qemu: Limit backing chain to max 200 layers (blockdev-add saga)

[libvirt] [PATCH 0/2] qemu: Limit backing chain to max 200 layers (blockdev-add saga)

Peter Krempa posted 2 patches 4 years, 7 months ago

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git fetch https://github.com/patchew-project/libvirt tags/patchew/cover.1567611165.git.pkrempa@redhat.com

src/qemu/qemu_domain.c | 91 +++++++++++++++++++++++++++++++-----------
src/qemu/qemu_domain.h |  4 ++
src/qemu/qemu_driver.c |  6 +++
3 files changed, 78 insertions(+), 23 deletions(-)

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[libvirt] [PATCH 0/2] qemu: Limit backing chain to max 200 layers (blockdev-add saga)

Posted by Peter Krempa 4 years, 7 months ago

More than 256 deep element tree break with our XML parser. Backing
chains are one of the simple ways to get there. Forbid them. Note that
the practical limit/sane approach is way less than 200.

Peter Krempa (2):
  qemu: domain: Refactor cleanup in qemuDomainDetermineDiskChain
  qemu: Prevent storage causing too much nested XML

 src/qemu/qemu_domain.c | 91 +++++++++++++++++++++++++++++++-----------
 src/qemu/qemu_domain.h |  4 ++
 src/qemu/qemu_driver.c |  6 +++
 3 files changed, 78 insertions(+), 23 deletions(-)

-- 
2.21.0

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