From owner-freebsd-bugs  Wed May 19  5:40: 3 1999
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Date: Wed, 19 May 1999 05:39:06 -0700 (PDT)
From: lha@stacken.kth.se
To: freebsd-gnats-submit@freebsd.org
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Subject: kern/11779: kernel panic in module_release
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>Number:         11779
>Category:       kern
>Synopsis:       kernel panic in module_release
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed May 19 05:40:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:     Love
>Release:        current
>Organization:
Stacken
>Environment:
FreeBSD mulet.e.kth.se 4.0-CURRENT FreeBSD 4.0-CURRENT #2: Wed May 19 14:26:24 CEST 1999     root@mulet.e.kth.se:/usr/src/sys/compile/MULET  i386

>Description:
page fault in module_release when doing a kld_unload

The pagefault is in the last TAILQ_REMOVE in module_release (kern/kern_module.c:1.17)

stacktrace:
  module_release
  linker_file_unload
  kld_unload
  syscall

>How-To-Repeat:
load and unload a kld
>Fix:
The following patch seams to fix the bug, and this code was
remove in patch kern/kern_module.c: 1.16 to 1.17 by peter

--- kern_module.c.old   Wed May 19 14:08:25 1999
+++ kern_module.c       Wed May 19 14:16:08 1999
@@ -136,6 +136,7 @@
        container = linker_current_file;
     if (container)
        TAILQ_INSERT_TAIL(&container->modules, newmod, flink);
+    newmod->file = container;
 
     return 0;
 }


>Release-Note:
>Audit-Trail:
>Unformatted:


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