There is a module loading bug in head/mod.c When a module
is unregistered the f_name component is left alloing lis_findmod
to find it an lis_loadmod will attempt to lock a destroyed
semaphore. The problem can be recreated by manually loading a
streams kernel module (modprobe), unloading it (rmmod) and then
demand loading it (e.g. I_PUSH). The result is a kernel oops.
The patch below fixes the problem (but may break other things).
--brian
Index: head/mod.c
===================================================================
RCS file: /home/common/cvsroot/LiSnew/head/mod.c,v
retrieving revision 1.1.1.4
diff -U3 -r1.1.1.4 mod.c
--- head/mod.c 22 Nov 2003 23:01:43 -0000 1.1.1.4
+++ head/mod.c 15 Feb 2004 18:05:31 -0000
@@ -742,6 +742,7 @@
lis_up(&slot->f_sem) ;
lis_sem_destroy(&slot->f_sem) ;
slot->f_state &= ~LIS_MODSTATE_INITED ;
+ slot->f_name[0] = '\0';
printk("STREAMS module \"%s\" unregistered, id %d\n", name, id);
--
Brian F. G. Bidulock � The reasonable man adapts himself to the �
[EMAIL PROTECTED] � world; the unreasonable one persists in �
http://www.openss7.org/ � trying to adapt the world to himself. �
� Therefore all progress depends on the �
� unreasonable man. -- George Bernard Shaw �
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