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| author | Jeff Layton <jlayton@redhat.com> | 2016-12-15 13:37:57 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-10-21 15:21:37 (GMT) |
| commit | bd530852210d9a9bb96cb4c08adc13a6b116c75e (patch) | |
| tree | b929752717d18622e5baf9954095f1538a603a1d /include | |
| parent | 6839ad59f9d5058b3b7e2c608b4a9d08619134a3 (diff) | |
| download | linux-bd530852210d9a9bb96cb4c08adc13a6b116c75e.tar.xz | |
ceph: clean up unsafe d_parent accesses in build_dentry_path
[ Upstream commit c6b0b656ca24ede6657abb4a2cd910fa9c1879ba ]
While we hold a reference to the dentry when build_dentry_path is
called, we could end up racing with a rename that changes d_parent.
Handle that situation correctly, by using the rcu_read_lock to
ensure that the parent dentry and inode stick around long enough
to safely check ceph_snap and ceph_ino.
Link: http://tracker.ceph.com/issues/18148
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Yan, Zheng <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions