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[Bug runtime/14107] Bad user unwinding from kernel fatal signal handler for some x86_64 kernels
- From: "mjw at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Mon, 21 May 2012 11:01:19 +0000
- Subject: [Bug runtime/14107] Bad user unwinding from kernel fatal signal handler for some x86_64 kernels
- Auto-submitted: auto-generated
- References: <bug-14107-6586@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=14107
Mark Wielaard <mjw at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #6 from Mark Wielaard <mjw at redhat dot com> 2012-05-21 11:01:19 UTC ---
Not really "fixed", but with the proper kernel patch, see comment #5, this
should just work. Added a testcase to check the system is behaving properly.
commit 07c9d78ebb28b888f01aed9c206e724f0e72db25
Author: Mark Wielaard <mjw@redhat.com>
Date: Mon May 21 12:57:41 2012 +0200
Add testcase for PR14107 Bad user unwinding from kernel fatal signal
handler
This is really a kernel bug, see bug report, when the CFI for the assembly
code is missing we cannot properly recover the register state for the user
process and might give a bad/missing user backtrace.
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