diff mbox series

[GIT,PULL] Keys: fix C++ reserved word issue

Message ID alpine.LRH.2.21.1809250738020.27047@namei.org (mailing list archive)
State New, archived
Headers show
Series [GIT,PULL] Keys: fix C++ reserved word issue | expand

Pull-request

git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git fixes-v4.19-rc5

Commit Message

James Morris Sept. 24, 2018, 9:40 p.m. UTC
Please pull this revert and update, from David Howells:

"Here's a pair of fixes that need to go upstream asap, please:

 (1) Revert an incorrect fix to the keyrings UAPI for a C++ reserved word
     used as a struct member name.  This change being reverted breaks
     existing userspace code and is thus incorrect.

     Further, *neither* name is consistent with the one in the keyutils
     package public header.

 (2) Fix the problem by using a union to make the name from keyutils
     available in parallel and make the 'private' name unavailable in C++
     with cpp-conditionals."

---
The following changes since commit 02214bfc89c71bcc5167f653994cfa5c57f10ff1:

  Merge tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (2018-09-24 15:16:41 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security.git fixes-v4.19-rc5

for you to fetch changes up to cae081e4d49ac9be127c4e1b876bb685c2c04159:

  keys: Fix the use of the C++ keyword "private" in uapi/linux/keyctl.h (2018-09-24 13:51:12 -0700)

----------------------------------------------------------------
David Howells (1):
      keys: Fix the use of the C++ keyword "private" in uapi/linux/keyctl.h

Lubomir Rintel (1):
      Revert "uapi/linux/keyctl.h: don't use C++ reserved keyword as a struct member name"

 include/uapi/linux/keyctl.h | 7 ++++++-
 security/keys/dh.c          | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

Comments

Greg KH Sept. 25, 2018, 9:41 a.m. UTC | #1
On Tue, Sep 25, 2018 at 07:40:06AM +1000, James Morris wrote:
> Please pull this revert and update, from David Howells:
> 
> "Here's a pair of fixes that need to go upstream asap, please:
> 
>  (1) Revert an incorrect fix to the keyrings UAPI for a C++ reserved word
>      used as a struct member name.  This change being reverted breaks
>      existing userspace code and is thus incorrect.
> 
>      Further, *neither* name is consistent with the one in the keyutils
>      package public header.
> 
>  (2) Fix the problem by using a union to make the name from keyutils
>      available in parallel and make the 'private' name unavailable in C++
>      with cpp-conditionals."
> 
> ---
> The following changes since commit 02214bfc89c71bcc5167f653994cfa5c57f10ff1:
> 
>   Merge tag 'media/v4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (2018-09-24 15:16:41 +0200)

{sigh}

$ date --date="2018-09-25 07:40:06 +1000" +%s
1537825206
$ date --date="2018-09-24 15:16:41 +0200" +%s
1537795001
$ bc <<< "1537825206-1537795001"
30205
$ date -ud "@30205" +'%H hours %M minutes %S seconds'
08 hours 23 minutes 25 seconds

8.5 hours seems like a short amount of time for something to sit in a
tree before asking for it to be merged.  Wait, it's actually less than
that, I just took into account the longest possible time it could have
been in your tree.

I'll wait a few days on this one...

thanks,

greg k-h
David Howells Sept. 25, 2018, 10:17 a.m. UTC | #2
Greg KH <gregkh@linuxfoundation.org> wrote:

> I'll wait a few days on this one...

Can you at least apply the reversion patch?  UAPI is currently broken by the
change that needs reverting.

David
Greg KH Sept. 25, 2018, 11:30 a.m. UTC | #3
On Tue, Sep 25, 2018 at 11:17:00AM +0100, David Howells wrote:
> Greg KH <gregkh@linuxfoundation.org> wrote:
> 
> > I'll wait a few days on this one...
> 
> Can you at least apply the reversion patch?  UAPI is currently broken by the
> change that needs reverting.

Yes, as that's obviously correct.  I think you should wait for your
patch 2 here until 4.20-rc1, as this isn't a "fix" that is required at
this point in time.

I'll just go cherry-pick that one patch, thanks.

greg k-h
James Morris Sept. 25, 2018, 6:07 p.m. UTC | #4
On Tue, 25 Sep 2018, Greg KH wrote:

> On Tue, Sep 25, 2018 at 11:17:00AM +0100, David Howells wrote:
> > Greg KH <gregkh@linuxfoundation.org> wrote:
> > 
> > > I'll wait a few days on this one...
> > 
> > Can you at least apply the reversion patch?  UAPI is currently broken by the
> > change that needs reverting.
> 
> Yes, as that's obviously correct.  I think you should wait for your
> patch 2 here until 4.20-rc1, as this isn't a "fix" that is required at
> this point in time.

Ok, I'll queue this for the merge window.
diff mbox series

Patch

diff --git a/include/uapi/linux/keyctl.h b/include/uapi/linux/keyctl.h
index 910cc4334b21..0f3cb13db8e9 100644
--- a/include/uapi/linux/keyctl.h
+++ b/include/uapi/linux/keyctl.h
@@ -65,7 +65,12 @@ 
 
 /* keyctl structures */
 struct keyctl_dh_params {
-	__s32 dh_private;
+	union {
+#ifndef __cplusplus
+		__s32 private;
+#endif
+		__s32 priv;
+	};
 	__s32 prime;
 	__s32 base;
 };
diff --git a/security/keys/dh.c b/security/keys/dh.c
index 3b602a1e27fa..711e89d8c415 100644
--- a/security/keys/dh.c
+++ b/security/keys/dh.c
@@ -300,7 +300,7 @@  long __keyctl_dh_compute(struct keyctl_dh_params __user *params,
 	}
 	dh_inputs.g_size = dlen;
 
-	dlen = dh_data_from_key(pcopy.dh_private, &dh_inputs.key);
+	dlen = dh_data_from_key(pcopy.private, &dh_inputs.key);
 	if (dlen < 0) {
 		ret = dlen;
 		goto out2;