vmm: handle malformed balloon actual from guest - #7903
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The actual size of the balloon is taken directly from the guest. A misbehaving guest can set it to an arbitrary value and cause underflow on the next vm.info call. Use a saturation_sub instead to avoid a panic in a debug build or a crazy number in a release build. Signed-off-by: Dylan Reid <[email protected]>
rbradford
approved these changes
Mar 26, 2026
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The actual size of the balloon is taken directly from the guest. A misbehaving guest can set it to an arbitrary value and cause underflow on the next vm.info call. Use a saturation_sub instead to avoid a panic in a debug build or a crazy number in a release build.