[Devel] Re: [PATCH] remove BUG() in possible but rare condition

[Jiri Kosina]

On Wed, 11 Apr 2012, Linus Torvalds wrote:

> > I am not familiar with the code much but a trivial call chain walk up to
> > write_dev_supers (in btrfs) shows that we do not check for the return value
> > from __getblk so we would nullptr and there might be more.
> > I guess these need some treat before the BUG might be removed, right?
> 
> Well, realistically, isn't BUG() as bad as a NULL pointer dereference?

Well, there still could be weirdos out there not setting 
sys.vm.mmap_min_addr to something sane. For those, NULL pointer 
dereference could have worse consequences than BUG (unlikely in this 
particular case, yes).

-- 
Jiri Kosina
SUSE Labs