Merge master.kernel.org:/pub/scm/linux/kernel/git/dwmw2/audit-2.6

arch/ppc/Kconfig

···
 
 source kernel/power/Kconfig
 
+config SECCOMP
+	bool "Enable seccomp to safely compute untrusted bytecode"
+	depends on PROC_FS
+	default y
+	help
+	  This kernel feature is useful for number crunching applications
+	  that may need to compute untrusted bytecode during their
+	  execution. By using pipes or other transports made available to
+	  the process as file descriptors supporting the read/write
+	  syscalls, it's possible to isolate those applications in
+	  their own address space using seccomp. Once seccomp is
+	  enabled via /proc/<pid>/seccomp, it cannot be disabled
+	  and the task is only allowed to execute a few safe syscalls
+	  defined by each seccomp mode.
+
+	  If unsure, say Y. Only embedded should say N here.
+
 endmenu
 
 config ISA_DMA_API

arch/ppc/kernel/entry.S

···
 	rlwinm	r11,r11,0,~_TIFL_FORCE_NOERROR
 	stw	r11,TI_LOCAL_FLAGS(r10)
 	lwz	r11,TI_FLAGS(r10)
-	andi.	r11,r11,_TIF_SYSCALL_TRACE
+	andi.	r11,r11,_TIF_SYSCALL_T_OR_A
 	bne-	syscall_dotrace
 syscall_dotrace_cont:
 	cmplwi	0,r0,NR_syscalls
···
 	SYNC
 	MTMSRD(r10)
 	lwz	r9,TI_FLAGS(r12)
-	andi.	r0,r9,(_TIF_SYSCALL_TRACE|_TIF_SIGPENDING|_TIF_NEED_RESCHED)
+	andi.	r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SIGPENDING|_TIF_NEED_RESCHED)
 	bne-	syscall_exit_work
 syscall_exit_cont:
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
···
 	SAVE_NVGPRS(r1)
 	li	r0,0xc00
 	stw	r0,TRAP(r1)
-	bl	do_syscall_trace
+	addi	r3,r1,STACK_FRAME_OVERHEAD
+	bl	do_syscall_trace_enter
 	lwz	r0,GPR0(r1)	/* Restore original registers */
 	lwz	r3,GPR3(r1)
 	lwz	r4,GPR4(r1)
···
 syscall_exit_work:
 	stw	r6,RESULT(r1)	/* Save result */
 	stw	r3,GPR3(r1)	/* Update return value */
-	andi.	r0,r9,_TIF_SYSCALL_TRACE
+	andi.	r0,r9,_TIF_SYSCALL_T_OR_A
 	beq	5f
 	ori	r10,r10,MSR_EE
 	SYNC
···
 	li	r4,0xc00
 	stw	r4,TRAP(r1)
 4:
-	bl	do_syscall_trace
+	addi	r3,r1,STACK_FRAME_OVERHEAD
+	bl	do_syscall_trace_leave
 	REST_NVGPRS(r1)
 2:
 	lwz	r3,GPR3(r1)
···
 	subi	r1,r3,STACK_FRAME_OVERHEAD
 	rlwinm	r12,r1,0,0,18	/* current_thread_info() */
 	lwz	r9,TI_FLAGS(r12)
-	andi.	r0,r9,_TIF_SYSCALL_TRACE
-	bnel-	do_syscall_trace
+	andi.	r0,r9,_TIF_SYSCALL_T_OR_A
+	bnel-	do_syscall_trace_leave
 	/* fall through */
 
 	.globl	ret_from_except_full

arch/ppc/kernel/ppc_ksyms.c

···
 #define EXPORT_SYMTAB_STROPS
 
 extern void transfer_to_handler(void);
-extern void do_syscall_trace(void);
 extern void do_IRQ(struct pt_regs *regs);
 extern void MachineCheckException(struct pt_regs *regs);
 extern void AlignmentException(struct pt_regs *regs);
···
 EXPORT_SYMBOL(clear_pages);
 EXPORT_SYMBOL(clear_user_page);
 EXPORT_SYMBOL(do_signal);
-EXPORT_SYMBOL(do_syscall_trace);
 EXPORT_SYMBOL(transfer_to_handler);
 EXPORT_SYMBOL(do_IRQ);
 EXPORT_SYMBOL(MachineCheckException);

arch/ppc/kernel/ptrace.c

···
 #include <linux/user.h>
 #include <linux/security.h>
 #include <linux/signal.h>
+#include <linux/seccomp.h>
+#include <linux/audit.h>
+#include <linux/module.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
···
 	return ret;
 }
 
-void do_syscall_trace(void)
+static void do_syscall_trace(void)
 {
-        if (!test_thread_flag(TIF_SYSCALL_TRACE)
-	    || !(current->ptrace & PT_PTRACED))
-		return;
+	/* the 0x80 provides a way for the tracing parent to distinguish
+	   between a syscall stop and SIGTRAP delivery */
 	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
 				 ? 0x80 : 0));
 
···
 		current->exit_code = 0;
 	}
 }
+
+void do_syscall_trace_enter(struct pt_regs *regs)
+{
+	if (test_thread_flag(TIF_SYSCALL_TRACE)
+	    && (current->ptrace & PT_PTRACED))
+		do_syscall_trace();
+
+	if (unlikely(current->audit_context))
+		audit_syscall_entry(current, AUDIT_ARCH_PPC,
+				    regs->gpr[0],
+				    regs->gpr[3], regs->gpr[4],
+				    regs->gpr[5], regs->gpr[6]);
+}
+
+void do_syscall_trace_leave(struct pt_regs *regs)
+{
+	secure_computing(regs->gpr[0]);
+
+	if (unlikely(current->audit_context))
+		audit_syscall_exit(current,
+				   (regs->ccr&0x1000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
+				   regs->result);
+
+	if ((test_thread_flag(TIF_SYSCALL_TRACE))
+	    && (current->ptrace & PT_PTRACED))
+		do_syscall_trace();
+}
+
+EXPORT_SYMBOL(do_syscall_trace_enter);
+EXPORT_SYMBOL(do_syscall_trace_leave);

include/asm-ppc/seccomp.h

···
+#ifndef _ASM_SECCOMP_H
+
+#include <linux/unistd.h>
+
+#define __NR_seccomp_read __NR_read
+#define __NR_seccomp_write __NR_write
+#define __NR_seccomp_exit __NR_exit
+#define __NR_seccomp_sigreturn __NR_rt_sigreturn
+
+#endif /* _ASM_SECCOMP_H */

include/asm-ppc/thread_info.h

···
 #define TIF_POLLING_NRFLAG	4	/* true if poll_idle() is polling
 					   TIF_NEED_RESCHED */
 #define TIF_MEMDIE		5
+#define TIF_SYSCALL_AUDIT       6       /* syscall auditing active */
+#define TIF_SECCOMP             7      /* secure computing */
+
 /* as above, but as bit values */
 #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
 #define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
 #define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
 #define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
 #define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
+#define _TIF_SYSCALL_AUDIT      (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP            (1<<TIF_SECCOMP)
+
+#define _TIF_SYSCALL_T_OR_A     (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
 
 /*
  * Non racy (local) flags bit numbers

include/linux/audit.h

···
 #include <linux/sched.h>
 #include <linux/elf.h>
 
-/* Request and reply types */
-#define AUDIT_GET      1000	/* Get status */
-#define AUDIT_SET      1001	/* Set status (enable/disable/auditd) */
-#define AUDIT_LIST     1002	/* List filtering rules */
-#define AUDIT_ADD      1003	/* Add filtering rule */
-#define AUDIT_DEL      1004	/* Delete filtering rule */
-#define AUDIT_USER     1005	/* Send a message from user-space */
-#define AUDIT_LOGIN    1006     /* Define the login id and informaiton */
-#define AUDIT_KERNEL   2000	/* Asynchronous audit record. NOT A REQUEST. */
+/* The netlink messages for the audit system is divided into blocks:
+ * 1000 - 1099 are for commanding the audit system
+ * 1100 - 1199 user space trusted application messages
+ * 1200 - 1299 messages internal to the audit daemon
+ * 1300 - 1399 audit event messages
+ * 1400 - 1499 SE Linux use
+ * 1500 - 1999 future use
+ * 2000 is for otherwise unclassified kernel audit messages
+ *
+ * Messages from 1000-1199 are bi-directional. 1200-1299 are exclusively user
+ * space. Anything over that is kernel --> user space communication.
+ */
+#define AUDIT_GET		1000	/* Get status */
+#define AUDIT_SET		1001	/* Set status (enable/disable/auditd) */
+#define AUDIT_LIST		1002	/* List syscall filtering rules */
+#define AUDIT_ADD		1003	/* Add syscall filtering rule */
+#define AUDIT_DEL		1004	/* Delete syscall filtering rule */
+#define AUDIT_USER		1005	/* Message from userspace -- deprecated */
+#define AUDIT_LOGIN		1006	/* Define the login id and information */
+#define AUDIT_WATCH_INS		1007	/* Insert file/dir watch entry */
+#define AUDIT_WATCH_REM		1008	/* Remove file/dir watch entry */
+#define AUDIT_WATCH_LIST	1009	/* List all file/dir watches */
+#define AUDIT_SIGNAL_INFO	1010	/* Get info about sender of signal to auditd */
+
+#define AUDIT_FIRST_USER_MSG	1100	/* Userspace messages uninteresting to kernel */
+#define AUDIT_LAST_USER_MSG	1199
+ 
+#define AUDIT_DAEMON_START      1200    /* Daemon startup record */
+#define AUDIT_DAEMON_END        1201    /* Daemon normal stop record */
+#define AUDIT_DAEMON_ABORT      1202    /* Daemon error stop record */
+#define AUDIT_DAEMON_CONFIG     1203    /* Daemon config change */
+
+#define AUDIT_SYSCALL		1300	/* Syscall event */
+#define AUDIT_FS_WATCH		1301	/* Filesystem watch event */
+#define AUDIT_PATH		1302	/* Filename path information */
+#define AUDIT_IPC		1303	/* IPC record */
+#define AUDIT_SOCKETCALL	1304	/* sys_socketcall arguments */
+#define AUDIT_CONFIG_CHANGE	1305	/* Audit system configuration change */
+#define AUDIT_SOCKADDR		1306	/* sockaddr copied as syscall arg */
+#define AUDIT_CWD		1307	/* Current working directory */
+
+#define AUDIT_AVC		1400	/* SE Linux avc denial or grant */
+#define AUDIT_SELINUX_ERR	1401	/* Internal SE Linux Errors */
+#define AUDIT_AVC_PATH		1402	/* dentry, vfsmount pair from avc */
+
+#define AUDIT_KERNEL		2000	/* Asynchronous audit record. NOT A REQUEST. */
 
 /* Rule flags */
 #define AUDIT_PER_TASK 0x01	/* Apply rule at task creation (not syscall) */
···
 #define AUDIT_ARCH_V850		(EM_V850|__AUDIT_ARCH_LE)
 #define AUDIT_ARCH_X86_64	(EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
 
-#ifndef __KERNEL__
-struct audit_message {
-	struct nlmsghdr nlh;
-	char		data[1200];
-};
-#endif
-
 struct audit_status {
 	__u32		mask;		/* Bit mask for valid entries */
-	__u32		enabled;	/* 1 = enabled, 0 = disbaled */
+	__u32		enabled;	/* 1 = enabled, 0 = disabled */
 	__u32		failure;	/* Failure-to-log action */
 	__u32		pid;		/* pid of auditd process */
 	__u32		rate_limit;	/* messages rate limit (per second) */
···
 };
 
 #ifdef __KERNEL__
+
+struct audit_sig_info {
+	uid_t		uid;
+	pid_t		pid;
+};
 
 struct audit_buffer;
 struct audit_context;
···
 				/* Private API (for audit.c only) */
 extern int  audit_receive_filter(int type, int pid, int uid, int seq,
 				 void *data, uid_t loginuid);
-extern void audit_get_stamp(struct audit_context *ctx,
-			    struct timespec *t, unsigned int *serial);
+extern unsigned int audit_serial(void);
+extern void auditsc_get_stamp(struct audit_context *ctx,
+			      struct timespec *t, unsigned int *serial);
 extern int  audit_set_loginuid(struct task_struct *task, uid_t loginuid);
 extern uid_t audit_get_loginuid(struct audit_context *ctx);
 extern int audit_ipc_perms(unsigned long qbytes, uid_t uid, gid_t gid, mode_t mode);
+extern int audit_socketcall(int nargs, unsigned long *args);
+extern int audit_sockaddr(int len, void *addr);
+extern int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt);
+extern void audit_signal_info(int sig, struct task_struct *t);
 #else
 #define audit_alloc(t) ({ 0; })
 #define audit_free(t) do { ; } while (0)
···
 #define audit_getname(n) do { ; } while (0)
 #define audit_putname(n) do { ; } while (0)
 #define audit_inode(n,i) do { ; } while (0)
+#define audit_receive_filter(t,p,u,s,d,l) ({ -EOPNOTSUPP; })
+#define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
 #define audit_get_loginuid(c) ({ -1; })
 #define audit_ipc_perms(q,u,g,m) ({ 0; })
+#define audit_socketcall(n,a) ({ 0; })
+#define audit_sockaddr(len, addr) ({ 0; })
+#define audit_avc_path(dentry, mnt) ({ 0; })
+#define audit_signal_info(s,t) do { ; } while (0)
 #endif
 
 #ifdef CONFIG_AUDIT
 /* These are defined in audit.c */
 				/* Public API */
-extern void		    audit_log(struct audit_context *ctx,
+extern void		    audit_log(struct audit_context *ctx, int type,
 				      const char *fmt, ...)
-			    __attribute__((format(printf,2,3)));
+			    __attribute__((format(printf,3,4)));
 
-extern struct audit_buffer *audit_log_start(struct audit_context *ctx);
+extern struct audit_buffer *audit_log_start(struct audit_context *ctx,int type);
 extern void		    audit_log_format(struct audit_buffer *ab,
 					     const char *fmt, ...)
 			    __attribute__((format(printf,2,3)));
···
 					     void *payload, int size);
 extern void		    audit_log_lost(const char *message);
 #else
-#define audit_log(t,f,...) do { ; } while (0)
-#define audit_log_start(t) ({ NULL; })
+#define audit_log(c,t,f,...) do { ; } while (0)
+#define audit_log_start(c,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)

init/Kconfig

···
 
 config AUDIT
 	bool "Auditing support"
+	depends on NET
 	default y if SECURITY_SELINUX
 	help
 	  Enable auditing infrastructure that can be used with another
···
 
 config AUDITSYSCALL
 	bool "Enable system-call auditing support"
-	depends on AUDIT && (X86 || PPC64 || ARCH_S390 || IA64 || UML)
+	depends on AUDIT && (X86 || PPC || PPC64 || ARCH_S390 || IA64 || UML)
 	default y if SECURITY_SELINUX
 	help
 	  Enable low-overhead system-call auditing infrastructure that

kernel/audit.c

···
 #include <asm/types.h>
 #include <linux/mm.h>
 #include <linux/module.h>
+#include <linux/err.h>
+#include <linux/kthread.h>
 
 #include <linux/audit.h>
 
···
 
 /* If audit records are to be written to the netlink socket, audit_pid
  * contains the (non-zero) pid. */
-static int	audit_pid;
+int		audit_pid;
 
 /* If audit_limit is non-zero, limit the rate of sending audit records
  * to that number per second.  This prevents DoS attacks, but results in
···
 
 /* Number of outstanding audit_buffers allowed. */
 static int	audit_backlog_limit = 64;
-static atomic_t	audit_backlog	    = ATOMIC_INIT(0);
+
+/* The identity of the user shutting down the audit system. */
+uid_t		audit_sig_uid = -1;
+pid_t		audit_sig_pid = -1;
 
 /* Records can be lost in several ways:
    0) [suppressed in audit_alloc]
···
 /* The netlink socket. */
 static struct sock *audit_sock;
 
-/* There are two lists of audit buffers.  The txlist contains audit
- * buffers that cannot be sent immediately to the netlink device because
- * we are in an irq context (these are sent later in a tasklet).
- *
- * The second list is a list of pre-allocated audit buffers (if more
+/* The audit_freelist is a list of pre-allocated audit buffers (if more
  * than AUDIT_MAXFREE are in use, the audit buffer is freed instead of
  * being placed on the freelist). */
-static DEFINE_SPINLOCK(audit_txlist_lock);
 static DEFINE_SPINLOCK(audit_freelist_lock);
 static int	   audit_freelist_count = 0;
-static LIST_HEAD(audit_txlist);
 static LIST_HEAD(audit_freelist);
+
+static struct sk_buff_head audit_skb_queue;
+static struct task_struct *kauditd_task;
+static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait);
 
 /* There are three lists of rules -- one to search at task creation
  * time, one to search at syscall entry time, and another to search at
···
 static LIST_HEAD(audit_extlist);
 
 /* The netlink socket is only to be read by 1 CPU, which lets us assume
- * that list additions and deletions never happen simultaneiously in
+ * that list additions and deletions never happen simultaneously in
  * auditsc.c */
 static DECLARE_MUTEX(audit_netlink_sem);
 
···
  * use simultaneously. */
 struct audit_buffer {
 	struct list_head     list;
-	struct sk_buff_head  sklist;	/* formatted skbs ready to send */
+	struct sk_buff       *skb;	/* formatted skb ready to send */
 	struct audit_context *ctx;	/* NULL or associated context */
-	int		     len;	/* used area of tmp */
-	char		     tmp[AUDIT_BUFSIZ];
-
-				/* Pointer to header and contents */
-	struct nlmsghdr      *nlh;
-	int		     total;
-	int		     type;
-	int		     pid;
 };
 
-void audit_set_type(struct audit_buffer *ab, int type)
+static void audit_set_pid(struct audit_buffer *ab, pid_t pid)
 {
-	ab->type = type;
+	struct nlmsghdr *nlh = (struct nlmsghdr *)ab->skb->data;
+	nlh->nlmsg_pid = pid;
 }
 
 struct audit_entry {
 	struct list_head  list;
 	struct audit_rule rule;
 };
-
-static void audit_log_end_irq(struct audit_buffer *ab);
-static void audit_log_end_fast(struct audit_buffer *ab);
 
 static void audit_panic(const char *message)
 {
···
 
 	if (print) {
 		printk(KERN_WARNING
-		       "audit: audit_lost=%d audit_backlog=%d"
-		       " audit_rate_limit=%d audit_backlog_limit=%d\n",
+		       "audit: audit_lost=%d audit_rate_limit=%d audit_backlog_limit=%d\n",
 		       atomic_read(&audit_lost),
-		       atomic_read(&audit_backlog),
 		       audit_rate_limit,
 		       audit_backlog_limit);
 		audit_panic(message);
···
 {
 	int old		 = audit_rate_limit;
 	audit_rate_limit = limit;
-	audit_log(NULL, "audit_rate_limit=%d old=%d by auid %u",
+	audit_log(NULL, AUDIT_CONFIG_CHANGE, 
+			"audit_rate_limit=%d old=%d by auid=%u",
 			audit_rate_limit, old, loginuid);
 	return old;
 }
···
 {
 	int old		 = audit_backlog_limit;
 	audit_backlog_limit = limit;
-	audit_log(NULL, "audit_backlog_limit=%d old=%d by auid %u",
+	audit_log(NULL, AUDIT_CONFIG_CHANGE,
+			"audit_backlog_limit=%d old=%d by auid=%u",
 			audit_backlog_limit, old, loginuid);
 	return old;
 }
···
 	if (state != 0 && state != 1)
 		return -EINVAL;
 	audit_enabled = state;
-	audit_log(NULL, "audit_enabled=%d old=%d by auid %u",
-		  audit_enabled, old, loginuid);
+	audit_log(NULL, AUDIT_CONFIG_CHANGE,
+			"audit_enabled=%d old=%d by auid=%u",
+			audit_enabled, old, loginuid);
 	return old;
 }
 
···
 	    && state != AUDIT_FAIL_PANIC)
 		return -EINVAL;
 	audit_failure = state;
-	audit_log(NULL, "audit_failure=%d old=%d by auid %u",
-		  audit_failure, old, loginuid);
+	audit_log(NULL, AUDIT_CONFIG_CHANGE,
+			"audit_failure=%d old=%d by auid=%u",
+			audit_failure, old, loginuid);
 	return old;
 }
 
-#ifdef CONFIG_NET
+int kauditd_thread(void *dummy)
+{
+	struct sk_buff *skb;
+
+	while (1) {
+		skb = skb_dequeue(&audit_skb_queue);
+		if (skb) {
+			if (audit_pid) {
+				int err = netlink_unicast(audit_sock, skb, audit_pid, 0);
+				if (err < 0) {
+					BUG_ON(err != -ECONNREFUSED); /* Shoudn't happen */
+					printk(KERN_ERR "audit: *NO* daemon at audit_pid=%d\n", audit_pid);
+					audit_pid = 0;
+				}
+			} else {
+				printk(KERN_ERR "%s\n", skb->data + NLMSG_SPACE(0));
+				kfree_skb(skb);
+			}
+		} else {
+			DECLARE_WAITQUEUE(wait, current);
+			set_current_state(TASK_INTERRUPTIBLE);
+			add_wait_queue(&kauditd_wait, &wait);
+
+			if (!skb_queue_len(&audit_skb_queue))
+				schedule();
+
+			__set_current_state(TASK_RUNNING);
+			remove_wait_queue(&kauditd_wait, &wait);
+		}
+	}
+}
+
 void audit_send_reply(int pid, int seq, int type, int done, int multi,
 		      void *payload, int size)
 {
···
 
 	skb = alloc_skb(len, GFP_KERNEL);
 	if (!skb)
-		goto nlmsg_failure;
+		return;
 
-	nlh		 = NLMSG_PUT(skb, pid, seq, t, len - sizeof(*nlh));
+	nlh		 = NLMSG_PUT(skb, pid, seq, t, size);
 	nlh->nlmsg_flags = flags;
 	data		 = NLMSG_DATA(nlh);
 	memcpy(data, payload, size);
-	netlink_unicast(audit_sock, skb, pid, MSG_DONTWAIT);
+
+	/* Ignore failure. It'll only happen if the sender goes away,
+	   because our timeout is set to infinite. */
+	netlink_unicast(audit_sock, skb, pid, 0);
 	return;
 
 nlmsg_failure:			/* Used by NLMSG_PUT */
···
 	case AUDIT_SET:
 	case AUDIT_ADD:
 	case AUDIT_DEL:
+	case AUDIT_SIGNAL_INFO:
 		if (!cap_raised(eff_cap, CAP_AUDIT_CONTROL))
 			err = -EPERM;
 		break;
 	case AUDIT_USER:
+	case AUDIT_FIRST_USER_MSG...AUDIT_LAST_USER_MSG:
 		if (!cap_raised(eff_cap, CAP_AUDIT_WRITE))
 			err = -EPERM;
 		break;
···
 	struct audit_buffer	*ab;
 	u16			msg_type = nlh->nlmsg_type;
 	uid_t			loginuid; /* loginuid of sender */
+	struct audit_sig_info   sig_data;
 
 	err = audit_netlink_ok(NETLINK_CB(skb).eff_cap, msg_type);
 	if (err)
 		return err;
+
+	/* As soon as there's any sign of userspace auditd, start kauditd to talk to it */
+	if (!kauditd_task)
+		kauditd_task = kthread_run(kauditd_thread, NULL, "kauditd");
+	if (IS_ERR(kauditd_task)) {
+		err = PTR_ERR(kauditd_task);
+		kauditd_task = NULL;
+		return err;
+	}
 
 	pid  = NETLINK_CREDS(skb)->pid;
 	uid  = NETLINK_CREDS(skb)->uid;
···
 		status_set.rate_limit	 = audit_rate_limit;
 		status_set.backlog_limit = audit_backlog_limit;
 		status_set.lost		 = atomic_read(&audit_lost);
-		status_set.backlog	 = atomic_read(&audit_backlog);
+		status_set.backlog	 = skb_queue_len(&audit_skb_queue);
 		audit_send_reply(NETLINK_CB(skb).pid, seq, AUDIT_GET, 0, 0,
 				 &status_set, sizeof(status_set));
 		break;
···
 		if (status_get->mask & AUDIT_STATUS_PID) {
 			int old   = audit_pid;
 			audit_pid = status_get->pid;
-			audit_log(NULL, "audit_pid=%d old=%d by auid %u",
+			audit_log(NULL, AUDIT_CONFIG_CHANGE,
+				"audit_pid=%d old=%d by auid=%u",
 				  audit_pid, old, loginuid);
 		}
 		if (status_get->mask & AUDIT_STATUS_RATE_LIMIT)
···
 							loginuid);
 		break;
 	case AUDIT_USER:
-		ab = audit_log_start(NULL);
+	case AUDIT_FIRST_USER_MSG...AUDIT_LAST_USER_MSG:
+		ab = audit_log_start(NULL, msg_type);
 		if (!ab)
 			break;	/* audit_panic has been called */
 		audit_log_format(ab,
-				 "user pid=%d uid=%d length=%d loginuid=%u"
+				 "user pid=%d uid=%u auid=%u"
 				 " msg='%.1024s'",
-				 pid, uid,
-				 (int)(nlh->nlmsg_len
-				       - ((char *)data - (char *)nlh)),
-				 loginuid, (char *)data);
-		ab->type = AUDIT_USER;
-		ab->pid  = pid;
+				 pid, uid, loginuid, (char *)data);
+		audit_set_pid(ab, pid);
 		audit_log_end(ab);
 		break;
 	case AUDIT_ADD:
···
 			return -EINVAL;
 		/* fallthrough */
 	case AUDIT_LIST:
-#ifdef CONFIG_AUDITSYSCALL
 		err = audit_receive_filter(nlh->nlmsg_type, NETLINK_CB(skb).pid,
 					   uid, seq, data, loginuid);
-#else
-		err = -EOPNOTSUPP;
-#endif
+		break;
+	case AUDIT_SIGNAL_INFO:
+		sig_data.uid = audit_sig_uid;
+		sig_data.pid = audit_sig_pid;
+		audit_send_reply(NETLINK_CB(skb).pid, seq, AUDIT_SIGNAL_INFO, 
+				0, 0, &sig_data, sizeof(sig_data));
 		break;
 	default:
 		err = -EINVAL;
···
 	up(&audit_netlink_sem);
 }
 
-/* Move data from tmp buffer into an skb.  This is an extra copy, and
- * that is unfortunate.  However, the copy will only occur when a record
- * is being written to user space, which is already a high-overhead
- * operation.  (Elimination of the copy is possible, for example, by
- * writing directly into a pre-allocated skb, at the cost of wasting
- * memory. */
-static void audit_log_move(struct audit_buffer *ab)
-{
-	struct sk_buff	*skb;
-	char		*start;
-	int		extra = ab->nlh ? 0 : NLMSG_SPACE(0);
-
-	/* possible resubmission */
-	if (ab->len == 0)
-		return;
-
-	skb = skb_peek_tail(&ab->sklist);
-	if (!skb || skb_tailroom(skb) <= ab->len + extra) {
-		skb = alloc_skb(2 * ab->len + extra, GFP_ATOMIC);
-		if (!skb) {
-			ab->len = 0; /* Lose information in ab->tmp */
-			audit_log_lost("out of memory in audit_log_move");
-			return;
-		}
-		__skb_queue_tail(&ab->sklist, skb);
-		if (!ab->nlh)
-			ab->nlh = (struct nlmsghdr *)skb_put(skb,
-							     NLMSG_SPACE(0));
-	}
-	start = skb_put(skb, ab->len);
-	memcpy(start, ab->tmp, ab->len);
-	ab->len = 0;
-}
-
-/* Iterate over the skbuff in the audit_buffer, sending their contents
- * to user space. */
-static inline int audit_log_drain(struct audit_buffer *ab)
-{
-	struct sk_buff *skb;
-
-	while ((skb = skb_dequeue(&ab->sklist))) {
-		int retval = 0;
-
-		if (audit_pid) {
-			if (ab->nlh) {
-				ab->nlh->nlmsg_len   = ab->total;
-				ab->nlh->nlmsg_type  = ab->type;
-				ab->nlh->nlmsg_flags = 0;
-				ab->nlh->nlmsg_seq   = 0;
-				ab->nlh->nlmsg_pid   = ab->pid;
-			}
-			skb_get(skb); /* because netlink_* frees */
-			retval = netlink_unicast(audit_sock, skb, audit_pid,
-						 MSG_DONTWAIT);
-		}
-		if (retval == -EAGAIN &&
-		    (atomic_read(&audit_backlog)) < audit_backlog_limit) {
-			skb_queue_head(&ab->sklist, skb);
-			audit_log_end_irq(ab);
-			return 1;
-		}
-		if (retval < 0) {
-			if (retval == -ECONNREFUSED) {
-				printk(KERN_ERR
-				       "audit: *NO* daemon at audit_pid=%d\n",
-				       audit_pid);
-				audit_pid = 0;
-			} else
-				audit_log_lost("netlink socket too busy");
-		}
-		if (!audit_pid) { /* No daemon */
-			int offset = ab->nlh ? NLMSG_SPACE(0) : 0;
-			int len    = skb->len - offset;
-			skb->data[offset + len] = '\0';
-			printk(KERN_ERR "%s\n", skb->data + offset);
-		}
-		kfree_skb(skb);
-		ab->nlh = NULL;
-	}
-	return 0;
-}
 
 /* Initialize audit support at boot time. */
 static int __init audit_init(void)
···
 	if (!audit_sock)
 		audit_panic("cannot initialize netlink socket");
 
+	audit_sock->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
+	skb_queue_head_init(&audit_skb_queue);
 	audit_initialized = 1;
 	audit_enabled = audit_default;
-	audit_log(NULL, "initialized");
+	audit_log(NULL, AUDIT_KERNEL, "initialized");
 	return 0;
 }
-
-#else
-/* Without CONFIG_NET, we have no skbuffs.  For now, print what we have
- * in the buffer. */
-static void audit_log_move(struct audit_buffer *ab)
-{
-	printk(KERN_ERR "%*.*s\n", ab->len, ab->len, ab->tmp);
-	ab->len = 0;
-}
-
-static inline int audit_log_drain(struct audit_buffer *ab)
-{
-	return 0;
-}
-
-/* Initialize audit support at boot time. */
-int __init audit_init(void)
-{
-	printk(KERN_INFO "audit: initializing WITHOUT netlink support\n");
-	audit_sock = NULL;
-	audit_pid  = 0;
-
-	audit_initialized = 1;
-	audit_enabled = audit_default;
-	audit_log(NULL, "initialized");
-	return 0;
-}
-#endif
-
 __initcall(audit_init);
 
 /* Process kernel command-line parameter at boot time.  audit=0 or audit=1. */
···
 
 __setup("audit=", audit_enable);
 
-
-/* Obtain an audit buffer.  This routine does locking to obtain the
- * audit buffer, but then no locking is required for calls to
- * audit_log_*format.  If the tsk is a task that is currently in a
- * syscall, then the syscall is marked as auditable and an audit record
- * will be written at syscall exit.  If there is no associated task, tsk
- * should be NULL. */
-struct audit_buffer *audit_log_start(struct audit_context *ctx)
+static void audit_buffer_free(struct audit_buffer *ab)
 {
-	struct audit_buffer	*ab	= NULL;
-	unsigned long		flags;
-	struct timespec		t;
-	unsigned int		serial;
+	unsigned long flags;
 
-	if (!audit_initialized)
-		return NULL;
+	if (!ab)
+		return;
 
-	if (audit_backlog_limit
-	    && atomic_read(&audit_backlog) > audit_backlog_limit) {
-		if (audit_rate_check())
-			printk(KERN_WARNING
-			       "audit: audit_backlog=%d > "
-			       "audit_backlog_limit=%d\n",
-			       atomic_read(&audit_backlog),
-			       audit_backlog_limit);
-		audit_log_lost("backlog limit exceeded");
-		return NULL;
-	}
+	if (ab->skb)
+		kfree_skb(ab->skb);
+
+	spin_lock_irqsave(&audit_freelist_lock, flags);
+	if (++audit_freelist_count > AUDIT_MAXFREE)
+		kfree(ab);
+	else
+		list_add(&ab->list, &audit_freelist);
+	spin_unlock_irqrestore(&audit_freelist_lock, flags);
+}
+
+static struct audit_buffer * audit_buffer_alloc(struct audit_context *ctx,
+						int gfp_mask, int type)
+{
+	unsigned long flags;
+	struct audit_buffer *ab = NULL;
+	struct nlmsghdr *nlh;
 
 	spin_lock_irqsave(&audit_freelist_lock, flags);
 	if (!list_empty(&audit_freelist)) {
···
 	}
 	spin_unlock_irqrestore(&audit_freelist_lock, flags);
 
-	if (!ab)
-		ab = kmalloc(sizeof(*ab), GFP_ATOMIC);
+	if (!ab) {
+		ab = kmalloc(sizeof(*ab), gfp_mask);
+		if (!ab)
+			goto err;
+	}
+
+	ab->skb = alloc_skb(AUDIT_BUFSIZ, gfp_mask);
+	if (!ab->skb)
+		goto err;
+
+	ab->ctx = ctx;
+	nlh = (struct nlmsghdr *)skb_put(ab->skb, NLMSG_SPACE(0));
+	nlh->nlmsg_type = type;
+	nlh->nlmsg_flags = 0;
+	nlh->nlmsg_pid = 0;
+	nlh->nlmsg_seq = 0;
+	return ab;
+err:
+	audit_buffer_free(ab);
+	return NULL;
+}
+
+/* Compute a serial number for the audit record.  Audit records are
+ * written to user-space as soon as they are generated, so a complete
+ * audit record may be written in several pieces.  The timestamp of the
+ * record and this serial number are used by the user-space tools to
+ * determine which pieces belong to the same audit record.  The
+ * (timestamp,serial) tuple is unique for each syscall and is live from
+ * syscall entry to syscall exit.
+ *
+ * Atomic values are only guaranteed to be 24-bit, so we count down.
+ *
+ * NOTE: Another possibility is to store the formatted records off the
+ * audit context (for those records that have a context), and emit them
+ * all at syscall exit.  However, this could delay the reporting of
+ * significant errors until syscall exit (or never, if the system
+ * halts). */
+unsigned int audit_serial(void)
+{
+	static atomic_t serial = ATOMIC_INIT(0xffffff);
+	unsigned int a, b;
+
+	do {
+		a = atomic_read(&serial);
+		if (atomic_dec_and_test(&serial))
+			atomic_set(&serial, 0xffffff);
+		b = atomic_read(&serial);
+	} while (b != a - 1);
+
+	return 0xffffff - b;
+}
+
+static inline void audit_get_stamp(struct audit_context *ctx, 
+				   struct timespec *t, unsigned int *serial)
+{
+	if (ctx)
+		auditsc_get_stamp(ctx, t, serial);
+	else {
+		*t = CURRENT_TIME;
+		*serial = audit_serial();
+	}
+}
+
+/* Obtain an audit buffer.  This routine does locking to obtain the
+ * audit buffer, but then no locking is required for calls to
+ * audit_log_*format.  If the tsk is a task that is currently in a
+ * syscall, then the syscall is marked as auditable and an audit record
+ * will be written at syscall exit.  If there is no associated task, tsk
+ * should be NULL. */
+struct audit_buffer *audit_log_start(struct audit_context *ctx, int type)
+{
+	struct audit_buffer	*ab	= NULL;
+	struct timespec		t;
+	unsigned int		serial;
+
+	if (!audit_initialized)
+		return NULL;
+
+	if (audit_backlog_limit
+	    && skb_queue_len(&audit_skb_queue) > audit_backlog_limit) {
+		if (audit_rate_check())
+			printk(KERN_WARNING
+			       "audit: audit_backlog=%d > "
+			       "audit_backlog_limit=%d\n",
+			       skb_queue_len(&audit_skb_queue),
+			       audit_backlog_limit);
+		audit_log_lost("backlog limit exceeded");
+		return NULL;
+	}
+
+	ab = audit_buffer_alloc(ctx, GFP_ATOMIC, type);
 	if (!ab) {
 		audit_log_lost("out of memory in audit_log_start");
 		return NULL;
 	}
 
-	atomic_inc(&audit_backlog);
-	skb_queue_head_init(&ab->sklist);
+	audit_get_stamp(ab->ctx, &t, &serial);
 
-	ab->ctx   = ctx;
-	ab->len   = 0;
-	ab->nlh   = NULL;
-	ab->total = 0;
-	ab->type  = AUDIT_KERNEL;
-	ab->pid   = 0;
-
-#ifdef CONFIG_AUDITSYSCALL
-	if (ab->ctx)
-		audit_get_stamp(ab->ctx, &t, &serial);
-	else
-#endif
-	{
-		t = CURRENT_TIME;
-		serial = 0;
-	}
 	audit_log_format(ab, "audit(%lu.%03lu:%u): ",
 			 t.tv_sec, t.tv_nsec/1000000, serial);
 	return ab;
 }
 
+/**
+ * audit_expand - expand skb in the audit buffer
+ * @ab: audit_buffer
+ *
+ * Returns 0 (no space) on failed expansion, or available space if
+ * successful.
+ */
+static inline int audit_expand(struct audit_buffer *ab, int extra)
+{
+	struct sk_buff *skb = ab->skb;
+	int ret = pskb_expand_head(skb, skb_headroom(skb), extra,
+				   GFP_ATOMIC);
+	if (ret < 0) {
+		audit_log_lost("out of memory in audit_expand");
+		return 0;
+	}
+	return skb_tailroom(skb);
+}
 
 /* Format an audit message into the audit buffer.  If there isn't enough
  * room in the audit buffer, more room will be allocated and vsnprint
···
 			      va_list args)
 {
 	int len, avail;
+	struct sk_buff *skb;
+	va_list args2;
 
 	if (!ab)
 		return;
 
-	avail = sizeof(ab->tmp) - ab->len;
-	if (avail <= 0) {
-		audit_log_move(ab);
-		avail = sizeof(ab->tmp) - ab->len;
+	BUG_ON(!ab->skb);
+	skb = ab->skb;
+	avail = skb_tailroom(skb);
+	if (avail == 0) {
+		avail = audit_expand(ab, AUDIT_BUFSIZ);
+		if (!avail)
+			goto out;
 	}
-	len   = vsnprintf(ab->tmp + ab->len, avail, fmt, args);
+	va_copy(args2, args);
+	len = vsnprintf(skb->tail, avail, fmt, args);
 	if (len >= avail) {
 		/* The printk buffer is 1024 bytes long, so if we get
 		 * here and AUDIT_BUFSIZ is at least 1024, then we can
 		 * log everything that printk could have logged. */
-		audit_log_move(ab);
-		avail = sizeof(ab->tmp) - ab->len;
-		len   = vsnprintf(ab->tmp + ab->len, avail, fmt, args);
+		avail = audit_expand(ab, max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail));
+		if (!avail)
+			goto out;
+		len = vsnprintf(skb->tail, avail, fmt, args2);
 	}
-	ab->len   += (len < avail) ? len : avail;
-	ab->total += (len < avail) ? len : avail;
+	if (len > 0)
+		skb_put(skb, len);
+out:
+	return;
 }
 
 /* Format a message into the audit buffer.  All the work is done in
···
 	va_end(args);
 }
 
-void audit_log_hex(struct audit_buffer *ab, const unsigned char *buf, size_t len)
+/* This function will take the passed buf and convert it into a string of
+ * ascii hex digits. The new string is placed onto the skb. */
+void audit_log_hex(struct audit_buffer *ab, const unsigned char *buf, 
+		size_t len)
 {
-	int i;
+	int i, avail, new_len;
+	unsigned char *ptr;
+	struct sk_buff *skb;
+	static const unsigned char *hex = "0123456789ABCDEF";
 
-	for (i=0; i<len; i++)
-		audit_log_format(ab, "%02x", buf[i]);
+	BUG_ON(!ab->skb);
+	skb = ab->skb;
+	avail = skb_tailroom(skb);
+	new_len = len<<1;
+	if (new_len >= avail) {
+		/* Round the buffer request up to the next multiple */
+		new_len = AUDIT_BUFSIZ*(((new_len-avail)/AUDIT_BUFSIZ) + 1);
+		avail = audit_expand(ab, new_len);
+		if (!avail)
+			return;
+	}
+
+	ptr = skb->tail;
+	for (i=0; i<len; i++) {
+		*ptr++ = hex[(buf[i] & 0xF0)>>4]; /* Upper nibble */
+		*ptr++ = hex[buf[i] & 0x0F];	  /* Lower nibble */
+	}
+	*ptr = 0;
+	skb_put(skb, len << 1); /* new string is twice the old string */
 }
 
+/* This code will escape a string that is passed to it if the string
+ * contains a control character, unprintable character, double quote mark, 
+ * or a space. Unescaped strings will start and end with a double quote mark.
+ * Strings that are escaped are printed in hex (2 digits per char). */
 void audit_log_untrustedstring(struct audit_buffer *ab, const char *string)
 {
 	const unsigned char *p = string;
 
 	while (*p) {
-		if (*p == '"' || *p == ' ' || *p < 0x20 || *p > 0x7f) {
+		if (*p == '"' || *p < 0x21 || *p > 0x7f) {
 			audit_log_hex(ab, string, strlen(string));
 			return;
 		}
···
 	audit_log_format(ab, "\"%s\"", string);
 }
 
-
-/* This is a helper-function to print the d_path without using a static
- * buffer or allocating another buffer in addition to the one in
- * audit_buffer. */
+/* This is a helper-function to print the escaped d_path */
 void audit_log_d_path(struct audit_buffer *ab, const char *prefix,
 		      struct dentry *dentry, struct vfsmount *vfsmnt)
 {
-	char *p;
-	int  len, avail;
+	char *p, *path;
 
-	if (prefix) audit_log_format(ab, " %s", prefix);
+	if (prefix)
+		audit_log_format(ab, " %s", prefix);
 
-	if (ab->len > 128)
-		audit_log_move(ab);
-	avail = sizeof(ab->tmp) - ab->len;
-	p = d_path(dentry, vfsmnt, ab->tmp + ab->len, avail);
-	if (IS_ERR(p)) {
+	/* We will allow 11 spaces for ' (deleted)' to be appended */
+	path = kmalloc(PATH_MAX+11, GFP_KERNEL);
+	if (!path) {
+		audit_log_format(ab, "<no memory>");
+		return;
+	}
+	p = d_path(dentry, vfsmnt, path, PATH_MAX+11);
+	if (IS_ERR(p)) { /* Should never happen since we send PATH_MAX */
 		/* FIXME: can we save some information here? */
-		audit_log_format(ab, "<toolong>");
-	} else {
-				/* path isn't at start of buffer */
-		len	   = (ab->tmp + sizeof(ab->tmp) - 1) - p;
-		memmove(ab->tmp + ab->len, p, len);
-		ab->len   += len;
-		ab->total += len;
-	}
+		audit_log_format(ab, "<too long>");
+	} else 
+		audit_log_untrustedstring(ab, p);
+	kfree(path);
 }
-
-/* Remove queued messages from the audit_txlist and send them to userspace. */
-static void audit_tasklet_handler(unsigned long arg)
-{
-	LIST_HEAD(list);
-	struct audit_buffer *ab;
-	unsigned long	    flags;
-
-	spin_lock_irqsave(&audit_txlist_lock, flags);
-	list_splice_init(&audit_txlist, &list);
-	spin_unlock_irqrestore(&audit_txlist_lock, flags);
-
-	while (!list_empty(&list)) {
-		ab = list_entry(list.next, struct audit_buffer, list);
-		list_del(&ab->list);
-		audit_log_end_fast(ab);
-	}
-}
-
-static DECLARE_TASKLET(audit_tasklet, audit_tasklet_handler, 0);
 
 /* The netlink_* functions cannot be called inside an irq context, so
  * the audit buffer is places on a queue and a tasklet is scheduled to
  * remove them from the queue outside the irq context.  May be called in
  * any context. */
-static void audit_log_end_irq(struct audit_buffer *ab)
+void audit_log_end(struct audit_buffer *ab)
 {
-	unsigned long flags;
-
-	if (!ab)
-		return;
-	spin_lock_irqsave(&audit_txlist_lock, flags);
-	list_add_tail(&ab->list, &audit_txlist);
-	spin_unlock_irqrestore(&audit_txlist_lock, flags);
-
-	tasklet_schedule(&audit_tasklet);
-}
-
-/* Send the message in the audit buffer directly to user space.  May not
- * be called in an irq context. */
-static void audit_log_end_fast(struct audit_buffer *ab)
-{
-	unsigned long flags;
-
-	BUG_ON(in_irq());
 	if (!ab)
 		return;
 	if (!audit_rate_check()) {
 		audit_log_lost("rate limit exceeded");
 	} else {
-		audit_log_move(ab);
-		if (audit_log_drain(ab))
-			return;
+		if (audit_pid) {
+			struct nlmsghdr *nlh = (struct nlmsghdr *)ab->skb->data;
+			nlh->nlmsg_len = ab->skb->len - NLMSG_SPACE(0);
+			skb_queue_tail(&audit_skb_queue, ab->skb);
+			ab->skb = NULL;
+			wake_up_interruptible(&kauditd_wait);
+		} else {
+			printk("%s\n", ab->skb->data + NLMSG_SPACE(0));
+		}
 	}
-
-	atomic_dec(&audit_backlog);
-	spin_lock_irqsave(&audit_freelist_lock, flags);
-	if (++audit_freelist_count > AUDIT_MAXFREE)
-		kfree(ab);
-	else
-		list_add(&ab->list, &audit_freelist);
-	spin_unlock_irqrestore(&audit_freelist_lock, flags);
-}
-
-/* Send or queue the message in the audit buffer, depending on the
- * current context.  (A convenience function that may be called in any
- * context.) */
-void audit_log_end(struct audit_buffer *ab)
-{
-	if (in_irq())
-		audit_log_end_irq(ab);
-	else
-		audit_log_end_fast(ab);
+	audit_buffer_free(ab);
 }
 
 /* Log an audit record.  This is a convenience function that calls
  * audit_log_start, audit_log_vformat, and audit_log_end.  It may be
  * called in any context. */
-void audit_log(struct audit_context *ctx, const char *fmt, ...)
+void audit_log(struct audit_context *ctx, int type, const char *fmt, ...)
 {
 	struct audit_buffer *ab;
 	va_list args;
 
-	ab = audit_log_start(ctx);
+	ab = audit_log_start(ctx, type);
 	if (ab) {
 		va_start(args, fmt);
 		audit_log_vformat(ab, fmt, args);

kernel/auditsc.c

···
 #include <asm/types.h>
 #include <linux/mm.h>
 #include <linux/module.h>
-
+#include <linux/mount.h>
+#include <linux/socket.h>
 #include <linux/audit.h>
 #include <linux/personality.h>
 #include <linux/time.h>
···
 	mode_t			mode;
 };
 
+struct audit_aux_data_socketcall {
+	struct audit_aux_data	d;
+	int			nargs;
+	unsigned long		args[0];
+};
+
+struct audit_aux_data_sockaddr {
+	struct audit_aux_data	d;
+	int			len;
+	char			a[0];
+};
+
+struct audit_aux_data_path {
+	struct audit_aux_data	d;
+	struct dentry		*dentry;
+	struct vfsmount		*mnt;
+};
 
 /* The per-task audit context. */
 struct audit_context {
···
 	int		    auditable;  /* 1 if record should be written */
 	int		    name_count;
 	struct audit_names  names[AUDIT_NAMES];
+	struct dentry *	    pwd;
+	struct vfsmount *   pwdmnt;
 	struct audit_context *previous; /* For nested syscalls */
 	struct audit_aux_data *aux;
 
···
 	struct rcu_head   rcu;
 	struct audit_rule rule;
 };
+
+extern int audit_pid;
 
 /* Check to see if two rules are identical.  It is called from
  * audit_del_rule during AUDIT_DEL. */
···
 	return -EFAULT;		/* No matching rule */
 }
 
-#ifdef CONFIG_NET
 /* Copy rule from user-space to kernel-space.  Called during
  * AUDIT_ADD. */
 static int audit_copy_rule(struct audit_rule *d, struct audit_rule *s)
···
 			err = audit_add_rule(entry, &audit_entlist);
 		if (!err && (flags & AUDIT_AT_EXIT))
 			err = audit_add_rule(entry, &audit_extlist);
-		audit_log(NULL, "auid %u added an audit rule\n", loginuid);
+		audit_log(NULL, AUDIT_CONFIG_CHANGE, 
+				"auid=%u added an audit rule\n", loginuid);
 		break;
 	case AUDIT_DEL:
 		flags =((struct audit_rule *)data)->flags;
···
 			err = audit_del_rule(data, &audit_entlist);
 		if (!err && (flags & AUDIT_AT_EXIT))
 			err = audit_del_rule(data, &audit_extlist);
-		audit_log(NULL, "auid %u removed an audit rule\n", loginuid);
+		audit_log(NULL, AUDIT_CONFIG_CHANGE,
+				"auid=%u removed an audit rule\n", loginuid);
 		break;
 	default:
 		return -EINVAL;
···
 
 	return err;
 }
-#endif
 
 /* Compare a task_struct with an audit_rule.  Return 1 on match, 0
  * otherwise. */
···
 
 /* At syscall entry and exit time, this filter is called if the
  * audit_state is not low enough that auditing cannot take place, but is
- * also not high enough that we already know we have to write and audit
+ * also not high enough that we already know we have to write an audit
  * record (i.e., the state is AUDIT_SETUP_CONTEXT or  AUDIT_BUILD_CONTEXT).
  */
 static enum audit_state audit_filter_syscall(struct task_struct *tsk,
···
 		if (context->names[i].name)
 			__putname(context->names[i].name);
 	context->name_count = 0;
+	if (context->pwd)
+		dput(context->pwd);
+	if (context->pwdmnt)
+		mntput(context->pwdmnt);
+	context->pwd = NULL;
+	context->pwdmnt = NULL;
 }
 
 static inline void audit_free_aux(struct audit_context *context)
···
 	struct audit_aux_data *aux;
 
 	while ((aux = context->aux)) {
+		if (aux->type == AUDIT_AVC_PATH) {
+			struct audit_aux_data_path *axi = (void *)aux;
+			dput(axi->dentry);
+			mntput(axi->mnt);
+		}
 		context->aux = aux->next;
 		kfree(aux);
 	}
···
 	struct vm_area_struct *vma;
 
 	get_task_comm(name, current);
-	audit_log_format(ab, " comm=%s", name);
+	audit_log_format(ab, " comm=");
+	audit_log_untrustedstring(ab, name);
 
 	if (!mm)
 		return;
···
 {
 	int i;
 	struct audit_buffer *ab;
+	struct audit_aux_data *aux;
 
-	ab = audit_log_start(context);
+	ab = audit_log_start(context, AUDIT_SYSCALL);
 	if (!ab)
 		return;		/* audit_panic has been called */
-	audit_log_format(ab, "syscall=%d", context->major);
+	audit_log_format(ab, "arch=%x syscall=%d",
+			 context->arch, context->major);
 	if (context->personality != PER_LINUX)
 		audit_log_format(ab, " per=%lx", context->personality);
-	audit_log_format(ab, " arch=%x", context->arch);
 	if (context->return_valid)
 		audit_log_format(ab, " success=%s exit=%ld", 
 				 (context->return_valid==AUDITSC_SUCCESS)?"yes":"no",
 				 context->return_code);
 	audit_log_format(ab,
 		  " a0=%lx a1=%lx a2=%lx a3=%lx items=%d"
-		  " pid=%d loginuid=%d uid=%d gid=%d"
-		  " euid=%d suid=%d fsuid=%d"
-		  " egid=%d sgid=%d fsgid=%d",
+		  " pid=%d auid=%u uid=%u gid=%u"
+		  " euid=%u suid=%u fsuid=%u"
+		  " egid=%u sgid=%u fsgid=%u",
 		  context->argv[0],
 		  context->argv[1],
 		  context->argv[2],
···
 		  context->egid, context->sgid, context->fsgid);
 	audit_log_task_info(ab);
 	audit_log_end(ab);
-	while (context->aux) {
-		struct audit_aux_data *aux;
 
-		ab = audit_log_start(context);
+	for (aux = context->aux; aux; aux = aux->next) {
+
+		ab = audit_log_start(context, aux->type);
 		if (!ab)
 			continue; /* audit_panic has been called */
 
-		aux = context->aux;
-		context->aux = aux->next;
-
-		audit_log_format(ab, "auxitem=%d", aux->type);
 		switch (aux->type) {
-		case AUDIT_AUX_IPCPERM: {
+		case AUDIT_IPC: {
 			struct audit_aux_data_ipcctl *axi = (void *)aux;
 			audit_log_format(ab, 
-					 " qbytes=%lx uid=%d gid=%d mode=%x",
+					 " qbytes=%lx iuid=%u igid=%u mode=%x",
 					 axi->qbytes, axi->uid, axi->gid, axi->mode);
-			}
+			break; }
+
+		case AUDIT_SOCKETCALL: {
+			int i;
+			struct audit_aux_data_socketcall *axs = (void *)aux;
+			audit_log_format(ab, "nargs=%d", axs->nargs);
+			for (i=0; i<axs->nargs; i++)
+				audit_log_format(ab, " a%d=%lx", i, axs->args[i]);
+			break; }
+
+		case AUDIT_SOCKADDR: {
+			struct audit_aux_data_sockaddr *axs = (void *)aux;
+
+			audit_log_format(ab, "saddr=");
+			audit_log_hex(ab, axs->a, axs->len);
+			break; }
+
+		case AUDIT_AVC_PATH: {
+			struct audit_aux_data_path *axi = (void *)aux;
+			audit_log_d_path(ab, "path=", axi->dentry, axi->mnt);
+			break; }
+
 		}
 		audit_log_end(ab);
-		kfree(aux);
 	}
 
+	if (context->pwd && context->pwdmnt) {
+		ab = audit_log_start(context, AUDIT_CWD);
+		if (ab) {
+			audit_log_d_path(ab, "cwd=", context->pwd, context->pwdmnt);
+			audit_log_end(ab);
+		}
+	}
 	for (i = 0; i < context->name_count; i++) {
-		ab = audit_log_start(context);
+		ab = audit_log_start(context, AUDIT_PATH);
 		if (!ab)
 			continue; /* audit_panic has been called */
+
 		audit_log_format(ab, "item=%d", i);
 		if (context->names[i].name) {
 			audit_log_format(ab, " name=");
···
 		}
 		if (context->names[i].ino != (unsigned long)-1)
 			audit_log_format(ab, " inode=%lu dev=%02x:%02x mode=%#o"
-					     " uid=%d gid=%d rdev=%02x:%02x",
+					     " ouid=%u ogid=%u rdev=%02x:%02x",
 					 context->names[i].ino,
 					 MAJOR(context->names[i].dev),
 					 MINOR(context->names[i].dev),
···
 
 	/* Check for system calls that do not go through the exit
 	 * function (e.g., exit_group), then free context block. */
-	if (context->in_syscall && context->auditable)
+	if (context->in_syscall && context->auditable && context->pid != audit_pid)
 		audit_log_exit(context);
 
 	audit_free_context(context);
-}
-
-/* Compute a serial number for the audit record.  Audit records are
- * written to user-space as soon as they are generated, so a complete
- * audit record may be written in several pieces.  The timestamp of the
- * record and this serial number are used by the user-space daemon to
- * determine which pieces belong to the same audit record.  The
- * (timestamp,serial) tuple is unique for each syscall and is live from
- * syscall entry to syscall exit.
- *
- * Atomic values are only guaranteed to be 24-bit, so we count down.
- *
- * NOTE: Another possibility is to store the formatted records off the
- * audit context (for those records that have a context), and emit them
- * all at syscall exit.  However, this could delay the reporting of
- * significant errors until syscall exit (or never, if the system
- * halts). */
-static inline unsigned int audit_serial(void)
-{
-	static atomic_t serial = ATOMIC_INIT(0xffffff);
-	unsigned int a, b;
-
-	do {
-		a = atomic_read(&serial);
-		if (atomic_dec_and_test(&serial))
-			atomic_set(&serial, 0xffffff);
-		b = atomic_read(&serial);
-	} while (b != a - 1);
-
-	return 0xffffff - b;
 }
 
 /* Fill in audit context at syscall entry.  This only happens if the
···
 	if (likely(!context))
 		return;
 
-	if (context->in_syscall && context->auditable)
+	if (context->in_syscall && context->auditable && context->pid != audit_pid)
 		audit_log_exit(context);
 
 	context->in_syscall = 0;
···
 	context->names[context->name_count].name = name;
 	context->names[context->name_count].ino  = (unsigned long)-1;
 	++context->name_count;
+	if (!context->pwd) {
+		read_lock(&current->fs->lock);
+		context->pwd = dget(current->fs->pwd);
+		context->pwdmnt = mntget(current->fs->pwdmnt);
+		read_unlock(&current->fs->lock);
+	}
+		
 }
 
 /* Intercept a putname request.  Called from
···
 	context->names[idx].rdev = inode->i_rdev;
 }
 
-void audit_get_stamp(struct audit_context *ctx,
-		     struct timespec *t, unsigned int *serial)
+void auditsc_get_stamp(struct audit_context *ctx,
+		       struct timespec *t, unsigned int *serial)
 {
-	if (ctx) {
-		t->tv_sec  = ctx->ctime.tv_sec;
-		t->tv_nsec = ctx->ctime.tv_nsec;
-		*serial    = ctx->serial;
-		ctx->auditable = 1;
-	} else {
-		*t      = CURRENT_TIME;
-		*serial = 0;
-	}
+	t->tv_sec  = ctx->ctime.tv_sec;
+	t->tv_nsec = ctx->ctime.tv_nsec;
+	*serial    = ctx->serial;
+	ctx->auditable = 1;
 }
-
-extern int audit_set_type(struct audit_buffer *ab, int type);
 
 int audit_set_loginuid(struct task_struct *task, uid_t loginuid)
 {
 	if (task->audit_context) {
 		struct audit_buffer *ab;
 
-		ab = audit_log_start(NULL);
+		ab = audit_log_start(NULL, AUDIT_LOGIN);
 		if (ab) {
 			audit_log_format(ab, "login pid=%d uid=%u "
-				"old loginuid=%u new loginuid=%u",
+				"old auid=%u new auid=%u",
 				task->pid, task->uid, 
 				task->audit_context->loginuid, loginuid);
-			audit_set_type(ab, AUDIT_LOGIN);
 			audit_log_end(ab);
 		}
 		task->audit_context->loginuid = loginuid;
···
 	ax->gid = gid;
 	ax->mode = mode;
 
-	ax->d.type = AUDIT_AUX_IPCPERM;
+	ax->d.type = AUDIT_IPC;
 	ax->d.next = context->aux;
 	context->aux = (void *)ax;
 	return 0;
 }
+
+int audit_socketcall(int nargs, unsigned long *args)
+{
+	struct audit_aux_data_socketcall *ax;
+	struct audit_context *context = current->audit_context;
+
+	if (likely(!context))
+		return 0;
+
+	ax = kmalloc(sizeof(*ax) + nargs * sizeof(unsigned long), GFP_KERNEL);
+	if (!ax)
+		return -ENOMEM;
+
+	ax->nargs = nargs;
+	memcpy(ax->args, args, nargs * sizeof(unsigned long));
+
+	ax->d.type = AUDIT_SOCKETCALL;
+	ax->d.next = context->aux;
+	context->aux = (void *)ax;
+	return 0;
+}
+
+int audit_sockaddr(int len, void *a)
+{
+	struct audit_aux_data_sockaddr *ax;
+	struct audit_context *context = current->audit_context;
+
+	if (likely(!context))
+		return 0;
+
+	ax = kmalloc(sizeof(*ax) + len, GFP_KERNEL);
+	if (!ax)
+		return -ENOMEM;
+
+	ax->len = len;
+	memcpy(ax->a, a, len);
+
+	ax->d.type = AUDIT_SOCKADDR;
+	ax->d.next = context->aux;
+	context->aux = (void *)ax;
+	return 0;
+}
+
+int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt)
+{
+	struct audit_aux_data_path *ax;
+	struct audit_context *context = current->audit_context;
+
+	if (likely(!context))
+		return 0;
+
+	ax = kmalloc(sizeof(*ax), GFP_ATOMIC);
+	if (!ax)
+		return -ENOMEM;
+
+	ax->dentry = dget(dentry);
+	ax->mnt = mntget(mnt);
+
+	ax->d.type = AUDIT_AVC_PATH;
+	ax->d.next = context->aux;
+	context->aux = (void *)ax;
+	return 0;
+}
+
+void audit_signal_info(int sig, struct task_struct *t)
+{
+	extern pid_t audit_sig_pid;
+	extern uid_t audit_sig_uid;
+
+	if (unlikely(audit_pid && t->pid == audit_pid)) {
+		if (sig == SIGTERM || sig == SIGHUP) {
+			struct audit_context *ctx = current->audit_context;
+			audit_sig_pid = current->pid;
+			if (ctx)
+				audit_sig_uid = ctx->loginuid;
+			else
+				audit_sig_uid = current->uid;
+		}
+	}
+}
+

kernel/signal.c

···
 #include <linux/ptrace.h>
 #include <linux/posix-timers.h>
 #include <linux/signal.h>
+#include <linux/audit.h>
 #include <asm/param.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
···
 	    && (current->uid ^ t->suid) && (current->uid ^ t->uid)
 	    && !capable(CAP_KILL))
 		return error;
-	return security_task_kill(t, info, sig);
+
+	error = security_task_kill(t, info, sig);
+	if (!error)
+		audit_signal_info(sig, t); /* Let audit system see the signal */
+	return error;
 }
 
 /* forward decl */

net/socket.c

···
 #include <linux/syscalls.h>
 #include <linux/compat.h>
 #include <linux/kmod.h>
+#include <linux/audit.h>
 
 #ifdef CONFIG_NET_RADIO
 #include <linux/wireless.h>		/* Note : will define WIRELESS_EXT */
···
 		return 0;
 	if(copy_from_user(kaddr,uaddr,ulen))
 		return -EFAULT;
-	return 0;
+	return audit_sockaddr(ulen, kaddr);
 }
 
 /**
···
 	/* copy_from_user should be SMP safe. */
 	if (copy_from_user(a, args, nargs[call]))
 		return -EFAULT;
-		
+
+	err = audit_socketcall(nargs[call]/sizeof(unsigned long), a);
+	if (err)
+		return err;
+
 	a0=a[0];
 	a1=a[1];
 	

security/selinux/avc.c

···
 	avc_node_cachep = kmem_cache_create("avc_node", sizeof(struct avc_node),
 					     0, SLAB_PANIC, NULL, NULL);
 
-	audit_log(current->audit_context, "AVC INITIALIZED\n");
+	audit_log(current->audit_context, AUDIT_KERNEL, "AVC INITIALIZED\n");
 }
 
 int avc_get_hash_stats(char *page)
···
                u16 tclass, u32 requested,
                struct av_decision *avd, int result, struct avc_audit_data *a)
 {
+	struct task_struct *tsk = current;
 	struct inode *inode = NULL;
 	u32 denied, audited;
 	struct audit_buffer *ab;
···
 			return;
 	}
 
-	ab = audit_log_start(current->audit_context);
+	ab = audit_log_start(current->audit_context, AUDIT_AVC);
 	if (!ab)
 		return;		/* audit_panic has been called */
 	audit_log_format(ab, "avc:  %s ", denied ? "denied" : "granted");
 	avc_dump_av(ab, tclass,audited);
 	audit_log_format(ab, " for ");
+	if (a && a->tsk)
+		tsk = a->tsk;
+	if (tsk && tsk->pid) {
+		audit_log_format(ab, " pid=%d comm=", tsk->pid);
+		audit_log_untrustedstring(ab, tsk->comm);
+	}
 	if (a) {
 		switch (a->type) {
 		case AVC_AUDIT_DATA_IPC:
···
 		case AVC_AUDIT_DATA_FS:
 			if (a->u.fs.dentry) {
 				struct dentry *dentry = a->u.fs.dentry;
-				if (a->u.fs.mnt) {
-					audit_log_d_path(ab, "path=", dentry,
-							a->u.fs.mnt);
-				} else {
-					audit_log_format(ab, " name=%s",
-							 dentry->d_name.name);
-				}
+				if (a->u.fs.mnt)
+					audit_avc_path(dentry, a->u.fs.mnt);
+				audit_log_format(ab, " name=");
+				audit_log_untrustedstring(ab, dentry->d_name.name);
 				inode = dentry->d_inode;
 			} else if (a->u.fs.inode) {
 				struct dentry *dentry;
 				inode = a->u.fs.inode;
 				dentry = d_find_alias(inode);
 				if (dentry) {
-					audit_log_format(ab, " name=%s",
-							 dentry->d_name.name);
+					audit_log_format(ab, " name=");
+					audit_log_untrustedstring(ab, dentry->d_name.name);
 					dput(dentry);
 				}
 			}
···
 				case AF_UNIX:
 					u = unix_sk(sk);
 					if (u->dentry) {
-						audit_log_d_path(ab, "path=",
-							u->dentry, u->mnt);
+						audit_avc_path(u->dentry, u->mnt);
+						audit_log_format(ab, " name=");
+						audit_log_untrustedstring(ab, u->dentry->d_name.name);
 						break;
 					}
 					if (!u->addr)
 						break;
 					len = u->addr->len-sizeof(short);
 					p = &u->addr->name->sun_path[0];
+					audit_log_format(ab, " path=");
 					if (*p)
-						audit_log_format(ab,
-							"path=%*.*s", len,
-							len, p);
+						audit_log_untrustedstring(ab, p);
 					else
-						audit_log_format(ab,
-							"path=@%*.*s", len-1,
-							len-1, p+1);
+						audit_log_hex(ab, p, len);
 					break;
 				}
 			}

security/selinux/hooks.c

···
 	err = selinux_nlmsg_lookup(isec->sclass, nlh->nlmsg_type, &perm);
 	if (err) {
 		if (err == -EINVAL) {
-			audit_log(current->audit_context,
+			audit_log(current->audit_context, AUDIT_SELINUX_ERR,
 				  "SELinux:  unrecognized netlink message"
 				  " type=%hu for sclass=%hu\n",
 				  nlh->nlmsg_type, isec->sclass);

security/selinux/nlmsgtab.c

···
 	{ AUDIT_ADD,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_DEL,		NETLINK_AUDIT_SOCKET__NLMSG_WRITE    },
 	{ AUDIT_USER,		NETLINK_AUDIT_SOCKET__NLMSG_RELAY    },
+	{ AUDIT_SIGNAL_INFO,	NETLINK_AUDIT_SOCKET__NLMSG_READ     },
 };
 
 
···
 		break;
 
 	case SECCLASS_NETLINK_AUDIT_SOCKET:
-		err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
-				 sizeof(nlmsg_audit_perms));
+		if (nlmsg_type >= AUDIT_FIRST_USER_MSG &&
+		    nlmsg_type <= AUDIT_LAST_USER_MSG) {
+			*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
+		} else {
+			err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
+					 sizeof(nlmsg_audit_perms));
+		}
 		break;
 
 	/* No messaging from userspace, or class unknown/unhandled */

security/selinux/ss/services.c

···
 		goto out;
 	if (context_struct_to_string(tcontext, &t, &tlen) < 0)
 		goto out;
-	audit_log(current->audit_context,
+	audit_log(current->audit_context, AUDIT_SELINUX_ERR,
 	          "security_validate_transition:  denied for"
 	          " oldcontext=%s newcontext=%s taskcontext=%s tclass=%s",
 	          o, n, t, policydb.p_class_val_to_name[tclass-1]);
···
 		goto out;
 	if (context_struct_to_string(newcontext, &n, &nlen) < 0)
 		goto out;
-	audit_log(current->audit_context,
+	audit_log(current->audit_context, AUDIT_SELINUX_ERR,
 		  "security_compute_sid:  invalid context %s"
 		  " for scontext=%s"
 		  " tcontext=%s"