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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/nilfs2/dat.c
..
..
@@ -111,6 +111,13 @@
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 	kunmap_atomic(kaddr);
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 	nilfs_dat_commit_entry(dat, req);
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+
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+	if (unlikely(req->pr_desc_bh == NULL || req->pr_bitmap_bh == NULL)) {
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+		nilfs_error(dat->i_sb,
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+			    "state inconsistency probably due to duplicate use of vblocknr = %llu",
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+			    (unsigned long long)req->pr_entry_nr);
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+		return;
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+	}
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 	nilfs_palloc_commit_free_entry(dat, req);
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 }
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@@ -340,11 +347,11 @@
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 	kaddr = kmap_atomic(entry_bh->b_page);
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 	entry = nilfs_palloc_block_get_entry(dat, vblocknr, entry_bh, kaddr);
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 	if (unlikely(entry->de_blocknr == cpu_to_le64(0))) {
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-		nilfs_msg(dat->i_sb, KERN_CRIT,
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-			  "%s: invalid vblocknr = %llu, [%llu, %llu)",
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-			  __func__, (unsigned long long)vblocknr,
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-			  (unsigned long long)le64_to_cpu(entry->de_start),
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-			  (unsigned long long)le64_to_cpu(entry->de_end));
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+		nilfs_crit(dat->i_sb,
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+			   "%s: invalid vblocknr = %llu, [%llu, %llu)",
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+			   __func__, (unsigned long long)vblocknr,
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+			   (unsigned long long)le64_to_cpu(entry->de_start),
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+			   (unsigned long long)le64_to_cpu(entry->de_end));
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 		kunmap_atomic(kaddr);
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 		brelse(entry_bh);
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 		return -EINVAL;
..
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@@ -471,11 +478,11 @@
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 	int err;
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 	if (entry_size > sb->s_blocksize) {
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-		nilfs_msg(sb, KERN_ERR, "too large DAT entry size: %zu bytes",
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+		nilfs_err(sb, "too large DAT entry size: %zu bytes",
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 			  entry_size);
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 		return -EINVAL;
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 	} else if (entry_size < NILFS_MIN_DAT_ENTRY_SIZE) {
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-		nilfs_msg(sb, KERN_ERR, "too small DAT entry size: %zu bytes",
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+		nilfs_err(sb, "too small DAT entry size: %zu bytes",
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 			  entry_size);
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 		return -EINVAL;
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 	}
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@@ -497,7 +504,9 @@
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 	di = NILFS_DAT_I(dat);
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 	lockdep_set_class(&di->mi.mi_sem, &dat_lock_key);
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 	nilfs_palloc_setup_cache(dat, &di->palloc_cache);
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-	nilfs_mdt_setup_shadow_map(dat, &di->shadow);
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+	err = nilfs_mdt_setup_shadow_map(dat, &di->shadow);
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+	if (err)
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+		goto failed;
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 	err = nilfs_read_inode_common(dat, raw_inode);
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 	if (err)