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, pgdp0000000107c9f000
[0000000000000120] pgd0000000000000000, p4d0000000000000000
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)
Publication date: Thu, 30 May 2024 16:15:00 +0000