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Change History

In the Linux kernel, the following vulnerability has been resolved:

rust_binder: fix oneway spam detection

The spam detection logic in TreeRange was executed before the current
request was inserted into the tree. So the new request was not being
factored in the spam calculation. Fix this by moving the logic after
the new range has been inserted.

Also, the detection logic for ArrayRange was missing altogether which
meant large spamming transactions could get away without being detected.
Fix this by implementing an equivalent low_oneway_space() in ArrayRange.

Note that I looked into centralizing this logic in RangeAllocator but
iterating through 'state' and 'size' got a bit too complicated (for me)
and I abandoned this effort.

https://git.kernel.org/stable/c/4fc87c240b8f30e22b7ebaae29d57105589e1c0b

https://git.kernel.org/stable/c/8d34c993a9a156e657e43cb95186980745cc3597

https://git.kernel.org/stable/c/edf685946c4acbe57cb96f8d5f3c07e9a2e973c8