diff options
Diffstat (limited to 'arch/x86/kernel/ptrace_64.c')
| -rw-r--r-- | arch/x86/kernel/ptrace_64.c | 26 |
1 files changed, 11 insertions, 15 deletions
diff --git a/arch/x86/kernel/ptrace_64.c b/arch/x86/kernel/ptrace_64.c index 1edece36044c..375fadc23a25 100644 --- a/arch/x86/kernel/ptrace_64.c +++ b/arch/x86/kernel/ptrace_64.c @@ -474,23 +474,19 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) 64bit debugger to fully examine them too. Better don't use it against 64bit processes, use PTRACE_ARCH_PRCTL instead. */ - case PTRACE_SET_THREAD_AREA: { - struct user_desc __user *p; - int old; - p = (struct user_desc __user *)data; - get_user(old, &p->entry_number); - put_user(addr, &p->entry_number); - ret = do_set_thread_area(&child->thread, p); - put_user(old, &p->entry_number); - break; case PTRACE_GET_THREAD_AREA: - p = (struct user_desc __user *)data; - get_user(old, &p->entry_number); - put_user(addr, &p->entry_number); - ret = do_get_thread_area(&child->thread, p); - put_user(old, &p->entry_number); + if (addr < 0) + return -EIO; + ret = do_get_thread_area(child, addr, + (struct user_desc __user *) data); + + break; + case PTRACE_SET_THREAD_AREA: + if (addr < 0) + return -EIO; + ret = do_set_thread_area(child, addr, + (struct user_desc __user *) data, 0); break; - } #endif /* normal 64bit interface to access TLS data. Works just like arch_prctl, except that the arguments |