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| author | Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com> | 2025-04-03 12:22:12 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-04-20 10:15:09 +0200 |
| commit | a0842539e8ef9386c070156103aff888e558a60c (patch) | |
| tree | 88e9a928f260cfec260b9ad9fc2447aed3bd9351 /kernel/events | |
| parent | 5efd53900acc658ac0570cddd2078a772ad3b269 (diff) | |
| download | linux-a0842539e8ef9386c070156103aff888e558a60c.tar.gz linux-a0842539e8ef9386c070156103aff888e558a60c.tar.bz2 linux-a0842539e8ef9386c070156103aff888e558a60c.zip | |
iommu/mediatek: Fix NULL pointer deference in mtk_iommu_device_group
[ Upstream commit 38e8844005e6068f336a3ad45451a562a0040ca1 ]
Currently, mtk_iommu calls during probe iommu_device_register before
the hw_list from driver data is initialized. Since iommu probing issue
fix, it leads to NULL pointer dereference in mtk_iommu_device_group when
hw_list is accessed with list_first_entry (not null safe).
So, change the call order to ensure iommu_device_register is called
after the driver data are initialized.
Fixes: 9e3a2a643653 ("iommu/mediatek: Adapt sharing and non-sharing pgtable case")
Fixes: bcb81ac6ae3c ("iommu: Get DT/ACPI parsing into the proper probe path")
Reviewed-by: Yong Wu <yong.wu@mediatek.com>
Tested-by: Chen-Yu Tsai <wenst@chromium.org> # MT8183 Juniper, MT8186 Tentacruel
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Link: https://lore.kernel.org/r/20250403-fix-mtk-iommu-error-v2-1-fe8b18f8b0a8@collabora.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'kernel/events')
0 files changed, 0 insertions, 0 deletions