summaryrefslogtreecommitdiff
path: root/fs
diff options
context:
space:
mode:
authorTheodore Ts'o <tytso@mit.edu>2017-02-04 23:04:00 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-03-12 06:37:27 +0100
commit6ec4583e9b03f64166902b4b4d8301d0f62b49bc (patch)
tree3f922dcc494dfb1158689bb229ad533beb956da9 /fs
parent9d636818dbac53c07c1bf7aa006c06ec32253187 (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>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext4/inline.c9
-rw-r--r--fs/ext4/inode.c20
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;