Re: [PATCH RESEND] KEYS: remove CONFIG_KEYS_COMPAT

[Eric Biggers <ebiggers@kernel.org>]

On Thu, Feb 07, 2019 at 03:35:49PM -0800, Eric Biggers wrote:
> On Wed, Nov 14, 2018 at 04:52:38PM -0800, Eric Biggers wrote:
> > From: Eric Biggers <ebiggers@google.com>
> > 
> > KEYS_COMPAT now always takes the value of COMPAT && KEYS.  But the
> > security/keys/ directory is only compiled if KEYS is enabled, so in
> > practice KEYS_COMPAT is the same as COMPAT.  Therefore, remove the
> > unnecessary KEYS_COMPAT and just use COMPAT directly.
> > 
> > (Also remove an outdated comment from compat.c.)
> > 
> > Signed-off-by: Eric Biggers <ebiggers@google.com>
> > ---
> >  security/keys/Kconfig    | 4 ----
> >  security/keys/Makefile   | 2 +-
> >  security/keys/compat.c   | 5 -----
> >  security/keys/internal.h | 4 ++--
> >  4 files changed, 3 insertions(+), 12 deletions(-)
> > 
> > diff --git a/security/keys/Kconfig b/security/keys/Kconfig
> > index 6462e6654ccf4..e115d691d9776 100644
> > --- a/security/keys/Kconfig
> > +++ b/security/keys/Kconfig
> > @@ -20,10 +20,6 @@ config KEYS
> >  
> >  	  If you are unsure as to whether this is required, answer N.
> >  
> > -config KEYS_COMPAT
> > -	def_bool y
> > -	depends on COMPAT && KEYS
> > -
> >  config PERSISTENT_KEYRINGS
> >  	bool "Enable register of persistent per-UID keyrings"
> >  	depends on KEYS
> > diff --git a/security/keys/Makefile b/security/keys/Makefile
> > index 9cef54064f608..c694458d9a46c 100644
> > --- a/security/keys/Makefile
> > +++ b/security/keys/Makefile
> > @@ -17,7 +17,7 @@ obj-y := \
> >  	request_key_auth.o \
> >  	user_defined.o
> >  compat-obj-$(CONFIG_KEY_DH_OPERATIONS) += compat_dh.o
> > -obj-$(CONFIG_KEYS_COMPAT) += compat.o $(compat-obj-y)
> > +obj-$(CONFIG_COMPAT) += compat.o $(compat-obj-y)
> >  obj-$(CONFIG_PROC_FS) += proc.o
> >  obj-$(CONFIG_SYSCTL) += sysctl.o
> >  obj-$(CONFIG_PERSISTENT_KEYRINGS) += persistent.o
> > diff --git a/security/keys/compat.c b/security/keys/compat.c
> > index 9482df601dc33..f22527e88e3d5 100644
> > --- a/security/keys/compat.c
> > +++ b/security/keys/compat.c
> > @@ -50,11 +50,6 @@ static long compat_keyctl_instantiate_key_iov(
> >  
> >  /*
> >   * The key control system call, 32-bit compatibility version for 64-bit archs
> > - *
> > - * This should only be called if the 64-bit arch uses weird pointers in 32-bit
> > - * mode or doesn't guarantee that the top 32-bits of the argument registers on
> > - * taking a 32-bit syscall are zero.  If you can, you should call sys_keyctl()
> > - * directly.
> >   */
> >  COMPAT_SYSCALL_DEFINE5(keyctl, u32, option,
> >  		       u32, arg2, u32, arg3, u32, arg4, u32, arg5)
> > diff --git a/security/keys/internal.h b/security/keys/internal.h
> > index 74cb0ff42fedb..d1836e5d670cb 100644
> > --- a/security/keys/internal.h
> > +++ b/security/keys/internal.h
> > @@ -272,7 +272,7 @@ extern long keyctl_dh_compute(struct keyctl_dh_params __user *, char __user *,
> >  			      size_t, struct keyctl_kdf_params __user *);
> >  extern long __keyctl_dh_compute(struct keyctl_dh_params __user *, char __user *,
> >  				size_t, struct keyctl_kdf_params *);
> > -#ifdef CONFIG_KEYS_COMPAT
> > +#ifdef CONFIG_COMPAT
> >  extern long compat_keyctl_dh_compute(struct keyctl_dh_params __user *params,
> >  				char __user *buffer, size_t buflen,
> >  				struct compat_keyctl_kdf_params __user *kdf);
> > @@ -287,7 +287,7 @@ static inline long keyctl_dh_compute(struct keyctl_dh_params __user *params,
> >  	return -EOPNOTSUPP;
> >  }
> >  
> > -#ifdef CONFIG_KEYS_COMPAT
> > +#ifdef CONFIG_COMPAT
> >  static inline long compat_keyctl_dh_compute(
> >  				struct keyctl_dh_params __user *params,
> >  				char __user *buffer, size_t buflen,
> > -- 
> > 2.19.1.930.g4563a0d9d0-goog
> > 
> 
> Ping.  David, are you planning to apply this?
> 
> - Eric

Ping.