linux-kernel - [PATCH AUTOSEL 6.3 02/18] KVM: selftests: Add 'malloc' failure check in vcpu_save

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Date:   Tue,  9 May 2023 17:19:10 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Ivan Orlov <ivan.orlov0322@...il.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Sasha Levin <sashal@...nel.org>, pbonzini@...hat.com,
        shuah@...nel.org, dmatlack@...gle.com, vannapurve@...gle.com,
        kvm@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH AUTOSEL 6.3 02/18] KVM: selftests: Add 'malloc' failure check in vcpu_save_state

From: Ivan Orlov <ivan.orlov0322@...il.com>

[ Upstream commit 735b0e0f2d001b7ed9486db84453fb860e764a4d ]

There is a 'malloc' call in vcpu_save_state function, which can
be unsuccessful. This patch will add the malloc failure checking
to avoid possible null dereference and give more information
about test fail reasons.

Signed-off-by: Ivan Orlov <ivan.orlov0322@...il.com>
Link: https://lore.kernel.org/r/20230322144528.704077-1-ivan.orlov0322@gmail.com
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/testing/selftests/kvm/lib/x86_64/processor.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index c39a4353ba194..827647ff3d41b 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -954,6 +954,7 @@ struct kvm_x86_state *vcpu_save_state(struct kvm_vcpu *vcpu)
 	vcpu_run_complete_io(vcpu);
 
 	state = malloc(sizeof(*state) + msr_list->nmsrs * sizeof(state->msrs.entries[0]));
+	TEST_ASSERT(state, "-ENOMEM when allocating kvm state");
 
 	vcpu_events_get(vcpu, &state->events);
 	vcpu_mp_state_get(vcpu, &state->mp_state);
-- 
2.39.2