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 B15EB27F4F5; Mon, 13 Apr 2026 16:33:11 +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=1776097991; cv=none; b=NEjcfhAYU27qyBg8ravELNuaF3I8wePFVN9IYLqZy7lhnYKOCSPkTI8wOHaZDpVNawKlopPXQd3ZSV9qvqnJc11LISmsfS7p5ouLAAO6tZ8LCKu/OiIJWjF4gJRzCzXJqGqmp233/MPsPoHMm6JFpnA3GXNpXTb+PbbMLP1jQVY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097991; c=relaxed/simple; bh=vCbGHsA5POF1S7kiIPn6Dt4z3+HtvFChOOKw9pNSRcg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IF38UAiVOuDMexq6QgPWReKkOIQ1UdFkG4OPnLLirE38c1f3Ei4xzRXbO/sOLisyVRPYASqlLUa0q9ALkpW1Bg5CurghIRDqcjimOeyEvoFZxvyPwDLJNG2okedjO9hOe223EXD/Qxy/0gcaINvBISR6ujcggbs1nMO2tyBdIQ0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=I3G5sPVq; 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="I3G5sPVq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48B15C2BCAF; Mon, 13 Apr 2026 16:33:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097991; bh=vCbGHsA5POF1S7kiIPn6Dt4z3+HtvFChOOKw9pNSRcg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I3G5sPVqA92amu6PXr239ZNB/xIZcalQMM1jMwe0agw/ycHFhwjNjiZWrZrYODlYO IbEM7+tXewUz4wPSijGGJemA4cj3cdb/c0sseKzADSGFlB7sZQkMEnj6rwwNb6EvQH pCR1LV0+2uXIpYDvaB+3La4arrURO1eGY2PdG13A= 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 5.15 351/570] RDMA/irdma: Fix deadlock during netdev reset with active connections Date: Mon, 13 Apr 2026 17:58:02 +0200 Message-ID: <20260413155843.634710789@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-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 b7186bb6a7bbc..986acd446c651 100644 --- a/drivers/infiniband/hw/irdma/verbs.c +++ b/drivers/infiniband/hw/irdma/verbs.c @@ -518,7 +518,8 @@ 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