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authorPaolo Bonzini <pbonzini@redhat.com>2021-11-22 18:24:01 -0500
committerPaolo Bonzini <pbonzini@redhat.com>2021-11-26 06:43:28 -0500
commit5f25e71e311478f9bb0a8ef49e7d8b95316491d7 (patch)
treec811a827d59320bb082121ee453c640e48d13aa3 /virt
parent8503fea6761de32b72585001ac94e5f81ce8ca44 (diff)
downloadlinux-5f25e71e311478f9bb0a8ef49e7d8b95316491d7.tar.bz2
KVM: downgrade two BUG_ONs to WARN_ON_ONCE
This is not an unrecoverable situation. Users of kvm_read_guest_offset_cached and kvm_write_guest_offset_cached must expect the read/write to fail, and therefore it is possible to just return early with an error value. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 6c5083f2eb50..72c4e6b39389 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2931,7 +2931,8 @@ int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
int r;
gpa_t gpa = ghc->gpa + offset;
- BUG_ON(len + offset > ghc->len);
+ if (WARN_ON_ONCE(len + offset > ghc->len))
+ return -EINVAL;
if (slots->generation != ghc->generation) {
if (__kvm_gfn_to_hva_cache_init(slots, ghc, ghc->gpa, ghc->len))
@@ -2968,7 +2969,8 @@ int kvm_read_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
int r;
gpa_t gpa = ghc->gpa + offset;
- BUG_ON(len + offset > ghc->len);
+ if (WARN_ON_ONCE(len + offset > ghc->len))
+ return -EINVAL;
if (slots->generation != ghc->generation) {
if (__kvm_gfn_to_hva_cache_init(slots, ghc, ghc->gpa, ghc->len))