修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/fs/ext4/fast_commit.c
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@@ -66,7 +66,7 @@
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  * Fast Commit Ineligibility
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  * -------------------------
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  * Not all operations are supported by fast commits today (e.g extended
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- * attributes). Fast commit ineligiblity is marked by calling one of the
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+ * attributes). Fast commit ineligibility is marked by calling one of the
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  * two following functions:
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  *
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  * - ext4_fc_mark_ineligible(): This makes next fast commit operation to fall
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@@ -371,25 +371,33 @@
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 	struct __track_dentry_update_args *dentry_update =
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 		(struct __track_dentry_update_args *)arg;
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 	struct dentry *dentry = dentry_update->dentry;
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-	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
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+	struct inode *dir = dentry->d_parent->d_inode;
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+	struct super_block *sb = inode->i_sb;
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+	struct ext4_sb_info *sbi = EXT4_SB(sb);
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 	mutex_unlock(&ei->i_fc_lock);
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+
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+	if (IS_ENCRYPTED(dir)) {
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+		ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_ENCRYPTED_FILENAME);
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+		mutex_lock(&ei->i_fc_lock);
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+		return -EOPNOTSUPP;
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+	}
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+
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 	node = kmem_cache_alloc(ext4_fc_dentry_cachep, GFP_NOFS);
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 	if (!node) {
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-		ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_NOMEM);
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+		ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_NOMEM);
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 		mutex_lock(&ei->i_fc_lock);
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 		return -ENOMEM;
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 	}
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 	node->fcd_op = dentry_update->op;
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-	node->fcd_parent = dentry->d_parent->d_inode->i_ino;
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+	node->fcd_parent = dir->i_ino;
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 	node->fcd_ino = inode->i_ino;
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 	if (dentry->d_name.len > DNAME_INLINE_LEN) {
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 		node->fcd_name.name = kmalloc(dentry->d_name.len, GFP_NOFS);
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 		if (!node->fcd_name.name) {
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 			kmem_cache_free(ext4_fc_dentry_cachep, node);
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-			ext4_fc_mark_ineligible(inode->i_sb,
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-				EXT4_FC_REASON_NOMEM);
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+			ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_NOMEM);
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 			mutex_lock(&ei->i_fc_lock);
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 			return -ENOMEM;
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 		}
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@@ -628,6 +636,9 @@
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 		*crc = ext4_chksum(sbi, *crc, tl, sizeof(*tl));
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 	if (pad_len > 0)
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 		ext4_fc_memzero(sb, tl + 1, pad_len, crc);
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+	/* Don't leak uninitialized memory in the unused last byte. */
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+	*((u8 *)(tl + 1) + pad_len) = 0;
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+
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 	ext4_fc_submit_bh(sb);
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 	ret = jbd2_fc_get_buf(EXT4_SB(sb)->s_journal, &bh);
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@@ -684,6 +695,8 @@
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 	dst += sizeof(tail.fc_tid);
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 	tail.fc_crc = cpu_to_le32(crc);
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 	ext4_fc_memcpy(sb, dst, &tail.fc_crc, sizeof(tail.fc_crc), NULL);
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+	dst += sizeof(tail.fc_crc);
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+	memset(dst, 0, bsize - off); /* Don't leak uninitialized memory. */
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 	ext4_fc_submit_bh(sb);
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@@ -1287,7 +1300,7 @@
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 		return 0;
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 	}
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-	ret = __ext4_unlink(NULL, old_parent, &entry, inode);
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+	ret = __ext4_unlink(old_parent, &entry, inode, NULL);
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 	/* -ENOENT ok coz it might not exist anymore. */
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 	if (ret == -ENOENT)
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 		ret = 0;
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@@ -2137,17 +2150,17 @@
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 	journal->j_fc_cleanup_callback = ext4_fc_cleanup;
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 }
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-static const char *fc_ineligible_reasons[] = {
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-	"Extended attributes changed",
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-	"Cross rename",
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-	"Journal flag changed",
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-	"Insufficient memory",
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-	"Swap boot",
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-	"Resize",
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-	"Dir renamed",
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-	"Falloc range op",
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-	"Data journalling",
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-	"FC Commit Failed"
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+static const char * const fc_ineligible_reasons[] = {
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+	[EXT4_FC_REASON_XATTR] = "Extended attributes changed",
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+	[EXT4_FC_REASON_CROSS_RENAME] = "Cross rename",
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+	[EXT4_FC_REASON_JOURNAL_FLAG_CHANGE] = "Journal flag changed",
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+	[EXT4_FC_REASON_NOMEM] = "Insufficient memory",
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+	[EXT4_FC_REASON_SWAP_BOOT] = "Swap boot",
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+	[EXT4_FC_REASON_RESIZE] = "Resize",
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+	[EXT4_FC_REASON_RENAME_DIR] = "Dir renamed",
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+	[EXT4_FC_REASON_FALLOC_RANGE] = "Falloc range op",
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+	[EXT4_FC_REASON_INODE_JOURNAL_DATA] = "Data journalling",
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+	[EXT4_FC_REASON_ENCRYPTED_FILENAME] = "Encrypted filename",
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 };
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 int ext4_fc_info_show(struct seq_file *seq, void *v)