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Change History

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

io_uring: Fix release of pinned pages when __io_uaddr_map fails

Looking at the error path of __io_uaddr_map, if we fail after pinning
the pages for any reasons, ret will be set to -EINVAL and the error
handler won't properly release the pinned pages.

I didn't manage to trigger it without forcing a failure, but it can
happen in real life when memory is heavily fragmented.

kernel.org https://git.kernel.org/stable/c/0b6f39c175ba5f0ef72bdb3b9d2a06ad78621d62 [No types assigned]

kernel.org https://git.kernel.org/stable/c/4d376d7ad62b6a8e8dfff56b559d9d275e5b9b3a [No types assigned]

kernel.org https://git.kernel.org/stable/c/67d1189d1095d471ed7fa426c7e384a7140a5dd7 [No types assigned]

kernel.org https://git.kernel.org/stable/c/712e2c8415f55a4a4ddaa98a430b87f624109f69 [No types assigned]