tree cf025a1cf179005203ce8e6342b2002cb52a8b9b
parent 686c714cce06e8804e15daf7ce3d4f80c35c6a69
author Arjan van de Ven <arjan@linux.intel.com> 1223698572 -0700
committer Greg Kroah-Hartman <gregkh@suse.de> 1224710493 -0700

security: avoid calling a NULL function pointer in drivers/video/tvaudio.c

commit 5ba2f67afb02c5302b2898949ed6fc3b3d37dcf1 upstream

NULL function pointers are very bad security wise. This one got caught by
kerneloops.org quite a few times, so it's happening in the field....

Fix is simple, check the function pointer for NULL, like 6 other places
in the same function are already doing.

Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>