Mailinglist Archive: opensuse-bugs (10135 mails)

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http://bugzilla.novell.com/show_bug.cgi?id=533522

User jbeulich@xxxxxxxxxx added comment
http://bugzilla.novell.com/show_bug.cgi?id=533522#c14





--- Comment #14 from Jan Beulich <jbeulich@xxxxxxxxxx>  2009-11-13 01:46:37 MST 
---
The oops in #12 shows that something wrote a breakpoint insn at the beginning
of sys_read() - I don't think we enable kprobes, kgdb, or kdb to actively do
any such by default, and hence I would conclude it must have been some external
entity.

I wonder however whether the most recently loaded module (preloadtrace) does
anything like that (it's name might indicate such). This appears to come from a
KMP that I can't locate the source of, but it living in
/lib/modules/2.6.31.5-0.1-desktop/systemtap/ certainly suggests it might be the
one causing the issue.

If there is any sort of [improper] external changing of the code, then stack
corruption (subsequently leading to register corruption) is certainly possible
anywhere. And yes, the stack is offset by exactly one quadword in #11.

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