[PATCH 01/10] LSM: SafeSetID: fix pr_warn() to include newline

[Micah Morton]

These 10 patches got buried, but Jann, Kees and myself are in
agreement on how they look.

Could they get merged? Patches 8/10 and 9/10 have a v2 that should get
merged instead of the originals. I can respond on all the patches that
should get merged if that is helpful?

On Wed, Apr 10, 2019 at 10:09 AM Kees Cook <keescook at chromium.org> wrote:
>
> On Wed, Apr 10, 2019 at 9:54 AM Micah Morton <mortonm at chromium.org> wrote:
> >
> > From: Jann Horn <jannh at google.com>
> >
> > Fix the pr_warn() calls in the SafeSetID LSM to have newlines at the end.
> > Without this, denial messages will be buffered as incomplete lines in
> > log_output(), and will then only show up once something else prints into
> > dmesg.
> >
> > Signed-off-by: Jann Horn <jannh at google.com>
> > Signed-off-by: Micah Morton <mortonm at chromium.org>
>
> Reviewed-by: Kees Cook <keescook at chromium.org>
>
> -Kees
>
> > ---
> >  security/safesetid/lsm.c | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/security/safesetid/lsm.c b/security/safesetid/lsm.c
> > index cecd38e2ac80..2daecab3a4c0 100644
> > --- a/security/safesetid/lsm.c
> > +++ b/security/safesetid/lsm.c
> > @@ -91,7 +91,7 @@ static int safesetid_security_capable(const struct cred *cred,
> >                          * to functionality other than calling set*uid() (e.g.
> >                          * allowing user to set up userns uid mappings).
> >                          */
> > -                       pr_warn("Operation requires CAP_SETUID, which is not available to UID %u for operations besides approved set*uid transitions",
> > +                       pr_warn("Operation requires CAP_SETUID, which is not available to UID %u for operations besides approved set*uid transitions\n",
> >                                 __kuid_val(cred->uid));
> >                         return -1;
> >                 }
> > @@ -103,7 +103,7 @@ static int check_uid_transition(kuid_t parent, kuid_t child)
> >  {
> >         if (check_setuid_policy_hashtable_key_value(parent, child))
> >                 return 0;
> > -       pr_warn("UID transition (%d -> %d) blocked",
> > +       pr_warn("UID transition (%d -> %d) blocked\n",
> >                 __kuid_val(parent),
> >                 __kuid_val(child));
> >         /*
> > --
> > 2.21.0.392.gf8f6787159e-goog
> >
>
>
> --
> Kees Cook