[4.19] Security fixes (blktrace, btrfs)

Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx> · Sat, 07 Nov 2020 00:13:24 +0000

Here are backports of some fixes to the 4.19 stable branch.

I tested the blktrace fix with the script referenced in the commit
message.

I tested the btrfs changes with the reproducers for CVE-2019-19039,
CVE-2019-19377, and CVE-2019-19816, and checked for regressions with
xfstests.

Ben.

-- 
Ben Hutchings, Software Developer                         Codethink Ltd
https://www.codethink.co.uk/                 Dale House, 35 Dale Street
                                     Manchester, M1 2HF, United Kingdom
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