fs: devpts_pty_new() return -ENOMEM if dentry allocation failed
In this case nobody can open a slave point, so will be better return from devpts_pty_new() Now we should not check error code from d_find_alias() in devpts_pty_kill(), because the dentry exists all times. Signed-off-by: Andrey Vagin <avagin@openvz.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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1c34092adf
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1 changed files with 9 additions and 10 deletions
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@ -479,6 +479,7 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
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struct dentry *root = sb->s_root;
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struct dentry *root = sb->s_root;
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struct pts_fs_info *fsi = DEVPTS_SB(sb);
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struct pts_fs_info *fsi = DEVPTS_SB(sb);
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struct pts_mount_opts *opts = &fsi->mount_opts;
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struct pts_mount_opts *opts = &fsi->mount_opts;
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int ret = 0;
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char s[12];
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char s[12];
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/* We're supposed to be given the slave end of a pty */
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/* We're supposed to be given the slave end of a pty */
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@ -504,11 +505,14 @@ int devpts_pty_new(struct inode *ptmx_inode, struct tty_struct *tty)
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if (!IS_ERR(dentry)) {
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if (!IS_ERR(dentry)) {
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d_add(dentry, inode);
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d_add(dentry, inode);
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fsnotify_create(root->d_inode, dentry);
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fsnotify_create(root->d_inode, dentry);
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} else {
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iput(inode);
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ret = -ENOMEM;
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}
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}
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mutex_unlock(&root->d_inode->i_mutex);
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mutex_unlock(&root->d_inode->i_mutex);
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return 0;
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return ret;
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}
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}
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struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
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struct tty_struct *devpts_get_tty(struct inode *pts_inode, int number)
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@ -544,17 +548,12 @@ void devpts_pty_kill(struct tty_struct *tty)
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mutex_lock(&root->d_inode->i_mutex);
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mutex_lock(&root->d_inode->i_mutex);
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dentry = d_find_alias(inode);
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dentry = d_find_alias(inode);
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if (IS_ERR(dentry))
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goto out;
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if (dentry) {
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inode->i_nlink--;
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inode->i_nlink--;
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d_delete(dentry);
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d_delete(dentry);
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dput(dentry); /* d_alloc_name() in devpts_pty_new() */
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dput(dentry); /* d_alloc_name() in devpts_pty_new() */
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}
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dput(dentry); /* d_find_alias above */
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dput(dentry); /* d_find_alias above */
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out:
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mutex_unlock(&root->d_inode->i_mutex);
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mutex_unlock(&root->d_inode->i_mutex);
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}
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}
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