[ Sasha's backport helper bot ]
Hi,
The upstream commit SHA1 provided is correct: 7fe28d7e68f92cc3d0668b8f2fbdf5c303ac3022
Status in newer kernel trees:
6.12.y | Not found
6.11.y | Not found
6.6.y | Not found
6.1.y | Not found
5.15.y | Not found
Note: The patch differs from the upstream commit:
---
1: 7fe28d7e68f92 ! 1: e7bc6980df78e KVM: arm64: vgic-its: Add a data length check in vgic_its_save_*
@@ Metadata
## Commit message ##
KVM: arm64: vgic-its: Add a data length check in vgic_its_save_*
+ commit 7fe28d7e68f92cc3d0668b8f2fbdf5c303ac3022 upstream.
+
In all the vgic_its_save_*() functinos, they do not check whether
the data length is 8 bytes before calling vgic_write_guest_lock.
This patch adds the check. To prevent the kernel from being blown up
@@ arch/arm64/kvm/vgic/vgic-its.c: static int vgic_its_save_ite(struct vgic_its *it
((u64)ite->irq->intid << KVM_ITS_ITE_PINTID_SHIFT) |
ite->collection->collection_id;
val = cpu_to_le64(val);
-- return vgic_write_guest_lock(kvm, gpa, &val, ite_esz);
+- return kvm_write_guest_lock(kvm, gpa, &val, ite_esz);
+
+ return vgic_its_write_entry_lock(its, gpa, val, ite_esz);
}
@@ arch/arm64/kvm/vgic/vgic-its.c: static int vgic_its_save_dte(struct vgic_its *it
(itt_addr_field << KVM_ITS_DTE_ITTADDR_SHIFT) |
(dev->num_eventid_bits - 1));
val = cpu_to_le64(val);
-- return vgic_write_guest_lock(kvm, ptr, &val, dte_esz);
+- return kvm_write_guest_lock(kvm, ptr, &val, dte_esz);
+
+ return vgic_its_write_entry_lock(its, ptr, val, dte_esz);
}
@@ arch/arm64/kvm/vgic/vgic-its.c: static int vgic_its_save_cte(struct vgic_its *it
((u64)collection->target_addr << KVM_ITS_CTE_RDBASE_SHIFT) |
collection->collection_id);
val = cpu_to_le64(val);
-- return vgic_write_guest_lock(its->dev->kvm, gpa, &val, esz);
+- return kvm_write_guest_lock(its->dev->kvm, gpa, &val, esz);
+
+ return vgic_its_write_entry_lock(its, gpa, val, esz);
}
- /*
+ static int vgic_its_restore_cte(struct vgic_its *its, gpa_t gpa, int esz)
@@ arch/arm64/kvm/vgic/vgic-its.c: static int vgic_its_restore_cte(struct vgic_its *its, gpa_t gpa, int esz)
u64 val;
int ret;
@@ arch/arm64/kvm/vgic/vgic-its.c: static int vgic_its_save_collection_table(struct
*/
- val = 0;
- BUG_ON(cte_esz > sizeof(val));
-- ret = vgic_write_guest_lock(its->dev->kvm, gpa, &val, cte_esz);
+- ret = kvm_write_guest_lock(its->dev->kvm, gpa, &val, cte_esz);
- return ret;
+ return vgic_its_write_entry_lock(its, gpa, 0, cte_esz);
}
- /*
+ /**
## arch/arm64/kvm/vgic/vgic.h ##
-@@ arch/arm64/kvm/vgic/vgic.h: static inline int vgic_write_guest_lock(struct kvm *kvm, gpa_t gpa,
- return ret;
+@@
+ #define __KVM_ARM_VGIC_NEW_H__
+
+ #include <linux/irqchip/arm-gic-common.h>
++#include <asm/kvm_mmu.h>
+
+ #define PRODUCT_ID_KVM 0x4b /* ASCII code K */
+ #define IMPLEMENTER_ARM 0x43b
+@@ arch/arm64/kvm/vgic/vgic.h: static inline bool vgic_irq_is_multi_sgi(struct vgic_irq *irq)
+ return vgic_irq_get_lr_count(irq) > 1;
}
+static inline int vgic_its_read_entry_lock(struct vgic_its *its, gpa_t eaddr,
@@ arch/arm64/kvm/vgic/vgic.h: static inline int vgic_write_guest_lock(struct kvm *
+ if (KVM_BUG_ON(esize != sizeof(eval), kvm))
+ return -EINVAL;
+
-+ return vgic_write_guest_lock(kvm, eaddr, &eval, esize);
++ return kvm_write_guest_lock(kvm, eaddr, &eval, esize);
+}
+
/*
---
Results of testing on various branches:
| Branch | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.15.y | Success | Success |
