The patch titled
Fix /proc/pid/pagemap header copy to userspace
has been added to the -mm tree. Its filename is
maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-header-copy-to-userspace.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 header copy to userspace
From: Dave Boutcher <boutcher@xxxxxxxxxx>
Earlier code relied on a broken length calculation copy /proc/pid/pagemap
header data to userspace. This fix correctly calls the add_to_pagemap
routine after the header data is set to copy results to userspace in a sane
fashion.
Signed-off-by: Dave Boutcher <boutcher@xxxxxxxxxx>
Cc: 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-header-copy-to-userspace fs/proc/task_mmu.c
--- a/fs/proc/task_mmu.c~maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-header-copy-to-userspace
+++ a/fs/proc/task_mmu.c
@@ -689,11 +689,11 @@ static ssize_t pagemap_read(struct file
pm.out = buf;
if (svpfn == -1) {
- add_to_pagemap(pm.next, 0, &pm);
((char *)page)[0] = (ntohl(1) != 1);
((char *)page)[1] = PAGE_SHIFT;
((char *)page)[2] = sizeof(unsigned long);
((char *)page)[3] = sizeof(unsigned long);
+ add_to_pagemap(pm.next, page[0], &pm);
}
down_read(&mm->mmap_sem);
_
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
maps2-add-proc-pid-pagemap-interface-fix-proc-pid-pagemap-header-copy-to-userspace.patch
-
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