use XFS_CORRUPTION_ERROR in xfs_btree_check_sblock

[mirror_ubuntu-bionic-kernel.git] / fs / xfs / xfs_fsops.c

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 8379e3bca26cb08d865a8c4cda3c7f6f1c48c276..2d0b3e1da9e69094f798967e3ff432d679249f00 100644 (file)
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -160,24 +160,32 @@ xfs_growfs_data_private(
        nagcount = new + (nb_mod != 0);
        if (nb_mod && nb_mod < XFS_MIN_AG_BLOCKS) {
                nagcount--;
-               nb = nagcount * mp->m_sb.sb_agblocks;
+               nb = (xfs_rfsblock_t)nagcount * mp->m_sb.sb_agblocks;
                if (nb < mp->m_sb.sb_dblocks)
                        return XFS_ERROR(EINVAL);
        }
        new = nb - mp->m_sb.sb_dblocks;
        oagcount = mp->m_sb.sb_agcount;
        if (nagcount > oagcount) {
+               void *new_perag, *old_perag;
+
                xfs_filestream_flush(mp);
+
+               new_perag = kmem_zalloc(sizeof(xfs_perag_t) * nagcount,
+                                       KM_MAYFAIL);
+               if (!new_perag)
+                       return XFS_ERROR(ENOMEM);
+
                down_write(&mp->m_peraglock);
-               mp->m_perag = kmem_realloc(mp->m_perag,
-                       sizeof(xfs_perag_t) * nagcount,
-                       sizeof(xfs_perag_t) * oagcount,
-                       KM_SLEEP);
-               memset(&mp->m_perag[oagcount], 0,
-                       (nagcount - oagcount) * sizeof(xfs_perag_t));
+               memcpy(new_perag, mp->m_perag, sizeof(xfs_perag_t) * oagcount);
+               old_perag = mp->m_perag;
+               mp->m_perag = new_perag;
+
                mp->m_flags |= XFS_MOUNT_32BITINODES;
                nagimax = xfs_initialize_perag(mp, nagcount);
                up_write(&mp->m_peraglock);
+
+               kmem_free(old_perag);
        }
        tp = xfs_trans_alloc(mp, XFS_TRANS_GROWFS);
        tp->t_flags |= XFS_TRANS_RESERVE;