Messages in this thread | | | Date | Sun, 25 Mar 2007 00:26:56 -0800 | From | Andrew Morton <> | Subject | Re: [Patch 5/7] integrity: mtime patch for mmap files |
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On Fri, 23 Mar 2007 12:09:58 -0400 Mimi Zohar <zohar@linux.vnet.ibm.com> wrote:
> mmaped files are hashed and hmac'ed properly by EVM after being modified > when the file's mtime is updated correctly. Peter Staubach's 'memory > mapped files not updating timestamps v2' patch properly updates the > mmapped file's mtime. In those cases when an application does not > first msync the file before calling munmap, the mtime is eventually > updated, but not before file_close is called. This patch forces the > mtime for mmaped files to be updated in a timely manner.
I don't think we've ever had that patch in -mm?
> signed-off-by: Mimi Zohar <zohar@us.ibm.com> > ---- > Index: linux-2.6.21-rc4-mm1/mm/mmap.c > =================================================================== > --- linux-2.6.21-rc4-mm1.orig/mm/mmap.c > +++ linux-2.6.21-rc4-mm1/mm/mmap.c > @@ -1790,6 +1790,7 @@ int do_munmap(struct mm_struct *mm, unsi > { > unsigned long end; > struct vm_area_struct *vma, *prev, *last; > + struct file *file; > > if ((start & ~PAGE_MASK) || start > TASK_SIZE || len > TASK_SIZE-start) > return -EINVAL; > @@ -1808,6 +1809,10 @@ int do_munmap(struct mm_struct *mm, unsi > if (vma->vm_start >= end) > return 0; > > + file = vma->vm_file; > + if (file && test_and_clear_bit(AS_MCTIME, &file->f_mapping->flags)) > + file_update_time(file); > + > /* > * If we need to split any vma, do it now to save pain later. > *
Hence this won't compile. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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