UN-NAK[D]: [X/B/D][SRU] Fix for CVE-2019-18885

Kleber Souza kleber.souza at canonical.com
Tue Dec 17 08:35:16 UTC 2019

On 12.12.19 11:49, Kleber Souza wrote:
> On 2019-12-10 01:48, Connor Kuehl wrote:
>> https://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-18885.html
>> From the link above:
>>     "fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a
>>     btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image
>>     because fs_devices->devices is mishandled within find_device, aka
>>     CID-09ba3bc9dd15."
>> The additional commit, "btrfs: refactor btrfs_find_device() take fs_devices as
>> argument" was taken to ease the placement of the commit that is specified by the
>> CVE as a fix. This enabled a clean cherry-pick into Disco.
>> Cherry picks straight into Disco.
>> Minor context adjustments for Bionic.
>> Xenial required some hand-holding as certain hunks wouldn't apply to a function
>> that perhaps has not been added yet, certain function arguments have not been
>> refactored but are accessible by accessing members of the enclosing structure
>> that *is* passed.
> Disco will EOL in January and we are not planning to release another
> kernel SRU for it. So I'm NAK'ing the patches for D.

Although Disco support will end in January, our plan is to continue producing
5.0 kernel updates for a yet to be defined period.

So please disregard my NAK to this patch.


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