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From: Serhii Popovych <spopovyc@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: michael@ellerman.id.au, paulus@samba.org,
	linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org,
	david@gibson.dropbear.id.au
Subject: [PATCH 0/4] Fix use after free in HPT resizing code and related minor improvements
Date: Wed, 29 Nov 2017 11:38:22 -0500	[thread overview]
Message-ID: <1511973506-65683-1-git-send-email-spopovyc@redhat.com> (raw)

It is possible to trigger use after free during HPT resize
causing host kernel to crash. More details and analysis of
the problem can be found in change with corresponding subject
(KVM: PPC: Book3S HV: Fix use after free in case of multiple
resize requests).

We need some changes to prepare for the fix, especially
make ->error in HPT resize instance single point for
tracking allocation state, improve kvmppc_allocate_hpt()
and kvmppc_free_hpt() so they can be used more safely.

See individual commit description message to get more
information on changes presented.

Serhii Popovych (4):
  KVM: PPC: Book3S HV: Drop prepare_done from struct kvm_resize_hpt and
    cleanups
  KVM: PPC: Book3S HV: Improve kvmppc_allocate_hpt()/kvmppc_free_hpt()
  KVM: PPC: Book3S HV: Fix use after free in case of multiple resize
    requests
  KVM: PPC: Book3S HV: Remove redundant parameter from
    resize_hpt_release()

 arch/powerpc/kvm/book3s_64_mmu_hv.c | 139 +++++++++++++++++++++---------------
 1 file changed, 82 insertions(+), 57 deletions(-)

-- 
1.8.3.1

WARNING: multiple messages have this Message-ID (diff)
From: Serhii Popovych <spopovyc@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: michael@ellerman.id.au, paulus@samba.org,
	linuxppc-dev@lists.ozlabs.org, kvm-ppc@vger.kernel.org,
	david@gibson.dropbear.id.au
Subject: [PATCH 0/4] Fix use after free in HPT resizing code and related minor improvements
Date: Wed, 29 Nov 2017 16:38:22 +0000	[thread overview]
Message-ID: <1511973506-65683-1-git-send-email-spopovyc@redhat.com> (raw)

It is possible to trigger use after free during HPT resize
causing host kernel to crash. More details and analysis of
the problem can be found in change with corresponding subject
(KVM: PPC: Book3S HV: Fix use after free in case of multiple
resize requests).

We need some changes to prepare for the fix, especially
make ->error in HPT resize instance single point for
tracking allocation state, improve kvmppc_allocate_hpt()
and kvmppc_free_hpt() so they can be used more safely.

See individual commit description message to get more
information on changes presented.

Serhii Popovych (4):
  KVM: PPC: Book3S HV: Drop prepare_done from struct kvm_resize_hpt and
    cleanups
  KVM: PPC: Book3S HV: Improve kvmppc_allocate_hpt()/kvmppc_free_hpt()
  KVM: PPC: Book3S HV: Fix use after free in case of multiple resize
    requests
  KVM: PPC: Book3S HV: Remove redundant parameter from
    resize_hpt_release()

 arch/powerpc/kvm/book3s_64_mmu_hv.c | 139 +++++++++++++++++++++---------------
 1 file changed, 82 insertions(+), 57 deletions(-)

-- 
1.8.3.1


             reply	other threads:[~2017-11-29 16:38 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-29 16:38 Serhii Popovych [this message]
2017-11-29 16:38 ` [PATCH 0/4] Fix use after free in HPT resizing code and related minor improvements Serhii Popovych
2017-11-29 16:38 ` [PATCH 1/4] KVM: PPC: Book3S HV: Drop prepare_done from struct kvm_resize_hpt and cleanups Serhii Popovych
2017-11-29 16:38   ` Serhii Popovych
2017-11-30  3:40   ` David Gibson
2017-11-30  3:40     ` David Gibson
2017-11-29 16:38 ` [PATCH 2/4] KVM: PPC: Book3S HV: Improve kvmppc_allocate_hpt()/kvmppc_free_hpt() Serhii Popovych
2017-11-29 16:38   ` Serhii Popovych
2017-11-30  3:45   ` David Gibson
2017-11-30  3:45     ` David Gibson
2017-11-29 16:38 ` [PATCH 3/4] KVM: PPC: Book3S HV: Fix use after free in case of multiple resize requests Serhii Popovych
2017-11-29 16:38   ` Serhii Popovych
2017-11-30  3:51   ` David Gibson
2017-11-30  3:51     ` David Gibson
2017-11-29 16:38 ` [PATCH 4/4] KVM: PPC: Book3S HV: Remove redundant parameter from resize_hpt_release() Serhii Popovych
2017-11-29 16:38   ` Serhii Popovych
2017-11-30  3:53   ` David Gibson
2017-11-30  3:53     ` David Gibson
2017-11-30  3:54 ` [PATCH 0/4] Fix use after free in HPT resizing code and related minor improvements David Gibson
2017-11-30  3:54   ` David Gibson
2017-12-04  6:10 ` David Gibson
2017-12-04  6:10   ` David Gibson
2017-12-04 12:22   ` Michael Ellerman
2017-12-04 12:22     ` Michael Ellerman
2017-12-04 14:43   ` Serhii Popovych
2017-12-04 14:43     ` Serhii Popovych

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