The patch titled
Fix /proc/pid/pagemap end address calculation
has been added to the -mm tree. Its filename is
maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-end-address-calculation.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Fix /proc/pid/pagemap end address calculation
From: boutcher@xxxxxxxxxx (Dave Boutcher)
When dumping vma information the pagemap_read routine calculates the
minimum of what the user asks for and the end of the vma. Unfortunately
the code uses vma->vm_start rather than vma->vm_end which can result in the
end address being before the start, and a nasty never-ending loop in the
kernel.
Signed-off-by: Dave Boutcher <boutcher@xxxxxxxxxx>
Acked-by: Matt Mackall <mpm@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/proc/task_mmu.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN fs/proc/task_mmu.c~maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-end-address-calculation fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-end-address-calculation
+++ a/fs/proc/task_mmu.c
@@ -703,7 +703,7 @@ static ssize_t pagemap_read(struct file
ret = -EIO;
goto out_mm;
}
- vend = min(vma->vm_start - 1, end - 1) + 1;
+ vend = min(vma->vm_end - 1, end - 1) + 1;
ret = pagemap_fill(&pm, vend);
if (ret || !pm.count)
break;
_
Patches currently in -mm which might be from boutcher@xxxxxxxxxx are
maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-return-length-calculation.patch
maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-end-address-calculation.patch
-
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