Commit 04343ae3 authored Jun 22, 2020 by James Morse Committed by Marc Zyngier Jul 05, 2020

KVM: arm64: Tolerate an empty target_table list



Before emptying the target_table lists, and then removing their
infrastructure, add some tolerance to an empty list.

Instead of bugging-out on an empty list, pretend we already
reached the end in the two-list-walk.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200622113317.20477-3-james.morse@arm.com

parent 6b33e0d6

arch/arm64/kvm/sys_regs.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -2809,7 +2809,10 @@ static int walk_sys_regs(struct kvm_vcpu vcpu, u64 __user uind)
		i2 = sys_reg_descs;
		end2 = sys_reg_descs + ARRAY_SIZE(sys_reg_descs);

		BUG_ON(i1 == end1 \|\| i2 == end2);
		if (i1 == end1)
		i1 = NULL;

		BUG_ON(i2 == end2);

		/* Walk carefully, as both tables may refer to the same register. */
		while (i1 \|\| i2) {

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