Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 9BEC4435EF0 for ; Tue, 29 Sep 2026 06:43:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790664186; cv=none; b=edxjcdbTu+pmjjhGunp4bhkiF30b6yCwwtHw95l0ErRL2d3qj9C6TI0xEx2bPgLkNqpJjmQgwA6q+MJjAIkQE53xddMbCgipdnjQJ87ug/eJh5Dry6S2Nz8DA6OaE4uouFhDEVWVUxbfEfo/b4Fo1mkk/O+r+LTIq8UcZf/QLeA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790664186; c=relaxed/simple; bh=ViqB7FcAvW1qOKEUcnWwk/clZRjZBXFso+fh3M/7Ts4=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=faGRCykp+b/wBTICt8vxamC7U5h/z5OvGwgkJu8AIOoL7aVGOl3Z7YAwAJVdvzxmz3LkRVzH4K38t5IC19huL+OW7f9iVRTrY/PRcIf9JRlyH5U3nRhekvFeTDuacpYOPF73WcMJRQpL8yh+vcrZILCr1GLLR9gJ8HqGkU6sRmM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ypaTa7ba; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ypaTa7ba" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D28D71F000FF; Tue, 29 Sep 2026 06:43:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790664185; bh=F2vfazyNZkvy3xA1T2gvS5VK0mV1jscdJnQmoG1aPgo=; h=Subject:To:Cc:From:Date; b=ypaTa7badHW10qXgMOOTCgFwMO8r+jc3ZJ/IoDMZ0EPB98utKwD2/uDzIk/9cEyFR jRTvY7GGs54fam8vkXj73Q7hKXsiyMfwN1sz4vZE7Ijx/u4xKPSRlYlBc6sqHpxhaZ BfyZ/wbkPvx7+u5aCATkMyLTby0JpUDWMn56vnXU= Subject: FAILED: patch "[PATCH] bna: prevent IOC timer rearm during teardown" failed to apply to 5.15-stable tree To: mhun512@gmail.com,ae878000@gmail.com,pabeni@redhat.com Cc: From: Date: Tue, 29 Sep 2026 08:42:53 +0200 Message-ID: <2026092952-unknotted-program-cc12@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 77b1718e39e5c9f6956fb60807326af20baf889d # git commit -s git send-email --to '' --in-reply-to '2026092952-unknotted-program-cc12@gregkh' --subject-prefix 'PATCH 5.15.y' 'HEAD^..' Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 77b1718e39e5c9f6956fb60807326af20baf889d Mon Sep 17 00:00:00 2001 From: Myeonghun Pak Date: Mon, 21 Sep 2026 21:46:05 -0400 Subject: [PATCH] bna: prevent IOC timer rearm during teardown bna: prevent IOC timer rearm during teardown bnad_pci_remove() and the probe disable_ioceth path call timer_delete_sync() for ioc_timer, sem_timer and hb_timer, but not for iocpf_timer. bnad_iocpf_timeout() then takes bnad->bna_lock after free_netdev() has freed the struct bnad. Deleting iocpf_timer last does not fix this. sem_timer and iocpf_timer rearm each other: bnad_iocpf_sem_timeout() can arm iocpf_timer, and bnad_iocpf_timeout() arms sem_timer from bfa_ioc_hw_sem_get() when the semaphore is busy. timer_delete_sync() only waits out its own callback. bnad_ioceth_disable() can time out and leave that callback live. Shut all four IOC timers down with timer_shutdown_sync() on both paths, so a later mod_timer() is ignored. This issue was identified during our ongoing static-analysis research while reviewing kernel code. Fixes: 1d32f7696286 ("bna: IOC failure auto recovery fix") Cc: stable@vger.kernel.org Assisted-by: LLM Co-developed-by: Ijae Kim Signed-off-by: Ijae Kim Signed-off-by: Myeonghun Pak Link: https://patch.msgid.link/20260922014605.588040-1-mhun512@gmail.com Signed-off-by: Paolo Abeni diff --git a/drivers/net/ethernet/brocade/bna/bnad.c b/drivers/net/ethernet/brocade/bna/bnad.c index 8b75004ba7c9..55dfd4896785 100644 --- a/drivers/net/ethernet/brocade/bna/bnad.c +++ b/drivers/net/ethernet/brocade/bna/bnad.c @@ -2571,6 +2571,22 @@ bnad_ioceth_disable(struct bnad *bnad) return err; } +/* + * The IOC timers rearm one another, so deleting one cannot stop a + * sibling callback from arming it again. Shut them down so a later + * mod_timer() is ignored. + */ +static void +bnad_ioc_timers_shutdown(struct bnad *bnad) +{ + struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc; + + timer_shutdown_sync(&ioc->ioc_timer); + timer_shutdown_sync(&ioc->sem_timer); + timer_shutdown_sync(&ioc->hb_timer); + timer_shutdown_sync(&ioc->iocpf_timer); +} + static int bnad_ioceth_enable(struct bnad *bnad) { @@ -3727,9 +3743,7 @@ bnad_pci_probe(struct pci_dev *pdev, bnad_res_free(bnad, &bnad->mod_res_info[0], BNA_MOD_RES_T_MAX); disable_ioceth: bnad_ioceth_disable(bnad); - timer_delete_sync(&bnad->bna.ioceth.ioc.ioc_timer); - timer_delete_sync(&bnad->bna.ioceth.ioc.sem_timer); - timer_delete_sync(&bnad->bna.ioceth.ioc.hb_timer); + bnad_ioc_timers_shutdown(bnad); spin_lock_irqsave(&bnad->bna_lock, flags); bna_uninit(bna); spin_unlock_irqrestore(&bnad->bna_lock, flags); @@ -3770,9 +3784,7 @@ bnad_pci_remove(struct pci_dev *pdev) mutex_lock(&bnad->conf_mutex); bnad_ioceth_disable(bnad); - timer_delete_sync(&bnad->bna.ioceth.ioc.ioc_timer); - timer_delete_sync(&bnad->bna.ioceth.ioc.sem_timer); - timer_delete_sync(&bnad->bna.ioceth.ioc.hb_timer); + bnad_ioc_timers_shutdown(bnad); spin_lock_irqsave(&bnad->bna_lock, flags); bna_uninit(bna); spin_unlock_irqrestore(&bnad->bna_lock, flags);