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[Bug 566288] Kernel oops triggered by switching tabs in flash based page
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Tue, 20 Apr 2010 11:54:41 +0000
  • Message-id: <20100420115441.ED268245520@xxxxxxxxxxxxxxxxxxxxxx>

--- Comment #21 from Robert Schweikert <rschweikert@xxxxxxxxxx> 2010-04-20
11:54:37 UTC ---
(In reply to comment #19)
(In reply to comment #17)
Here is a trace from an oops that occurred with the debug kernel. The trace
occurred while heavy I/O was taking place.

Apr 17 01:18:35 triumph kernel: [629085.891576] page:ffffea0001e53000
flags:0020000000000000 count:-775699968 mapcount:-43821 mapping:(null)
Apr 17 01:18:35 triumph kernel: [629085.891594] Pid: 1122, comm: tar
Tainted: P
The struct page looks corrupted. #1
The kernel is not a -debug one as you claim to be (maybe you've just
installed the debug package for the -default kernel and not the -debug kernel
flavor?). Moreover you have some proprietary modules loaded so this dump isn't
particularly interesting...

OK, missed that. what's interesting is that the dump occurred while I was gone
and I was certain I had booted the debug kernel before I left. oh well, missed
opportunity. Sorry about the incorrect claim.

Apr 17 01:20:01 triumph kernel: [629171.986844] BUG: Bad page state in
tar pfn:91492
Apr 17 01:20:01 triumph kernel: [629171.986865] page:ffffea0001fc7ff0
flags:0020000000000000 count:0 mapcount:0 mapping:000054d2d1c3c200 index:49f
Again looks like corrupted struct page. Funnily enough, if you look how
previous struct page was corrupted in hex, you'll see that pattern
0x54D3D1C3C200 was written to a part of the struct - upto one bit the same
pattern that corrupted the mapping value in this struct page. So definitely
something is scribbling over your memory => not too interesting unless you can
reproduce it without tainted kernel.

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