[PATCH] xfs: fix extent length after xfs_alloc_compute_diff()

[Jinliang Zheng]

After xfs_alloc_compute_diff(), the length of the candidate extent
may change, so make necessary corrections to args->len.

Signed-off-by: Jinliang Zheng <alexjlzheng@xxxxxxxxxxx>
---
 fs/xfs/libxfs/xfs_alloc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 22bdbb3e9980..6a5e6cc7a259 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -1069,6 +1069,10 @@ xfs_alloc_cur_check(
 	if (bnew == NULLAGBLOCK)
 		goto out;
 
+	args->len = XFS_EXTLEN_MIN(bnoa + lena - bnew, args->maxlen);
+	if (args->len < acur->len)
+		goto out;
+
 	/*
 	 * Deactivate a bnobt cursor with worse locality than the current best.
 	 */
-- 
2.41.1