From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: mlevitsk@redhat.com, seanjc@google.com
Subject: [PATCH 0/2] KVM: x86: never write to memory from kvm_vcpu_check_block
Date: Wed, 27 Apr 2022 13:37:55 -0400 [thread overview]
Message-ID: <20220427173758.517087-1-pbonzini@redhat.com> (raw)
Maxim reported the following backtrace:
[ 1355.807187] kvm_vcpu_map+0x159/0x190 [kvm]
[ 1355.807628] nested_svm_vmexit+0x4c/0x7f0 [kvm_amd]
[ 1355.808036] ? kvm_vcpu_block+0x54/0xa0 [kvm]
[ 1355.808450] svm_check_nested_events+0x97/0x390 [kvm_amd]
[ 1355.808920] kvm_check_nested_events+0x1c/0x40 [kvm]
[ 1355.809396] kvm_arch_vcpu_runnable+0x4e/0x190 [kvm]
[ 1355.809892] kvm_vcpu_check_block+0x4f/0x100 [kvm]
[ 1355.811259] kvm_vcpu_block+0x6b/0xa0 [kvm]
due to kmap being called in non-sleepable (!TASK_RUNNING) context.
Fix it by extending kvm_x86_ops->nested_ops.hv_timer_pending and
getting rid of one annoying instance of kvm_check_nested_events.
Paolo
next reply other threads:[~2022-04-27 17:38 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-27 17:37 Paolo Bonzini [this message]
2022-04-27 17:37 ` [PATCH 1/3] KVM: x86: make vendor code check for all nested events Paolo Bonzini
2022-04-27 20:40 ` Maxim Levitsky
2022-04-29 18:40 ` Paolo Bonzini
2022-04-29 17:03 ` Sean Christopherson
2022-04-29 17:09 ` Paolo Bonzini
2022-04-29 17:35 ` Sean Christopherson
2022-04-27 17:37 ` [PATCH 2/3] KVM: x86: a vCPU with a pending triple fault is runnable Paolo Bonzini
2022-04-27 20:41 ` Maxim Levitsky
2022-04-27 17:37 ` [PATCH 3/3] KVM: x86: never write to memory from kvm_vcpu_check_block Paolo Bonzini
2022-04-27 20:42 ` Maxim Levitsky
2022-07-20 9:31 ` [PATCH 0/2] " Maxim Levitsky
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