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dlm: fix pending remove if msg allocation fails 

[ Upstream commit ba58995909 ]

This patch unsets ls_remove_len and ls_remove_name if a message
allocation of a remove messages fails. In this case we never send a
remove message out but set the per ls ls_remove_len ls_remove_name
variable for a pending remove. Unset those variable should indicate
possible waiters in wait_pending_remove() that no pending remove is
going on at this moment.

Cc: stable@vger.kernel.org
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexander Aring 2022-04-06 13:34:16 -04:00 committed by Greg Kroah-Hartman
parent 0ec74f56de
commit 5f2d2c2af1
1 changed files with 2 additions and 1 deletions
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3
fs/dlm/lock.c
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@ -4085,13 +4085,14 @@ static void send_repeat_remove(struct dlm_ls *ls, char *ms_name, int len)
rv = _create_message(ls, sizeof(struct dlm_message) + len,
dir_nodeid, DLM_MSG_REMOVE, &ms, &mh);
if (rv)
return;
goto out;
memcpy(ms->m_extra, name, len);
ms->m_hash = hash;
send_message(mh, ms);
out:
spin_lock(&ls->ls_remove_spin);
ls->ls_remove_len = 0;
memset(ls->ls_remove_name, 0, DLM_RESNAME_MAXLEN);