add lvds1024*800

hc

2024-01-31 f70575805708cabdedea7498aaa3f710fde4d920

 kernel/fs/quota/quota_tree.c
..
..
@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
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2
 /*
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  *	vfsv0 quota IO operations on file
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4
  */
..
..
@@ -79,6 +80,35 @@
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 	return ret;
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 }
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82
 
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+static inline int do_check_range(struct super_block *sb, const char *val_name,
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+				 uint val, uint min_val, uint max_val)
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+{
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+	if (val < min_val || val > max_val) {
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+		quota_error(sb, "Getting %s %u out of range %u-%u",
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+			    val_name, val, min_val, max_val);
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+		return -EUCLEAN;
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+	}
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+
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+	return 0;
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+}
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+
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+static int check_dquot_block_header(struct qtree_mem_dqinfo *info,
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+				    struct qt_disk_dqdbheader *dh)
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+{
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+	int err = 0;
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+
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+	err = do_check_range(info->dqi_sb, "dqdh_next_free",
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+			     le32_to_cpu(dh->dqdh_next_free), 0,
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+			     info->dqi_blocks - 1);
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+	if (err)
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+		return err;
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+	err = do_check_range(info->dqi_sb, "dqdh_prev_free",
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+			     le32_to_cpu(dh->dqdh_prev_free), 0,
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+			     info->dqi_blocks - 1);
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+
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+	return err;
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+}
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+
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 /* Remove empty block from list and return it */
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113
 static int get_free_dqblk(struct qtree_mem_dqinfo *info)
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 {
..
..
@@ -92,6 +122,9 @@
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 		blk = info->dqi_free_blk;
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 		ret = read_blk(info, blk, buf);
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 		if (ret < 0)
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+			goto out_buf;
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+		ret = check_dquot_block_header(info, dh);
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+		if (ret)
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128
 			goto out_buf;
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 		info->dqi_free_blk = le32_to_cpu(dh->dqdh_next_free);
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130
 	}
..
..
@@ -239,6 +272,9 @@
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 		blk = info->dqi_free_entry;
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 		*err = read_blk(info, blk, buf);
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 		if (*err < 0)
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+			goto out_buf;
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+		*err = check_dquot_block_header(info, dh);
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+		if (*err)
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 			goto out_buf;
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 	} else {
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 		blk = get_free_dqblk(info);
..
..
@@ -432,6 +468,9 @@
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 		goto out_buf;
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 	}
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 	dh = (struct qt_disk_dqdbheader *)buf;
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+	ret = check_dquot_block_header(info, dh);
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+	if (ret)
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+		goto out_buf;
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 	le16_add_cpu(&dh->dqdh_entries, -1);
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 	if (!le16_to_cpu(dh->dqdh_entries)) {	/* Block got free? */
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 		ret = remove_free_dqentry(info, buf, blk);