svn commit: r329984 - in head: cddl/contrib/opensolaris/lib/libzpool/common sys/cddl/compat/opensolaris/sys

[Shawn Webb]

On Wed, Mar 14, 2018 at 05:06:09PM -0600, Alan Somers wrote:
> On Wed, Mar 14, 2018 at 4:56 PM, Shawn Webb <shawn.webb at hardenedbsd.org>
> wrote:
> 
> > On Wed, Mar 14, 2018 at 04:51:27PM -0600, Alan Somers wrote:
> > > On Wed, Mar 14, 2018 at 4:50 PM, Shawn Webb <shawn.webb at hardenedbsd.org>
> > > wrote:
> > >
> > > > On Sun, Feb 25, 2018 at 02:29:43PM +0000, Alan Somers wrote:
> > > > > Author: asomers
> > > > > Date: Sun Feb 25 14:29:43 2018
> > > > > New Revision: 329984
> > > > > URL: https://svnweb.freebsd.org/changeset/base/329984
> > > > >
> > > > > Log:
> > > > >   Don't declare __assfail as static
> > > > >
> > > > >   It gets called by dmu_buf_init_user, which is inline but not
> > static.
> > > > So it
> > > > >   needs global linkage itself.
> > > > >
> > > > >   Reported by:        GCC-6
> > > > >   MFC after:  17 days
> > > > >   X-MFC-With: 329722
> > > > >
> > > >
> > > > Hey Alan,
> > > >
> > > > This commit breaks compiling world with ASAN.
> > > >
> > > > Some applications, like zfs, will fail with this error:
> > > >
> > > > /lib/libuutil.so.2: Undefined symbol "__assfail"
> > > >
> > > > Thanks,
> > > >
> > >
> > > How does one build world with ASAN ?
> >
> > HardenedBSD has a feature branch in its playground repo for ASAN-ified
> > world.
> >
> > We introduced two new MK_* toggles: MK_ASAN and MK_ASAN_RECOVER.
> > MK_ASAN is self-explanitory. MK_ASAN_RECOVER tells the sanitizer
> > framework to let the application continue running instead of abort
> > execution.
> >
> > Here's where the magic gets set:
> >
> > https://github.com/HardenedBSD/hardenedBSD-playground/blob/hardened/
> > current/asan/share/mk/bsd.prog.mk#L125-L134
> >
> > Thanks,
> >
> 
> I don't use HardenedBSD.  Can you provide an invocation that will
> demonstrate the breakage on FreeBSD head?  I tried a few things, and they
> all either worked, or failed with errors other than the one you showed.

No worries. I've just reverted the commit in that feature branch. If I
have time, I'll see about porting the ASAN work to vanilla FreeBSD.
But my time is extremely limited these days.

Thanks,

-- 
Shawn Webb
Cofounder and Security Engineer
HardenedBSD

Tor-ified Signal:    +1 443-546-8752
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