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Message-ID: <20120614231325.GA9695@www.outflux.net>
Date: Thu, 14 Jun 2012 16:13:25 -0700
From: Kees Cook <keescook@...omium.org>
To: linux-kernel@...r.kernel.org
Cc: Al Viro <viro@...iv.linux.org.uk>, Eric Paris <eparis@...hat.com>
Subject: [PATCH] audit: replace defines with C stubs
This replaces the #defines used when CONFIG_AUDIT or CONFIG_AUDIT_SYSCALLS
are disabled so we get type checking during those builds.
Suggested-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Kees Cook <keescook@...omium.org>
---
include/linux/audit.h | 173 ++++++++++++++++++++++++++++++++++++-------------
1 files changed, 127 insertions(+), 46 deletions(-)
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 22f292a..fa55743 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -622,37 +622,92 @@ static inline void audit_mmap_fd(int fd, int flags)
extern int audit_n_rules;
extern int audit_signals;
#else /* CONFIG_AUDITSYSCALL */
-#define audit_alloc(t) ({ 0; })
-#define audit_free(t) do { ; } while (0)
-#define audit_syscall_entry(ta,a,b,c,d,e) do { ; } while (0)
-#define audit_syscall_exit(r) do { ; } while (0)
-#define audit_dummy_context() 1
-#define audit_getname(n) do { ; } while (0)
-#define audit_putname(n) do { ; } while (0)
-#define __audit_inode(n,d) do { ; } while (0)
-#define __audit_inode_child(i,p) do { ; } while (0)
-#define audit_inode(n,d) do { (void)(d); } while (0)
-#define audit_inode_child(i,p) do { ; } while (0)
-#define audit_core_dumps(i) do { ; } while (0)
-#define audit_seccomp(i,s,c) do { ; } while (0)
-#define auditsc_get_stamp(c,t,s) (0)
+static inline int audit_alloc(struct task_struct *task)
+{
+ return 0;
+}
+static inline void audit_free(struct task_struct *task)
+{ }
+static inline void audit_syscall_entry(int arch, int major, unsigned long a0,
+ unsigned long a1, unsigned long a2,
+ unsigned long a3)
+{ }
+static inline void audit_syscall_exit(void *pt_regs)
+{ }
+static inline int audit_dummy_context(void)
+{
+ return 1;
+}
+static inline void audit_getname(const char *name)
+{ }
+static inline void audit_putname(const char *name)
+{ }
+static inline void __audit_inode(const char *name, const struct dentry *dentry)
+{ }
+static inline void __audit_inode_child(const struct dentry *dentry,
+ const struct inode *parent)
+{ }
+static inline void audit_inode(const char *name, const struct dentry *dentry)
+{ }
+static inline void audit_inode_child(const struct dentry *dentry,
+ const struct inode *parent)
+{ }
+static inline void audit_core_dumps(long signr)
+{ }
+static inline void __audit_seccomp(unsigned long syscall, long signr, int code)
+{ }
+static inline void audit_seccomp(unsigned long syscall, long signr, int code)
+{ }
+static inline int auditsc_get_stamp(struct audit_context *ctx,
+ struct timespec *t, unsigned int *serial)
+{
+ return 0;
+}
#define audit_get_loginuid(t) (-1)
#define audit_get_sessionid(t) (-1)
-#define audit_log_task_context(b) do { ; } while (0)
-#define audit_ipc_obj(i) ((void)0)
-#define audit_ipc_set_perm(q,u,g,m) ((void)0)
-#define audit_bprm(p) ({ 0; })
-#define audit_socketcall(n,a) ((void)0)
-#define audit_fd_pair(n,a) ((void)0)
-#define audit_sockaddr(len, addr) ({ 0; })
-#define audit_mq_open(o,m,a) ((void)0)
-#define audit_mq_sendrecv(d,l,p,t) ((void)0)
-#define audit_mq_notify(d,n) ((void)0)
-#define audit_mq_getsetattr(d,s) ((void)0)
-#define audit_log_bprm_fcaps(b, ncr, ocr) ({ 0; })
-#define audit_log_capset(pid, ncr, ocr) ((void)0)
-#define audit_mmap_fd(fd, flags) ((void)0)
-#define audit_ptrace(t) ((void)0)
+static inline void audit_log_task_context(struct audit_buffer *ab)
+{ }
+static inline void audit_ipc_obj(struct kern_ipc_perm *ipcp)
+{ }
+static inline void audit_ipc_set_perm(unsigned long qbytes, uid_t uid,
+ gid_t gid, umode_t mode)
+{ }
+static inline int audit_bprm(struct linux_binprm *bprm)
+{
+ return 0;
+}
+static inline void audit_socketcall(int nargs, unsigned long *args)
+{ }
+static inline void audit_fd_pair(int fd1, int fd2)
+{ }
+static inline int audit_sockaddr(int len, void *addr)
+{
+ return 0;
+}
+static inline void audit_mq_open(int oflag, umode_t mode, struct mq_attr *attr)
+{ }
+static inline void audit_mq_sendrecv(mqd_t mqdes, size_t msg_len,
+ unsigned int msg_prio,
+ const struct timespec *abs_timeout)
+{ }
+static inline void audit_mq_notify(mqd_t mqdes,
+ const struct sigevent *notification)
+{ }
+static inline void audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
+{ }
+static inline int audit_log_bprm_fcaps(struct linux_binprm *bprm,
+ const struct cred *new,
+ const struct cred *old)
+{
+ return 0;
+}
+static inline void audit_log_capset(pid_t pid, const struct cred *new,
+ const struct cred *old)
+{ }
+static inline void audit_mmap_fd(int fd, int flags)
+{ }
+static inline void audit_ptrace(struct task_struct *t)
+{ }
#define audit_n_rules 0
#define audit_signals 0
#endif /* CONFIG_AUDITSYSCALL */
@@ -676,7 +731,6 @@ extern void audit_log_n_hex(struct audit_buffer *ab,
extern void audit_log_n_string(struct audit_buffer *ab,
const char *buf,
size_t n);
-#define audit_log_string(a,b) audit_log_n_string(a, b, strlen(b));
extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
const char *string,
size_t n);
@@ -691,7 +745,8 @@ extern void audit_log_lost(const char *message);
#ifdef CONFIG_SECURITY
extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
#else
-#define audit_log_secctx(b,s) do { ; } while (0)
+static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
+{ }
#endif
extern int audit_update_lsm_rules(void);
@@ -703,21 +758,47 @@ extern int audit_receive_filter(int type, int pid, int uid, int seq,
void *data, size_t datasz, uid_t loginuid,
u32 sessionid, u32 sid);
extern int audit_enabled;
-#else
-#define audit_log(c,g,t,f,...) do { ; } while (0)
-#define audit_log_start(c,g,t) ({ NULL; })
-#define audit_log_vformat(b,f,a) do { ; } while (0)
-#define audit_log_format(b,f,...) do { ; } while (0)
-#define audit_log_end(b) do { ; } while (0)
-#define audit_log_n_hex(a,b,l) do { ; } while (0)
-#define audit_log_n_string(a,c,l) do { ; } while (0)
-#define audit_log_string(a,c) do { ; } while (0)
-#define audit_log_n_untrustedstring(a,n,s) do { ; } while (0)
-#define audit_log_untrustedstring(a,s) do { ; } while (0)
-#define audit_log_d_path(b, p, d) do { ; } while (0)
-#define audit_log_key(b, k) do { ; } while (0)
-#define audit_log_secctx(b,s) do { ; } while (0)
+#else /* CONFIG_AUDIT */
+static inline __printf(4, 5)
+void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
+ const char *fmt, ...)
+{ }
+static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
+ gfp_t gfp_mask, int type)
+{
+ return NULL;
+}
+static inline __printf(2, 3)
+void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
+{ }
+static inline void audit_log_end(struct audit_buffer *ab)
+{ }
+static inline void audit_log_n_hex(struct audit_buffer *ab,
+ const unsigned char *buf, size_t len)
+{ }
+static inline void audit_log_n_string(struct audit_buffer *ab,
+ const char *buf, size_t n)
+{ }
+static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
+ const char *string, size_t n)
+{ }
+static inline void audit_log_untrustedstring(struct audit_buffer *ab,
+ const char *string)
+{ }
+static inline void audit_log_d_path(struct audit_buffer *ab,
+ const char *prefix,
+ const struct path *path)
+{ }
+static inline void audit_log_key(struct audit_buffer *ab, char *key)
+{ }
+static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
+{ }
#define audit_enabled 0
-#endif
+#endif /* CONFIG_AUDIT */
+static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
+{
+ audit_log_n_string(ab, buf, strlen(buf));
+}
+
#endif
#endif
--
1.7.0.4
--
Kees Cook
Chrome OS Security
--
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