linux-kernel - [PATCH] KVM: guest_memfd: Drop a superfluous local var in kvm_gmem_fault_user

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: <20251007222733.349460-1-seanjc@google.com>
Date: Tue,  7 Oct 2025 15:27:33 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH] KVM: guest_memfd: Drop a superfluous local var in kvm_gmem_fault_user_mapping()

Drop the local "int err" that's buried in the middle guest_memfd's user
fault handler to avoid the potential for variable shadowing, e.g. if an
"err" variable were also declared at function scope.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 virt/kvm/guest_memfd.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c
index 94bafd6c558c..abbec01d7a3a 100644
--- a/virt/kvm/guest_memfd.c
+++ b/virt/kvm/guest_memfd.c
@@ -330,12 +330,10 @@ static vm_fault_t kvm_gmem_fault_user_mapping(struct vm_fault *vmf)
 
 	folio = kvm_gmem_get_folio(inode, vmf->pgoff);
 	if (IS_ERR(folio)) {
-		int err = PTR_ERR(folio);
-
-		if (err == -EAGAIN)
+		if (PTR_ERR(folio) == -EAGAIN)
 			return VM_FAULT_RETRY;
 
-		return vmf_error(err);
+		return vmf_error(PTR_ERR(folio));
 	}
 
 	if (WARN_ON_ONCE(folio_test_large(folio))) {

base-commit: 6b36119b94d0b2bb8cea9d512017efafd461d6ac
-- 
2.51.0.710.ga91ca5db03-goog