Bug#450895: busybox: 'mount --rbind' fails to recursively mount submounts

[Frans Pop <elendil@planet.nl>]

Package: busybox
Version: 1:1.1.3-5

# mkdir test1
# echo foo >test1/foo
# mkdir -p test2/test
# mount --bind test1 test2/test
# ls test2/test
foo
# mkdir -p test3/test
# mount --rbind test2 test3/test
# ls test3/test/test
#

The last command should also have listed 'foo', but mount failed to 
recursively mount test2/test (i.e. test1) to test3/test/test.

The same sequence done using mount from util-linux-ng results in:
# cat /proc/mounts | grep test
/dev/sda1 /mnt/test2/test ext3 rw,relatime,data=ordered 0 0
/dev/sda1 /mnt/test3/test ext3 rw,relatime,data=ordered 0 0
/dev/sda1 /mnt/test3/test/test ext3 rw,relatime,data=ordered 0 0

Using busybox mount the last line is missing.

Attachment: signature.asc
Description: This is a digitally signed message part.