Messages in this thread | | | Date | Mon, 18 Dec 2023 07:53:13 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH] class: fix use-after-free in class_register() |
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On Mon, Dec 18, 2023 at 07:52:18AM +0100, Greg Kroah-Hartman wrote: > On Mon, Dec 18, 2023 at 10:44:03AM +0800, Chunyan Zhang wrote: > > From: Jing Xia <jing.xia@unisoc.com> > > > > The lock_class_key is still registered and can be found in > > lock_keys_hash hlist after subsys_private is freed in error > > handler path.A task who iterate over the lock_keys_hash > > later may cause use-after-free.So fix that up and unregister > > the lock_class_key before kfree(cp). > > What task iterates over all hashes? > > And can you put ' ' after your '.'? > > And how was this found?
And more importantly, how was this tested?
thanks,
greg k-h
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