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authorErik Kaneda <erik.kaneda@intel.com>2020-11-30 22:20:47 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2020-12-01 20:13:30 +0300
commit32cf1a12cad43358e47dac8014379c2f33dfbed4 (patch)
tree041643054491108a5cd19404ab3c5117ed1d9456 /include/acpi
parent0766efdf9a9d24eaefe260c787f49af225018b16 (diff)
downloadlinux-32cf1a12cad43358e47dac8014379c2f33dfbed4.tar.xz
ACPICA: Interpreter: fix memory leak by using existing buffer
ACPICA commit 52d1da5dcbd79a722b70f02a1a83f04088f51ff6 There was a memory leak that ocurred when a _CID object is defined as a package containing string objects. When _CID is checked for any possible repairs, it calls a helper function to repair _HID (because _CID basically contains multiple _HID entries). The _HID repair function assumes that string objects are standalone objects that are not contained inside of any packages. The _HID repair function replaces the string object with a brand new object and attempts to delete the old object by decrementing the reference count of the old object. Strings inside of packages have a reference count of 2 so the _HID repair function leaves this object in a dangling state and causes a memory leak. Instead of allocating a brand new object and removing the old object, use the existing object when repairing the _HID object. Link: https://github.com/acpica/acpica/commit/52d1da5d Signed-off-by: Erik Kaneda <erik.kaneda@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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