CVE-2024-36884

In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu: Use the correct type in nvidia_smmu_context_fault()

This was missed because of the function pointer indirection.

nvidia_smmu_context_fault() is also installed as a irq function, and the

'void *' was changed to a struct arm_smmu_domain. Since the iommu_domain

is embedded at a non-zero offset this causes nvidia_smmu_context_fault()

to miscompute the offset. Fixup the types.

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000120

Mem abort info:

ESR = 0x0000000096000004

EC = 0x25: DABT (current EL), IL = 32 bits

SET = 0, FnV = 0

EA = 0, S1PTW = 0

FSC = 0x04: level 0 translation fault

Data abort info:

ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000

CM = 0, WnR = 0, TnD = 0, TagAccess = 0

GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0

user pgtable: 4k pages, 48-bit VAs, pgdp=0000000107c9f000

[0000000000000120] pgd=0000000000000000, p4d=0000000000000000

Internal error: Oops: 0000000096000004 [#1] SMP

Modules linked in:

CPU: 1 PID: 47 Comm: kworker/u25:0 Not tainted 6.9.0-0.rc7.58.eln136.aarch64 #1

Hardware name: Unknown NVIDIA Jetson Orin NX/NVIDIA Jetson Orin NX, BIOS 3.1-32827747 03/19/2023

Workqueue: events_unbound deferred_probe_work_func

pstate: 604000c9 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : nvidia_smmu_context_fault+0x1c/0x158

lr : __free_irq+0x1d4/0x2e8

sp : ffff80008044b6f0

x29: ffff80008044b6f0 x28: ffff000080a60b18 x27: ffffd32b5172e970

x26: 0000000000000000 x25: ffff0000802f5aac x24: ffff0000802f5a30

x23: ffff0000802f5b60 x22: 0000000000000057 x21: 0000000000000000

x20: ffff0000802f5a00 x19: ffff000087d4cd80 x18: ffffffffffffffff

x17: 6234362066666666 x16: 6630303078302d30 x15: ffff00008156d888

x14: 0000000000000000 x13: ffff0000801db910 x12: ffff00008156d6d0

x11: 0000000000000003 x10: ffff0000801db918 x9 : ffffd32b50f94d9c

x8 : 1fffe0001032fda1 x7 : ffff00008197ed00 x6 : 000000000000000f

x5 : 000000000000010e x4 : 000000000000010e x3 : 0000000000000000

x2 : ffffd32b51720cd8 x1 : ffff000087e6f700 x0 : 0000000000000057

Call trace:

nvidia_smmu_context_fault+0x1c/0x158

__free_irq+0x1d4/0x2e8

free_irq+0x3c/0x80

devm_free_irq+0x64/0xa8

arm_smmu_domain_free+0xc4/0x158

iommu_domain_free+0x44/0xa0

iommu_deinit_device+0xd0/0xf8

__iommu_group_remove_device+0xcc/0xe0

iommu_bus_notifier+0x64/0xa8

notifier_call_chain+0x78/0x148

blocking_notifier_call_chain+0x4c/0x90

bus_notify+0x44/0x70

device_del+0x264/0x3e8

pci_remove_bus_device+0x84/0x120

pci_remove_root_bus+0x5c/0xc0

dw_pcie_host_deinit+0x38/0xe0

tegra_pcie_config_rp+0xc0/0x1f0

tegra_pcie_dw_probe+0x34c/0x700

platform_probe+0x70/0xe8

really_probe+0xc8/0x3a0

__driver_probe_device+0x84/0x160

driver_probe_device+0x44/0x130

__device_attach_driver+0xc4/0x170

bus_for_each_drv+0x90/0x100

__device_attach+0xa8/0x1c8

device_initial_probe+0x1c/0x30

bus_probe_device+0xb0/0xc0

deferred_probe_work_func+0xbc/0x120

process_one_work+0x194/0x490

worker_thread+0x284/0x3b0

kthread+0xf4/0x108

ret_from_fork+0x10/0x20

Code: a9b97bfd 910003fd a9025bf5 f85a0035 (b94122a1)