Commit 27d55f1f authored Jan 16, 2010 by Al Viro

do_add_mount() should sanitize mnt_flags



MNT_WRITE_HOLD shouldn't leak into new vfsmount and neither
should MNT_SHARED (the latter will be set properly, along with
the rest of shared-subtree data structures)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 7e1295d9

fs/namespace.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1671,6 +1671,8 @@ int do_add_mount(struct vfsmount newmnt, struct path path,
		{
		int err;

		mnt_flags &= ~(MNT_SHARED \| MNT_WRITE_HOLD);

		down_write(&namespace_sem);
		/* Something was mounted here while we slept */
		while (d_mountpoint(path->dentry) &&