| Message ID | 20240906-macos-build-support-v2-6-06beff418848@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Enable build system on macOS hosts | expand |
On Fri, Sep 6, 2024 at 7:01 AM Daniel Gomez via B4 Relay <devnull+da.gomez.samsung.com@kernel.org> wrote: > > From: Masahiro Yamada <masahiroy@kernel.org> > > Commit bfc5e3a6af39 ("selinux: use the kernel headers when building > scripts/selinux") is not the right thing to do. > > It is clear from the warning in include/uapi/linux/types.h: > > #ifndef __EXPORTED_HEADERS__ > #warning "Attempt to use kernel headers from user space, see https://kernelnewbies.org/KernelHeaders" > #endif /* __EXPORTED_HEADERS__ */ > > If you are inclined to define __EXPORTED_HEADERS__, you are likely doing > wrong. > > Adding the comment: > > /* NOTE: we really do want to use the kernel headers here */ > > does not justify the hack in any way. > > Currently, <linux/*.h> headers are included for the following purposes: > > - <linux/capability.h> is included to check CAP_LAST_CAP > - <linux/socket.h> in included to check PF_MAX > > We can skip these checks when building host programs, as they will > be eventually tested when building the kernel space. > > I got rid of <linux/stddef.h> from initial_sid_to_string.h because > it is likely that NULL is already defined. If you insist on making > it self-contained, you can add the following: > > #ifdef __KERNEL__ > #include <linux/stddef.h> > #else > #include <stddef.h> > #endif > > scripts/selinux/mdp/mdp.c still includes <linux/kconfig.h>, which is > also discouraged and should be fixed by a follow-up refactoring. > > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> > --- > scripts/selinux/genheaders/Makefile | 4 +--- > scripts/selinux/genheaders/genheaders.c | 3 --- > scripts/selinux/mdp/Makefile | 2 +- > scripts/selinux/mdp/mdp.c | 4 ---- > security/selinux/include/classmap.h | 19 ++++++++++++------- > security/selinux/include/initial_sid_to_string.h | 2 -- > 6 files changed, 14 insertions(+), 20 deletions(-) Similar to patch 7/8, please read my comments on your previous posting of this patch, it doesn't appear that you've made any of the changes I asked for in your previous posting. https://lore.kernel.org/selinux/317c7d20ab8a72975571cb554589522b@paul-moore.com
On Fri, Sep 6, 2024 at 4:56 PM Paul Moore <paul@paul-moore.com> wrote: > > On Fri, Sep 6, 2024 at 7:01 AM Daniel Gomez via B4 Relay > <devnull+da.gomez.samsung.com@kernel.org> wrote: > > > > From: Masahiro Yamada <masahiroy@kernel.org> > > > > Commit bfc5e3a6af39 ("selinux: use the kernel headers when building > > scripts/selinux") is not the right thing to do. > > > > It is clear from the warning in include/uapi/linux/types.h: > > > > #ifndef __EXPORTED_HEADERS__ > > #warning "Attempt to use kernel headers from user space, see https://kernelnewbies.org/KernelHeaders" > > #endif /* __EXPORTED_HEADERS__ */ > > > > If you are inclined to define __EXPORTED_HEADERS__, you are likely doing > > wrong. > > > > Adding the comment: > > > > /* NOTE: we really do want to use the kernel headers here */ > > > > does not justify the hack in any way. > > > > Currently, <linux/*.h> headers are included for the following purposes: > > > > - <linux/capability.h> is included to check CAP_LAST_CAP > > - <linux/socket.h> in included to check PF_MAX > > > > We can skip these checks when building host programs, as they will > > be eventually tested when building the kernel space. > > > > I got rid of <linux/stddef.h> from initial_sid_to_string.h because > > it is likely that NULL is already defined. If you insist on making > > it self-contained, you can add the following: > > > > #ifdef __KERNEL__ > > #include <linux/stddef.h> > > #else > > #include <stddef.h> > > #endif > > > > scripts/selinux/mdp/mdp.c still includes <linux/kconfig.h>, which is > > also discouraged and should be fixed by a follow-up refactoring. > > > > Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> > > --- > > scripts/selinux/genheaders/Makefile | 4 +--- > > scripts/selinux/genheaders/genheaders.c | 3 --- > > scripts/selinux/mdp/Makefile | 2 +- > > scripts/selinux/mdp/mdp.c | 4 ---- > > security/selinux/include/classmap.h | 19 ++++++++++++------- > > security/selinux/include/initial_sid_to_string.h | 2 -- > > 6 files changed, 14 insertions(+), 20 deletions(-) > > Similar to patch 7/8, please read my comments on your previous posting > of this patch, it doesn't appear that you've made any of the changes I > asked for in your previous posting. Sorry for the noise, Paul. I’ll review this one as well. > > https://lore.kernel.org/selinux/317c7d20ab8a72975571cb554589522b@paul-moore.com > > -- > paul-moore.com
diff --git a/scripts/selinux/genheaders/Makefile b/scripts/selinux/genheaders/Makefile index 1faf7f07e8db..866f60e78882 100644 --- a/scripts/selinux/genheaders/Makefile +++ b/scripts/selinux/genheaders/Makefile @@ -1,5 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 hostprogs-always-y += genheaders -HOST_EXTRACFLAGS += \ - -I$(srctree)/include/uapi -I$(srctree)/include \ - -I$(srctree)/security/selinux/include +HOST_EXTRACFLAGS += -I$(srctree)/security/selinux/include diff --git a/scripts/selinux/genheaders/genheaders.c b/scripts/selinux/genheaders/genheaders.c index 15520806889e..3834d7eb0af6 100644 --- a/scripts/selinux/genheaders/genheaders.c +++ b/scripts/selinux/genheaders/genheaders.c @@ -1,8 +1,5 @@ // SPDX-License-Identifier: GPL-2.0 -/* NOTE: we really do want to use the kernel headers here */ -#define __EXPORTED_HEADERS__ - #include <stdio.h> #include <stdlib.h> #include <unistd.h> diff --git a/scripts/selinux/mdp/Makefile b/scripts/selinux/mdp/Makefile index d61058ddd15c..673782e3212f 100644 --- a/scripts/selinux/mdp/Makefile +++ b/scripts/selinux/mdp/Makefile @@ -1,7 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 hostprogs-always-y += mdp HOST_EXTRACFLAGS += \ - -I$(srctree)/include/uapi -I$(srctree)/include \ + -I$(srctree)/include \ -I$(srctree)/security/selinux/include -I$(objtree)/include clean-files := policy.* file_contexts diff --git a/scripts/selinux/mdp/mdp.c b/scripts/selinux/mdp/mdp.c index 1415604c3d24..52365921c043 100644 --- a/scripts/selinux/mdp/mdp.c +++ b/scripts/selinux/mdp/mdp.c @@ -11,10 +11,6 @@ * Authors: Serge E. Hallyn <serue@us.ibm.com> */ - -/* NOTE: we really do want to use the kernel headers here */ -#define __EXPORTED_HEADERS__ - #include <stdio.h> #include <stdlib.h> #include <unistd.h> diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h index 7229c9bf6c27..518209e1beb0 100644 --- a/security/selinux/include/classmap.h +++ b/security/selinux/include/classmap.h @@ -1,8 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#include <linux/capability.h> -#include <linux/socket.h> - #define COMMON_FILE_SOCK_PERMS \ "ioctl", "read", "write", "create", "getattr", "setattr", "lock", \ "relabelfrom", "relabelto", "append", "map" @@ -36,10 +33,6 @@ "mac_override", "mac_admin", "syslog", "wake_alarm", "block_suspend", \ "audit_read", "perfmon", "bpf", "checkpoint_restore" -#if CAP_LAST_CAP > CAP_CHECKPOINT_RESTORE -#error New capability defined, please update COMMON_CAP2_PERMS. -#endif - /* * Note: The name for any socket class should be suffixed by "socket", * and doesn't contain more than one substr of "socket". @@ -181,6 +174,18 @@ const struct security_class_mapping secclass_map[] = { { NULL } }; +#ifdef __KERNEL__ /* avoid this check when building host programs */ + +#include <linux/capability.h> + +#if CAP_LAST_CAP > CAP_CHECKPOINT_RESTORE +#error New capability defined, please update COMMON_CAP2_PERMS. +#endif + +#include <linux/socket.h> + #if PF_MAX > 46 #error New address family defined, please update secclass_map. #endif + +#endif /* __KERNEL__ */ diff --git a/security/selinux/include/initial_sid_to_string.h b/security/selinux/include/initial_sid_to_string.h index 99b353b2abb4..f683a78b21fd 100644 --- a/security/selinux/include/initial_sid_to_string.h +++ b/security/selinux/include/initial_sid_to_string.h @@ -1,7 +1,5 @@ /* SPDX-License-Identifier: GPL-2.0 */ -#include <linux/stddef.h> - static const char *const initial_sid_to_string[] = { NULL, /* zero placeholder, not used */ "kernel", /* kernel / SECINITSID_KERNEL */