[LinuxPPS] 24 Jan 16:01 - lockdep: fix kernel crash on module unload

[linuxpps: Arjan van de Ven <>]

lockdep: fix kernel crash on module unload  
  
Michael Wu noticed in his lkml post at  
  
http://marc.info/?l=linux-kernel&m=119396182726091&w=2  
  
that certain wireless drivers ended up having their name in module  
memory, which would then crash the kernel on module unload.  
  
The patch he proposed was a bit clumsy in that it increased the size of  
a lockdep entry significantly; the patch below tries another approach,  
it checks, on module teardown, if the name of a class is in module space  
and then zaps the class. This is very similar to what we already do  
with keys that are in module space.  
  
Signed-off-by: Arjan van de Ven   
Signed-off-by: Ingo Molnar   
Acked-by: Peter Zijlstra   
Signed-off-by: Linus Torvalds   
  
kernel/lockdep.c

URL: http://gitweb.enneenne.com/?p=linuxpps;a=commit;h=fabe874a48de45b137f99b4ed3641e0413f465ce