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Change History

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

fbdev: Fix invalid page access after closing deferred I/O devices

When a fbdev with deferred I/O is once opened and closed, the dirty
pages still remain queued in the pageref list, and eventually later
those may be processed in the delayed work.  This may lead to a
corruption of pages, hitting an Oops.

This patch makes sure to cancel the delayed work and clean up the
pageref list at closing the device for addressing the bug. 

kernel.org https://git.kernel.org/stable/c/3efc61d95259956db25347e2a9562c3e54546e20 [No types assigned]

kernel.org https://git.kernel.org/stable/c/87b9802ca824fcee7915e717e9a60471af62e8e9 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f1d91f0e9d5a240a809698d7d9c5a538e7dcc149 [No types assigned]