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AUDIT: Allow filtering of user messages
Turn the field from a bitmask to an enumeration and add a list to allow filtering of messages generated by userspace. We also define a list for file system watches in anticipation of that feature. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
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0107b3cf32
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0f45aa18e6
3 changed files with 85 additions and 58 deletions
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@ -75,10 +75,15 @@
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#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
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/* Rule flags */
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#define AUDIT_PER_TASK 0x01 /* Apply rule at task creation (not syscall) */
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#define AUDIT_AT_ENTRY 0x02 /* Apply rule at syscall entry */
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#define AUDIT_AT_EXIT 0x04 /* Apply rule at syscall exit */
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#define AUDIT_PREPEND 0x10 /* Prepend to front of list */
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#define AUDIT_FILTER_USER 0x00 /* Apply rule to user-generated messages */
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#define AUDIT_FILTER_TASK 0x01 /* Apply rule at task creation (not syscall) */
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#define AUDIT_FILTER_ENTRY 0x02 /* Apply rule at syscall entry */
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#define AUDIT_FILTER_WATCH 0x03 /* Apply rule to file system watches */
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#define AUDIT_FILTER_EXIT 0x04 /* Apply rule at syscall exit */
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#define AUDIT_NR_FILTERS 5
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#define AUDIT_FILTER_PREPEND 0x10 /* Prepend to front of list */
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/* Rule actions */
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#define AUDIT_NEVER 0 /* Do not build context if rule matches */
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@ -230,6 +235,7 @@ extern int audit_socketcall(int nargs, unsigned long *args);
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extern int audit_sockaddr(int len, void *addr);
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extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
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extern void audit_signal_info(int sig, struct task_struct *t);
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extern int audit_filter_user(struct task_struct *tsk, int type);
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#else
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#define audit_alloc(t) ({ 0; })
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#define audit_free(t) do { ; } while (0)
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@ -246,6 +252,7 @@ extern void audit_signal_info(int sig, struct task_struct *t);
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#define audit_sockaddr(len, addr) ({ 0; })
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#define audit_avc_path(dentry, mnt) ({ 0; })
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#define audit_signal_info(s,t) do { ; } while (0)
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#define audit_filter_user(struct ({ 1; })
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#endif
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#ifdef CONFIG_AUDIT
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