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KVM: arm64: Fail the idreg iterator if idregs aren't initialized

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Return an error to userspace if the VM's ID register values haven't been
initialized in preparation for changing the debugfs file initialization
order.

Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240227094115.1723330-2-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Oliver Upton 2024-02-27 09:41:14 +00:00
parent 99101dda29
commit 29ef55cec3
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/kvm/sys_regs.c
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@ -3431,7 +3431,8 @@ static void *idregs_debug_start(struct seq_file *s, loff_t *pos)
mutex_lock(&kvm->arch.config_lock);
iter = &kvm->arch.idreg_debugfs_iter;
if (*iter == (u8)~0) {
if (test_bit(KVM_ARCH_FLAG_ID_REGS_INITIALIZED, &kvm->arch.flags) &&
*iter == (u8)~0) {
*iter = *pos;
if (*iter >= KVM_ARM_ID_REG_NUM)
iter = NULL;