From f598f9f1252b33410ffc52f51e117645ac5116c4 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 23 Jan 2010 20:08:53 -0500 Subject: [PATCH] Sanitize autofs_dev_ioctl_ismountpoint() Signed-off-by: Al Viro --- fs/autofs4/dev-ioctl.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c index 00bf8fc..c8a80df 100644 --- a/fs/autofs4/dev-ioctl.c +++ b/fs/autofs4/dev-ioctl.c @@ -544,10 +544,9 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp, goto out; devid = new_encode_dev(path.mnt->mnt_sb->s_dev); err = 0; - if (path.dentry->d_inode && - path.mnt->mnt_root == path.dentry) { + if (path.mnt->mnt_root == path.dentry) { err = 1; - magic = path.dentry->d_inode->i_sb->s_magic; + magic = path.mnt->mnt_sb->s_magic; } } else { dev_t dev = sbi->sb->s_dev; @@ -560,10 +559,8 @@ static int autofs_dev_ioctl_ismountpoint(struct file *fp, err = have_submounts(path.dentry); - if (path.mnt->mnt_mountpoint != path.mnt->mnt_root) { - if (follow_down(&path)) - magic = path.mnt->mnt_sb->s_magic; - } + if (follow_down(&path)) + magic = path.mnt->mnt_sb->s_magic; } param->ismountpoint.out.devid = devid; -- 2.7.4