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Commit b4bf802a authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Al Viro
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mm/nommu: switch do_mmap_private to kernel_read 



Instead of playing with the address limit.  This also gains us
validation of the kvec and proper atime updates.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 9a779bc1

mm/nommu.c

+1 −6
Original line number Diff line number Diff line
@@ -1164,17 +1164,12 @@ static int do_mmap_private(struct vm_area_struct *vma, 


	if (vma->vm_file) {

		/* read the contents of a file into the copy */

		mm_segment_t old_fs;

		loff_t fpos;



		fpos = vma->vm_pgoff;

		fpos <<= PAGE_SHIFT;



		old_fs = get_fs();

		set_fs(KERNEL_DS);

		ret = __vfs_read(vma->vm_file, base, len, &fpos);

		set_fs(old_fs);



		ret = kernel_read(vma->vm_file, base, len, &fpos);

		if (ret < 0)

			goto error_free;