linux-kernel - [PATCH] KVM: VMX: restore vmx

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-next>] [day] [month] [year] [list]

Message-Id: <20230531155821.80590-1-jon@nutanix.com>
Date:   Wed, 31 May 2023 11:58:21 -0400
From:   Jon Kohler <jon@...anix.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Jon Kohler <jon@...anix.com>, Alexey Dobriyan <adobriyan@...il.com>
Subject: [PATCH] KVM: VMX: restore vmx_vmexit alignment

Commit 8bd200d23ec4 ("KVM: VMX: Flatten __vmx_vcpu_run()") changed
vmx_vmexit from SYM_FUNC_START to SYM_INNER_LABEL, accidentally
removing 16 byte alignment as SYM_FUNC_START uses SYM_A_ALIGN and
SYM_INNER_LABEL does not. Josh mentioned [1] this was unintentional.

Fix by changing to SYM_INNER_LABEL_ALIGN instead.

[1] https://lore.kernel.org/lkml/Y3adkSe%2FJ70PqUyt@p183

Fixes: 8bd200d23ec4 ("KVM: VMX: Flatten __vmx_vcpu_run()")
Signed-off-by: Jon Kohler <jon@...anix.com>
Suggested-by: Alexey Dobriyan <adobriyan@...il.com>
CC: Josh Poimboeuf <jpoimboe@...nel.org>
---
 arch/x86/kvm/vmx/vmenter.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/vmenter.S b/arch/x86/kvm/vmx/vmenter.S
index 631fd7da2bc3..07e927d4d099 100644
--- a/arch/x86/kvm/vmx/vmenter.S
+++ b/arch/x86/kvm/vmx/vmenter.S
@@ -187,7 +187,7 @@ SYM_FUNC_START(__vmx_vcpu_run)
 	_ASM_EXTABLE(.Lvmresume, .Lfixup)
 	_ASM_EXTABLE(.Lvmlaunch, .Lfixup)
 
-SYM_INNER_LABEL(vmx_vmexit, SYM_L_GLOBAL)
+SYM_INNER_LABEL_ALIGN(vmx_vmexit, SYM_L_GLOBAL)
 
 	/* Restore unwind state from before the VMRESUME/VMLAUNCH. */
 	UNWIND_HINT_RESTORE
-- 
2.30.1 (Apple Git-130)