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authorJan Kara <jack@suse.cz>2011-12-18 17:37:02 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-05-21 09:40:04 -0700
commit1a28fbbebe6bd7e3f0338663302b3b3ce500e088 (patch)
tree98279af6779360496ef7a93e6e85f03a25026dbc /fs/ext4
parent8e8a21270cbfc41bf3bf2e014b99dc113ba554ec (diff)
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ext4: fix error handling on inode bitmap corruption
commit acd6ad83517639e8f09a8c5525b1dccd81cd2a10 upstream. When insert_inode_locked() fails in ext4_new_inode() it most likely means inode bitmap got corrupted and we allocated again inode which is already in use. Also doing unlock_new_inode() during error recovery is wrong since the inode does not have I_NEW set. Fix the problem by jumping to fail: (instead of fail_drop:) which declares filesystem error and does not call unlock_new_inode(). Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ialloc.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 21bb2f6..412469b 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -1021,8 +1021,12 @@ got:
if (IS_DIRSYNC(inode))
ext4_handle_sync(handle);
if (insert_inode_locked(inode) < 0) {
- err = -EINVAL;
- goto fail_drop;
+ /*
+ * Likely a bitmap corruption causing inode to be allocated
+ * twice.
+ */
+ err = -EIO;
+ goto fail;
}
spin_lock(&sbi->s_next_gen_lock);
inode->i_generation = sbi->s_next_generation++;