4.0-stable review patch. If anyone has any objections, please let me know.
------------------ From: "Eric W. Biederman" <[email protected]> commit 7e96c1b0e0f495c5a7450dc4aa7c9a24ba4305bd upstream. This fixes a dumb bug in fs_fully_visible that allows proc or sys to be mounted if there is a bind mount of part of /proc/ or /sys/ visible. Reported-by: Eric Windisch <[email protected]> Signed-off-by: "Eric W. Biederman" <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/namespace.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/fs/namespace.c +++ b/fs/namespace.c @@ -3178,6 +3178,12 @@ bool fs_fully_visible(struct file_system if (mnt->mnt.mnt_sb->s_type != type) continue; + /* This mount is not fully visible if it's root directory + * is not the root directory of the filesystem. + */ + if (mnt->mnt.mnt_root != mnt->mnt.mnt_sb->s_root) + continue; + /* This mount is not fully visible if there are any child mounts * that cover anything except for empty directories. */ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
