From: Matthew Wilcox <willy@infradead.org>
To: Kari Argillander <kari.argillander@gmail.com>
Cc: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>,
linux-fsdevel@vger.kernel.org, viro@zeniv.linux.org.uk,
linux-kernel@vger.kernel.org, pali@kernel.org, dsterba@suse.cz,
aaptel@suse.com, rdunlap@infradead.org, joe@perches.com,
mark@harmstone.com, nborisov@suse.com,
linux-ntfs-dev@lists.sourceforge.net, anton@tuxera.com,
dan.carpenter@oracle.com, hch@lst.de, ebiggers@kernel.org,
andy.lavr@gmail.com
Subject: Re: [PATCH v17 04/10] fs/ntfs3: Add file operations and implementation
Date: Sun, 3 Jan 2021 22:04:44 +0000 [thread overview]
Message-ID: <20210103220444.GA28414@casper.infradead.org> (raw)
In-Reply-To: <20210103215732.vbgcrf42xnao6gw2@kari-VirtualBox>
On Sun, Jan 03, 2021 at 11:57:32PM +0200, Kari Argillander wrote:
> > + /*
> > + * mirror of len, but signed, because run_packed_size()
> > + * works with signed int only
> > + */
> > + len64 = len;
> > +
> > + /* how much bytes is packed len64 */
> > + size_size = run_packed_size(&len64);
>
> Does (s64 *)&len work just fine?
No. run_packed_size() is going to load/store eight bytes to/from that
pointer. You can't just cast a pointer to a different size and expect
it to work (it might happen to work, particularly on little-endian,
but big-endian is going to get completely the wrong value).
next prev parent reply other threads:[~2021-01-03 22:06 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-31 15:23 [PATCH v17 00/10] NTFS read-write driver GPL implementation by Paragon Software Konstantin Komarov
2020-12-31 15:23 ` [PATCH v17 01/10] fs/ntfs3: Add headers and misc files Konstantin Komarov
2021-01-03 23:17 ` Kari Argillander
2021-01-19 10:43 ` Dan Carpenter
2021-01-19 20:34 ` Kari Argillander
2020-12-31 15:23 ` [PATCH v17 02/10] fs/ntfs3: Add initialization of super block Konstantin Komarov
2021-01-03 19:50 ` Kari Argillander
2021-01-18 9:35 ` Konstantin Komarov
2021-01-18 14:09 ` Kari Argillander
2021-01-19 4:03 ` Kari Argillander
2021-01-20 7:20 ` Kari Argillander
2020-12-31 15:23 ` [PATCH v17 03/10] fs/ntfs3: Add bitmap Konstantin Komarov
2020-12-31 15:23 ` [PATCH v17 04/10] fs/ntfs3: Add file operations and implementation Konstantin Komarov
2021-01-03 21:57 ` Kari Argillander
2021-01-03 22:04 ` Matthew Wilcox [this message]
2021-01-18 10:00 ` Konstantin Komarov
2021-01-18 14:24 ` Kari Argillander
2021-01-04 2:18 ` Matthew Wilcox
2020-12-31 15:23 ` [PATCH v17 05/10] fs/ntfs3: Add attrib operations Konstantin Komarov
2021-01-04 0:25 ` Kari Argillander
2021-01-18 12:01 ` Konstantin Komarov
2020-12-31 15:23 ` [PATCH v17 06/10] fs/ntfs3: Add compression Konstantin Komarov
2020-12-31 15:23 ` [PATCH v17 07/10] fs/ntfs3: Add NTFS journal Konstantin Komarov
2021-01-03 22:47 ` Kari Argillander
2020-12-31 15:23 ` [PATCH v17 08/10] fs/ntfs3: Add Kconfig, Makefile and doc Konstantin Komarov
2021-01-03 22:07 ` Kari Argillander
2021-01-18 11:43 ` Konstantin Komarov
2021-01-18 13:42 ` Mark Harmstone
2020-12-31 15:24 ` [PATCH v17 09/10] fs/ntfs3: Add NTFS3 in fs/Kconfig and fs/Makefile Konstantin Komarov
2020-12-31 15:24 ` [PATCH v17 10/10] fs/ntfs3: Add MAINTAINERS Konstantin Komarov
2021-01-03 20:01 ` Kari Argillander
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