[haiku-bugs] Re: [Haiku] #10259: CDDA-related KDL: ASCII string corrupts kernel structures
- From: "bonefish" <trac@xxxxxxxxxxxx>
- Date: Thu, 28 Nov 2013 16:41:15 -0000
#10259: CDDA-related KDL: ASCII string corrupts kernel structures
---------------------------------+----------------------------
Reporter: ttcoder | Owner: axeld
Type: bug | Status: assigned
Priority: normal | Milestone: R1
Component: File Systems/cdda | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
---------------------------------+----------------------------
Comment (by bonefish):
I would approach the problem by starting with an objdump of
`_user_stop_notifying()` to find out exactly what kind of object gets
corrupted. Then the node monitoring code could be scrutinized wrt. to the
management of those objects.
If that doesn't turn up any suspects, assuming that this issue is
reproducible, certain debugging features of our slab allocator
(`SLAB_ALLOCATION_TRACKING` in kernel_debug_config.h and
`SLAB_OBJECT_CACHE_TRACING[_STACK_TRACE]` in tracing_config.h) can be
enabled. If the tracing buffer is large enough for that case
(`MAX_TRACE_SIZE` -- I'd recommend at least several hundred MiB), it will
be possible to track down the code allocating and freeing the respective
chunk of memory.
--
Ticket URL: <http://dev.haiku-os.org/ticket/10259#comment:8>
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