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Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit
Pull audit updates from Paul Moore: "Seven audit patches for 4.5, all very minor despite the diffstat. The diffstat churn for linux/audit.h can be attributed to needing to reshuffle the linux/audit.h header to fix the seccomp auditing issue (see the commit description for details). Besides the seccomp/audit fix, most of the fixes are around trying to improve the connection with the audit daemon and a Kconfig simplification. Nothing crazy, and everything passes our little audit-testsuite" * 'upstream' of git://git.infradead.org/users/pcmoore/audit: audit: always enable syscall auditing when supported and audit is enabled audit: force seccomp event logging to honor the audit_enabled flag audit: Delete unnecessary checks before two function calls audit: wake up threads if queue switched from limited to unlimited audit: include auditd's threads in audit_log_start() wait exception audit: remove audit_backlog_wait_overflow audit: don't needlessly reset valid wait time
This commit is contained in:
Linus Torvalds
commit
2d663b5581
@ -113,6 +113,107 @@ struct filename;
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extern void audit_log_session_info(struct audit_buffer *ab);
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#ifdef CONFIG_AUDIT
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/* These are defined in audit.c */
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/* Public API */
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extern __printf(4, 5)
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void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
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const char *fmt, ...);
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extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
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extern __printf(2, 3)
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void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
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extern void audit_log_end(struct audit_buffer *ab);
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extern bool audit_string_contains_control(const char *string,
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size_t len);
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extern void audit_log_n_hex(struct audit_buffer *ab,
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const unsigned char *buf,
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size_t len);
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extern void audit_log_n_string(struct audit_buffer *ab,
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const char *buf,
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size_t n);
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extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
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const char *string,
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size_t n);
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extern void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string);
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extern void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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const struct path *path);
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extern void audit_log_key(struct audit_buffer *ab,
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char *key);
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extern void audit_log_link_denied(const char *operation,
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struct path *link);
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extern void audit_log_lost(const char *message);
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#ifdef CONFIG_SECURITY
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extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
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#else
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static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
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{ }
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#endif
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extern int audit_log_task_context(struct audit_buffer *ab);
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extern void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk);
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extern int audit_update_lsm_rules(void);
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/* Private API (for audit.c only) */
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extern int audit_filter_user(int type);
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extern int audit_filter_type(int type);
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extern int audit_rule_change(int type, __u32 portid, int seq,
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void *data, size_t datasz);
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extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
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extern u32 audit_enabled;
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#else /* CONFIG_AUDIT */
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static inline __printf(4, 5)
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void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
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const char *fmt, ...)
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{ }
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static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
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gfp_t gfp_mask, int type)
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{
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return NULL;
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}
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static inline __printf(2, 3)
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void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
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{ }
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static inline void audit_log_end(struct audit_buffer *ab)
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{ }
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static inline void audit_log_n_hex(struct audit_buffer *ab,
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const unsigned char *buf, size_t len)
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{ }
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static inline void audit_log_n_string(struct audit_buffer *ab,
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const char *buf, size_t n)
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{ }
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static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
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const char *string, size_t n)
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{ }
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static inline void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string)
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{ }
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static inline void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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const struct path *path)
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{ }
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static inline void audit_log_key(struct audit_buffer *ab, char *key)
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{ }
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static inline void audit_log_link_denied(const char *string,
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const struct path *link)
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{ }
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static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
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{ }
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static inline int audit_log_task_context(struct audit_buffer *ab)
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{
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return 0;
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}
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static inline void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk)
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{ }
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#define audit_enabled 0
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#endif /* CONFIG_AUDIT */
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#ifdef CONFIG_AUDIT_COMPAT_GENERIC
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#define audit_is_compat(arch) (!((arch) & __AUDIT_ARCH_64BIT))
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#else
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@ -212,6 +313,9 @@ void audit_core_dumps(long signr);
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static inline void audit_seccomp(unsigned long syscall, long signr, int code)
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{
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if (!audit_enabled)
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return;
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/* Force a record to be reported if a signal was delivered. */
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if (signr || unlikely(!audit_dummy_context()))
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__audit_seccomp(syscall, signr, code);
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@ -446,106 +550,6 @@ static inline bool audit_loginuid_set(struct task_struct *tsk)
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return uid_valid(audit_get_loginuid(tsk));
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}
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#ifdef CONFIG_AUDIT
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/* These are defined in audit.c */
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/* Public API */
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extern __printf(4, 5)
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void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
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const char *fmt, ...);
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extern struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type);
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extern __printf(2, 3)
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void audit_log_format(struct audit_buffer *ab, const char *fmt, ...);
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extern void audit_log_end(struct audit_buffer *ab);
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extern bool audit_string_contains_control(const char *string,
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size_t len);
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extern void audit_log_n_hex(struct audit_buffer *ab,
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const unsigned char *buf,
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size_t len);
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extern void audit_log_n_string(struct audit_buffer *ab,
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const char *buf,
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size_t n);
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extern void audit_log_n_untrustedstring(struct audit_buffer *ab,
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const char *string,
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size_t n);
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extern void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string);
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extern void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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const struct path *path);
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extern void audit_log_key(struct audit_buffer *ab,
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char *key);
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extern void audit_log_link_denied(const char *operation,
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struct path *link);
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extern void audit_log_lost(const char *message);
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#ifdef CONFIG_SECURITY
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extern void audit_log_secctx(struct audit_buffer *ab, u32 secid);
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#else
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static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
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{ }
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#endif
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extern int audit_log_task_context(struct audit_buffer *ab);
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extern void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk);
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extern int audit_update_lsm_rules(void);
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/* Private API (for audit.c only) */
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extern int audit_filter_user(int type);
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extern int audit_filter_type(int type);
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extern int audit_rule_change(int type, __u32 portid, int seq,
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void *data, size_t datasz);
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extern int audit_list_rules_send(struct sk_buff *request_skb, int seq);
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extern u32 audit_enabled;
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#else /* CONFIG_AUDIT */
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static inline __printf(4, 5)
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void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type,
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const char *fmt, ...)
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{ }
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static inline struct audit_buffer *audit_log_start(struct audit_context *ctx,
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gfp_t gfp_mask, int type)
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{
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return NULL;
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}
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static inline __printf(2, 3)
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void audit_log_format(struct audit_buffer *ab, const char *fmt, ...)
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{ }
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static inline void audit_log_end(struct audit_buffer *ab)
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{ }
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static inline void audit_log_n_hex(struct audit_buffer *ab,
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const unsigned char *buf, size_t len)
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{ }
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static inline void audit_log_n_string(struct audit_buffer *ab,
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const char *buf, size_t n)
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{ }
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static inline void audit_log_n_untrustedstring(struct audit_buffer *ab,
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const char *string, size_t n)
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{ }
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static inline void audit_log_untrustedstring(struct audit_buffer *ab,
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const char *string)
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{ }
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static inline void audit_log_d_path(struct audit_buffer *ab,
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const char *prefix,
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const struct path *path)
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{ }
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static inline void audit_log_key(struct audit_buffer *ab, char *key)
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{ }
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static inline void audit_log_link_denied(const char *string,
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const struct path *link)
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{ }
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static inline void audit_log_secctx(struct audit_buffer *ab, u32 secid)
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{ }
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static inline int audit_log_task_context(struct audit_buffer *ab)
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{
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return 0;
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}
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static inline void audit_log_task_info(struct audit_buffer *ab,
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struct task_struct *tsk)
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{ }
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#define audit_enabled 0
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#endif /* CONFIG_AUDIT */
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static inline void audit_log_string(struct audit_buffer *ab, const char *buf)
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{
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audit_log_n_string(ab, buf, strlen(buf));
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11
init/Kconfig
11
init/Kconfig
@ -299,20 +299,15 @@ config AUDIT
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help
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Enable auditing infrastructure that can be used with another
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kernel subsystem, such as SELinux (which requires this for
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logging of avc messages output). Does not do system-call
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auditing without CONFIG_AUDITSYSCALL.
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logging of avc messages output). System call auditing is included
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on architectures which support it.
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config HAVE_ARCH_AUDITSYSCALL
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bool
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config AUDITSYSCALL
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bool "Enable system-call auditing support"
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def_bool y
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depends on AUDIT && HAVE_ARCH_AUDITSYSCALL
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default y if SECURITY_SELINUX
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help
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Enable low-overhead system-call auditing infrastructure that
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can be used independently or with another kernel subsystem,
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such as SELinux.
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config AUDIT_WATCH
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def_bool y
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@ -110,7 +110,6 @@ static u32 audit_backlog_limit = 64;
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#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ)
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static u32 audit_backlog_wait_time_master = AUDIT_BACKLOG_WAIT_TIME;
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static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME;
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static u32 audit_backlog_wait_overflow = 0;
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/* The identity of the user shutting down the audit system. */
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kuid_t audit_sig_uid = INVALID_UID;
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@ -509,7 +508,6 @@ static void flush_hold_queue(void)
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* if auditd just disappeared but we
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* dequeued an skb we need to drop ref
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*/
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if (skb)
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consume_skb(skb);
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}
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@ -524,7 +522,8 @@ static int kauditd_thread(void *dummy)
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skb = skb_dequeue(&audit_skb_queue);
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if (skb) {
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if (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit)
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if (!audit_backlog_limit ||
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(skb_queue_len(&audit_skb_queue) <= audit_backlog_limit))
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wake_up(&audit_backlog_wait);
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if (audit_pid)
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kauditd_send_skb(skb);
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@ -1232,9 +1231,7 @@ static void audit_buffer_free(struct audit_buffer *ab)
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if (!ab)
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return;
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if (ab->skb)
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kfree_skb(ab->skb);
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spin_lock_irqsave(&audit_freelist_lock, flags);
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if (audit_freelist_count > AUDIT_MAXFREE)
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kfree(ab);
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@ -1372,7 +1369,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
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return NULL;
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if (gfp_mask & __GFP_DIRECT_RECLAIM) {
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if (audit_pid && audit_pid == current->pid)
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if (audit_pid && audit_pid == current->tgid)
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gfp_mask &= ~__GFP_DIRECT_RECLAIM;
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else
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reserve = 0;
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@ -1395,12 +1392,12 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
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skb_queue_len(&audit_skb_queue),
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audit_backlog_limit);
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audit_log_lost("backlog limit exceeded");
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audit_backlog_wait_time = audit_backlog_wait_overflow;
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audit_backlog_wait_time = 0;
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wake_up(&audit_backlog_wait);
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return NULL;
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}
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if (!reserve)
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if (!reserve && !audit_backlog_wait_time)
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audit_backlog_wait_time = audit_backlog_wait_time_master;
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ab = audit_buffer_alloc(ctx, gfp_mask, type);
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