diff options
Diffstat (limited to 'arch/x86_64/kernel')
-rw-r--r-- | arch/x86_64/kernel/ptrace.c | 43 |
1 files changed, 1 insertions, 42 deletions
diff --git a/arch/x86_64/kernel/ptrace.c b/arch/x86_64/kernel/ptrace.c index bbf64b5..a87b6ce 100644 --- a/arch/x86_64/kernel/ptrace.c +++ b/arch/x86_64/kernel/ptrace.c @@ -313,48 +313,11 @@ static unsigned long getreg(struct task_struct *child, unsigned long regno) } -asmlinkage long sys_ptrace(long request, long pid, unsigned long addr, long data) +long arch_ptrace(struct task_struct *child, long request, long addr, long data) { - struct task_struct *child; long i, ret; unsigned ui; - /* This lock_kernel fixes a subtle race with suid exec */ - lock_kernel(); - ret = -EPERM; - if (request == PTRACE_TRACEME) { - /* are we already being traced? */ - if (current->ptrace & PT_PTRACED) - goto out; - ret = security_ptrace(current->parent, current); - if (ret) - goto out; - /* set the ptrace bit in the process flags. */ - current->ptrace |= PT_PTRACED; - ret = 0; - goto out; - } - ret = -ESRCH; - read_lock(&tasklist_lock); - child = find_task_by_pid(pid); - if (child) - get_task_struct(child); - read_unlock(&tasklist_lock); - if (!child) - goto out; - - ret = -EPERM; - if (pid == 1) /* you may not mess with init */ - goto out_tsk; - - if (request == PTRACE_ATTACH) { - ret = ptrace_attach(child); - goto out_tsk; - } - ret = ptrace_check_attach(child, request == PTRACE_KILL); - if (ret < 0) - goto out_tsk; - switch (request) { /* when I and D space are separate, these will need to be fixed. */ case PTRACE_PEEKTEXT: /* read word at location addr. */ @@ -608,10 +571,6 @@ asmlinkage long sys_ptrace(long request, long pid, unsigned long addr, long data ret = ptrace_request(child, request, addr, data); break; } -out_tsk: - put_task_struct(child); -out: - unlock_kernel(); return ret; } |