tree 826665046ac73a69255a1ee61755b30b2081c99c
parent 42240de04ce95e458b7b05cfa8357dae40e90b35
author Neels Hofmeyr <nhofmeyr@sysmocom.de> 1481550176 +0100
committer Neels Hofmeyr <nhofmeyr@sysmocom.de> 1481554071 +0100

show bug in logging: erratic redirection to DLGLOBAL for first invalid category

Add a check to logging_test.c to show a bug: when a logging category value that
is the first out-of-bounds value is passed to the logging system, the internal
map_subsys() fails to redirect to DLGLOBAL due to a flawed conditional. This
results in a too large array index and undefined behavior. A sanitize build
should catch this.

The bug is confirmed by the fact that logging_test.err stays the same
(hopefully) although a logging output should appear from this patch. The test
could as well segfault or anything else, it's a bit of a gamble.

This bug will be fixed along with the expectation in a subsequent patch.

Change-Id: I12bf38b6c1f85e2d7bf5a15f942dfe0beed41eba