[SRU][Focal][PATCH 0/1] CVE-2020-36691

[Yuxuan Luo]

[Impact]
nlattr.c does not bound the recursion depth, therefore, in theory, attackers
can issue a policy referring to its upper level, causing a infinite loop.

[Backport]
There is a conflict in cherry picking which requires backporting a
refactoring commit; it could be ignored by keeping the data structure before
refactoring.

[Test]
Compile and boot tested.

[Potential Regression]
Expecting low regression potential limited to lib/nlattr.c.

Yuxuan Luo (1):
  netlink: limit recursion depth in policy validation

 lib/nlattr.c | 46 ++++++++++++++++++++++++++++++++++------------
 1 file changed, 34 insertions(+), 12 deletions(-)

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2.34.1