6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Chao Yu <chao@xxxxxxxxxx>
commit 96cfeb0389530ae32ade8a48ae3ae1ac3b6c009d upstream.
It should wait all existing dio write IOs before block removal,
otherwise, previous direct write IO may overwrite data in the
block which may be reused by other inode.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Chao Yu <chao@xxxxxxxxxx>
Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/f2fs/file.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -1055,6 +1055,13 @@ int f2fs_setattr(struct mnt_idmap *idmap
return err;
}
+ /*
+ * wait for inflight dio, blocks should be removed after
+ * IO completion.
+ */
+ if (attr->ia_size < old_size)
+ inode_dio_wait(inode);
+
f2fs_down_write(&fi->i_gc_rwsem[WRITE]);
filemap_invalidate_lock(inode->i_mapping);
@@ -1891,6 +1898,12 @@ static long f2fs_fallocate(struct file *
if (ret)
goto out;
+ /*
+ * wait for inflight dio, blocks should be removed after IO
+ * completion.
+ */
+ inode_dio_wait(inode);
+
if (mode & FALLOC_FL_PUNCH_HOLE) {
if (offset >= inode->i_size)
goto out;
