[1.7] System reboot (udfs.sys), cygwin 1.7 (question for Eric Blake)

Christopher Faylor cgf-use-the-mailinglist-please@cygwin.com
Tue Dec 30 17:53:00 GMT 2008

On Tue, Dec 30, 2008 at 12:41:04PM -0500, Christopher Faylor wrote:
>On Tue, Dec 30, 2008 at 12:06:38PM -0500, Christopher Faylor wrote:
>>On Tue, Dec 30, 2008 at 11:25:43AM -0500, Gregory C. Sharp wrote:
>>>I'm testing out cygwin 1.7, and ran into a problem.  I run a small
>>>script which checksums my dvd+r backups, something like this:
>>>find -L /cygdrive/d -noleaf -type f -exec cksum {} \;
>>>I try it out on cygwin 1.7, and 3 out of 4 times I get a system panic
>>>and reboot.  Dumpchk/WinDBG reveal access violation in udfs.sys.  This
>>>has never happened when I run the script on cygwin 1.5.  Stacktrace as
>>>ChildEBP RetAddr Args to Child f683fd78 804eeb49 88768288 00000000
>>>00000000 udfs!0xbb7db225 f683fda8 8052e8c2 88768288 00000000 00000000
>>>ntkrnlmp!ExQueueWorkItem+0x167 f683fddc 80543966 804eea9a 00000000
>>>00000000 ntkrnlmp!PsSetCreateThreadNotifyRoutine+0xa8 00000000 00000000
>>>00000000 00000000 00000000 ntkrnlmp!KiDispatchInterrupt+0x516
>>>System details: Windows 2000 SP4 fully patched, Pentium IV CPU
>>>(hyperthreaded), UDFS.SYS 5.0.2195.7006 (Dec 2, 2004), Samsung DVD ROM
>>>SD-616T, DVD+R media, Japanese locale (CP932).
>>>Any ideas what is going on?
>>We need the information here:
>>Also, if you can get an strace of the failure that would probably be
>>helpful.  It may be too big to send to the list, though.  If so, please
>>let me know here and I'll arrange for a place for you to upload it.
>I got a system reboot (once) from this too.  How wonderful is that?
>It seemed to die following a symlink in my dev directory.  Investigating

Hmm.  After removing the /dev/fd directory that I had created years
ago, find now just SEGVs.  And, it seems to be dying in find itself
if the stack dump is any indication.

Eric, is there any way that you could confirm or deny this?  I would
rather not build a debugging version of find if I don't have to.


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