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wifi: mt76: mt7921: fix use after free in mt7921_acpi_read()
Don't dereference "sar_root" after it has been freed.
Fixes: f965333e49
("mt76: mt7921: introduce ACPI SAR support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
parent
b5ee771c84
commit
e7de4b4979
1 changed files with 4 additions and 1 deletions
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@ -13,6 +13,7 @@ mt7921_acpi_read(struct mt7921_dev *dev, u8 *method, u8 **tbl, u32 *len)
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acpi_handle root, handle;
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acpi_status status;
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u32 i = 0;
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int ret;
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root = ACPI_HANDLE(mdev->dev);
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if (!root)
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@ -52,9 +53,11 @@ mt7921_acpi_read(struct mt7921_dev *dev, u8 *method, u8 **tbl, u32 *len)
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*(*tbl + i) = (u8)sar_unit->integer.value;
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}
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free:
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ret = (i == sar_root->package.count) ? 0 : -EINVAL;
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kfree(sar_root);
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return (i == sar_root->package.count) ? 0 : -EINVAL;
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return ret;
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}
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/* MTCL : Country List Table for 6G band */
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