Hello I tried the unprivileged mount v5 patches with 2.6.21.1. I made some experiments with normal filesystems (ext3, xfs, iso9660). I removed the FS_SAFE checks for that.
Mounting and umounting as unprivileged user (user1) works, e.g. (/mnt/user1 is a mount owned by user1) [EMAIL PROTECTED] ~]$ mmount -t xfs /dev/mapper/vg00-test /mnt/user1 But the device permissions are ignored. The unprivileged user can mount the block device even there are no permissions to access it: brw------- 1 root root 253, 5 Apr 29 18:32 /dev/mapper/vg00-test And there is another problem with sharing the device (superblock?). If user1 mount a device readonly: [EMAIL PROTECTED] ~]$ mmount -r -t xfs /dev/mapper/vg00-test /mnt/user1 Than root cannot mount the device rw: [EMAIL PROTECTED] ~]# mount /dev/mapper/vg00-test /mnt/test/ mount: /dev/mapper/vg00-test already mounted or /mnt/test/ busy Mounting ro works and than remounting rw work. But than /mnt/user1 is rw too. This can DoS e.g. the automounter mounting /dev/mapper/vg00-test rw. utz - 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/
