1. If we see should_failslab frames during report parsing,
that's a corrupted report with intermixed frames from
fault injection stack.
2. If we matched report title and this report should contains
a guilty stack frame, but we failed to extract any frame,
consider it as corrupted.
New tests added. Also one of the old tests is fixed.
Detect informational kernel reports that are not bugs in itself,
but contain stack traces. If we see them in the middle of another
report, we know stacks are intermixed and the report is potentially
corrupted.
1. Make extractStackFrame more picky about stray frames.
This fixes some TODO's in tests where we matched completley
unrelated frames printed by another task.
2. Extract KASAN guilty frame from report header
if the frame should not be skipped (e.g. not __lock_acquire).
This makes parsing more tolerant to corrupted reports.
If there are more than one report, detect where the second
report starts and extract description only from the first report.
There are too many cases where several reports gets intermixed
and as the result we extract bogus description.
1. Replace stacktraceRe with custom code which is more flexible.
stacktraceRe stumbled on any unrelated lines and
could not properly parse truncated stacks.
2. Match report regexp earlier.
If we match simler title regexp, but don't match
report regexp or fail to parse stack trace, the report is corrupted.
This eliminates lots of duplicate corrupted oops entries,
which were there only because we had complex regexp's in titles.
3. Ignore low-level frames during stack parsing.
E.g. we never want to report a GPF in lock_acquire or memcpy
(somewhat similar to what we do for guilty files).
4. Add a bunch of specialized formats for WARNINGs.
There is number of generic debugging facilities (like ODEBUG,
debug usercopy, kobject, refcount_t, etc), and the bug
is never in these facilities, it's in the caller instead.
5. Improve some other oops formats.
6. Add a bunch of additional tests.
This resolves most of TODOs in tests.
Fixes#515
Don't print object size (can change from kernel to kernel
and from config to config).
Fix function extraction regexp (must be non-eager).
Account for MSECS_MIN_AGE.
Ignore some known false positives.
