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hc
2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/fs/ntfs/inode.c
....@@ -1,22 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /**
23  * inode.c - NTFS kernel inode handling.
34  *
45  * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
5
- *
6
- * This program/include file is free software; you can redistribute it and/or
7
- * modify it under the terms of the GNU General Public License as published
8
- * by the Free Software Foundation; either version 2 of the License, or
9
- * (at your option) any later version.
10
- *
11
- * This program/include file is distributed in the hope that it will be
12
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
13
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14
- * GNU General Public License for more details.
15
- *
16
- * You should have received a copy of the GNU General Public License
17
- * along with this program (in the main directory of the Linux-NTFS
18
- * distribution in the file COPYING); if not, write to the Free Software
19
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
206  */
217 
228 #include <linux/buffer_head.h>
....@@ -44,10 +30,10 @@
4430 /**
4531  * ntfs_test_inode - compare two (possibly fake) inodes for equality
4632  * @vi:		vfs inode which to test
47
- * @na:		ntfs attribute which is being tested with
33
+ * @data:	data which is being tested with
4834  *
4935  * Compare the ntfs attribute embedded in the ntfs specific part of the vfs
50
- * inode @vi for equality with the ntfs attribute @na.
36
+ * inode @vi for equality with the ntfs attribute @data.
5137  *
5238  * If searching for the normal file/directory inode, set @na->type to AT_UNUSED.
5339  * @na->name and @na->name_len are then ignored.
....@@ -57,8 +43,9 @@
5743  * NOTE: This function runs with the inode_hash_lock spin lock held so it is not
5844  * allowed to sleep.
5945  */
60
-int ntfs_test_inode(struct inode *vi, ntfs_attr *na)
46
+int ntfs_test_inode(struct inode *vi, void *data)
6147 {
48
+	ntfs_attr *na = (ntfs_attr *)data;
6249 	ntfs_inode *ni;
6350 
6451 	if (vi->i_ino != na->mft_no)
....@@ -86,9 +73,9 @@
8673 /**
8774  * ntfs_init_locked_inode - initialize an inode
8875  * @vi:		vfs inode to initialize
89
- * @na:		ntfs attribute which to initialize @vi to
76
+ * @data:	data which to initialize @vi to
9077  *
91
- * Initialize the vfs inode @vi with the values from the ntfs attribute @na in
78
+ * Initialize the vfs inode @vi with the values from the ntfs attribute @data in
9279  * order to enable ntfs_test_inode() to do its work.
9380  *
9481  * If initializing the normal file/directory inode, set @na->type to AT_UNUSED.
....@@ -101,8 +88,9 @@
10188  * NOTE: This function runs with the inode->i_lock spin lock held so it is not
10289  * allowed to sleep. (Hence the GFP_ATOMIC allocation.)
10390  */
104
-static int ntfs_init_locked_inode(struct inode *vi, ntfs_attr *na)
91
+static int ntfs_init_locked_inode(struct inode *vi, void *data)
10592 {
93
+	ntfs_attr *na = (ntfs_attr *)data;
10694 	ntfs_inode *ni = NTFS_I(vi);
10795 
10896 	vi->i_ino = na->mft_no;
....@@ -145,7 +133,6 @@
145133 	return 0;
146134 }
147135 
148
-typedef int (*set_t)(struct inode *, void *);
149136 static int ntfs_read_locked_inode(struct inode *vi);
150137 static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi);
151138 static int ntfs_read_locked_index_inode(struct inode *base_vi,
....@@ -178,8 +165,8 @@
178165 	na.name = NULL;
179166 	na.name_len = 0;
180167 
181
-	vi = iget5_locked(sb, mft_no, (test_t)ntfs_test_inode,
182
-			(set_t)ntfs_init_locked_inode, &na);
168
+	vi = iget5_locked(sb, mft_no, ntfs_test_inode,
169
+			ntfs_init_locked_inode, &na);
183170 	if (unlikely(!vi))
184171 		return ERR_PTR(-ENOMEM);
185172 
....@@ -239,8 +226,8 @@
239226 	na.name = name;
240227 	na.name_len = name_len;
241228 
242
-	vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode,
243
-			(set_t)ntfs_init_locked_inode, &na);
229
+	vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
230
+			ntfs_init_locked_inode, &na);
244231 	if (unlikely(!vi))
245232 		return ERR_PTR(-ENOMEM);
246233 
....@@ -294,8 +281,8 @@
294281 	na.name = name;
295282 	na.name_len = name_len;
296283 
297
-	vi = iget5_locked(base_vi->i_sb, na.mft_no, (test_t)ntfs_test_inode,
298
-			(set_t)ntfs_init_locked_inode, &na);
284
+	vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
285
+			ntfs_init_locked_inode, &na);
299286 	if (unlikely(!vi))
300287 		return ERR_PTR(-ENOMEM);
301288 
....@@ -332,21 +319,9 @@
332319 	return NULL;
333320 }
334321 
335
-static void ntfs_i_callback(struct rcu_head *head)
322
+void ntfs_free_big_inode(struct inode *inode)
336323 {
337
-	struct inode *inode = container_of(head, struct inode, i_rcu);
338324 	kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
339
-}
340
-
341
-void ntfs_destroy_big_inode(struct inode *inode)
342
-{
343
-	ntfs_inode *ni = NTFS_I(inode);
344
-
345
-	ntfs_debug("Entering.");
346
-	BUG_ON(ni->page);
347
-	if (!atomic_dec_and_test(&ni->count))
348
-		BUG();
349
-	call_rcu(&inode->i_rcu, ntfs_i_callback);
350325 }
351326 
352327 static inline ntfs_inode *ntfs_alloc_extent_inode(void)
....@@ -1854,6 +1829,13 @@
18541829 		goto err_out;
18551830 	}
18561831 
1832
+	/* Sanity check offset to the first attribute */
1833
+	if (le16_to_cpu(m->attrs_offset) >= le32_to_cpu(m->bytes_allocated)) {
1834
+		ntfs_error(sb, "Incorrect mft offset to the first attribute %u in superblock.",
1835
+			       le16_to_cpu(m->attrs_offset));
1836
+		goto err_out;
1837
+	}
1838
+
18571839 	/* Need this to sanity check attribute list references to $MFT. */
18581840 	vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
18591841 
....@@ -1906,6 +1888,10 @@
19061888 		}
19071889 		/* Now allocate memory for the attribute list. */
19081890 		ni->attr_list_size = (u32)ntfs_attr_size(a);
1891
+		if (!ni->attr_list_size) {
1892
+			ntfs_error(sb, "Attr_list_size is zero");
1893
+			goto put_err_out;
1894
+		}
19091895 		ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
19101896 		if (!ni->attr_list) {
19111897 			ntfs_error(sb, "Not enough memory to allocate buffer "
....@@ -2299,6 +2285,9 @@
22992285 			ni->ext.base_ntfs_ino = NULL;
23002286 		}
23012287 	}
2288
+	BUG_ON(ni->page);
2289
+	if (!atomic_dec_and_test(&ni->count))
2290
+		BUG();
23022291 	return;
23032292 }
23042293 
....@@ -2935,14 +2924,11 @@
29352924 		}
29362925 	}
29372926 	if (ia_valid & ATTR_ATIME)
2938
-		vi->i_atime = timespec64_trunc(attr->ia_atime,
2939
-					       vi->i_sb->s_time_gran);
2927
+		vi->i_atime = attr->ia_atime;
29402928 	if (ia_valid & ATTR_MTIME)
2941
-		vi->i_mtime = timespec64_trunc(attr->ia_mtime,
2942
-					       vi->i_sb->s_time_gran);
2929
+		vi->i_mtime = attr->ia_mtime;
29432930 	if (ia_valid & ATTR_CTIME)
2944
-		vi->i_ctime = timespec64_trunc(attr->ia_ctime,
2945
-					       vi->i_sb->s_time_gran);
2931
+		vi->i_ctime = attr->ia_ctime;
29462932 	mark_inode_dirty(vi);
29472933 out:
29482934 	return err;