On Tue, 2011-12-20 at 10:21 +0000, Bart Van Assche wrote: > On Mon, Dec 19, 2011 at 12:07 AM, David Dillow <[email protected]> wrote: > > They use a BUG_ON instead of WARN_ON, which > > seems more appropriate, since we just overran a buffer... > > Sorry, but I disagree. The guideline for Linux kernel code is to use > BUG_ON() only if a crash can't be avoided. With SLUB red zoning > enabled it is still possible to unload kernel modules after a (mild) > buffer overrun. And if you have a look at mm/slub.c, you will see that > slab_err() is invoked in case padding has been overwritten. That last > function does something similar to WARN_ON().
You aren't guaranteed to have SLUB as your allocator, much less having the red-zoning turned on, so you have no guarantee it is safe to continue. -- Dave Dillow National Center for Computational Science Oak Ridge National Laboratory (865) 241-6602 office -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
