Sean Christopherson 5c9ca4ed89 KVM: Check validity of offset+length of gfn_to_pfn_cache prior to activation ... When activating a gfn_to_pfn_cache, verify that the offset+length is sane and usable before marking the cache active. Letting __kvm_gpc_refresh() detect the problem results in a cache being marked active without setting the GPA (or any other fields), which in turn results in KVM trying to refresh a cache with INVALID_GPA. Attempting to refresh a cache with INVALID_GPA isn't functionally problematic, but it runs afoul of the sanity check that exactly one of GPA or userspace HVA is valid, i.e. that a cache is either GPA-based or HVA-based. Reported-by: syzbot+106a4f72b0474e1d1b33@syzkaller.appspotmail.com Closes: https://lore.kernel.org/all/0000000000005fa5cc0613f1cebd@google.com Fixes: 721f5b0dda ("KVM: pfncache: allow a cache to be activated with a fixed (userspace) HVA") Cc: David Woodhouse <dwmw2@infradead.org> Cc: Paul Durrant <paul@xen.org> Reviewed-by: Paul Durrant <paul@xen.org> Reviewed-by: David Woodhouse <dwmw@amazon.co.uk> Link: https://lore.kernel.org/r/20240320001542.3203871-3-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>		2024-04-08 13:20:24 -07:00
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kvm	KVM: Check validity of offset+length of gfn_to_pfn_cache prior to activation	2024-04-08 13:20:24 -07:00
lib	Revert "irqbypass: do not start cons/prod when failed connect"	2021-05-15 10:26:55 +01:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00