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 149085103A; Mon, 11 Dec 2023 18:49:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Z7FVA1p2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2EB30C433C7; Mon, 11 Dec 2023 18:49:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1702320561; bh=HX/WtPygJxqdxTZsL6/J2gODpq8CHdAM38n8zzuFkFA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z7FVA1p2CC9y4an4Qn5aEjiueqftit4XE2l5H6fEdxEoBbsksDrpwOmfMqAOaVd5v UXdU+FB5Hz3VDhIm/U2H3MhE/MQSXgttVu+8rFICT6MaqAH4jx0cBR1xcuu4uvcpcc Xz5M3vpdUHU1pyF+UGnSa9c3fJZkbxbuRkxhKduw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shifeng Li , Shiraz Saleem , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.1 079/194] RDMA/irdma: Fix UAF in irdma_sc_ccq_get_cqe_info() Date: Mon, 11 Dec 2023 19:21:09 +0100 Message-ID: <20231211182040.016362506@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231211182036.606660304@linuxfoundation.org> References: <20231211182036.606660304@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shifeng Li [ Upstream commit 2b78832f50c4d711e161b166d7d8790968051546 ] When removing the irdma driver or unplugging its aux device, the ccq queue is released before destorying the cqp_cmpl_wq queue. But in the window, there may still be completion events for wqes. That will cause a UAF in irdma_sc_ccq_get_cqe_info(). [34693.333191] BUG: KASAN: use-after-free in irdma_sc_ccq_get_cqe_info+0x82f/0x8c0 [irdma] [34693.333194] Read of size 8 at addr ffff889097f80818 by task kworker/u67:1/26327 [34693.333194] [34693.333199] CPU: 9 PID: 26327 Comm: kworker/u67:1 Kdump: loaded Tainted: G O --------- -t - 4.18.0 #1 [34693.333200] Hardware name: SANGFOR Inspur/NULL, BIOS 4.1.13 08/01/2016 [34693.333211] Workqueue: cqp_cmpl_wq cqp_compl_worker [irdma] [34693.333213] Call Trace: [34693.333220] dump_stack+0x71/0xab [34693.333226] print_address_description+0x6b/0x290 [34693.333238] ? irdma_sc_ccq_get_cqe_info+0x82f/0x8c0 [irdma] [34693.333240] kasan_report+0x14a/0x2b0 [34693.333251] irdma_sc_ccq_get_cqe_info+0x82f/0x8c0 [irdma] [34693.333264] ? irdma_free_cqp_request+0x151/0x1e0 [irdma] [34693.333274] irdma_cqp_ce_handler+0x1fb/0x3b0 [irdma] [34693.333285] ? irdma_ctrl_init_hw+0x2c20/0x2c20 [irdma] [34693.333290] ? __schedule+0x836/0x1570 [34693.333293] ? strscpy+0x83/0x180 [34693.333296] process_one_work+0x56a/0x11f0 [34693.333298] worker_thread+0x8f/0xf40 [34693.333301] ? __kthread_parkme+0x78/0xf0 [34693.333303] ? rescuer_thread+0xc50/0xc50 [34693.333305] kthread+0x2a0/0x390 [34693.333308] ? kthread_destroy_worker+0x90/0x90 [34693.333310] ret_from_fork+0x1f/0x40 Fixes: 44d9e52977a1 ("RDMA/irdma: Implement device initialization definitions") Signed-off-by: Shifeng Li Link: https://lore.kernel.org/r/20231121101236.581694-1-lishifeng1992@126.com Acked-by: Shiraz Saleem Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/irdma/hw.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/irdma/hw.c b/drivers/infiniband/hw/irdma/hw.c index 8aa507e87df37..9399d82560c92 100644 --- a/drivers/infiniband/hw/irdma/hw.c +++ b/drivers/infiniband/hw/irdma/hw.c @@ -578,9 +578,6 @@ static void irdma_destroy_cqp(struct irdma_pci_f *rf) struct irdma_cqp *cqp = &rf->cqp; int status = 0; - if (rf->cqp_cmpl_wq) - destroy_workqueue(rf->cqp_cmpl_wq); - status = irdma_sc_cqp_destroy(dev->cqp); if (status) ibdev_dbg(to_ibdev(dev), "ERR: Destroy CQP failed %d\n", status); @@ -745,6 +742,9 @@ static void irdma_destroy_ccq(struct irdma_pci_f *rf) struct irdma_ccq *ccq = &rf->ccq; int status = 0; + if (rf->cqp_cmpl_wq) + destroy_workqueue(rf->cqp_cmpl_wq); + if (!rf->reset) status = irdma_sc_ccq_destroy(dev->ccq, 0, true); if (status) -- 2.42.0