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

USB: serial: digi_acceleport: fix write buffer corruption

The digi_write_inb_command() is supposed to wait for the write urb to
become available or return an error, but instead it updates the transfer
buffer and tries to resubmit the urb on timeout.

To make things worse, for commands like break control where no timeout
is used, the driver would corrupt the urb immediately due to a broken
jiffies comparison (on 32-bit machines this takes five minutes of uptime
to trigger due to INITIAL_JIFFIES).

Fix this by adding the missing return on timeout and waiting
indefinitely when no timeout has been specified as intended.

This issue was (sort of) flagged by Sashiko when reviewing an unrelated
change to the driver.

https://git.kernel.org/stable/c/1243f120790042c2ac92e84e797dacc75fff4366

https://git.kernel.org/stable/c/24ca1fea8f2753bf33e1d458ec1ae5d9b7796a65

https://git.kernel.org/stable/c/2f296974acc279f05f284441bfe3064074958d11

https://git.kernel.org/stable/c/5d9dc88bdf8897788b0eed57113e9eca7fd42ea9

https://git.kernel.org/stable/c/699dfb6917503b3cda4d5da6941cf79c3c1b4c8b

https://git.kernel.org/stable/c/a274b3794fe1852c3d9fe6d900b94053c0b03410

https://git.kernel.org/stable/c/a3a13fdc53103b07335918e2cdeb465038a71725

https://git.kernel.org/stable/c/e60e4873e9178da9f4f2674e4c2ff085d5a84f79

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