-ID: <877d7d31fq.ffs@tglx> (raw)
In-Reply-To: <20220412121541.4595-8-jiangshanlai@gmail.com>
On Tue, Apr 12 2022 at 20:15, Lai Jiangshan wrote:
> From: Lai Jiangshan <jiangshan.ljs@antgroup.com>
>
> entry_INT80_compat is identical to idtentry macro except a special
> handling for %rax in the prolog.
Seriously?
> - pushq %rsi /* pt_regs->si */
> - xorl %esi, %esi /* nospec si */
esi is not cleared in CLEAR_REGS. So much for identical.
Thanks,
tglx
next prev parent reply other threads:[~2022-04-25 10:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-12 12:15 [PATCH V5 0/7] x86/entry: Clean up entry code Lai Jiangshan
2022-04-12 12:15 ` [PATCH V5 1/7] x86/traps: Move pt_regs only in fixup_bad_iret() Lai Jiangshan
2022-04-12 12:15 ` [PATCH V5 2/7] x86/entry: Switch the stack after error_entry() returns Lai Jiangshan
2022-04-12 12:15 ` [PATCH V5 3/7] x86/entry: Move PUSH_AND_CLEAR_REGS out of error_entry() Lai Jiangshan
2022-04-12 13:26 ` Borislav Petkov
2022-04-12 13:52 ` Lai Jiangshan
2022-04-12 14:30 ` Borislav Petkov
2022-04-13 3:48 ` Lai Jiangshan
2022-04-13 8:39 ` Borislav Petkov
2022-04-12 12:15 ` [PATCH V5 4/7] x86/entry: Move cld to the start of idtentry macro Lai Jiangshan
2022-04-12 12:15 ` [PATCH V5 5/7] x86/entry: Don't call error_entry() for XENPV Lai Jiangshan
2022-04-20 16:32 ` Borislav Petkov
2022-04-12 12:15 ` [PATCH V5 6/7] x86/entry: Convert SWAPGS to swapgs and remove the definition of SWAPGS Lai Jiangshan
2022-04-12 12:15 ` [PATCH V5 7/7] x86/entry: Use idtentry macro for entry_INT80_compat Lai Jiangshan
2022-04-25 10:24 ` Thomas Gleixner [this message]
2022-04-25 13:25 ` Lai Jiangshan
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