Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig
index 600f23d..cd752a3 100644
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -1083,6 +1083,23 @@
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
diff --git a/arch/ppc/kernel/entry.S b/arch/ppc/kernel/entry.S
index 5f075db..6615237 100644
--- a/arch/ppc/kernel/entry.S
+++ b/arch/ppc/kernel/entry.S
@@ -202,7 +202,7 @@
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
@@ -237,7 +237,7 @@
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)
@@ -277,7 +277,8 @@
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)
@@ -291,7 +292,7 @@
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
@@ -303,7 +304,8 @@
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)
@@ -627,8 +629,8 @@
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
diff --git a/arch/ppc/kernel/ppc_ksyms.c b/arch/ppc/kernel/ppc_ksyms.c
index 2ccb58f..d59ad07 100644
--- a/arch/ppc/kernel/ppc_ksyms.c
+++ b/arch/ppc/kernel/ppc_ksyms.c
@@ -55,7 +55,6 @@
#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);
@@ -74,7 +73,6 @@
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);
diff --git a/arch/ppc/kernel/ptrace.c b/arch/ppc/kernel/ptrace.c
index 59d59a8..e7aee41 100644
--- a/arch/ppc/kernel/ptrace.c
+++ b/arch/ppc/kernel/ptrace.c
@@ -27,6 +27,9 @@
#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>
@@ -455,11 +458,10 @@
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));
@@ -473,3 +475,33 @@
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);
diff --git a/include/asm-ppc/seccomp.h b/include/asm-ppc/seccomp.h
new file mode 100644
index 0000000..666c4da
--- /dev/null
+++ b/include/asm-ppc/seccomp.h
@@ -0,0 +1,10 @@
+#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 */
diff --git a/include/asm-ppc/thread_info.h b/include/asm-ppc/thread_info.h
index f7f0152..e3b5284 100644
--- a/include/asm-ppc/thread_info.h
+++ b/include/asm-ppc/thread_info.h
@@ -77,12 +77,19 @@
#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
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 19f04b0..17ea5d5 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -27,15 +27,50 @@
#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 /* Filname 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_AVC 1400 /* SE Linux avc denial or grant */
+#define AUDIT_SELINUX_ERR 1401 /* Internal SE Linux Errors */
+
+#define AUDIT_KERNEL 2000 /* Asynchronous audit record. NOT A REQUEST. */
/* Rule flags */
#define AUDIT_PER_TASK 0x01 /* Apply rule at task creation (not syscall) */
@@ -132,16 +167,9 @@
#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) */
@@ -161,6 +189,11 @@
#ifdef __KERNEL__
+struct audit_sig_info {
+ uid_t uid;
+ pid_t pid;
+};
+
struct audit_buffer;
struct audit_context;
struct inode;
@@ -185,11 +218,14 @@
/* 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,
+extern int audit_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 void audit_signal_info(int sig, struct task_struct *t);
#else
#define audit_alloc(t) ({ 0; })
#define audit_free(t) do { ; } while (0)
@@ -198,18 +234,23 @@
#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 audit_get_stamp(c,t,s) ({ 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_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)));
@@ -229,8 +270,8 @@
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)
diff --git a/init/Kconfig b/init/Kconfig
index d920bae..448939d 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -164,6 +164,7 @@
config AUDIT
bool "Auditing support"
+ depends on NET
default y if SECURITY_SELINUX
help
Enable auditing infrastructure that can be used with another
@@ -173,7 +174,7 @@
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
diff --git a/kernel/audit.c b/kernel/audit.c
index 9c4f1af..bbc6f54 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -46,6 +46,8 @@
#include <asm/types.h>
#include <linux/mm.h>
#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/kthread.h>
#include <linux/audit.h>
@@ -68,7 +70,7 @@
/* 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
@@ -77,7 +79,10 @@
/* 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]
@@ -91,19 +96,17 @@
/* 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
* syscall exit time. */
@@ -112,7 +115,7 @@
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);
@@ -132,21 +135,14 @@
* 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 {
@@ -154,9 +150,6 @@
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)
{
switch (audit_failure)
@@ -227,10 +220,8 @@
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);
@@ -242,7 +233,8 @@
{
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;
}
@@ -251,7 +243,8 @@
{
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;
}
@@ -262,8 +255,9 @@
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;
}
@@ -275,12 +269,44 @@
&& 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)
{
@@ -293,13 +319,16 @@
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 */
@@ -321,10 +350,11 @@
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;
@@ -344,11 +374,21 @@
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;
loginuid = NETLINK_CB(skb).loginuid;
@@ -363,7 +403,7 @@
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;
@@ -382,7 +422,8 @@
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)
@@ -391,8 +432,8 @@
audit_set_backlog_limit(status_get->backlog_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,
@@ -402,8 +443,7 @@
(int)(nlh->nlmsg_len
- ((char *)data - (char *)nlh)),
loginuid, (char *)data);
- ab->type = AUDIT_USER;
- ab->pid = pid;
+ audit_set_pid(ab, pid);
audit_log_end(ab);
break;
case AUDIT_ADD:
@@ -412,12 +452,14 @@
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;
@@ -467,87 +509,6 @@
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)
@@ -558,40 +519,13 @@
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. */
@@ -608,34 +542,30 @@
__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)) {
@@ -646,37 +576,77 @@
}
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;
+}
+
+/* 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;
+
+ 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);
-
- 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
- {
+ if (!audit_get_stamp(ab->ctx, &t, &serial)) {
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
@@ -686,26 +656,35 @@
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
@@ -721,20 +700,47 @@
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;
}
@@ -743,117 +749,63 @@
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);
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 37b3ac9..78d7a13 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -34,7 +34,7 @@
#include <asm/types.h>
#include <linux/mm.h>
#include <linux/module.h>
-
+#include <linux/socket.h>
#include <linux/audit.h>
#include <linux/personality.h>
#include <linux/time.h>
@@ -112,6 +112,18 @@
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];
+};
+
/* The per-task audit context. */
struct audit_context {
@@ -157,6 +169,8 @@
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. */
static int audit_compare_rule(struct audit_rule *a, struct audit_rule *b)
@@ -226,7 +240,6 @@
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)
@@ -287,7 +300,8 @@
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;
@@ -297,7 +311,8 @@
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;
@@ -305,7 +320,6 @@
return err;
}
-#endif
/* Compare a task_struct with an audit_rule. Return 1 on match, 0
* otherwise. */
@@ -444,7 +458,7 @@
/* 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,
@@ -650,7 +664,7 @@
int i;
struct audit_buffer *ab;
- 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);
@@ -682,28 +696,43 @@
while (context->aux) {
struct audit_aux_data *aux;
- ab = audit_log_start(context);
+ aux = context->aux;
+
+ 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=%d igid=%d 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; }
}
audit_log_end(ab);
+
+ context->aux = aux->next;
kfree(aux);
}
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);
@@ -713,7 +742,7 @@
}
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=%d ogid=%d rdev=%02x:%02x",
context->names[i].ino,
MAJOR(context->names[i].dev),
MINOR(context->names[i].dev),
@@ -741,7 +770,7 @@
/* 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);
@@ -750,7 +779,7 @@
/* 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
+ * 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.
@@ -876,7 +905,7 @@
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;
@@ -994,7 +1023,7 @@
context->names[idx].rdev = inode->i_rdev;
}
-void audit_get_stamp(struct audit_context *ctx,
+int audit_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial)
{
if (ctx) {
@@ -1002,26 +1031,22 @@
t->tv_nsec = ctx->ctime.tv_nsec;
*serial = ctx->serial;
ctx->auditable = 1;
- } else {
- *t = CURRENT_TIME;
- *serial = 0;
+ return 1;
}
+ return 0;
}
-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",
task->pid, task->uid,
task->audit_context->loginuid, loginuid);
- audit_set_type(ab, AUDIT_LOGIN);
audit_log_end(ab);
}
task->audit_context->loginuid = loginuid;
@@ -1051,8 +1076,68 @@
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;
+}
+
+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;
+ }
+ }
+}
+
diff --git a/kernel/signal.c b/kernel/signal.c
index 8f3debc..293e189 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -24,6 +24,7 @@
#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>
@@ -658,7 +659,11 @@
&& (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 */
diff --git a/net/socket.c b/net/socket.c
index cec0cb3..6b7c3b5 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -81,6 +81,7 @@
#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 */
@@ -226,7 +227,7 @@
return 0;
if(copy_from_user(kaddr,uaddr,ulen))
return -EFAULT;
- return 0;
+ return audit_sockaddr(ulen, kaddr);
}
/**
@@ -1906,7 +1907,11 @@
/* 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), args);
+ if (err)
+ return err;
+
a0=a[0];
a1=a[1];
diff --git a/security/selinux/avc.c b/security/selinux/avc.c
index 85a6f66..62b963a 100644
--- a/security/selinux/avc.c
+++ b/security/selinux/avc.c
@@ -242,7 +242,7 @@
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)
@@ -532,6 +532,7 @@
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;
@@ -549,12 +550,18 @@
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 (a->tsk && a->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:
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index aae1e79..db845cb 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3419,7 +3419,7 @@
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);
diff --git a/security/selinux/nlmsgtab.c b/security/selinux/nlmsgtab.c
index b3adb48..f0fb6d76 100644
--- a/security/selinux/nlmsgtab.c
+++ b/security/selinux/nlmsgtab.c
@@ -97,6 +97,7 @@
{ 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 },
};
@@ -141,8 +142,13 @@
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 */
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 8449d66..b614914 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -365,7 +365,7 @@
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]);
@@ -742,7 +742,7 @@
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"