From 3fab41ef5d68f6388ad44c82e809909acd42c850 Mon Sep 17 00:00:00 2001
From: Tomas Racek <tracek@redhat.com>
Date: Tue, 14 Aug 2012 10:35:04 +0200
Subject: [PATCH] --- yaml --- r: 322255 b: refs/heads/master c:
 a672e1be30d5bc848cd0067c55ed29b2015b7c17 h: refs/heads/master i:   322253:
 970436ea800cf4504afab23fb2e4f02a7563973f   322251:
 32d43d6c14fc8a1a9b22fdadbf3d7af4edcfb16f   322247:
 6f39879a9ea3b933cd824174ce0c8e65a3c081cc   322239:
 e326cf26eb2131367c59ae2fa93ad476a6aad983 v: v3

---
 [refs]                     | 2 +-
 trunk/fs/xfs/xfs_discard.c | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 15433b606fcc..a2ad37c134a4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 761290309939743ddf97e2bd94c6da18c6436b79
+refs/heads/master: a672e1be30d5bc848cd0067c55ed29b2015b7c17
diff --git a/trunk/fs/xfs/xfs_discard.c b/trunk/fs/xfs/xfs_discard.c
index f9c3fe304a17..69cf4fcde03e 100644
--- a/trunk/fs/xfs/xfs_discard.c
+++ b/trunk/fs/xfs/xfs_discard.c
@@ -179,12 +179,14 @@ xfs_ioc_trim(
 	 * used by the fstrim application.  In the end it really doesn't
 	 * matter as trimming blocks is an advisory interface.
 	 */
+	if (range.start >= XFS_FSB_TO_B(mp, mp->m_sb.sb_dblocks) ||
+	    range.minlen > XFS_FSB_TO_B(mp, XFS_ALLOC_AG_MAX_USABLE(mp)))
+		return -XFS_ERROR(EINVAL);
+
 	start = BTOBB(range.start);
 	end = start + BTOBBT(range.len) - 1;
 	minlen = BTOBB(max_t(u64, granularity, range.minlen));
 
-	if (XFS_BB_TO_FSB(mp, start) >= mp->m_sb.sb_dblocks)
-		return -XFS_ERROR(EINVAL);
 	if (end > XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) - 1)
 		end = XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)- 1;