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Commit 96368701 authored by Paul Moore's avatar Paul Moore Committed by Paul Moore
Browse files

audit: force seccomp event logging to honor the audit_enabled flag 



Previously we were emitting seccomp audit records regardless of the
audit_enabled setting, a deparature from the rest of audit.  This
patch makes seccomp auditing consistent with the rest of the audit
record generation code in that when audit_enabled=0 nothing is logged
by the audit subsystem.

The bulk of this patch is moving the CONFIG_AUDIT block ahead of the
CONFIG_AUDITSYSCALL block in include/linux/audit.h; the only real
code change was in the audit_seccomp() definition.

Signed-off-by: default avatarTony Jones <tonyj@suse.de>
Signed-off-by: default avatarPaul Moore <pmoore@redhat.com>
parent d865e573

include/linux/audit.h

+104 −100
Original line number Diff line number Diff line
@@ -113,6 +113,107 @@ struct filename; 


extern void audit_log_session_info(struct audit_buffer *ab);



#ifdef CONFIG_AUDIT

/* These are defined in audit.c */

				/* Public API */

extern __printf(4, 5)

void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,

	       const char *fmt, ...);



extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);

extern __printf(2, 3)

void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);

extern void		    audit_log_end(struct audit_buffer *ab);

extern bool		    audit_string_contains_control(const char *string,

							  size_t len);

extern void		    audit_log_n_hex(struct audit_buffer *ab,

					  const unsigned char *buf,

					  size_t len);

extern void		    audit_log_n_string(struct audit_buffer *ab,

					       const char *buf,

					       size_t n);

extern void		    audit_log_n_untrustedstring(struct audit_buffer *ab,

							const char *string,

							size_t n);

extern void		    audit_log_untrustedstring(struct audit_buffer *ab,

						      const char *string);

extern void		    audit_log_d_path(struct audit_buffer *ab,

					     const char *prefix,

					     const struct path *path);

extern void		    audit_log_key(struct audit_buffer *ab,

					  char *key);

extern void		    audit_log_link_denied(const char *operation,

						  struct path *link);

extern void		    audit_log_lost(const char *message);

#ifdef CONFIG_SECURITY

extern void 		    audit_log_secctx(struct audit_buffer *ab, u32 secid);

#else

static inline void	    audit_log_secctx(struct audit_buffer *ab, u32 secid)

{ }

#endif



extern int audit_log_task_context(struct audit_buffer *ab);

extern void audit_log_task_info(struct audit_buffer *ab,

				struct task_struct *tsk);



extern int		    audit_update_lsm_rules(void);



				/* Private API (for audit.c only) */

extern int audit_filter_user(int type);

extern int audit_filter_type(int type);

extern int audit_rule_change(int type, __u32 portid, int seq,

				void *data, size_t datasz);

extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);



extern u32 audit_enabled;

#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_link_denied(const char *string,

					 const struct path *link)

{ }

static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)

{ }

static inline int audit_log_task_context(struct audit_buffer *ab)

{

	return 0;

}

static inline void audit_log_task_info(struct audit_buffer *ab,

				       struct task_struct *tsk)

{ }

#define audit_enabled 0

#endif /* CONFIG_AUDIT */



#ifdef CONFIG_AUDIT_COMPAT_GENERIC

#define audit_is_compat(arch)  (!((arch) & __AUDIT_ARCH_64BIT))

#else
@@ -212,6 +313,9 @@ void audit_core_dumps(long signr); 


static inline void audit_seccomp(unsigned long syscall, long signr, int code)

{

	if (!audit_enabled)

		return;



	/* Force a record to be reported if a signal was delivered. */

	if (signr || unlikely(!audit_dummy_context()))

		__audit_seccomp(syscall, signr, code);
@@ -446,106 +550,6 @@ static inline bool audit_loginuid_set(struct task_struct *tsk) 
	return uid_valid(audit_get_loginuid(tsk));

}



#ifdef CONFIG_AUDIT

/* These are defined in audit.c */

				/* Public API */

extern __printf(4, 5)

void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,

	       const char *fmt, ...);



extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);

extern __printf(2, 3)

void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);

extern void		    audit_log_end(struct audit_buffer *ab);

extern bool		    audit_string_contains_control(const char *string,

							  size_t len);

extern void		    audit_log_n_hex(struct audit_buffer *ab,

					  const unsigned char *buf,

					  size_t len);

extern void		    audit_log_n_string(struct audit_buffer *ab,

					       const char *buf,

					       size_t n);

extern void		    audit_log_n_untrustedstring(struct audit_buffer *ab,

							const char *string,

							size_t n);

extern void		    audit_log_untrustedstring(struct audit_buffer *ab,

						      const char *string);

extern void		    audit_log_d_path(struct audit_buffer *ab,

					     const char *prefix,

					     const struct path *path);

extern void		    audit_log_key(struct audit_buffer *ab,

					  char *key);

extern void		    audit_log_link_denied(const char *operation,

						  struct path *link);

extern void		    audit_log_lost(const char *message);

#ifdef CONFIG_SECURITY

extern void 		    audit_log_secctx(struct audit_buffer *ab, u32 secid);

#else

static inline void	    audit_log_secctx(struct audit_buffer *ab, u32 secid)

{ }

#endif



extern int audit_log_task_context(struct audit_buffer *ab);

extern void audit_log_task_info(struct audit_buffer *ab,

				struct task_struct *tsk);



extern int		    audit_update_lsm_rules(void);



				/* Private API (for audit.c only) */

extern int audit_filter_user(int type);

extern int audit_filter_type(int type);

extern int audit_rule_change(int type, __u32 portid, int seq,

				void *data, size_t datasz);

extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);



extern u32 audit_enabled;

#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_link_denied(const char *string,

					 const struct path *link)

{ }

static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)

{ }

static inline int audit_log_task_context(struct audit_buffer *ab)

{

	return 0;

}

static inline void audit_log_task_info(struct audit_buffer *ab,

				       struct task_struct *tsk)

{ }

#define audit_enabled 0

#endif /* CONFIG_AUDIT */

static inline void audit_log_string(struct audit_buffer *ab, const char *buf)

{

	audit_log_n_string(ab, buf, strlen(buf));