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Description: KVM: SVM: avoid infinite loop on NPF from bad address
References:
 https://lore.kernel.org/stable/YL70kh5%2FvLW8gmAY@eldamar.lan/
Notes:
 bwh> Appears to have been introduced in 4.17 by commit 00b10fe1046c
 bwh> "KVM: X86: Restart the guest when insn_len is zero and SEV is enabled".
Bugs:
upstream: released (5.8-rc1) [e72436bc3a5206f95bb384e741154166ddb3202e]
5.10-upstream-stable: N/A "Fixed before branching point"
4.19-upstream-stable: needed
4.9-upstream-stable: N/A "Vulnerability introduced later"
sid: released (5.8.7-1)
4.19-buster-security: needed
4.9-stretch-security: N/A "Vulnerability introduced later"

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