Description
In the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy() In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability. Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.
Product status
c29345fa5f66bea0790cf2219f57b974d4fc177b (git) before cb27e43c0511e9e1ca8818d231656070b11c18cf
c29345fa5f66bea0790cf2219f57b974d4fc177b (git) before 38d8410021b55d226847b2ac8d189d89fe5a8866
c29345fa5f66bea0790cf2219f57b974d4fc177b (git) before ec1fcddb3117d9452210e838fd37389ee61e10e8
6.18
Any version before 6.18
6.18.30 (semver)
7.0.7 (semver)
7.1-rc3 (original_commit_for_fix)
References
git.kernel.org/...c/cb27e43c0511e9e1ca8818d231656070b11c18cf
git.kernel.org/...c/38d8410021b55d226847b2ac8d189d89fe5a8866
git.kernel.org/...c/ec1fcddb3117d9452210e838fd37389ee61e10e8