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authorAl Viro <viro@zeniv.linux.org.uk>2010-01-23 20:08:53 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2010-03-03 14:07:53 -0500
commitf598f9f1252b33410ffc52f51e117645ac5116c4 (patch)
tree78191ec2ccdf725c5fa8a8f23828c4761abe84ed /fs/autofs4/dev-ioctl.c
parentb1e4594ba097634e9436cc4c6ba95f70a2d627ff (diff)
Sanitize autofs_dev_ioctl_ismountpoint()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/autofs4/dev-ioctl.c')
-rw-r--r--fs/autofs4/dev-ioctl.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c
index 00bf8fcb245..c8a80dffb45 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;