Hi,

This is probably an aged bug, and it only shows up for the attached
config.

[    9.709959] isdnloop-ISDN-driver Rev 1.11.6.7 
[    9.712191] isdnloop: (loop0) virtual card added
[    9.714364] Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: ffffffff81e5b55b
[    9.714364] 
[    9.719546] Pid: 1, comm: swapper Not tainted 3.5.0-rc6+ #16
[    9.722091] Call Trace:
[    9.723510]  [<ffffffff81a2a6a7>] panic+0xa0/0x19d
[    9.725771]  [<ffffffff81e5b55b>] ? isdnloop_init+0x9b/0x9d
[    9.728266]  [<ffffffff81e5b4c0>] ? isar_mod_init+0x1d/0x1d
[    9.730771]  [<ffffffff81049596>] __stack_chk_fail+0x16/0x20
[    9.733294]  [<ffffffff81e5b55b>] isdnloop_init+0x9b/0x9d
[    9.735803]  [<ffffffff81e23c34>] do_one_initcall+0x78/0x131
[    9.738336]  [<ffffffff81e23dde>] kernel_init+0xf1/0x175
[    9.740749]  [<ffffffff81e235f3>] ? do_early_param+0x8c/0x8c
[    9.743247]  [<ffffffff81a42754>] kernel_thread_helper+0x4/0x10
[    9.745885]  [<ffffffff81e23ced>] ? do_one_initcall+0x131/0x131
[    9.748499]  [<ffffffff81a42750>] ? gs_change+0x13/0x13
[    9.750856] Rebooting in 10 seconds..

Thanks,
Fengguang