diff mbox series

[v2] libselinux: restorecon: avoid printing NULL pointer

Message ID 20220607170035.40090-1-cgzones@googlemail.com (mailing list archive)
State Accepted
Commit 956bda08f618
Headers show
Series [v2] libselinux: restorecon: avoid printing NULL pointer | expand

Commit Message

Christian Göttsche June 7, 2022, 5 p.m. UTC
The variable `curcon` is NULL in case the file has no current security
context.  Most C standard libraries handle it fine, avoid it nonetheless
for standard conformance.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
---
v2:
   print "<no context>" instead of "(null)"
---
 libselinux/src/selinux_restorecon.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Nicolas Iooss June 28, 2022, 9:05 p.m. UTC | #1
On Tue, Jun 7, 2022 at 7:00 PM Christian Göttsche
<cgzones@googlemail.com> wrote:
>
> The variable `curcon` is NULL in case the file has no current security
> context.  Most C standard libraries handle it fine, avoid it nonetheless
> for standard conformance.
>
> Signed-off-by: Christian Göttsche <cgzones@googlemail.com>

Hello,
What is the status of this patch? As it looks good to me, I can merge
it if nobody has any more comments.

Acked-by: Nicolas Iooss <nicolas.iooss@m4x.org>

Thanks,
Nicolas

> ---
> v2:
>    print "<no context>" instead of "(null)"
> ---
>  libselinux/src/selinux_restorecon.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/libselinux/src/selinux_restorecon.c b/libselinux/src/selinux_restorecon.c
> index 9f5b326c..3c441119 100644
> --- a/libselinux/src/selinux_restorecon.c
> +++ b/libselinux/src/selinux_restorecon.c
> @@ -744,7 +744,9 @@ static int restorecon_sb(const char *pathname, const struct stat *sb,
>                         selinux_log(SELINUX_INFO,
>                                     "%s %s from %s to %s\n",
>                                     updated ? "Relabeled" : "Would relabel",
> -                                   pathname, curcon, newcon);
> +                                   pathname,
> +                                   curcon ? curcon : "<no context>",
> +                                   newcon);
>
>                 if (flags->syslog_changes && !flags->nochange) {
>                         if (curcon)
> --
> 2.36.1
>
James Carter June 29, 2022, 7:09 p.m. UTC | #2
On Tue, Jun 28, 2022 at 5:06 PM Nicolas Iooss <nicolas.iooss@m4x.org> wrote:
>
> On Tue, Jun 7, 2022 at 7:00 PM Christian Göttsche
> <cgzones@googlemail.com> wrote:
> >
> > The variable `curcon` is NULL in case the file has no current security
> > context.  Most C standard libraries handle it fine, avoid it nonetheless
> > for standard conformance.
> >
> > Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
>
> Hello,
> What is the status of this patch? As it looks good to me, I can merge
> it if nobody has any more comments.
>

This patch is fine. Patch 1 fixes a commit that has been reverted, so
it is not needed.
Thanks,
Jim


> Acked-by: Nicolas Iooss <nicolas.iooss@m4x.org>
>
> Thanks,
> Nicolas
>
> > ---
> > v2:
> >    print "<no context>" instead of "(null)"
> > ---
> >  libselinux/src/selinux_restorecon.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/libselinux/src/selinux_restorecon.c b/libselinux/src/selinux_restorecon.c
> > index 9f5b326c..3c441119 100644
> > --- a/libselinux/src/selinux_restorecon.c
> > +++ b/libselinux/src/selinux_restorecon.c
> > @@ -744,7 +744,9 @@ static int restorecon_sb(const char *pathname, const struct stat *sb,
> >                         selinux_log(SELINUX_INFO,
> >                                     "%s %s from %s to %s\n",
> >                                     updated ? "Relabeled" : "Would relabel",
> > -                                   pathname, curcon, newcon);
> > +                                   pathname,
> > +                                   curcon ? curcon : "<no context>",
> > +                                   newcon);
> >
> >                 if (flags->syslog_changes && !flags->nochange) {
> >                         if (curcon)
> > --
> > 2.36.1
> >
>
Nicolas Iooss June 30, 2022, 7:35 p.m. UTC | #3
On Wed, Jun 29, 2022 at 9:09 PM James Carter <jwcart2@gmail.com> wrote:
>
> On Tue, Jun 28, 2022 at 5:06 PM Nicolas Iooss <nicolas.iooss@m4x.org> wrote:
> >
> > On Tue, Jun 7, 2022 at 7:00 PM Christian Göttsche
> > <cgzones@googlemail.com> wrote:
> > >
> > > The variable `curcon` is NULL in case the file has no current security
> > > context.  Most C standard libraries handle it fine, avoid it nonetheless
> > > for standard conformance.
> > >
> > > Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
> >
> > Hello,
> > What is the status of this patch? As it looks good to me, I can merge
> > it if nobody has any more comments.
> >
>
> This patch is fine. Patch 1 fixes a commit that has been reverted, so
> it is not needed.
> Thanks,
> Jim

This patch is now applied.

Thanks,
Nicolas

> > Acked-by: Nicolas Iooss <nicolas.iooss@m4x.org>
> >
> > Thanks,
> > Nicolas
> >
> > > ---
> > > v2:
> > >    print "<no context>" instead of "(null)"
> > > ---
> > >  libselinux/src/selinux_restorecon.c | 4 +++-
> > >  1 file changed, 3 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/libselinux/src/selinux_restorecon.c b/libselinux/src/selinux_restorecon.c
> > > index 9f5b326c..3c441119 100644
> > > --- a/libselinux/src/selinux_restorecon.c
> > > +++ b/libselinux/src/selinux_restorecon.c
> > > @@ -744,7 +744,9 @@ static int restorecon_sb(const char *pathname, const struct stat *sb,
> > >                         selinux_log(SELINUX_INFO,
> > >                                     "%s %s from %s to %s\n",
> > >                                     updated ? "Relabeled" : "Would relabel",
> > > -                                   pathname, curcon, newcon);
> > > +                                   pathname,
> > > +                                   curcon ? curcon : "<no context>",
> > > +                                   newcon);
> > >
> > >                 if (flags->syslog_changes && !flags->nochange) {
> > >                         if (curcon)
> > > --
> > > 2.36.1
> > >
> >
diff mbox series

Patch

diff --git a/libselinux/src/selinux_restorecon.c b/libselinux/src/selinux_restorecon.c
index 9f5b326c..3c441119 100644
--- a/libselinux/src/selinux_restorecon.c
+++ b/libselinux/src/selinux_restorecon.c
@@ -744,7 +744,9 @@  static int restorecon_sb(const char *pathname, const struct stat *sb,
 			selinux_log(SELINUX_INFO,
 				    "%s %s from %s to %s\n",
 				    updated ? "Relabeled" : "Would relabel",
-				    pathname, curcon, newcon);
+				    pathname,
+				    curcon ? curcon : "<no context>",
+				    newcon);
 
 		if (flags->syslog_changes && !flags->nochange) {
 			if (curcon)