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ext4: Check for an valid i_mode when reading the inode from disk

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Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2009-03-26 00:06:19 -04:00
parent 7058548cd5
commit 563bdd61fe
1 changed files with 9 additions and 1 deletions
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10
fs/ext4/inode.c
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@@ -4394,7 +4394,8 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
inode->i_op = &ext4_symlink_inode_operations; inode->i_op = &ext4_symlink_inode_operations;
ext4_set_aops(inode); ext4_set_aops(inode);
} }
} else { } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
inode->i_op = &ext4_special_inode_operations; inode->i_op = &ext4_special_inode_operations;
if (raw_inode->i_block[0]) if (raw_inode->i_block[0])
init_special_inode(inode, inode->i_mode, init_special_inode(inode, inode->i_mode,
@@ -4402,6 +4403,13 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
else else
init_special_inode(inode, inode->i_mode, init_special_inode(inode, inode->i_mode,
new_decode_dev(le32_to_cpu(raw_inode->i_block[1]))); new_decode_dev(le32_to_cpu(raw_inode->i_block[1])));
} else {
brelse(bh);
ret = -EIO;
ext4_error(inode->i_sb, __func__,
"bogus i_mode (%o) for inode=%lu",
inode->i_mode, inode->i_ino);
goto bad_inode;
} }
brelse(iloc.bh); brelse(iloc.bh);
ext4_set_inode_flags(inode); ext4_set_inode_flags(inode);