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Change History

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

xen/evtchn: avoid WARN() when unbinding an event channel

When unbinding a user event channel, the related handler might be
called a last time in case the kernel was built with
CONFIG_DEBUG_SHIRQ. This might cause a WARN() in the handler.

Avoid that by adding an "unbinding" flag to struct user_event which
will short circuit the handler.

kernel.org https://git.kernel.org/stable/c/35485dad6e28f9b17884764d4692b1655cb848d0 [No types assigned]

kernel.org https://git.kernel.org/stable/c/51c23bd691c0f1fb95b29731c356c6fd69925d17 [No types assigned]

kernel.org https://git.kernel.org/stable/c/99e425032c6ec13584d3cd33846e0c7307501b47 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9e2d4b58c1da48a32905802aaeadba7084b46895 [No types assigned]