From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D061E9443 for ; Sun, 13 Aug 2023 21:21:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5849EC433C7; Sun, 13 Aug 2023 21:21:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1691961671; bh=zFFsrbhx1BJZq/FFlq1yZ9Aw/h9KAda7+x7fXBA50lg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ffB4XW6FjvEcFFzqyyqQlqKbjNTF02wxqqD9mUpmw3AT1dQOzWnfp/CEnxE0/ja2T sxMJGqa3I79igzvrt6OEv+hYkcZ4rHUvg6HRHbuW+0ql01TuLGWBGUnN49WxVQNev7 e4sxbl5zx44VT6CHH4fUCSCUgGSEFu5AeR8cL8Oo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Douglas Miller , Dennis Dalessandro , Leon Romanovsky Subject: [PATCH 4.14 18/26] IB/hfi1: Fix possible panic during hotplug remove Date: Sun, 13 Aug 2023 23:19:11 +0200 Message-ID: <20230813211703.664570678@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230813211702.980427106@linuxfoundation.org> References: <20230813211702.980427106@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Douglas Miller commit 4fdfaef71fced490835145631a795497646f4555 upstream. During hotplug remove it is possible that the update counters work might be pending, and may run after memory has been freed. Cancel the update counters work before freeing memory. Fixes: 7724105686e7 ("IB/hfi1: add driver files") Signed-off-by: Douglas Miller Signed-off-by: Dennis Dalessandro Link: https://lore.kernel.org/r/169099756100.3927190.15284930454106475280.stgit@awfm-02.cornelisnetworks.com Signed-off-by: Leon Romanovsky Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/hfi1/chip.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/infiniband/hw/hfi1/chip.c +++ b/drivers/infiniband/hw/hfi1/chip.c @@ -12141,6 +12141,7 @@ static void free_cntrs(struct hfi1_devda if (dd->synth_stats_timer.data) del_timer_sync(&dd->synth_stats_timer); + cancel_work_sync(&dd->update_cntr_work); dd->synth_stats_timer.data = 0; ppd = (struct hfi1_pportdata *)(dd + 1); for (i = 0; i < dd->num_pports; i++, ppd++) {