Messages in this thread | | | Date | Wed, 25 May 2011 10:28:17 -0500 | From | Serge Hallyn <> | Subject | Re: [Security] Fwd: Oops (bad memory deref) in slab_alloc() due to filp_cachep holding incorrect values |
| |
Quoting Robert Święcki (robert@swiecki.net): > >> Given that it doesn't seem to appear in 2.6.39-rc4, and judging by the > >> names of functions involved, this change looks suspiciously related to > >> this oops (even if it just made the keyctl problem visible) > >> http://git.itanic.dy.fi/?p=linux-stable;a=commitdiff;h=47a150edc2ae734c0f4bf50aa19499e23b9a46f8 > >> > >> >> #include <sys/stat.h> > >> >> #include <sys/wait.h> > >> >> #include <unistd.h> > >> >> #include <sys/syscall.h> > >> >> #include <linux/keyctl.h> > >> >> #include <linux/sched.h> > >> >> > >> >> int TH1(void *dummy) { > >> >> syscall(__NR_keyctl, KEYCTL_SESSION_TO_PARENT); > > > > Thanks! > > > > Fooi, it looks like all users of cred_alloc_blank() may need to be > > audited wrt commit 47a150edc2ae734c0f4bf50aa19499e23b9a46f8. > > > > Does this fix the bug you're seeing? > > Yup, the kernel survives both the testcase and a short syscall fuzzing > session. Thanks.
Thanks, Robert.
David, assuming this gets your ack, do you mind pushing this one forward?
thanks, -serge -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |