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 BC157423A89; Tue, 31 Mar 2026 16:28:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774974516; cv=none; b=PgZJHwdAey3YmzhfRla+2yTCS+yCDvefrlsQcB8hYuPc9txcUPvjqyzcOSdXdrxGPqk3hgAvgU/7oUZnbZKEyd6ZNyhCxEFovQEG81IyUTdPglmiaoRp2ZHtVtUtG3Rn4Rf+2ADovQKOhQEqNakvGgsNtqTRbQKuzaiMEVyN63k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774974516; c=relaxed/simple; bh=LvLRELhMNF7lbXT3ZaepV8CEqAfu8rPEuL5Sgt9JuEw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=NBJ8aSudsRZosr+8W6DXcb8tX6jDbgF/9v68EKbNc4YjIrnCAwEy9T5KbLRiZkD9d4oZSJtJCHE5XZr4dAkwb7SedpPNyQTKWlucTdiNQuTcotMX/6sOcNKdKb+g5Lu1koYJt/wsFpAJZJ5WlJhQAcdS8R2julDHwFkcmafoJLc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JVoGqd9M; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="JVoGqd9M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 02166C19423; Tue, 31 Mar 2026 16:28:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774974516; bh=LvLRELhMNF7lbXT3ZaepV8CEqAfu8rPEuL5Sgt9JuEw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JVoGqd9Mo+Vga2vtjy2B2Wf0ADx4TLuloCtihK0SL1v3Qr9cilfuhTNdc4pnPHWyQ stkkqcDYcGpSfsA7iDiZ9Rxz+DLlpsxRarVd4T/nH8Z5ff+QSIqkV+V/O7XHv6JFPg CPFJOUJTyoyjkj4/REzdtMcxdz62nOKkmKzyPlBw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Anil Samal , Tatyana Nikolova , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.6 082/175] RDMA/irdma: Fix deadlock during netdev reset with active connections Date: Tue, 31 Mar 2026 18:21:06 +0200 Message-ID: <20260331161732.785929617@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260331161729.779738837@linuxfoundation.org> References: <20260331161729.779738837@linuxfoundation.org> User-Agent: quilt/0.69 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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Anil Samal [ Upstream commit 6f52370970ac07d352a7af4089e55e0e6425f827 ] Resolve deadlock that occurs when user executes netdev reset while RDMA applications (e.g., rping) are active. The netdev reset causes ice driver to remove irdma auxiliary driver, triggering device_delete and subsequent client removal. During client removal, uverbs_client waits for QP reference count to reach zero while cma_client holds the final reference, creating circular dependency and indefinite wait in iWARP mode. Skip QP reference count wait during device reset to prevent deadlock. Fixes: c8f304d75f6c ("RDMA/irdma: Prevent QP use after free") Signed-off-by: Anil Samal Signed-off-by: Tatyana Nikolova Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/irdma/verbs.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c index cc8c6e8586252..532b36b25e919 100644 --- a/drivers/infiniband/hw/irdma/verbs.c +++ b/drivers/infiniband/hw/irdma/verbs.c @@ -536,7 +536,8 @@ static int irdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) } irdma_qp_rem_ref(&iwqp->ibqp); - wait_for_completion(&iwqp->free_qp); + if (!iwdev->rf->reset) + wait_for_completion(&iwqp->free_qp); irdma_free_lsmm_rsrc(iwqp); irdma_cqp_qp_destroy_cmd(&iwdev->rf->sc_dev, &iwqp->sc_qp); -- 2.53.0