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| author | Zhenzhong Duan <zhenzhong.duan@intel.com> | 2026-05-09 05:43:45 +0300 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2026-05-11 11:19:36 +0300 |
| commit | a6dea58d8625c06b9654c0555f101742481335c3 (patch) | |
| tree | 97d4d6fbd56fa366264751c014b06f7ccad53319 /drivers/gpu/tests/git@radix-linux.su:pub | |
| parent | 2cda2e10dc8343ae01eae9e999a876b7e7d37861 (diff) | |
| download | linux-a6dea58d8625c06b9654c0555f101742481335c3.tar.xz | |
iommu/vt-d: Fix oops due to out of scope access
Below oops triggers when kill QEMU process:
Oops: general protection fault, probably for non-canonical address 0x7fffffff844eaaa7: 0000 [#1] SMP NOPTI
Call Trace:
<TASK>
do_raw_spin_lock+0xaa/0xc0
_raw_spin_lock_irqsave+0x21/0x40
domain_remove_dev_pasid+0x52/0x160
intel_nested_set_dev_pasid+0x1b9/0x1e0
__iommu_set_group_pasid+0x56/0x120
pci_dev_reset_iommu_done+0xe3/0x180
pcie_flr+0x65/0x160
__pci_reset_function_locked+0x5b/0x120
vfio_pci_core_close_device+0x63/0xe0 [vfio_pci_core]
vfio_df_close+0x4f/0xa0
vfio_df_unbind_iommufd+0x2d/0x60
vfio_device_fops_release+0x3e/0x40
__fput+0xe5/0x2c0
task_work_run+0x58/0xa0
do_exit+0x2c8/0x600
do_group_exit+0x2f/0xa0
get_signal+0x863/0x8c0
arch_do_signal_or_restart+0x24/0x100
exit_to_user_mode_loop+0x87/0x380
do_syscall_64+0x2ff/0x11e0
entry_SYSCALL_64_after_hwframe+0x76/0x7e
The global static blocked domain is a dummy domain without corresponding
dmar_domain structure, accessing beyond iommu_domain structure triggers
oops easily. Fix it by return early in domain_remove_dev_pasid() like
identity domain.
Fixes: 7d0c9da6c150 ("iommu/vt-d: Add set_dev_pasid callback for dma domain")
Cc: stable@vger.kernel.org
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20260421031347.1408890-1-zhenzhong.duan@intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/gpu/tests/git@radix-linux.su:pub')
0 files changed, 0 insertions, 0 deletions