kern/90330: linux_compat /dev system freeze problem

[Andrea Gronchi]

>Number:         90330
>Category:       kern
>Synopsis:       linux_compat /dev system freeze problem
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec 13 11:00:10 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Andrea Gronchi
>Release:        6.0-RELEASE
>Organization:
Blackbit Studio
>Environment:
FreeBSD tron.blackbit.lan 6.0-RELEASE FreeBSD 6.0-RELEASE #0: Tue Nov 29 15:59:06 CET 2005     root at tron.blackbit.lan:/usr/src/sys/i386/compile/TRON  i386

>Description:
It seems that from a linux_compat process, listing the contents of "/dev" results in a system freeze.
>How-To-Repeat:
loaded modules:

root at tron# kldstat
Id Refs Address    Size     Name
 1   22 0xc0400000 3cd340   kernel
 2    1 0xc07ce000 7674     snd_emu10k1.ko
 3    2 0xc07d6000 1d9c8    sound.ko
 4    1 0xc07f4000 3be080   nvidia.ko
 5    1 0xc0bb3000 8e9c     aio.ko
 6   16 0xc0bbc000 5683c    acpi.ko
 7    1 0xc2c5a000 2000     rtc.ko
 8    1 0xc2c60000 8000     vmmon_up.ko
 9    1 0xc2c68000 2000     vmnet.ko
10    1 0xc2c6a000 4000     if_tap.ko
11    4 0xc2c8c000 a000     netgraph.ko
12    1 0xc2c9a000 3000     ng_ether.ko
13    1 0xc2c9d000 4000     ng_bridge.ko
14    1 0xc2ca2000 4000     ng_socket.ko

if I run /compat/linux/bin/bash -c "ls /dev"

my system immediately freezes.
>Fix:
Non that I am aware of.
>Release-Note:
>Audit-Trail:
>Unformatted: