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authorZenghui Yu <yuzenghui@huawei.com>2020-04-14 11:03:48 +0800
committerMarc Zyngier <maz@kernel.org>2020-04-23 16:26:56 +0100
commit57bdb436ce869a45881d8aa4bc5dac8e072dd2b6 (patch)
treec3ef73b2a34540ec32b1195025b0f8a5d18ed4d3 /virt
parent969ce8b5260d8ec01e6f1949d2927a86419663ce (diff)
downloadlinux-57bdb436ce869a45881d8aa4bc5dac8e072dd2b6.tar.gz
KVM: arm64: vgic-its: Fix memory leak on the error path of vgic_add_lpi()
If we're going to fail out the vgic_add_lpi(), let's make sure the allocated vgic_irq memory is also freed. Though it seems that both cases are unlikely to fail. Signed-off-by: Zenghui Yu <yuzenghui@huawei.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20200414030349.625-3-yuzenghui@huawei.com
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic/vgic-its.c11
1 files changed, 9 insertions, 2 deletions
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index d53d34a33e35..c012a52b19f5 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -96,14 +96,21 @@ out_unlock:
* We "cache" the configuration table entries in our struct vgic_irq's.
* However we only have those structs for mapped IRQs, so we read in
* the respective config data from memory here upon mapping the LPI.
+ *
+ * Should any of these fail, behave as if we couldn't create the LPI
+ * by dropping the refcount and returning the error.
*/
ret = update_lpi_config(kvm, irq, NULL, false);
- if (ret)
+ if (ret) {
+ vgic_put_irq(kvm, irq);
return ERR_PTR(ret);
+ }
ret = vgic_v3_lpi_sync_pending_status(kvm, irq);
- if (ret)
+ if (ret) {
+ vgic_put_irq(kvm, irq);
return ERR_PTR(ret);
+ }
return irq;
}