From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7756619CD1E for ; Mon, 24 Jun 2024 15:11:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719241901; cv=none; b=d60DZjZb9mz0ZgLL/N7cR/v5GVNz3GMx2AhyRP3efc3sEbI2l7aOVRHLo5R4vLM25JGXCFUKfYRQ9DkL/beBMKkQM5rGFV7vny5sfshhETLGRZQODA5T2VVlyJ21DrJCdOqIirJkvxBNEQhfQhGKx8VZo0UX/9waRVsNJaUfX0M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719241901; c=relaxed/simple; bh=+aiLDYK8gjA2uakXjYNr+VU18Yyo7H8ZPRvdwZfqVRQ=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=P1aLGAP/Ig7/2SbVykKSj4ayHb7BjnEpbA87Jc9zKr9FwvlKzslGXM36OfyFn4toX+zlQQI1UTey4FlfNvPbJ6YUuMuV/QJu+Y9hTKP0C9bZac8jeDn4a/zL7QnWQNzu8sY7Izg5e1ffv1j0BuM8M846UEivZaalfTfHvXPX/ZE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=m0uWPFV3; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="m0uWPFV3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AC171C32782; Mon, 24 Jun 2024 15:11:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1719241901; bh=+aiLDYK8gjA2uakXjYNr+VU18Yyo7H8ZPRvdwZfqVRQ=; h=Subject:To:Cc:From:Date:From; b=m0uWPFV3ezSm/NYs/vsRE7XUkaHD+SMzHP6fUBoQ5rJlc4D9sOaAkbn8TCUybm39x o+u6R9jEoCsYJkyXImY7BVddU2SwdcuOCu/6myXzFRVJxLy8+TnNnT8/sWM5hlRPEK RmSOb2aAUZtXCO6tNT3teOa8FLQj60dsVizFTNfg= Subject: FAILED: patch "[PATCH] KVM: arm64: Disassociate vcpus from redistributor region on" failed to apply to 5.15-stable tree To: maz@kernel.org,glider@google.com,oliver.upton@linux.dev Cc: From: Date: Mon, 24 Jun 2024 17:11:38 +0200 Message-ID: <2024062438-dean-sacrifice-9c3b@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 0d92e4a7ffd5c42b9fa864692f82476c0bf8bcc8 # git commit -s git send-email --to '' --in-reply-to '2024062438-dean-sacrifice-9c3b@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 0d92e4a7ffd5c42b9fa864692f82476c0bf8bcc8 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Wed, 5 Jun 2024 18:56:37 +0100 Subject: [PATCH] KVM: arm64: Disassociate vcpus from redistributor region on teardown When tearing down a redistributor region, make sure we don't have any dangling pointer to that region stored in a vcpu. Fixes: e5a35635464b ("kvm: arm64: vgic-v3: Introduce vgic_v3_free_redist_region()") Reported-by: Alexander Potapenko Reviewed-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20240605175637.1635653-1-maz@kernel.org Cc: stable@vger.kernel.org diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c index 8f5b7a3e7009..7f68cf58b978 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -391,7 +391,7 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm) if (dist->vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3) { list_for_each_entry_safe(rdreg, next, &dist->rd_regions, list) - vgic_v3_free_redist_region(rdreg); + vgic_v3_free_redist_region(kvm, rdreg); INIT_LIST_HEAD(&dist->rd_regions); } else { dist->vgic_cpu_base = VGIC_ADDR_UNDEF; diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c index a3983a631b5a..9e50928f5d7d 100644 --- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c +++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c @@ -919,8 +919,19 @@ static int vgic_v3_alloc_redist_region(struct kvm *kvm, uint32_t index, return ret; } -void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg) +void vgic_v3_free_redist_region(struct kvm *kvm, struct vgic_redist_region *rdreg) { + struct kvm_vcpu *vcpu; + unsigned long c; + + lockdep_assert_held(&kvm->arch.config_lock); + + /* Garbage collect the region */ + kvm_for_each_vcpu(c, vcpu, kvm) { + if (vcpu->arch.vgic_cpu.rdreg == rdreg) + vcpu->arch.vgic_cpu.rdreg = NULL; + } + list_del(&rdreg->list); kfree(rdreg); } @@ -945,7 +956,7 @@ int vgic_v3_set_redist_base(struct kvm *kvm, u32 index, u64 addr, u32 count) mutex_lock(&kvm->arch.config_lock); rdreg = vgic_v3_rdist_region_from_index(kvm, index); - vgic_v3_free_redist_region(rdreg); + vgic_v3_free_redist_region(kvm, rdreg); mutex_unlock(&kvm->arch.config_lock); return ret; } diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h index 6106ebd5ba42..03d356a12377 100644 --- a/arch/arm64/kvm/vgic/vgic.h +++ b/arch/arm64/kvm/vgic/vgic.h @@ -316,7 +316,7 @@ vgic_v3_rd_region_size(struct kvm *kvm, struct vgic_redist_region *rdreg) struct vgic_redist_region *vgic_v3_rdist_region_from_index(struct kvm *kvm, u32 index); -void vgic_v3_free_redist_region(struct vgic_redist_region *rdreg); +void vgic_v3_free_redist_region(struct kvm *kvm, struct vgic_redist_region *rdreg); bool vgic_v3_rdist_overlap(struct kvm *kvm, gpa_t base, size_t size);