ceph: fix unsafe dcache access in ceph_encode_dentry_release

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Accessing d_parent requires some sort of locking or it could vanish
out from under us. Since we take the d_lock anyway, use that to fetch
d_parent and take a reference to it, and then use that reference to
call ceph_encode_inode_release.

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>

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Jeff Layton 2016-12-15 08:37:58 -05:00 • committed by Ilya Dryomov

parent fd36a71762

commit adf0d68701

1 changed files with 5 additions and 2 deletions

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fs/ceph/caps.c

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