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thermal: core: Free tzp copy along with the thermal zone

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BugLink: https://bugs.launchpad.net/bugs/2097301

commit 827a07525c099f54d3b15110408824541ec66b3c upstream.

The object pointed to by tz->tzp may still be accessed after being
freed in thermal_zone_device_unregister(), so move the freeing of it
to the point after the removal completion has been completed at which
it cannot be accessed any more.

Fixes: 3d439b1a2a ("thermal/core: Alloc-copy-free the thermal zone parameters structure")
Cc: 6.8+ <stable@vger.kernel.org> # 6.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://patch.msgid.link/4623516.LvFx2qVVIh@rjwysocki.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CVE-2024-50027
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
This commit is contained in:
Rafael J. Wysocki
2024-10-03 14:27:28 +02:00
committed by Mehmet Basaran
parent 44303170c3
commit ed7794857c
1 changed files with 1 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/thermal/thermal_core.c
+1 -3
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@@ -1526,14 +1526,12 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
ida_destroy(&tz->ida);
device_del(&tz->device);
kfree(tz->tzp);
put_device(&tz->device);
thermal_notify_tz_delete(tz);
wait_for_completion(&tz->removal);
kfree(tz->tzp);
kfree(tz);
}
EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);