Re: [PATCH RESEND] KEYS: remove CONFIG_KEYS_COMPAT

From: Eric Biggers
Date: Tue May 08 2018 - 14:06:53 EST


On Tue, Feb 20, 2018 at 11:41:44AM -0800, Eric Biggers wrote:
> On Fri, Jan 05, 2018 at 11:19:47AM -0800, Eric Biggers wrote:
> > From: Eric Biggers <ebiggers@xxxxxxxxxx>
> >
> > 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 (Also remove an outdated comment from compat.c.)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@xxxxxxxxxx>
> > ---
> > 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 6462e6654ccf..e115d691d977 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 ef1581b337a3..b92ef62b99a1 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 e87c89c0177c..d7445946b701 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 9f8208dc0e55..6d54fa8baa64 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,
> > --
> > 2.16.0.rc0.223.g4a4ac83678-goog
> >
>
> Ping.

Ping. David, are you ever planning to apply this?

- Eric