Subject: + fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix.patch added to -mm tree
To: konishi.ryusuke@xxxxxxxxxxxxx,fanwlexca@xxxxxxxxx,slava@xxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Mon, 06 Jan 2014 13:47:08 -0800
The patch titled
has been added to the -mm tree. Its filename is
fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix.patch
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------------------------------------------------------
From: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Signed-off-by: Wenliang Fan <fanwlexca@xxxxxxxxx>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@xxxxxxxxxxxxx>
Cc: Vyacheslav Dubeyko <slava@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nilfs2/ioctl.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff -puN fs/nilfs2/ioctl.c~fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix fs/nilfs2/ioctl.c
--- a/fs/nilfs2/ioctl.c~fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix
+++ a/fs/nilfs2/ioctl.c
@@ -57,7 +57,12 @@ static int nilfs_ioctl_wrap_copy(struct
if (argv->v_size > PAGE_SIZE)
return -EINVAL;
- if (argv->v_index > (~(__u64)0 - argv->v_nmembs))
+ /*
+ * Reject pairs of a start item position (argv->v_index) and a
+ * total count (argv->v_nmembs) which leads position 'pos' to
+ * overflow by the increment at the end of the loop.
+ */
+ if (argv->v_index > ~(__u64)0 - argv->v_nmembs)
return -EINVAL;
buf = (void *)__get_free_pages(GFP_NOFS, 0);
_
Patches currently in -mm which might be from konishi.ryusuke@xxxxxxxxxxxxx are
fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy.patch
fs-nilfs2-fix-integer-overflow-in-nilfs_ioctl_wrap_copy-fix.patch
linux-next.patch
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