Panic in Snow Leopard

[Hlaing Min]

Hi,

I'm testing the LoopbackFS ObjC example file system with OSXFUSE 2.4.0 on Snow Leopard (10.6.8). I got a few kernel panics when i opened a XCode project and tried to compile it in the loopback file system.

Please see the file attached if you can reproduce the same problem. Please let me know anything that i can try.

Best Regards,
Hlaing Min

[Benjamin Fleischer]

Hi,

thank you very much for your bug report! This bug has existed since the first version of OSXUFSE and is related to the locking code that makes the kernel extension thread-safe. The solution should be relatively simple: unlock biglock before calling ubc_setsize. I'm afraid there is nothing you can try to fox this besides updating to OSXFUSE 2.4.1, once it is available.

For everyone interested, here is the symbolicated stack trace:

panic

fusefs_recursive_lock_lock

fuse_biglock_vnop_pagein

VNOP_PAGEIN

vnode_pagein

vnode_pager_cluster_read

vnode_pager_data_request

vm_fault_page

vm_object_update

memory_object_lock_request

ubc_setsize

fuse_vnop_setattr

fuse_biglock_vnop_setattr

VNOP_SETATTR

vnode_setattr

vnode_setsize

open1

open_nocancel

unix_syscall64

lo64_unix_scall

Regards,

Benjamin

<Kernel_2012-05-30-151722_Hlaing-Mins-iMac.panic>

[Hlaing Min]

Hi Benjamin,

I appreciate for your prompt reply. I'm looking forward to the OSXFUSE 2.4.1.

Thank so much.

[Benjamin Fleischer]

Please try the following build an let me know it fixes the issue:

https://dl.dropbox.com/u/70779888/OSXFUSE-2.4.1.pkg

Regards,

Benjamin

[Hlaing Min]

Hi Benjamin,

Thank you very much for the fix. I tested it by doing the same operations and the bug is no longer there! The issue has been fixed with the new build.
Thank you.

Best Regards,
Hlaing Min