1 files changed, 9 insertions, 4 deletions

diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c
index e26e86bb56f..60dc9b98951 100644
--- a/arch/x86_64/kernel/ptrace.c
+++ b/arch/x86_64/kernel/ptrace.c
@@ -257,13 +257,13 @@ static int putreg(struct task_struct *child,
                         value &= 0xffff;
                         return 0;
                 case offsetof(struct user_regs_struct,fs_base):
-                        if (!((value >> 48) == 0 || (value >> 48) == 0xffff))
-                                return -EIO; 
+                        if (value >= TASK_SIZE)
+                                return -EIO;
                         child->thread.fs = value;
                         return 0;
                 case offsetof(struct user_regs_struct,gs_base):
-                        if (!((value >> 48) == 0 || (value >> 48) == 0xffff))
-                                return -EIO; 
+                        if (value >= TASK_SIZE)
+                                return -EIO;
                         child->thread.gs = value;
                         return 0;
                 case offsetof(struct user_regs_struct, eflags):
@@ -277,6 +277,11 @@ static int putreg(struct task_struct *child,
                                 return -EIO;
                         value &= 0xffff;
                         break;
+                case offsetof(struct user_regs_struct, rip):
+                        /* Check if the new RIP address is canonical */
+                        if (value >= TASK_SIZE)
+                                return -EIO;
+                        break;
         }
         put_stack_long(child, regno - sizeof(struct pt_regs), value);
         return 0;