[patch 2/2] fs, proc: Introduce the /proc/<pid>/map_files/ directory v6
gorcunov at gmail.com
Wed Aug 31 03:12:26 PDT 2011
On Wed, Aug 31, 2011 at 01:06:12PM +0400, Vasiliy Kulikov wrote:
> On Wed, Aug 31, 2011 at 11:58 +0400, Cyrill Gorcunov wrote:
> > From: Pavel Emelyanov <xemul at parallels.com>
> > This one behaves similarly to the /proc/<pid>/fd/ one - it contains symlinks
> > one for each mapping with file, the name of a symlink is "vma->vm_start-vma->vm_end",
> > the target is the file. Opening a symlink results in a file that point exactly
> > to the same inode as them vma's one.
> I'm late noting it before the RFCv6 :) Besides checking
> ptrace_may_access() on ->lookup and ->readdir you also should define
> ->stat, otherwise you can bypass ptrace checks if there is a
> corresponding dentry in the cache. The same issue existed in fd* handlers:
Yeah, good point, thanks Vasiliy.
More information about the Containers