diff options
Diffstat (limited to 'ipc/mqueue.c')
| -rw-r--r-- | ipc/mqueue.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 34262c11f48..94fd3b08fb7 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -598,6 +598,7 @@ static struct file *do_create(struct dentry *dir, struct dentry *dentry, int oflag, mode_t mode, struct mq_attr __user *u_attr) { struct mq_attr attr; + struct file *result; int ret; if (u_attr) { @@ -612,13 +613,24 @@ static struct file *do_create(struct dentry *dir, struct dentry *dentry, } mode &= ~current->fs->umask; + ret = mnt_want_write(mqueue_mnt); + if (ret) + goto out; ret = vfs_create(dir->d_inode, dentry, mode, NULL); dentry->d_fsdata = NULL; if (ret) - goto out; + goto out_drop_write; - return dentry_open(dentry, mqueue_mnt, oflag); + result = dentry_open(dentry, mqueue_mnt, oflag); + /* + * dentry_open() took a persistent mnt_want_write(), + * so we can now drop this one. + */ + mnt_drop_write(mqueue_mnt); + return result; +out_drop_write: + mnt_drop_write(mqueue_mnt); out: dput(dentry); mntput(mqueue_mnt); |