mnt: fs_fully_visible test the proper mount for MNT_LOCKED

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commit d71ed6c930 upstream.

MNT_LOCKED implies on a child mount implies the child is locked to the
parent.  So while looping through the children the children should be
tested (not their parent).

Typically an unshare of a mount namespace locks all mounts together
making both the parent and the slave as locked but there are a few
corner cases where other things work.

Fixes: ceeb0e5d39 ("vfs: Ignore unlocked mounts in fs_fully_visible")
Reported-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

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Eric W. Biederman 2016-05-27 14:50:05 -05:00 • committed by Ben Hutchings

parent 3393778da3

commit 01add3c777

1 changed files with 1 additions and 1 deletions

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fs/namespace.c

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