[XFS] Prevent data corruption on extending truncate case from cxfs client

SGI-PV: 942439
SGI-Modid: xfs-linux:xfs-kern:200152a

Signed-off-by: Eric Sandeen <sandeen@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 5bf9b2a0b57c..b564c1b25e5e 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -626,8 +626,10 @@ xfs_setattr(
          */
         if (mask & XFS_AT_SIZE) {
                 code = 0;
-                if (vap->va_size > ip->i_d.di_size)
+                if ((vap->va_size > ip->i_d.di_size) && 
+                    (flags & ATTR_NOSIZETOK) == 0) {
                         code = xfs_igrow_start(ip, vap->va_size, credp);
+                }
                 xfs_iunlock(ip, XFS_ILOCK_EXCL);
                 if (!code)
                         code = xfs_itruncate_data(ip, vap->va_size);