QEMU patches for 2018-08-20

[Qemu-devel] [PULL 13/36] i386/kvm: initialize struct at full before ioctl call

Paolo Bonzini posted 36 patches 6 years, 5 months ago

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Maintainers: Alistair Francis <Alistair.Francis@wdc.com>, Markus Armbruster <armbru@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Artyom Tarasenko <atar4qemu@gmail.com>, Marcelo Tosatti <mtosatti@redhat.com>, Max Filippov <jcmvbkbc@gmail.com>, Michael Roth <mdroth@linux.vnet.ibm.com>, Greg Kurz <groug@kaod.org>, Laurent Vivier <lvivier@redhat.com>, Guan Xuetao <gxt@mprc.pku.edu.cn>, Peter Maydell <peter.maydell@linaro.org>, David Gibson <david@gibson.dropbear.id.au>, Thomas Huth <thuth@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>, Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>, Kevin Wolf <kwolf@redhat.com>, "Edgar E. Iglesias" <edgar.iglesias@gmail.com>, Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>, Aleksandar Markovic <amarkovic@wavecomp.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Juan Quintela <quintela@redhat.com>, Fam Zheng <fam@euphon.net>, Michael Walle <michael@walle.cc>, Aurelien Jarno <aurelien@aurel32.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Alberto Garcia <berto@igalia.com>, Richard Henderson <rth@twiddle.net>, Marek Vasut <marex@denx.de>, Bastian Koppelmann <kbastian@mail.uni-paderborn.de>, Paolo Bonzini <pbonzini@redhat.com>, Max Reitz <mreitz@redhat.com>, Aleksandar Rikalo <arikalo@wavecomp.com>, Sagar Karandikar <sagark@eecs.berkeley.edu>, Palmer Dabbelt <palmer@sifive.com>, Chris Wulff <crwulff@gmail.com>, Kamil Rytarowski <kamil@netbsd.org>

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[Qemu-devel] [PULL 13/36] i386/kvm: initialize struct at full before ioctl call

Posted by Paolo Bonzini 6 years, 5 months ago

From: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>

Not the whole structure is initialized before passing it to the KVM.
Reduce the number of Valgrind reports.

Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Message-Id: <1564502498-805893-4-git-send-email-andrey.shinkevich@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/kvm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index a66b956..ce3f1c3 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -190,6 +190,7 @@ static int kvm_get_tsc(CPUState *cs)
         return 0;
     }
 
+    memset(&msr_data, 0, sizeof(msr_data));
     msr_data.info.nmsrs = 1;
     msr_data.entries[0].index = MSR_IA32_TSC;
     env->tsc_valid = !runstate_is_running();
@@ -1706,6 +1707,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
 
     if (has_xsave) {
         env->xsave_buf = qemu_memalign(4096, sizeof(struct kvm_xsave));
+        memset(env->xsave_buf, 0, sizeof(struct kvm_xsave));
     }
 
     max_nested_state_len = kvm_max_nested_state_length();
@@ -3488,6 +3490,7 @@ static int kvm_put_debugregs(X86CPU *cpu)
         return 0;
     }
 
+    memset(&dbgregs, 0, sizeof(dbgregs));
     for (i = 0; i < 4; i++) {
         dbgregs.db[i] = env->dr[i];
     }
-- 
1.8.3.1