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Change History

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

ipvs: do not keep dest_dst if dev is going down

There is race between the netdev notifier ip_vs_dst_event()
and the code that caches dst with dev that is going down.
As the FIB can be notified for the closed device after our
handler finishes, it is possible valid route to be returned
and cached resuling in a leaked dev reference until the dest
is not removed.

To prevent new dest_dst to be attached to dest just after the
handler dropped the old one, add a netif_running() check
to make sure the notifier handler is not currently running
for device that is closing.

https://git.kernel.org/stable/c/024eb0bd19f507e6e7f0c7a7e5506d66b5dc1d3e

https://git.kernel.org/stable/c/64af43033503458c46023e56d6ae7bb0f824b55f

https://git.kernel.org/stable/c/8fde939b0206afc1d5846217a01a16b9bc8c7896

https://git.kernel.org/stable/c/bae53b3baf2ff2f45f9205c438818fc055601a54