[OpenAFS-port-darwin] AFS related kernel panic

[Josh Plautz]

Hey all-

One of my users here can consistantly cause his mac to panic using
version 1.3.70.  I asked him to write up what he does and grab the panic
log for your perusal.  I was able to reproduce this on my system as well
so I don't think its anything specific with his environment.  Basically
run the perl script on a file in an afs mounted directory, and your
system will crash fairly quickly (but not immediately, it seems to take
until the next afs access or something- generally within about 30 seconds).

We are running OSX 10.3.5.

p.s. I notice that the org.openafs.filesystems.afs line in the crash log 
shows 1.2.10.  Is that the correct version string for that file?  I know 
for a fact he's running 1.3.70 from the website.  I saw the same version 
string on my version, and upgraded again to 1.3.70 from a fresh download 
and see the same string.  I just want to be sure there isn't something 
wrong with that installer.

Here's his note:

-----

   Here are the specifics.  If I execute the following command
to the Makefile.test file listed below, I can consistently
panic my MacX box.

       perl -pi -e 's/TARGET/CTARGET/go' Makefile.test


File: Makefile.test

$(TARGET)/$(PROGRAM):
         (cd $(TARGET) && $(CC) -o $(PROGRAM) $(PROGRAM).c)

$(MKTCLAPPINSTALLDIR)/bin/$(PROGRAM): $(TARGET)/$(PROGRAM)
         (cd $(TARGET) && $(INSTALL) -d $(MKTCLAPPINSTALLDIR)/bin)
         (cd $(TARGET) && $(INSTALL) $(INSTALLBINFLAGS) $(PROGRAM)
$(MKTCLAPPINSTALLDIR)/bin)

EOF


The kernel panic log shows the following entry.


*********

Thu Sep 23 15:49:01 2004


panic(cpu 0): vrele: ref cnt
Latest stack backtrace for cpu 0:
       Backtrace:
          0x000836E4 0x00083BC8 0x0001EDA4 0x000C1BC0 0x000C3BA8
0x00078C3C 0x000693E4 0x3579CC48
          0x35752E70 0x357367D4 0x357A1B98 0x357A3890 0x002452B4
0x00094200 0x00000000
       Kernel loadable modules in backtrace (with dependencies):
          org.openafs.filesystems.afs(1.2.10)@0x3572a000
Proceeding back via exception chain:
    Exception state (sv=0x351F1C80)
       PC=0x9001A4AC; MSR=0x0000D030; DAR=0x000234C8; DSISR=0x40000000;
LR=0x00004CD0; R1=0xBFFFC840; XCP=0x00000030 (0xC00 - System call)

Kernel version:
Darwin Kernel Version 7.5.0:
Thu Aug  5 19:26:16 PDT 2004; root:xnu/xnu-517.7.21.obj~3/RELEASE_PPC

----------

And here's the panic I got following his instructions:


Thu Sep 23 16:27:59 2004


panic(cpu 0): vrele: ref cnt
Latest stack backtrace for cpu 0:
       Backtrace:
          0x000836E4 0x00083BC8 0x0001EDA4 0x000C1BC0 0x000C3BA8 
0x00078C3C 0x000693E4 0x38194C48
          0x3814AE70 0x3812E7D4 0x38199B98 0x3819B890 0x002452B4 
0x00094200 0x00090009
       Kernel loadable modules in backtrace (with dependencies):
          org.openafs.filesystems.afs(1.2.10)@0x38122000
Proceeding back via exception chain:
    Exception state (sv=0x38093500)
       PC=0x9001A4AC; MSR=0x0000D030; DAR=0x000234C8; DSISR=0x40000000; 
LR=0x00004CD0; R1=0xBFFFC840; XCP=0x00000030 (0xC00 - System call)

Kernel version:
Darwin Kernel Version 7.5.0:
Thu Aug  5 19:26:16 PDT 2004; root:xnu/xnu-517.7.21.obj~3/RELEASE_PPC

Lemme know if you need any further info.

josh