dlm: fix error if active rsb is not hashed

commit a3672304abf2a847ac0c54c84842c64c5bfba279 upstream.

If an active rsb is not hashed anymore and this could occur because we
releases and acquired locks we need to signal the followed code that
the lookup failed. Since the lookup was successful, but it isn't part of
the rsb hash anymore we need to signal it by setting error to -EBADR as
dlm_search_rsb_tree() does it.

Cc: stable@vger.kernel.org
Fixes: 5be323b0c64d ("dlm: move dlm_search_rsb_tree() out of lock")
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index baaeaa85a7f44d649a8d9ee05d72026a2eedaada..0ad496ceb638d27ea4d30fad4a47af3d4a46ecc3 100644 (file)
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -741,6 +741,7 @@ static int find_rsb_dir(struct dlm_ls *ls, const void *name, int len,
        read_lock_bh(&ls->ls_rsbtbl_lock);
        if (!rsb_flag(r, RSB_HASHED)) {
                read_unlock_bh(&ls->ls_rsbtbl_lock);
+               error = -EBADR;
                goto do_new;
        }