tree 8a4d3be8401fa25a31be75f91b6418d7c75b3a90
parent a4842afc83334f97653e6cca6220b19f53696509
author Neels Hofmeyr <nhofmeyr@sysmocom.de> 1481546943 +0100
committer Neels Hofmeyr <nhofmeyr@sysmocom.de> 1481558214 +0100

fix logging: log_set_category_filter() for internal DL* logging cats

In log_set_category_filter(), passing a negative index lead to memory
corruption. Particularly dangerous since the internal logging categories have
negative values.

Fix: apply map_subsys() to interpret negative values as internal logging
categories.

As a side effect, out-of-bounds logging categories will be mapped to DLGLOBAL
instead of being dropped.

Fix the expectations in logging_test to match the fixed bug.

While at it also guard against a NULL logging target.

Change-Id: Ib0725b22bc39498c6b3970a61eb3339cf56d19f1