Patch "partitions/msdos: FreeBSD UFS2 file systems are not recognized" has been added to the 4.9-stable tree

Patch "partitions/msdos: FreeBSD UFS2 file systems are not recognized" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    partitions/msdos: FreeBSD UFS2 file systems are not recognized

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     partitions-msdos-freebsd-ufs2-file-systems-are-not-recognized.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 223220356d5ebc05ead9a8d697abb0c0a906fc81 Mon Sep 17 00:00:00 2001
From: Richard <richard@aaazen.com>
Date: Sun, 21 May 2017 12:27:00 -0700
Subject: partitions/msdos: FreeBSD UFS2 file systems are not recognized

From: Richard <richard@aaazen.com>

commit 223220356d5ebc05ead9a8d697abb0c0a906fc81 upstream.

The code in block/partitions/msdos.c recognizes FreeBSD, OpenBSD
and NetBSD partitions and does a reasonable job picking out OpenBSD
and NetBSD UFS subpartitions.

But for FreeBSD the subpartitions are always "bad".

    Kernel: <bsd:bad subpartition - ignored

Though all 3 of these BSD systems use UFS as a file system, only
FreeBSD uses relative start addresses in the subpartition
declarations.

The following patch fixes this for FreeBSD partitions and leaves
the code for OpenBSD and NetBSD intact:

Signed-off-by: Richard Narron <comet.berkeley@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 block/partitions/msdos.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/block/partitions/msdos.c
+++ b/block/partitions/msdos.c
@@ -300,6 +300,8 @@ static void parse_bsd(struct parsed_part
 			continue;
 		bsd_start = le32_to_cpu(p->p_offset);
 		bsd_size = le32_to_cpu(p->p_size);
+		if (memcmp(flavour, "bsd\0", 4) == 0)
+			bsd_start += offset;
 		if (offset == bsd_start && size == bsd_size)
 			/* full parent partition, we have it already */
 			continue;


Patches currently in stable-queue which might be from richard@aaazen.com are

queue-4.9/partitions-msdos-freebsd-ufs2-file-systems-are-not-recognized.patch