Quoting Casey Schaufler ([email protected]):
>
> --- Jiri Slaby <[email protected]> wrote:
>
> > On 11/28/2007 12:41 PM, Andrew Morton wrote:
> > >
> >
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24-rc3/2.6.24-rc3-mm2/
> > [...]
> > > +capabilities-introduce-per-process-capability-bounding-set.patch
> >
> > A regression against -mm1. This patch breaks bind (9.5.0-18.a7.fc8):
> > capset(0x19980330, 0,
> >
> {CAP_DAC_READ_SEARCH|CAP_SETGID|CAP_SETUID|CAP_NET_BIND_SERVICE|CAP_SYS_CHROOT|CAP_SYS_RESOURCE,
> >
> CAP_DAC_READ_SEARCH|CAP_SETGID|CAP_SETUID|CAP_NET_BIND_SERVICE|CAP_SYS_CHROOT|CAP_SYS_RESOURCE,
> > 0}) = -1 EPERM (Operation not permitted)
> >
> > $ grep SEC .config
> > CONFIG_SECCOMP=y
> > # CONFIG_NETWORK_SECMARK is not set
> > CONFIG_RPCSEC_GSS_KRB5=m
> > # CONFIG_RPCSEC_GSS_SPKM3 is not set
> > # CONFIG_SECURITY is not set
> > # CONFIG_SECURITY_FILE_CAPABILITIES is not set
> >
> > probably this hunk?:
> > @@ -133,6 +119,12 @@ int cap_capset_check (struct task_struct
> > /* incapable of using this inheritable set */
> > return -EPERM;
> > }
> > + if (!!cap_issubset(*inheritable,
> > + cap_combine(target->cap_inheritable,
> > + current->cap_bset))) {
> > + /* no new pI capabilities outside bounding set */
> > + return -EPERM;
> > + }
That shouldn't be it, since you can't lower cap_bset since
CONFIG_SECURITY_FILE_CAPABILITIES=n.
> >
> > /* verify restrictions on target's new Permitted set */
> > if (!cap_issubset (*permitted,
>
> I can see that the value for CAP_LAST_CAP is not right in
> include/linux/capability.h, but I don't know if that is the
Alas, that doesn't seem likely to be it either, since cap_valid() and
therefore CAP_LAST_CAP are only used when tweaking the cap_bset.
> only problem. I should have a patch (unless someone beats me to it)
> later today.
Oh, sorry, after I sent the patch to fix that inline, I never sent it
as a separate patch.
I'll resend it to lkml right now.
thanks,
-serge
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