[AUDIT] Don't allow ptrace to fool auditing, log arch of audited syscalls.
We were calling ptrace_notify() after auditing the syscall and arguments,
but the debugger could have _changed_ them before the syscall was actually
invoked. Reorder the calls to fix that.
While we're touching ever call to audit_syscall_entry(), we also make it
take an extra argument: the architecture of the syscall which was made,
because some architectures allow more than one type of syscall.
Also add an explicit success/failure flag to audit_syscall_exit(), for
the benefit of architectures which return that in a condition register
rather than only returning a single register.
Change type of syscall return value to 'long' not 'int'.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/linux/audit.h b/include/linux/audit.h
index 9b77992..fad0c1d 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -24,6 +24,9 @@
#ifndef _LINUX_AUDIT_H_
#define _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) */
@@ -67,6 +70,7 @@
#define AUDIT_FSGID 8
#define AUDIT_LOGINUID 9
#define AUDIT_PERS 10
+#define AUDIT_ARCH 11
/* These are ONLY useful when checking
* at syscall exit time (AUDIT_AT_EXIT). */
@@ -96,6 +100,38 @@
#define AUDIT_FAIL_PRINTK 1
#define AUDIT_FAIL_PANIC 2
+/* distinguish syscall tables */
+#define __AUDIT_ARCH_64BIT 0x80000000
+#define __AUDIT_ARCH_LE 0x40000000
+#define AUDIT_ARCH_ALPHA (EM_ALPHA|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_ARM (EM_ARM|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_ARMEB (EM_ARM)
+#define AUDIT_ARCH_CRIS (EM_CRIS|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_FRV (EM_FRV)
+#define AUDIT_ARCH_H8300 (EM_H8_300)
+#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_IA64 (EM_IA_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_M32R (EM_M32R)
+#define AUDIT_ARCH_M68K (EM_68K)
+#define AUDIT_ARCH_MIPS (EM_MIPS)
+#define AUDIT_ARCH_MIPSEL (EM_MIPS|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_MIPS64 (EM_MIPS|__AUDIT_ARCH_64BIT)
+#define AUDIT_ARCH_MIPSEL64 (EM_MIPS|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_PARISC (EM_PARISC)
+#define AUDIT_ARCH_PARISC64 (EM_PARISC|__AUDIT_ARCH_64BIT)
+#define AUDIT_ARCH_PPC (EM_PPC)
+#define AUDIT_ARCH_PPC64 (EM_PPC64|__AUDIT_ARCH_64BIT)
+#define AUDIT_ARCH_S390 (EM_S390)
+#define AUDIT_ARCH_S390X (EM_S390|__AUDIT_ARCH_64BIT)
+#define AUDIT_ARCH_SH (EM_SH)
+#define AUDIT_ARCH_SHEL (EM_SH|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_SH64 (EM_SH|__AUDIT_ARCH_64BIT)
+#define AUDIT_ARCH_SHEL64 (EM_SH|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE)
+#define AUDIT_ARCH_SPARC (EM_SPARC)
+#define AUDIT_ARCH_SPARC64 (EM_SPARC64|__AUDIT_ARCH_64BIT)
+#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;
@@ -129,15 +165,19 @@
struct audit_context;
struct inode;
+#define AUDITSC_INVALID 0
+#define AUDITSC_SUCCESS 1
+#define AUDITSC_FAILURE 2
+#define AUDITSC_RESULT(x) ( ((long)(x))<0?AUDITSC_FAILURE:AUDITSC_SUCCESS )
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
/* Public API */
extern int audit_alloc(struct task_struct *task);
extern void audit_free(struct task_struct *task);
-extern void audit_syscall_entry(struct task_struct *task,
+extern void audit_syscall_entry(struct task_struct *task, int arch,
int major, unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3);
-extern void audit_syscall_exit(struct task_struct *task, int return_code);
+extern void audit_syscall_exit(struct task_struct *task, int failed, long return_code);
extern void audit_getname(const char *name);
extern void audit_putname(const char *name);
extern void audit_inode(const char *name, const struct inode *inode);
@@ -153,8 +193,8 @@
#else
#define audit_alloc(t) ({ 0; })
#define audit_free(t) do { ; } while (0)
-#define audit_syscall_entry(t,a,b,c,d,e) do { ; } while (0)
-#define audit_syscall_exit(t,r) do { ; } while (0)
+#define audit_syscall_entry(t,ta,a,b,c,d,e) do { ; } while (0)
+#define audit_syscall_exit(t,f,r) 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)