[PATCH v5.5 22/30] KVM: Move WARN on invalid memslot index to update_memslots()
Sean Christopherson <[email protected]>
| Newsgroups | org.kernel.vger.kvm-ppc,dev.linux.lists.kvmarm,org.infradead.lists.kvm-riscv,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-riscv,org.kernel.vger.kvm,org.kernel.vger.linux-kernel,org.kernel.vger.linux-mips |
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From: Maciej S. Szmigiero <[email protected]> Since kvm_memslot_move_forward() can theoretically return a negative memslot index even when kvm_memslot_move_backward() returned a positive one (and so did not WARN) let's just move the warning to the common code. Signed-off-by: Maciej S. Szmigiero <[email protected]> Reviewed-by: Claudio Imbrenda <[email protected]> Reviewed-by: Sean Christopherson <[email protected]> Signed-off-by: Sean Christopherson <[email protected]> --- virt/kvm/kvm_main.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index a2d51ce957e1..d45d574a5a2d 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1307,8 +1307,7 @@ static inline int kvm_memslot_move_backward(struct kvm_memslots *slots, struct kvm_memory_slot *mslots = slots->memslots; int i; - if (WARN_ON_ONCE(slots->id_to_index[memslot->id] = -1) || - WARN_ON_ONCE(!slots->used_slots)) + if (slots->id_to_index[memslot->id] = -1 || !slots->used_slots) return -1; /* @@ -1412,6 +1411,9 @@ static void update_memslots(struct kvm_memslots *slots, i = kvm_memslot_move_backward(slots, memslot); i = kvm_memslot_move_forward(slots, memslot, i); + if (WARN_ON_ONCE(i < 0)) + return; + /* * Copy the memslot to its new position in memslots and update * its index accordingly. -- 2.33.1.1089.g2158813163f-goog