ACK: [SRU][F][PATCH 0/1] CVE-2024-42244

[Mehmet Basaran]

Acked-by: Mehmet Basaran <mehmet.basaran at canonical.com>

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Bethany Jamison <bethany.jamison at canonical.com> writes:

> [Impact]
>
> USB: serial: mos7840: fix crash on resume
>
> Since commit c49cfa9 ("USB: serial: use generic method if no
> alternative is provided in usb serial layer"), USB serial core calls the
> generic resume implementation when the driver has not provided one.
>
> This can trigger a crash on resume with mos7840 since support for
> multiple read URBs was added back in 2011. Specifically, both port read
> URBs are now submitted on resume for open ports, but the context pointer
> of the second URB is left set to the core rather than mos7840 port
> structure.
>
> Fix this by implementing dedicated suspend and resume functions for
> mos7840.
>
> Tested with Delock 87414 USB 2.0 to 4x serial adapter.
>
> [Fix]
>
> Noble:	pending (6.8.0-46.46)
> Jammy:	released
> Focal:	Backported from linux-5.10.y - I adjusted the code to ignore a 
> 	context conflict, Focal has '.read_int_callback' line which isn't 
> 	upstream
> Bionic:	fix sent to esm ML
> Xenial:	fix needed
> Trusty:	won't fix
>
> [Test Case]
>
> Compile tested.
>
> [Where problems could occur]
>
> This fix affects those who use the Moschip 7840/7820 USB Serial Driver,
> an issue with this fix would be visible to the user via a system crash.
>
> Dmitry Smirnov (1):
>   USB: serial: mos7840: fix crash on resume
>
>  drivers/usb/serial/mos7840.c | 45 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 45 insertions(+)
>
> -- 
> 2.34.1
>
>
> -- 
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
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