diff options
| author | Theodore Ts'o <tytso@mit.edu> | 2017-02-04 23:04:00 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-12 06:37:27 +0100 |
| commit | 6ec4583e9b03f64166902b4b4d8301d0f62b49bc (patch) | |
| tree | 3f922dcc494dfb1158689bb229ad533beb956da9 | |
| parent | 9d636818dbac53c07c1bf7aa006c06ec32253187 (diff) | |
ext4: fix inline data error paths
commit eb5efbcb762aee4b454b04f7115f73ccbcf8f0ef upstream.
The write_end() function must always unlock the page and drop its ref
count, even on an error.
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/ext4/inline.c | 9 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 20 |
2 files changed, 23 insertions, 6 deletions
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c index 8968a93e2150..d4be4e23bc21 100644 --- a/fs/ext4/inline.c +++ b/fs/ext4/inline.c @@ -933,8 +933,15 @@ int ext4_da_write_inline_data_end(struct inode *inode, loff_t pos, struct page *page) { int i_size_changed = 0; + int ret; - copied = ext4_write_inline_data_end(inode, pos, len, copied, page); + ret = ext4_write_inline_data_end(inode, pos, len, copied, page); + if (ret < 0) { + unlock_page(page); + put_page(page); + return ret; + } + copied = ret; /* * No need to use i_size_read() here, the i_size diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 88ae0aaa49d1..e0f862146793 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1165,8 +1165,11 @@ static int ext4_write_end(struct file *file, if (ext4_has_inline_data(inode)) { ret = ext4_write_inline_data_end(inode, pos, len, copied, page); - if (ret < 0) + if (ret < 0) { + unlock_page(page); + put_page(page); goto errout; + } copied = ret; } else copied = block_write_end(file, mapping, pos, @@ -1268,10 +1271,16 @@ static int ext4_journalled_write_end(struct file *file, BUG_ON(!ext4_handle_valid(handle)); - if (ext4_has_inline_data(inode)) - copied = ext4_write_inline_data_end(inode, pos, len, - copied, page); - else if (unlikely(copied < len) && !PageUptodate(page)) { + if (ext4_has_inline_data(inode)) { + ret = ext4_write_inline_data_end(inode, pos, len, + copied, page); + if (ret < 0) { + unlock_page(page); + put_page(page); + goto errout; + } + copied = ret; + } else if (unlikely(copied < len) && !PageUptodate(page)) { copied = 0; ext4_journalled_zero_new_buffers(handle, page, from, to); } else { @@ -1306,6 +1315,7 @@ static int ext4_journalled_write_end(struct file *file, */ ext4_orphan_add(handle, inode); +errout: ret2 = ext4_journal_stop(handle); if (!ret) ret = ret2; |