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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     "Darrick J. Wong" <darrick.wong@oracle.com>,
        Bill O'Donnell <billodo@redhat.com>,
        Sasha Levin <sashal@kernel.org>, linux-xfs@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 051/219] xfs: require both realtime inodes to mount
Date:   Fri, 22 Nov 2019 00:46:23 -0500
Message-Id: <20191122054911.1750-44-sashal@kernel.org>
In-Reply-To: <20191122054911.1750-1-sashal@kernel.org>
References: <20191122054911.1750-1-sashal@kernel.org>
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From: "Darrick J. Wong" <darrick.wong@oracle.com>

[ Upstream commit 64bafd2f1e484e27071e7584642005d56516cb77 ]

Since mkfs always formats the filesystem with the realtime bitmap and
summary inodes immediately after the root directory, we should expect
that both of them are present and loadable, even if there isn't a
realtime volume attached.  There's no reason to skip this if rbmino ==
NULLFSINO; in fact, this causes an immediate crash if the there /is/ a
realtime volume and someone writes to it.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/xfs/xfs_rtalloc.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index 926ed314ffba1..484eb0adcefb2 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -1198,13 +1198,11 @@ xfs_rtmount_inodes(
 	xfs_sb_t	*sbp;
 
 	sbp = &mp->m_sb;
-	if (sbp->sb_rbmino == NULLFSINO)
-		return 0;
 	error = xfs_iget(mp, NULL, sbp->sb_rbmino, 0, 0, &mp->m_rbmip);
 	if (error)
 		return error;
 	ASSERT(mp->m_rbmip != NULL);
-	ASSERT(sbp->sb_rsumino != NULLFSINO);
+
 	error = xfs_iget(mp, NULL, sbp->sb_rsumino, 0, 0, &mp->m_rsumip);
 	if (error) {
 		xfs_irele(mp->m_rbmip);
-- 
2.20.1