Merge branch 'audit.b38' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current

* 'audit.b38' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit-current:
  [PATCH] Abnormal End of Processes
  [PATCH] match audit name data
  [PATCH] complete message queue auditing
  [PATCH] audit inode for all xattr syscalls
  [PATCH] initialize name osid
  [PATCH] audit signal recipients
  [PATCH] add SIGNAL syscall class (v3)
  [PATCH] auditing ptrace

arch/ia64/ia32/audit.c

@@ -20,6 +20,11 @@ unsigned ia32_read_class[] = {
 ~0U
 };
 
+unsigned ia32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
 int ia32_classify_syscall(unsigned syscall)
 {
 	switch(syscall) {

arch/ia64/kernel/audit.c

@@ -23,6 +23,20 @@ static unsigned chattr_class[] = {
 ~0U
 };
 
+static unsigned signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_IA32_SUPPORT
+	if (arch == AUDIT_ARCH_I386)
+		return 1;
+#endif
+	return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_IA32_SUPPORT
@@ -49,15 +63,18 @@ static int __init audit_classes_init(void)
 	extern __u32 ia32_write_class[];
 	extern __u32 ia32_read_class[];
 	extern __u32 ia32_chattr_class[];
+	extern __u32 ia32_signal_class[];
 	audit_register_class(AUDIT_CLASS_WRITE_32, ia32_write_class);
 	audit_register_class(AUDIT_CLASS_READ_32, ia32_read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE_32, ia32_dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR_32, ia32_chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL_32, ia32_signal_class);
 #endif
 	audit_register_class(AUDIT_CLASS_WRITE, write_class);
 	audit_register_class(AUDIT_CLASS_READ, read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
 	return 0;
 }
 

arch/powerpc/kernel/audit.c

@@ -23,6 +23,20 @@ static unsigned chattr_class[] = {
 ~0U
 };
 
+static unsigned signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_PPC64
+	if (arch == AUDIT_ARCH_PPC)
+		return 1;
+#endif
+	return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_PPC64
@@ -51,15 +65,18 @@ static int __init audit_classes_init(void)
 	extern __u32 ppc32_write_class[];
 	extern __u32 ppc32_read_class[];
 	extern __u32 ppc32_chattr_class[];
+	extern __u32 ppc32_signal_class[];
 	audit_register_class(AUDIT_CLASS_WRITE_32, ppc32_write_class);
 	audit_register_class(AUDIT_CLASS_READ_32, ppc32_read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE_32, ppc32_dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR_32, ppc32_chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL_32, ppc32_signal_class);
 #endif
 	audit_register_class(AUDIT_CLASS_WRITE, write_class);
 	audit_register_class(AUDIT_CLASS_READ, read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
 	return 0;
 }
 

arch/powerpc/kernel/compat_audit.c

@@ -21,6 +21,11 @@ unsigned ppc32_read_class[] = {
 ~0U
 };
 
+unsigned ppc32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
 int ppc32_classify_syscall(unsigned syscall)
 {
 	switch(syscall) {

arch/s390/kernel/audit.c

@@ -23,6 +23,20 @@ static unsigned chattr_class[] = {
 ~0U
 };
 
+static unsigned signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_COMPAT
+	if (arch == AUDIT_ARCH_S390)
+		return 1;
+#endif
+	return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_COMPAT
@@ -51,15 +65,18 @@ static int __init audit_classes_init(void)
 	extern __u32 s390_write_class[];
 	extern __u32 s390_read_class[];
 	extern __u32 s390_chattr_class[];
+	extern __u32 s390_signal_class[];
 	audit_register_class(AUDIT_CLASS_WRITE_32, s390_write_class);
 	audit_register_class(AUDIT_CLASS_READ_32, s390_read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE_32, s390_dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR_32, s390_chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL_32, s390_signal_class);
 #endif
 	audit_register_class(AUDIT_CLASS_WRITE, write_class);
 	audit_register_class(AUDIT_CLASS_READ, read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
 	return 0;
 }
 

arch/s390/kernel/compat_audit.c

@@ -21,6 +21,11 @@ unsigned s390_read_class[] = {
 ~0U
 };
 
+unsigned s390_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
 int s390_classify_syscall(unsigned syscall)
 {
 	switch(syscall) {

arch/sparc64/kernel/audit.c

@@ -23,6 +23,20 @@ static unsigned chattr_class[] = {
 ~0U
 };
 
+static unsigned signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_SPARC32_COMPAT
+	if (arch == AUDIT_ARCH_SPARC)
+		return 1;
+#endif
+	return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_SPARC32_COMPAT
@@ -51,15 +65,18 @@ static int __init audit_classes_init(void)
 	extern __u32 sparc32_write_class[];
 	extern __u32 sparc32_read_class[];
 	extern __u32 sparc32_chattr_class[];
+	extern __u32 sparc32_signal_class[];
 	audit_register_class(AUDIT_CLASS_WRITE_32, sparc32_write_class);
 	audit_register_class(AUDIT_CLASS_READ_32, sparc32_read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE_32, sparc32_dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR_32, sparc32_chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL_32, sparc32_signal_class);
 #endif
 	audit_register_class(AUDIT_CLASS_WRITE, write_class);
 	audit_register_class(AUDIT_CLASS_READ, read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
 	return 0;
 }
 

arch/sparc64/kernel/compat_audit.c

@@ -20,6 +20,11 @@ unsigned sparc32_read_class[] = {
 ~0U
 };
 
+unsigned sparc32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
 int sparc32_classify_syscall(unsigned syscall)
 {
 	switch(syscall) {

arch/x86_64/ia32/audit.c

@@ -20,6 +20,11 @@ unsigned ia32_read_class[] = {
 ~0U
 };
 
+unsigned ia32_signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
 int ia32_classify_syscall(unsigned syscall)
 {
 	switch(syscall) {

arch/x86_64/kernel/audit.c

@@ -23,6 +23,20 @@ static unsigned chattr_class[] = {
 ~0U
 };
 
+static unsigned signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int audit_classify_arch(int arch)
+{
+#ifdef CONFIG_IA32_EMULATION
+	if (arch == AUDIT_ARCH_I386)
+		return 1;
+#endif
+	return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 #ifdef CONFIG_IA32_EMULATION
@@ -49,15 +63,18 @@ static int __init audit_classes_init(void)
 	extern __u32 ia32_write_class[];
 	extern __u32 ia32_read_class[];
 	extern __u32 ia32_chattr_class[];
+	extern __u32 ia32_signal_class[];
 	audit_register_class(AUDIT_CLASS_WRITE_32, ia32_write_class);
 	audit_register_class(AUDIT_CLASS_READ_32, ia32_read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE_32, ia32_dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR_32, ia32_chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL_32, ia32_signal_class);
 #endif
 	audit_register_class(AUDIT_CLASS_WRITE, write_class);
 	audit_register_class(AUDIT_CLASS_READ, read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
 	return 0;
 }
 

fs/exec.c

@@ -1495,6 +1495,8 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs)
 	int flag = 0;
 	int ispipe = 0;
 
+	audit_core_dumps(signr);
+
 	binfmt = current->binfmt;
 	if (!binfmt || !binfmt->core_dump)
 		goto fail;

fs/namei.c

@@ -1719,7 +1719,7 @@ do_last:
 	 * It already exists.
 	 */
 	mutex_unlock(&dir->d_inode->i_mutex);
-	audit_inode_update(path.dentry->d_inode);
+	audit_inode(pathname, path.dentry->d_inode);
 
 	error = -EEXIST;
 	if (flag & O_EXCL)

fs/xattr.c

@@ -350,6 +350,7 @@ sys_fgetxattr(int fd, char __user *name, void __user *value, size_t size)
 	f = fget(fd);
 	if (!f)
 		return error;
+	audit_inode(NULL, f->f_path.dentry->d_inode);
 	error = getxattr(f->f_path.dentry, name, value, size);
 	fput(f);
 	return error;
@@ -422,6 +423,7 @@ sys_flistxattr(int fd, char __user *list, size_t size)
 	f = fget(fd);
 	if (!f)
 		return error;
+	audit_inode(NULL, f->f_path.dentry->d_inode);
 	error = listxattr(f->f_path.dentry, list, size);
 	fput(f);
 	return error;

include/asm-generic/audit_signal.h

+__NR_kill,
+__NR_tgkill,
+__NR_tkill,

include/linux/audit.h

@@ -91,6 +91,7 @@
 #define AUDIT_MQ_GETSETATTR	1315	/* POSIX MQ get/set attribute record type */
 #define AUDIT_KERNEL_OTHER	1316	/* For use by 3rd party modules */
 #define AUDIT_FD_PAIR		1317    /* audit record for pipe/socketpair */
+#define AUDIT_OBJ_PID		1318	/* ptrace target */
 
 #define AUDIT_AVC		1400	/* SE Linux avc denial or grant */
 #define AUDIT_SELINUX_ERR	1401	/* Internal SE Linux Errors */
@@ -111,6 +112,7 @@
 #define AUDIT_FIRST_KERN_ANOM_MSG   1700
 #define AUDIT_LAST_KERN_ANOM_MSG    1799
 #define AUDIT_ANOM_PROMISCUOUS      1700 /* Device changed promiscuous mode */
+#define AUDIT_ANOM_ABEND            1701 /* Process ended abnormally */
 
 #define AUDIT_KERNEL		2000	/* Asynchronous audit record. NOT A REQUEST. */
 
@@ -148,6 +150,8 @@
 #define AUDIT_CLASS_READ_32 5
 #define AUDIT_CLASS_WRITE 6
 #define AUDIT_CLASS_WRITE_32 7
+#define AUDIT_CLASS_SIGNAL 8
+#define AUDIT_CLASS_SIGNAL_32 9
 
 /* This bitmask is used to validate user input.  It represents all bits that
  * are currently used in an audit field constant understood by the kernel.
@@ -337,6 +341,7 @@ struct mqstat;
 #define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
 extern int __init audit_register_class(int class, unsigned *list);
 extern int audit_classify_syscall(int abi, unsigned syscall);
+extern int audit_classify_arch(int arch);
 #ifdef CONFIG_AUDITSYSCALL
 /* These are defined in auditsc.c */
 				/* Public API */
@@ -351,7 +356,8 @@ extern void audit_putname(const char *name);
 extern void __audit_inode(const char *name, const struct inode *inode);
 extern void __audit_inode_child(const char *dname, const struct inode *inode,
 				const struct inode *parent);
-extern void __audit_inode_update(const struct inode *inode);
+extern void __audit_ptrace(struct task_struct *t);
+
 static inline int audit_dummy_context(void)
 {
 	void *p = current->audit_context;
@@ -372,9 +378,12 @@ static inline void audit_inode_child(const char *dname,
 	if (unlikely(!audit_dummy_context()))
 		__audit_inode_child(dname, inode, parent);
 }
-static inline void audit_inode_update(const struct inode *inode) {
+void audit_core_dumps(long signr);
+
+static inline void audit_ptrace(struct task_struct *t)
+{
 	if (unlikely(!audit_dummy_context()))
-		__audit_inode_update(inode);
+		__audit_ptrace(t);
 }
 
 				/* Private API (for audit.c only) */
@@ -447,6 +456,7 @@ static inline int audit_mq_getsetattr(mqd_t mqdes, struct mq_attr *mqstat)
 	return 0;
 }
 extern int audit_n_rules;
+extern int audit_signals;
 #else
 #define audit_alloc(t) ({ 0; })
 #define audit_free(t) do { ; } while (0)
@@ -457,10 +467,9 @@ extern int audit_n_rules;
 #define audit_putname(n) do { ; } while (0)
 #define __audit_inode(n,i) do { ; } while (0)
 #define __audit_inode_child(d,i,p) do { ; } while (0)
-#define __audit_inode_update(i) do { ; } while (0)
 #define audit_inode(n,i) do { ; } while (0)
 #define audit_inode_child(d,i,p) do { ; } while (0)
-#define audit_inode_update(i) do { ; } while (0)
+#define audit_core_dumps(i) do { ; } while (0)
 #define auditsc_get_stamp(c,t,s) do { BUG(); } while (0)
 #define audit_get_loginuid(c) ({ -1; })
 #define audit_log_task_context(b) do { ; } while (0)
@@ -477,7 +486,9 @@ extern int audit_n_rules;
 #define audit_mq_timedreceive(d,l,p,t) ({ 0; })
 #define audit_mq_notify(d,n) ({ 0; })
 #define audit_mq_getsetattr(d,s) ({ 0; })
+#define audit_ptrace(t) ((void)0)
 #define audit_n_rules 0
+#define audit_signals 0
 #endif
 
 #ifdef CONFIG_AUDIT

ipc/mqueue.c

@@ -681,6 +681,7 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 
 	if (oflag & O_CREAT) {
 		if (dentry->d_inode) {	/* entry already exists */
+			audit_inode(name, dentry->d_inode);
 			error = -EEXIST;
 			if (oflag & O_EXCL)
 				goto out;
@@ -693,6 +694,7 @@ asmlinkage long sys_mq_open(const char __user *u_name, int oflag, mode_t mode,
 		error = -ENOENT;
 		if (!dentry->d_inode)
 			goto out;
+		audit_inode(name, dentry->d_inode);
 		filp = do_open(dentry, oflag);
 	}
 
@@ -840,6 +842,7 @@ asmlinkage long sys_mq_timedsend(mqd_t mqdes, const char __user *u_msg_ptr,
 	if (unlikely(filp->f_op != &mqueue_file_operations))
 		goto out_fput;
 	info = MQUEUE_I(inode);
+	audit_inode(NULL, inode);
 
 	if (unlikely(!(filp->f_mode & FMODE_WRITE)))
 		goto out_fput;
@@ -923,6 +926,7 @@ asmlinkage ssize_t sys_mq_timedreceive(mqd_t mqdes, char __user *u_msg_ptr,
 	if (unlikely(filp->f_op != &mqueue_file_operations))
 		goto out_fput;
 	info = MQUEUE_I(inode);
+	audit_inode(NULL, inode);
 
 	if (unlikely(!(filp->f_mode & FMODE_READ)))
 		goto out_fput;

kernel/audit.h

@@ -83,6 +83,7 @@ struct audit_krule {
 	u32			field_count;
 	char			*filterkey; /* ties events to rules */
 	struct audit_field	*fields;
+	struct audit_field	*arch_f; /* quick access to arch field */
 	struct audit_field	*inode_f; /* quick access to an inode field */
 	struct audit_watch	*watch;	/* associated watch */
 	struct list_head	rlist;	/* entry in audit_watch.rules list */
@@ -131,17 +132,19 @@ extern void audit_handle_ievent(struct inotify_watch *, u32, u32, u32,
 extern int selinux_audit_rule_update(void);
 
 #ifdef CONFIG_AUDITSYSCALL
-extern void __audit_signal_info(int sig, struct task_struct *t);
-static inline void audit_signal_info(int sig, struct task_struct *t)
+extern int __audit_signal_info(int sig, struct task_struct *t);
+static inline int audit_signal_info(int sig, struct task_struct *t)
 {
-	if (unlikely(audit_pid && t->tgid == audit_pid))
-		__audit_signal_info(sig, t);
+	if (unlikely((audit_pid && t->tgid == audit_pid) ||
+		     (audit_signals && !audit_dummy_context())))
+		return __audit_signal_info(sig, t);
+	return 0;
 }
 extern enum audit_state audit_filter_inodes(struct task_struct *,
 					    struct audit_context *);
 extern void audit_set_auditable(struct audit_context *);
 #else
-#define audit_signal_info(s,t)
+#define audit_signal_info(s,t) AUDIT_DISABLED
 #define audit_filter_inodes(t,c) AUDIT_DISABLED
 #define audit_set_auditable(c)
 #endif

kernel/auditfilter.c

@@ -311,6 +311,43 @@ int audit_match_class(int class, unsigned syscall)
 	return classes[class][AUDIT_WORD(syscall)] & AUDIT_BIT(syscall);
 }
 
+static inline int audit_match_class_bits(int class, u32 *mask)
+{
+	int i;
+
+	if (classes[class]) {
+		for (i = 0; i < AUDIT_BITMASK_SIZE; i++)
+			if (mask[i] & classes[class][i])
+				return 0;
+	}
+	return 1;
+}
+
+static int audit_match_signal(struct audit_entry *entry)
+{
+	struct audit_field *arch = entry->rule.arch_f;
+
+	if (!arch) {
+		/* When arch is unspecified, we must check both masks on biarch
+		 * as syscall number alone is ambiguous. */
+		return (audit_match_class_bits(AUDIT_CLASS_SIGNAL,
+					       entry->rule.mask) &&
+			audit_match_class_bits(AUDIT_CLASS_SIGNAL_32,
+					       entry->rule.mask));
+	}
+
+	switch(audit_classify_arch(arch->val)) {
+	case 0: /* native */
+		return (audit_match_class_bits(AUDIT_CLASS_SIGNAL,
+					       entry->rule.mask));
+	case 1: /* 32bit on biarch */
+		return (audit_match_class_bits(AUDIT_CLASS_SIGNAL_32,
+					       entry->rule.mask));
+	default:
+		return 1;
+	}
+}
+
 /* Common user-space to kernel rule translation. */
 static inline struct audit_entry *audit_to_entry_common(struct audit_rule *rule)
 {
@@ -429,6 +466,7 @@ static struct audit_entry *audit_rule_to_entry(struct audit_rule *rule)
 				err = -EINVAL;
 				goto exit_free;
 			}
+			entry->rule.arch_f = f;
 			break;
 		case AUDIT_PERM:
 			if (f->val & ~15)
@@ -519,7 +557,6 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
 		case AUDIT_FSGID:
 		case AUDIT_LOGINUID:
 		case AUDIT_PERS:
-		case AUDIT_ARCH:
 		case AUDIT_MSGTYPE:
 		case AUDIT_PPID:
 		case AUDIT_DEVMAJOR:
@@ -531,6 +568,9 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data,
 		case AUDIT_ARG2:
 		case AUDIT_ARG3:
 			break;
+		case AUDIT_ARCH:
+			entry->rule.arch_f = f;
+			break;
 		case AUDIT_SUBJ_USER:
 		case AUDIT_SUBJ_ROLE:
 		case AUDIT_SUBJ_TYPE:
@@ -1221,6 +1261,9 @@ static inline int audit_add_rule(struct audit_entry *entry,
 #ifdef CONFIG_AUDITSYSCALL
 	if (!dont_count)
 		audit_n_rules++;
+
+	if (!audit_match_signal(entry))
+		audit_signals++;
 #endif
 	mutex_unlock(&audit_filter_mutex);
 
@@ -1294,6 +1337,9 @@ static inline int audit_del_rule(struct audit_entry *entry,
 #ifdef CONFIG_AUDITSYSCALL
 	if (!dont_count)
 		audit_n_rules--;
+
+	if (!audit_match_signal(entry))
+		audit_signals--;
 #endif
 	mutex_unlock(&audit_filter_mutex);
 

kernel/auditsc.c

@@ -78,17 +78,15 @@ extern int audit_enabled;
  * for saving names from getname(). */
 #define AUDIT_NAMES    20
 
-/* AUDIT_NAMES_RESERVED is the number of slots we reserve in the
- * audit_context from being used for nameless inodes from
- * path_lookup. */
-#define AUDIT_NAMES_RESERVED 7
-
 /* Indicates that audit should log the full pathname. */
 #define AUDIT_NAME_FULL -1
 
 /* number of audit rules */
 int audit_n_rules;
 
+/* determines whether we collect data for signals sent */
+int audit_signals;
+
 /* When fs/namei.c:getname() is called, we store the pointer in name and
  * we don't let putname() free it (instead we free all of the saved
  * pointers at syscall exit time).
@@ -114,6 +112,9 @@ struct audit_aux_data {
 
 #define AUDIT_AUX_IPCPERM	0
 
+/* Number of target pids per aux struct. */
+#define AUDIT_AUX_PIDS	16
+
 struct audit_aux_data_mq_open {
 	struct audit_aux_data	d;
 	int			oflag;
@@ -181,6 +182,13 @@ struct audit_aux_data_path {
 	struct vfsmount		*mnt;
 };
 
+struct audit_aux_data_pids {
+	struct audit_aux_data	d;
+	pid_t			target_pid[AUDIT_AUX_PIDS];
+	u32			target_sid[AUDIT_AUX_PIDS];
+	int			pid_count;
+};
+
 /* The per-task audit context. */
 struct audit_context {
 	int		    dummy;	/* must be the first element */
@@ -201,6 +209,7 @@ struct audit_context {
 	struct vfsmount *   pwdmnt;
 	struct audit_context *previous; /* For nested syscalls */
 	struct audit_aux_data *aux;
+	struct audit_aux_data *aux_pids;
 
 				/* Save things to print about task_struct */
 	pid_t		    pid, ppid;
@@ -209,6 +218,9 @@ struct audit_context {
 	unsigned long	    personality;
 	int		    arch;
 
+	pid_t		    target_pid;
+	u32		    target_sid;
+
 #if AUDIT_DEBUG
 	int		    put_count;
 	int		    ino_count;
@@ -654,6 +666,10 @@ static inline void audit_free_aux(struct audit_context *context)
 		context->aux = aux->next;
 		kfree(aux);
 	}
+	while ((aux = context->aux_pids)) {
+		context->aux_pids = aux->next;
+		kfree(aux);
+	}
 }
 
 static inline void audit_zero_context(struct audit_context *context,
@@ -795,6 +811,29 @@ static void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk
 	audit_log_task_context(ab);
 }
 
+static int audit_log_pid_context(struct audit_context *context, pid_t pid,
+				 u32 sid)
+{
+	struct audit_buffer *ab;
+	char *s = NULL;
+	u32 len;
+	int rc = 0;
+
+	ab = audit_log_start(context, GFP_KERNEL, AUDIT_OBJ_PID);
+	if (!ab)
+		return 1;
+
+	if (selinux_sid_to_string(sid, &s, &len)) {
+		audit_log_format(ab, "opid=%d obj=(none)", pid);
+		rc = 1;
+	} else
+		audit_log_format(ab, "opid=%d  obj=%s", pid, s);
+	audit_log_end(ab);
+	kfree(s);
+
+	return rc;
+}
+
 static void audit_log_exit(struct audit_context *context, struct task_struct *tsk)
 {
 	int i, call_panic = 0;
@@ -973,6 +1012,21 @@ static void audit_log_exit(struct audit_context *context, struct task_struct *ts
 		audit_log_end(ab);
 	}
 
+	for (aux = context->aux_pids; aux; aux = aux->next) {
+		struct audit_aux_data_pids *axs = (void *)aux;
+		int i;
+
+		for (i = 0; i < axs->pid_count; i++)
+			if (audit_log_pid_context(context, axs->target_pid[i],
+						  axs->target_sid[i]))
+				call_panic = 1;
+	}
+
+	if (context->target_pid &&
+	    audit_log_pid_context(context, context->target_pid,
+				  context->target_sid))
+			call_panic = 1;
+
 	if (context->pwd && context->pwdmnt) {
 		ab = audit_log_start(context, GFP_KERNEL, AUDIT_CWD);
 		if (ab) {
@@ -1193,6 +1247,10 @@ void audit_syscall_exit(int valid, long return_code)
 	} else {
 		audit_free_names(context);
 		audit_free_aux(context);
+		context->aux = NULL;
+		context->aux_pids = NULL;
+		context->target_pid = 0;
+		context->target_sid = 0;
 		kfree(context->filterkey);
 		context->filterkey = NULL;
 		tsk->audit_context = context;
@@ -1226,6 +1284,7 @@ void __audit_getname(const char *name)
 	context->names[context->name_count].name_len = AUDIT_NAME_FULL;
 	context->names[context->name_count].name_put = 1;
 	context->names[context->name_count].ino  = (unsigned long)-1;
+	context->names[context->name_count].osid = 0;
 	++context->name_count;
 	if (!context->pwd) {
 		read_lock(&current->fs->lock);
@@ -1279,6 +1338,28 @@ void audit_putname(const char *name)
 #endif
 }
 
+static int audit_inc_name_count(struct audit_context *context,
+				const struct inode *inode)
+{
+	if (context->name_count >= AUDIT_NAMES) {
+		if (inode)
+			printk(KERN_DEBUG "name_count maxed, losing inode data: "
+			       "dev=%02x:%02x, inode=%lu",
+			       MAJOR(inode->i_sb->s_dev),
+			       MINOR(inode->i_sb->s_dev),
+			       inode->i_ino);
+
+		else
+			printk(KERN_DEBUG "name_count maxed, losing inode data");
+		return 1;
+	}
+	context->name_count++;
+#if AUDIT_DEBUG
+	context->ino_count++;
+#endif
+	return 0;
+}
+
 /* Copy inode data into an audit_names. */
 static void audit_copy_inode(struct audit_names *name, const struct inode *inode)
 {
@@ -1316,13 +1397,10 @@ void __audit_inode(const char *name, const struct inode *inode)
 	else {
 		/* FIXME: how much do we care about inodes that have no
 		 * associated name? */
-		if (context->name_count >= AUDIT_NAMES - AUDIT_NAMES_RESERVED)
+		if (audit_inc_name_count(context, inode))
 			return;
-		idx = context->name_count++;
+		idx = context->name_count - 1;
 		context->names[idx].name = NULL;
-#if AUDIT_DEBUG
-		++context->ino_count;
-#endif
 	}
 	audit_copy_inode(&context->names[idx], inode);
 }
@@ -1346,7 +1424,7 @@ void __audit_inode_child(const char *dname, const struct inode *inode,
 {
 	int idx;
 	struct audit_context *context = current->audit_context;
-	const char *found_name = NULL;
+	const char *found_parent = NULL, *found_child = NULL;
 	int dirlen = 0;
 
 	if (!context->in_syscall)
@@ -1354,88 +1432,73 @@ void __audit_inode_child(const char *dname, const struct inode *inode,
 
 	/* determine matching parent */
 	if (!dname)
-		goto update_context;
-	for (idx = 0; idx < context->name_count; idx++)
-		if (context->names[idx].ino == parent->i_ino) {
-			const char *name = context->names[idx].name;
+		goto add_names;
 
-			if (!name)
-				continue;
+	/* parent is more likely, look for it first */
+	for (idx = 0; idx < context->name_count; idx++) {
+		struct audit_names *n = &context->names[idx];
 
-			if (audit_compare_dname_path(dname, name, &dirlen) == 0) {
-				context->names[idx].name_len = dirlen;
-				found_name = name;
-				break;
-			}
+		if (!n->name)
+			continue;
+
+		if (n->ino == parent->i_ino &&
+		    !audit_compare_dname_path(dname, n->name, &dirlen)) {
+			n->name_len = dirlen; /* update parent data in place */
+			found_parent = n->name;
+			goto add_names;
 		}
+	}
 
-update_context:
-	idx = context->name_count;
-	if (context->name_count == AUDIT_NAMES) {
-		printk(KERN_DEBUG "name_count maxed and losing %s\n",
-			found_name ?: "(null)");
-		return;
+	/* no matching parent, look for matching child */
+	for (idx = 0; idx < context->name_count; idx++) {
+		struct audit_names *n = &context->names[idx];
+
+		if (!n->name)
+			continue;
+
+		/* strcmp() is the more likely scenario */
+		if (!strcmp(dname, n->name) ||
+		     !audit_compare_dname_path(dname, n->name, &dirlen)) {
+			if (inode)
+				audit_copy_inode(n, inode);
+			else
+				n->ino = (unsigned long)-1;
+			found_child = n->name;
+			goto add_names;
+		}
 	}
-	context->name_count++;
-#if AUDIT_DEBUG
-	context->ino_count++;
-#endif
-	/* Re-use the name belonging to the slot for a matching parent directory.
-	 * All names for this context are relinquished in audit_free_names() */
-	context->names[idx].name = found_name;
-	context->names[idx].name_len = AUDIT_NAME_FULL;
-	context->names[idx].name_put = 0;	/* don't call __putname() */
-
-	if (!inode)
-		context->names[idx].ino = (unsigned long)-1;
-	else
-		audit_copy_inode(&context->names[idx], inode);
-
-	/* A parent was not found in audit_names, so copy the inode data for the
-	 * provided parent. */
-	if (!found_name) {
-		idx = context->name_count;
-		if (context->name_count == AUDIT_NAMES) {
-			printk(KERN_DEBUG
-				"name_count maxed and losing parent inode data: dev=%02x:%02x, inode=%lu",
-				MAJOR(parent->i_sb->s_dev),
-				MINOR(parent->i_sb->s_dev),
-				parent->i_ino);
+
+add_names:
+	if (!found_parent) {
+		if (audit_inc_name_count(context, parent))
 			return;
-		}
-		context->name_count++;
-#if AUDIT_DEBUG
-		context->ino_count++;
-#endif
+		idx = context->name_count - 1;
+		context->names[idx].name = NULL;
 		audit_copy_inode(&context->names[idx], parent);
 	}
-}
 
-/**
- * audit_inode_update - update inode info for last collected name
- * @inode: inode being audited
- *
- * When open() is called on an existing object with the O_CREAT flag, the inode
- * data audit initially collects is incorrect.  This additional hook ensures
- * audit has the inode data for the actual object to be opened.
- */
-void __audit_inode_update(const struct inode *inode)
-{
-	struct audit_context *context = current->audit_context;
-	int idx;
+	if (!found_child) {
+		if (audit_inc_name_count(context, inode))
+			return;
+		idx = context->name_count - 1;
 
-	if (!context->in_syscall || !inode)
-		return;
+		/* Re-use the name belonging to the slot for a matching parent
+		 * directory. All names for this context are relinquished in
+		 * audit_free_names() */
+		if (found_parent) {
+			context->names[idx].name = found_parent;
+			context->names[idx].name_len = AUDIT_NAME_FULL;
+			/* don't call __putname() */
+			context->names[idx].name_put = 0;
+		} else {
+			context->names[idx].name = NULL;
+		}
 
-	if (context->name_count == 0) {
-		context->name_count++;
-#if AUDIT_DEBUG
-		context->ino_count++;
-#endif
+		if (inode)
+			audit_copy_inode(&context->names[idx], inode);
+		else
+			context->names[idx].ino = (unsigned long)-1;
 	}
-	idx = context->name_count - 1;
-
-	audit_copy_inode(&context->names[idx], inode);
 }
 
 /**
@@ -1880,6 +1943,14 @@ int audit_sockaddr(int len, void *a)
 	return 0;
 }
 
+void __audit_ptrace(struct task_struct *t)
+{
+	struct audit_context *context = current->audit_context;
+
+	context->target_pid = t->pid;
+	selinux_get_task_sid(t, &context->target_sid);
+}
+
 /**
  * audit_avc_path - record the granting or denial of permissions
  * @dentry: dentry to record
@@ -1918,15 +1989,17 @@ int audit_avc_path(struct dentry *dentry, struct vfsmount *mnt)
  * If the audit subsystem is being terminated, record the task (pid)
  * and uid that is doing that.
  */
-void __audit_signal_info(int sig, struct task_struct *t)
+int __audit_signal_info(int sig, struct task_struct *t)
 {
+	struct audit_aux_data_pids *axp;
+	struct task_struct *tsk = current;
+	struct audit_context *ctx = tsk->audit_context;
 	extern pid_t audit_sig_pid;
 	extern uid_t audit_sig_uid;
 	extern u32 audit_sig_sid;
 
-	if (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1) {
-		struct task_struct *tsk = current;
-		struct audit_context *ctx = tsk->audit_context;
+	if (audit_pid && t->tgid == audit_pid &&
+	    (sig == SIGTERM || sig == SIGHUP || sig == SIGUSR1)) {
 		audit_sig_pid = tsk->pid;
 		if (ctx)
 			audit_sig_uid = ctx->loginuid;
@@ -1934,4 +2007,72 @@ void __audit_signal_info(int sig, struct task_struct *t)
 			audit_sig_uid = tsk->uid;
 		selinux_get_task_sid(tsk, &audit_sig_sid);
 	}
+
+	if (!audit_signals) /* audit_context checked in wrapper */
+		return 0;
+
+	/* optimize the common case by putting first signal recipient directly
+	 * in audit_context */
+	if (!ctx->target_pid) {
+		ctx->target_pid = t->tgid;
+		selinux_get_task_sid(t, &ctx->target_sid);
+		return 0;
+	}
+
+	axp = (void *)ctx->aux_pids;
+	if (!axp || axp->pid_count == AUDIT_AUX_PIDS) {
+		axp = kzalloc(sizeof(*axp), GFP_ATOMIC);
+		if (!axp)
+			return -ENOMEM;
+
+		axp->d.type = AUDIT_OBJ_PID;
+		axp->d.next = ctx->aux_pids;
+		ctx->aux_pids = (void *)axp;
+	}
+	BUG_ON(axp->pid_count > AUDIT_AUX_PIDS);
+
+	axp->target_pid[axp->pid_count] = t->tgid;
+	selinux_get_task_sid(t, &axp->target_sid[axp->pid_count]);
+	axp->pid_count++;
+
+	return 0;
+}
+
+/**
+ * audit_core_dumps - record information about processes that end abnormally
+ * @sig: signal value
+ *
+ * If a process ends with a core dump, something fishy is going on and we
+ * should record the event for investigation.
+ */
+void audit_core_dumps(long signr)
+{
+	struct audit_buffer *ab;
+	u32 sid;
+
+	if (!audit_enabled)
+		return;
+
+	if (signr == SIGQUIT)	/* don't care for those */
+		return;
+
+	ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_ANOM_ABEND);
+	audit_log_format(ab, "auid=%u uid=%u gid=%u",
+			audit_get_loginuid(current->audit_context),
+			current->uid, current->gid);
+	selinux_get_task_sid(current, &sid);
+	if (sid) {
+		char *ctx = NULL;
+		u32 len;
+
+		if (selinux_sid_to_string(sid, &ctx, &len))
+			audit_log_format(ab, " ssid=%u", sid);
+		else
+			audit_log_format(ab, " subj=%s", ctx);
+		kfree(ctx);
+	}
+	audit_log_format(ab, " pid=%d comm=", current->pid);
+	audit_log_untrustedstring(ab, current->comm);
+	audit_log_format(ab, " sig=%ld", signr);
+	audit_log_end(ab);
 }

kernel/ptrace.c

@@ -18,6 +18,7 @@
 #include <linux/ptrace.h>
 #include <linux/security.h>
 #include <linux/signal.h>
+#include <linux/audit.h>
 
 #include <asm/pgtable.h>
 #include <asm/uaccess.h>
@@ -161,6 +162,8 @@ int ptrace_attach(struct task_struct *task)
 {
 	int retval;
 
+	audit_ptrace(task);
+
 	retval = -EPERM;
 	if (task->pid <= 1)
 		goto out;

kernel/signal.c

@@ -497,6 +497,11 @@ static int check_kill_permission(int sig, struct siginfo *info,
 	int error = -EINVAL;
 	if (!valid_signal(sig))
 		return error;
+
+	error = audit_signal_info(sig, t); /* Let audit system see the signal */
+	if (error)
+		return error;
+
 	error = -EPERM;
 	if ((info == SEND_SIG_NOINFO || (!is_si_special(info) && SI_FROMUSER(info)))
 	    && ((sig != SIGCONT) ||
@@ -506,10 +511,7 @@ static int check_kill_permission(int sig, struct siginfo *info,
 	    && !capable(CAP_KILL))
 		return error;
 
-	error = security_task_kill(t, info, sig, 0);
-	if (!error)
-		audit_signal_info(sig, t); /* Let audit system see the signal */
-	return error;
+	return security_task_kill(t, info, sig, 0);
 }
 
 /* forward decl */

lib/audit.c

@@ -23,6 +23,16 @@ static unsigned chattr_class[] = {
 ~0U
 };
 
+static unsigned signal_class[] = {
+#include <asm-generic/audit_signal.h>
+~0U
+};
+
+int audit_classify_arch(int arch)
+{
+	return 0;
+}
+
 int audit_classify_syscall(int abi, unsigned syscall)
 {
 	switch(syscall) {
@@ -49,6 +59,7 @@ static int __init audit_classes_init(void)
 	audit_register_class(AUDIT_CLASS_READ, read_class);
 	audit_register_class(AUDIT_CLASS_DIR_WRITE, dir_class);
 	audit_register_class(AUDIT_CLASS_CHATTR, chattr_class);
+	audit_register_class(AUDIT_CLASS_SIGNAL, signal_class);
 	return 0;
 }