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-rw-r--r--fs/xfs/libxfs/xfs_ialloc.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 04377ab75863..588d44613094 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -2787,8 +2787,13 @@ xfs_ialloc_setup_geometry(
igeo->inobt_maxlevels = xfs_btree_compute_maxlevels(igeo->inobt_mnr,
inodes);
- /* Set the maximum inode count for this filesystem. */
- if (sbp->sb_imax_pct) {
+ /*
+ * Set the maximum inode count for this filesystem, being careful not
+ * to use obviously garbage sb_inopblog/sb_inopblock values. Regular
+ * users should never get here due to failing sb verification, but
+ * certain users (xfs_db) need to be usable even with corrupt metadata.
+ */
+ if (sbp->sb_imax_pct && igeo->ialloc_blks) {
/*
* Make sure the maximum inode count is a multiple
* of the units we allocate inodes in.