Vulnerability CVE-2024-46702

Vulnerability CVE-2024-46702

Published: 2024-09-13

Description:

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

thunderbolt: Mark XDomain as unplugged when router is removed

I noticed that when we do discrete host router NVM upgrade and it gets
hot-removed from the PCIe side as a result of NVM firmware authentication,
if there is another host connected with enabled paths we hang in tearing
them down. This is due to fact that the Thunderbolt networking driver
also tries to cleanup the paths and ends up blocking in
tb_disconnect_xdomain_paths() waiting for the domain lock.

However, at this point we already cleaned the paths in tb_stop() so
there is really no need for tb_disconnect_xdomain_paths() to do that
anymore. Furthermore it already checks if the XDomain is unplugged and
bails out early so take advantage of that and mark the XDomain as
unplugged when we remove the parent router.

References:

https://git.kernel.org/stable/c/747bc154577de6e6af4bc99abfa859b8419bb4d8

https://git.kernel.org/stable/c/23ce6ba3b95488a2b9e9f6d43b340da0c15395dc

https://git.kernel.org/stable/c/80ac8d194831eca0c2f4fd862f7925532fda320c

https://git.kernel.org/stable/c/18b3ad2a3cc877dd4b16f48d84aa27b78d53bf1d

https://git.kernel.org/stable/c/7ca24cf9163c112bb6b580c6fb57c04a1f8b76e1

https://git.kernel.org/stable/c/e2006140ad2e01a02ed0aff49cc2ae3ceeb11f8d

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