CVE-2023-53856
Description
In the Linux kernel, the following vulnerability has been resolved: of: overlay: Call of_changeset_init() early When of_overlay_fdt_apply() fails, the changeset may be partially applied, and the caller is still expected to call of_overlay_remove() to clean up this partial state. However, of_overlay_apply() calls of_resolve_phandles() before init_overlay_changeset(). Hence if the overlay fails to apply due to an unresolved symbol, the overlay_changeset.cset.entries list is still uninitialized, and cleanup will crash with a NULL-pointer dereference in overlay_removal_is_ok(). Fix this by moving the call to of_changeset_init() from init_overlay_changeset() to of_overlay_fdt_apply(), where all other early initialization is done.
How to fix
- Linux Linux01bb96ad38089f5cc6de7746dac13437d35eb1dc, 3fb210cd521c9efcb211e9f5ce40fc907200bf13, be86241bf5d1efd16d8a7231c13b33459c5d755d, c403c81b577a67fe9ec6a2e89d143256487be50f, a9515ff4fb142b690a0d2b58782b15903b990dba or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | f948d6d8b792bb90041edc12eac35faf83030994 ≤ v < 01bb96ad38089f5cc6de7746dac13437d35eb1dc, f948d6d8b792bb90041edc12eac35faf83030994 ≤ v < 3fb210cd521c9efcb211e9f5ce40fc907200bf13, f948d6d8b792bb90041edc12eac35faf83030994 ≤ v < be86241bf5d1efd16d8a7231c13b33459c5d755d, f948d6d8b792bb90041edc12eac35faf83030994 ≤ v < c403c81b577a67fe9ec6a2e89d143256487be50f, f948d6d8b792bb90041edc12eac35faf83030994 ≤ v < a9515ff4fb142b690a0d2b58782b15903b990dba, 4.15 | 01bb96ad38089f5cc6de7746dac13437d35eb1dc, 3fb210cd521c9efcb211e9f5ce40fc907200bf13, be86241bf5d1efd16d8a7231c13b33459c5d755d, c403c81b577a67fe9ec6a2e89d143256487be50f, a9515ff4fb142b690a0d2b58782b15903b990dba |
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