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Commit d1af65d1 authored by David Miller's avatar David Miller Committed by Linus Torvalds
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[PATCH] Bug in MM_RB debugging 



The code is seemingly trying to make sure that rb_next() brings us to
successive increasing vma entries.

But the two variables, prev and pend, used to perform these checks, are
never advanced.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Cc: Andrea Arcangeli <andrea@novell.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 04a51e66

mm/mmap.c

+2 −0
Original line number Diff line number Diff line
@@ -299,6 +299,8 @@ static int browse_rb(struct rb_root *root) 
			printk("vm_end %lx < vm_start %lx\n", vma->vm_end, vma->vm_start);

		i++;

		pn = nd;

		prev = vma->vm_start;

		pend = vma->vm_end;

	}

	j = 0;

	for (nd = pn; nd; nd = rb_prev(nd)) {