From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793799413; b=MS3ysnlTNkRUvtKlIE0i1hDNXDAb597I0Bjg+gdTBWBtwbBivTInJR4SZwKlb/IauFVR cMnukLJ5/rsC/kfdJqYQIFzQa3hnoPbg2Wt5MFzE7aylU5x1dMcPWr3NNXb3LYLTJmmoj KFx22h0dhbescGtEez//u1ZYa+6WIRaPQSJnRpHr1CTYRE1sDh01sIp5L9eY6tQbaYlE+ FVwIs+5izaka74Xo7SkMl05r1vdYTAIEZCezqAMrdVLd7OmkrbEi9/lgm3IWf8OTyVTjt 8LD8XMY2ZW/0UiNAC+cxPiM2aAwe6exdaHgHniXJ1PcoE1ulYfmXft4Ajgxfd2ScogQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793799413; h=Received:DKIM-Signature:Subject:To:Cc:From:Date:Message-ID: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=4LNUFmDM7qSESkK7kvh3ikENvKL3ZUc9GBl++dqLwgQ=; b=m5sSlZNEuo4A5l8iDlTW+Vlkq8sMWfexgkEO0UVvnVKGvOyo8IEMdCmH18EKPja1fq1B 5G4DJ8UUTZswO+7DAYf4631hrTcBXqrURC/iv0qwhwW0kG39HVpFPBNiokWNawlQkjAui cqyWdKYAmr8Y31ukasGfEcza2A6ws7nOz3bh87WLRLvsIYVKaDL+YZ0KT114nn5igtW9k nJiJ+YSVYEhwbRmnHFkCuKjqnpTXaNk3wRO01J/mHI69yyeZCiloT+G57crYYObvDlhYs kSi81H7KUjqMWcWs+RgoJylvHPzRtwpgvZ3NO+blHpoaDaPYH+P1T7tfAkaxvuJNrBw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b="SjFwM/Al"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 73EC1606A31B for ; Wed, 4 Nov 2026 13:36:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=SjFwM/Al Received: by smtp.kernel.org (Postfix) with ESMTPSA id C62271F000C1; Wed, 4 Nov 2026 13:36:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793799413; bh=4LNUFmDM7qSESkK7kvh3ikENvKL3ZUc9GBl++dqLwgQ=; h=Subject:To:Cc:From:Date; b=SjFwM/AlAYB5G35P8CXtasMDmRVmwACblj77nkmEM5598HoMII0dOD8JBQKCM6TJW Te0uD/upS7PcGDubcmzijiuyNFPmEAy2OTgkEXW482a5hwNn4PbrtIJBqB+attMPZk ERBCileKzl/nZ8z+kdU93L12VbldSaPQn5trStj8= Subject: FAILED: patch "[PATCH] RDMA/irdma: avoid use-after-free in icrdma_remove" failed to apply to 5.15-stable tree To: lgs201920130244@gmail.com,leon@kernel.org Cc: From: Date: Wed, 04 Nov 2026 14:36:42 +0100 Message-ID: <2026110442-usual-nervy-ee84@gregkh> X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 8a8088b899e4cdfe558428cd6113d45df81625be # git commit -s git send-email --to '' --in-reply-to '2026110442-usual-nervy-ee84@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 8a8088b899e4cdfe558428cd6113d45df81625be Mon Sep 17 00:00:00 2001 From: Guangshuo Li Date: Mon, 14 Sep 2026 20:28:40 +0800 Subject: [PATCH] RDMA/irdma: avoid use-after-free in icrdma_remove icrdma_remove() dereferences iwdev after calling irdma_ib_unregister_device(): irdma_ib_unregister_device(iwdev) -> ib_unregister_device(&iwdev->ibdev) -> __ib_unregister_device() -> ib_dealloc_device() irdma registers irdma_ib_dealloc_device() as the dealloc_driver callback in its ib_device_ops. The RDMA core explicitly documents ib_unregister_device() that when ops.dealloc_driver is used, ib_dev will be freed upon return from the function. The ib_device is embedded in struct irdma_device and iwdev itself was allocated by ib_alloc_device(irdma_device, ibdev). Consequently, once irdma_ib_unregister_device() returns, iwdev must no longer be dereferenced. However, icrdma_remove() currently accesses iwdev->rf afterwards when deinitializing interrupts, destroying ah_tbl_lock, and freeing rf. Although the final ib_device storage is released with kfree_rcu(), the object lifetime has already ended and callers must not rely on the RCU grace period to continue dereferencing iwdev. Save iwdev->rf before unregistering the RDMA device and use the saved pointer for the remaining cleanup. This issue was found by manual code inspection. Fixes: 8498a30e1b94 ("RDMA/irdma: Register auxiliary driver and implement private channel OPs") Cc: stable@vger.kernel.org Signed-off-by: Guangshuo Li Link: https://patch.msgid.link/20260914122840.1709743-1-lgs201920130244@gmail.com Signed-off-by: Leon Romanovsky diff --git a/drivers/infiniband/hw/irdma/icrdma_if.c b/drivers/infiniband/hw/irdma/icrdma_if.c index 4b451d8482a4..f405ef761f84 100644 --- a/drivers/infiniband/hw/irdma/icrdma_if.c +++ b/drivers/infiniband/hw/irdma/icrdma_if.c @@ -318,14 +318,15 @@ static void icrdma_remove(struct auxiliary_device *aux_dev) container_of(aux_dev, struct iidc_rdma_core_auxiliary_dev, adev); struct iidc_rdma_core_dev_info *cdev_info = idc_adev->cdev_info; struct irdma_device *iwdev = auxiliary_get_drvdata(aux_dev); - u8 rdma_ver = iwdev->rf->rdma_ver; + struct irdma_pci_f *rf = iwdev->rf; + u8 rdma_ver = rf->rdma_ver; ice_rdma_update_vsi_filter(cdev_info, iwdev->vsi_num, false); irdma_ib_unregister_device(iwdev); - icrdma_deinit_interrupts(iwdev->rf, cdev_info); - mutex_destroy(&iwdev->rf->ah_tbl_lock); + icrdma_deinit_interrupts(rf, cdev_info); + mutex_destroy(&rf->ah_tbl_lock); - kfree(iwdev->rf); + kfree(rf); pr_debug("INIT: Gen[%d] func[%d] device remove success\n", rdma_ver, PCI_FUNC(cdev_info->pdev->devfn));