diff options
| -rw-r--r-- | arch/sparc64/kernel/ptrace.c | 136 |
1 files changed, 115 insertions, 21 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c index aaae865e7932..7963595c77cc 100644 --- a/arch/sparc64/kernel/ptrace.c +++ b/arch/sparc64/kernel/ptrace.c @@ -138,8 +138,17 @@ static int genregs64_get(struct task_struct *target, (regs->u_regs[UREG_I6] + STACK_BIAS); unsigned long window[16]; - if (copy_from_user(window, reg_window, sizeof(window))) - return -EFAULT; + if (target == current) { + if (copy_from_user(window, reg_window, sizeof(window))) + return -EFAULT; + } else { + if (access_process_vm(target, + (unsigned long) reg_window, + window, + sizeof(window), 0) != + sizeof(window)) + return -EFAULT; + } ret = user_regset_copyout(&pos, &count, &kbuf, &ubuf, window, @@ -190,16 +199,37 @@ static int genregs64_set(struct task_struct *target, (regs->u_regs[UREG_I6] + STACK_BIAS); unsigned long window[16]; - if (copy_from_user(window, reg_window, sizeof(window))) - return -EFAULT; + if (target == current) { + if (copy_from_user(window, reg_window, sizeof(window))) + return -EFAULT; + } else { + if (access_process_vm(target, + (unsigned long) reg_window, + window, + sizeof(window), 0) != + sizeof(window)) + return -EFAULT; + } ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf, window, 16 * sizeof(u64), 32 * sizeof(u64)); - if (!ret && - copy_to_user(reg_window, window, sizeof(window))) - return -EFAULT; + if (!ret) { + if (target == current) { + if (copy_to_user(reg_window, window, + sizeof(window))) + return -EFAULT; + } else { + if (access_process_vm(target, + (unsigned long) + reg_window, + window, + sizeof(window), 1) != + sizeof(window)) + return -EFAULT; + } + } } if (!ret && count > 0) { @@ -412,9 +442,22 @@ static int genregs32_get(struct task_struct *target, *k++ = regs->u_regs[pos++]; reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; - for (; count > 0 && pos < 32; count--) { - if (get_user(*k++, ®_window[pos++])) - return -EFAULT; + if (target == current) { + for (; count > 0 && pos < 32; count--) { + if (get_user(*k++, ®_window[pos++])) + return -EFAULT; + } + } else { + for (; count > 0 && pos < 32; count--) { + if (access_process_vm(target, + (unsigned long) + ®_window[pos], + k, sizeof(*k), 0) + != sizeof(*k)) + return -EFAULT; + k++; + pos++; + } } } else { for (; count > 0 && pos < 16; count--) { @@ -423,10 +466,28 @@ static int genregs32_get(struct task_struct *target, } reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; - for (; count > 0 && pos < 32; count--) { - if (get_user(reg, ®_window[pos++]) || - put_user(reg, u++)) - return -EFAULT; + if (target == current) { + for (; count > 0 && pos < 32; count--) { + if (get_user(reg, ®_window[pos++]) || + put_user(reg, u++)) + return -EFAULT; + } + } else { + for (; count > 0 && pos < 32; count--) { + if (access_process_vm(target, + (unsigned long) + ®_window[pos], + ®, sizeof(reg), 0) + != sizeof(reg)) + return -EFAULT; + if (access_process_vm(target, + (unsigned long) u, + ®, sizeof(reg), 1) + != sizeof(reg)) + return -EFAULT; + pos++; + u++; + } } } while (count > 0) { @@ -488,9 +549,23 @@ static int genregs32_set(struct task_struct *target, regs->u_regs[pos++] = *k++; reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; - for (; count > 0 && pos < 32; count--) { - if (put_user(*k++, ®_window[pos++])) - return -EFAULT; + if (target == current) { + for (; count > 0 && pos < 32; count--) { + if (put_user(*k++, ®_window[pos++])) + return -EFAULT; + } + } else { + for (; count > 0 && pos < 32; count--) { + if (access_process_vm(target, + (unsigned long) + ®_window[pos], + (void *) k, + sizeof(*k), 1) + != sizeof(*k)) + return -EFAULT; + k++; + pos++; + } } } else { for (; count > 0 && pos < 16; count--) { @@ -500,10 +575,29 @@ static int genregs32_set(struct task_struct *target, } reg_window = (compat_ulong_t __user *) regs->u_regs[UREG_I6]; - for (; count > 0 && pos < 32; count--) { - if (get_user(reg, u++) || - put_user(reg, ®_window[pos++])) - return -EFAULT; + if (target == current) { + for (; count > 0 && pos < 32; count--) { + if (get_user(reg, u++) || + put_user(reg, ®_window[pos++])) + return -EFAULT; + } + } else { + for (; count > 0 && pos < 32; count--) { + if (access_process_vm(target, + (unsigned long) + u, + ®, sizeof(reg), 0) + != sizeof(reg)) + return -EFAULT; + if (access_process_vm(target, + (unsigned long) + ®_window[pos], + ®, sizeof(reg), 1) + != sizeof(reg)) + return -EFAULT; + pos++; + u++; + } } } while (count > 0) { |