On Mon, Oct 02, 2017 at 03:06:57PM +0200, René Scharfe wrote:
> >> Avoid the ASan error by casting the results of the lookup functions to
> >> struct object pointers. That works fine with NULL pointers as well. We
> >> already rely on the object member being first in all object types in
> >> other places in the code.
> >
> > Out of curiosity, did you have to do anything to coax this out of ASan
> > (e.g., a specific version)? I've been running it pretty regularly and
> > didn't see this one (I did switch from clang to gcc a month or two ago,
> > but this code is pretty old, I think).
>
> I did "make -j4 SANITIZE=undefined,address BLK_SHA1=1 test" with
> clang version 4.0.1-1 (tags/RELEASE_401/final), and t1450-fsck.sh failed.
Interesting. I can trigger it with the same setup, but not if:
1. I use gcc instead of clang.
2. If I only use one of UBSan and ASan. It's the combination that
triggers it.
-Peff
