2 files changed, 11 insertions, 1 deletions

diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h
index 6794ffaae433..e7773e0af865 100644
--- a/include/asm-x86_64/pda.h
+++ b/include/asm-x86_64/pda.h
@@ -16,7 +16,12 @@ struct x8664_pda {
         unsigned long oldrsp;       /* 24 user rsp for system call */
         int irqcount;               /* 32 Irq nesting counter. Starts with -1 */
         int cpunumber;              /* 36 Logical CPU number */
-        char *irqstackptr;      /* 40 top of irqstack */
+#ifdef CONFIG_CC_STACKPROTECTOR
+        unsigned long stack_canary;     /* 40 stack canary value */
+                                        /* gcc-ABI: this canary MUST be at
+                                           offset 40!!! */
+#endif
+        char *irqstackptr;
         int nodenumber;             /* number of current node */
         unsigned int __softirq_pending;
         unsigned int __nmi_count;       /* number of NMI on this CPUs */
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 807556c5bcd2..9d4aa7f95bc8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -819,6 +819,11 @@ struct task_struct {
         unsigned did_exec:1;
         pid_t pid;
         pid_t tgid;
+
+#ifdef CONFIG_CC_STACKPROTECTOR
+        /* Canary value for the -fstack-protector gcc feature */
+        unsigned long stack_canary;
+#endif
         /* 
          * pointers to (original) parent process, youngest child, younger sibling,
          * older sibling, respectively.  (p->father can be replaced with