gsd-2021-47195
Vulnerability from gsd
Modified
2024-04-03 05:03
Details
In the Linux kernel, the following vulnerability has been resolved:
spi: fix use-after-free of the add_lock mutex
Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on
SPI buses") introduced a per-controller mutex. But mutex_unlock() of
said lock is called after the controller is already freed:
spi_unregister_controller(ctlr)
-> put_device(&ctlr->dev)
-> spi_controller_release(dev)
-> mutex_unlock(&ctrl->add_lock)
Move the put_device() after the mutex_unlock().
Aliases
{
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: fix use-after-free of the add_lock mutex\n\nCommit 6098475d4cb4 (\"spi: Fix deadlock when adding SPI controllers on\nSPI buses\") introduced a per-controller mutex. But mutex_unlock() of\nsaid lock is called after the controller is already freed:\n\n spi_unregister_controller(ctlr)\n -\u003e put_device(\u0026ctlr-\u003edev)\n -\u003e spi_controller_release(dev)\n -\u003e mutex_unlock(\u0026ctrl-\u003eadd_lock)\n\nMove the put_device() after the mutex_unlock().",
"id": "GSD-2021-47195",
"modified": "2024-04-03T05:03:54.912656Z",
"schema_version": "1.4.0"
}
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"lastModified": "2024-04-19T19:16:08.537",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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- Confirmed: The vulnerability is confirmed from an analyst perspective.
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- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.