diff options
Diffstat (limited to 'fs/udf/file.c')
| -rw-r--r-- | fs/udf/file.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c index 86c6743ec1fe..bb15771b92ae 100644 --- a/fs/udf/file.c +++ b/fs/udf/file.c @@ -223,11 +223,18 @@ out: static int udf_release_file(struct inode *inode, struct file *filp) { - if (filp->f_mode & FMODE_WRITE) { + if (filp->f_mode & FMODE_WRITE && + atomic_read(&inode->i_writecount) > 1) { + /* + * Grab i_mutex to avoid races with writes changing i_size + * while we are running. + */ + mutex_lock(&inode->i_mutex); down_write(&UDF_I(inode)->i_data_sem); udf_discard_prealloc(inode); udf_truncate_tail_extent(inode); up_write(&UDF_I(inode)->i_data_sem); + mutex_unlock(&inode->i_mutex); } return 0; } |