Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6

[pandora-kernel.git] / arch / s390 / kernel / ptrace.c

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 2815bfe..c8b0828 100644 (file)
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -170,6 +170,13 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
                 */
                tmp = (addr_t) task_pt_regs(child)->orig_gpr2;
 
+       } else if (addr < (addr_t) &dummy->regs.fp_regs) {
+               /*
+                * prevent reads of padding hole between
+                * orig_gpr2 and fp_regs on s390.
+                */
+               tmp = 0;
+
        } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
                /* 
                 * floating point regs. are stored in the thread structure
@@ -270,6 +277,13 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
                 */
                task_pt_regs(child)->orig_gpr2 = data;
 
+       } else if (addr < (addr_t) &dummy->regs.fp_regs) {
+               /*
+                * prevent writes of padding hole between
+                * orig_gpr2 and fp_regs on s390.
+                */
+               return 0;
+
        } else if (addr < (addr_t) (&dummy->regs.fp_regs + 1)) {
                /*
                 * floating point regs. are stored in the thread structure
@@ -428,6 +442,13 @@ static u32 __peek_user_compat(struct task_struct *child, addr_t addr)
                 */
                tmp = *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4);
 
+       } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
+               /*
+                * prevent reads of padding hole between
+                * orig_gpr2 and fp_regs on s390.
+                */
+               tmp = 0;
+
        } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
                /*
                 * floating point regs. are stored in the thread structure 
@@ -514,6 +535,13 @@ static int __poke_user_compat(struct task_struct *child,
                 */
                *(__u32*)((addr_t) &task_pt_regs(child)->orig_gpr2 + 4) = tmp;
 
+       } else if (addr < (addr_t) &dummy32->regs.fp_regs) {
+               /*
+                * prevent writess of padding hole between
+                * orig_gpr2 and fp_regs on s390.
+                */
+               return 0;
+
        } else if (addr < (addr_t) (&dummy32->regs.fp_regs + 1)) {
                /*
                 * floating point regs. are stored in the thread structure