From: Dave Chinner <david@fromorbit.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: a.sahrawat@samsung.com, xfs@oss.sgi.com,
Vivek Trivedi <t.vivek@samsung.com>,
pankaj.m@samsung.com
Subject: Re: [PATCH v2 2/4] xfsprogs: fix integer overflow in xlog_find_verify_cycle
Date: Mon, 21 Dec 2015 10:45:20 +1100 [thread overview]
Message-ID: <20151220234520.GU26718@dastard> (raw)
In-Reply-To: <20151220153513.GD20135@infradead.org>
On Sun, Dec 20, 2015 at 07:35:13AM -0800, Christoph Hellwig wrote:
> On Fri, Dec 11, 2015 at 04:39:01PM +0530, Vivek Trivedi wrote:
> > Fix unintentional integer overflow in xlog_find_verify_cycle.
> > Reported by coverity.
>
> xfs_daddr_t is a 64-bit integer. How does replacing it with an int fix
> overlows?
xfs_daddr_t is being abused here as a count rather than a disk
address, whereas all the other counts in the function are ints and
so the value can't be more than 32 bits anyway....
> xlog_find_verify_cycle originates in the kernel code, so any fix
> should probably be done there first.
I'll pull all the libxfs changes made first in userspace back into
the kernel - no point making people jump throw hoops just to get a
fix into the libxfs code...
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2015-12-20 23:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-11 11:08 [PATCH v2 0/4] xfsprogs misc fixes Vivek Trivedi
2015-12-11 11:09 ` [PATCH v2 1/4] xfsprogs: xfs_io: fix a memory leak in imap_f Vivek Trivedi
2015-12-20 15:33 ` Christoph Hellwig
2015-12-20 23:48 ` Dave Chinner
2015-12-11 11:09 ` [PATCH v2 2/4] xfsprogs: fix integer overflow in xlog_find_verify_cycle Vivek Trivedi
2015-12-20 15:35 ` Christoph Hellwig
2015-12-20 23:45 ` Dave Chinner [this message]
2015-12-11 11:09 ` [PATCH v2 3/4] xfsprogs: mkfs: fix unintentional integer overflow Vivek Trivedi
2015-12-20 15:36 ` Christoph Hellwig
2015-12-20 23:51 ` Dave Chinner
2015-12-11 11:09 ` [PATCH v2 4/4] xfsprogs: xfsdb: remove unnessary checks in process_leaf_node_dir_v2_free Vivek Trivedi
2015-12-20 15:37 ` Christoph Hellwig
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