1 files changed, 36 insertions, 11 deletions

diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 9e730c7bf0cd..4c1d2f5442b3 100644
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -635,11 +635,17 @@ ia64_flush_fph (struct task_struct *task)
 {
         struct ia64_psr *psr = ia64_psr(ia64_task_regs(task));
 
+        /*
+         * Prevent migrating this task while
+         * we're fiddling with the FPU state
+         */
+        preempt_disable();
         if (ia64_is_local_fpu_owner(task) && psr->mfh) {
                 psr->mfh = 0;
                 task->thread.flags |= IA64_THREAD_FPH_VALID;
                 ia64_save_fpu(&task->thread.fph[0]);
         }
+        preempt_enable();
 }
 
 /*
@@ -692,16 +698,30 @@ convert_to_non_syscall (struct task_struct *child, struct pt_regs  *pt,
                         unsigned long cfm)
 {
         struct unw_frame_info info, prev_info;
-        unsigned long ip, pr;
+        unsigned long ip, sp, pr;
 
         unw_init_from_blocked_task(&info, child);
         while (1) {
                 prev_info = info;
                 if (unw_unwind(&info) < 0)
                         return;
-                if (unw_get_rp(&info, &ip) < 0)
+
+                unw_get_sp(&info, &sp);
+                if ((long)((unsigned long)child + IA64_STK_OFFSET - sp)
+                    < IA64_PT_REGS_SIZE) {
+                        dprintk("ptrace.%s: ran off the top of the kernel "
+                                "stack\n", __FUNCTION__);
+                        return;
+                }
+                if (unw_get_pr (&prev_info, &pr) < 0) {
+                        unw_get_rp(&prev_info, &ip);
+                        dprintk("ptrace.%s: failed to read "
+                                "predicate register (ip=0x%lx)\n",
+                                __FUNCTION__, ip);
                         return;
-                if (ip < FIXADDR_USER_END)
+                }
+                if (unw_is_intr_frame(&info)
+                    && (pr & (1UL << PRED_USER_STACK)))
                         break;
         }
 
@@ -1616,20 +1636,25 @@ syscall_trace_enter (long arg0, long arg1, long arg2, long arg3,
                      long arg4, long arg5, long arg6, long arg7,
                      struct pt_regs regs)
 {
-        long syscall;
+        if (test_thread_flag(TIF_SYSCALL_TRACE) 
+            && (current->ptrace & PT_PTRACED))
+                syscall_trace();
 
         if (unlikely(current->audit_context)) {
-                if (IS_IA32_PROCESS(&regs))
+                long syscall;
+                int arch;
+
+                if (IS_IA32_PROCESS(&regs)) {
                         syscall = regs.r1;
-                else
+                        arch = AUDIT_ARCH_I386;
+                } else {
                         syscall = regs.r15;
+                        arch = AUDIT_ARCH_IA64;
+                }
 
-                audit_syscall_entry(current, syscall, arg0, arg1, arg2, arg3);
+                audit_syscall_entry(current, arch, syscall, arg0, arg1, arg2, arg3);
         }
 
-        if (test_thread_flag(TIF_SYSCALL_TRACE)
-            && (current->ptrace & PT_PTRACED))
-                syscall_trace();
 }
 
 /* "asmlinkage" so the input arguments are preserved... */
@@ -1640,7 +1665,7 @@ syscall_trace_leave (long arg0, long arg1, long arg2, long arg3,
                      struct pt_regs regs)
 {
         if (unlikely(current->audit_context))
-                audit_syscall_exit(current, regs.r8);
+                audit_syscall_exit(current, AUDITSC_RESULT(regs.r10), regs.r8);
 
         if (test_thread_flag(TIF_SYSCALL_TRACE)
             && (current->ptrace & PT_PTRACED))