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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-05-30 06:03:48 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-06-09 19:36:12 +0400 |
| commit | 15de0eade174f9aade57a4080f1bac1a36e45e83 (patch) | |
| tree | 3351b21436f75bbd3cfc83cfde55cff18da3384f /fs | |
| parent | 75df3ae2060eb00b909ac65fc4d2798c4e53969a (diff) | |
| download | linux-15de0eade174f9aade57a4080f1bac1a36e45e83.tar.xz | |
vfs: umount_tree() might be called on subtree that had never made it
commit 63d37a84ab6004c235314ffd7a76c5eb28c2fae0 upstream.
__mnt_make_shortterm() in there undoes the effect of __mnt_make_longterm()
we'd done back when we set ->mnt_ns non-NULL; it should not be done to
vfsmounts that had never gone through commit_tree() and friends. Kudos to
lczerner for catching that one...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/namespace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index e6081996c9a2..4e465397e456 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1073,8 +1073,9 @@ void umount_tree(struct mount *mnt, int propagate, struct list_head *kill) list_del_init(&p->mnt_expire); list_del_init(&p->mnt_list); __touch_mnt_namespace(p->mnt_ns); + if (p->mnt_ns) + __mnt_make_shortterm(p); p->mnt_ns = NULL; - __mnt_make_shortterm(p); list_del_init(&p->mnt_child); if (mnt_has_parent(p)) { p->mnt_parent->mnt_ghosts++; |