From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.smtp-ext.broadcom.com (lpdvsmtp09.broadcom.com [192.19.166.228]) (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 C5A44385D6C; Fri, 24 Jul 2026 21:47:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.19.166.228 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784929679; cv=none; b=mQcw2gEJLIvlTCyIsc2YTxhu48FlOlHq57V3OZlhIBOc2wD8LSKn/14ZZdKw6Pf+rUATV2bLeiUqWcdPADx7WegyeXyEhZnvtH6JbUkmv/RmoVDPH5vemI83SdGjHevigINNyPPo28cqADvr2zlnryRQdEG/ppFdyJLc9zYQoGI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784929679; c=relaxed/simple; bh=QbIyHuCTZXlWeF4J0dDRY0wdd72yASGiNYrryz+pe/M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mwYdWIPaznWJhmuZGlzJWgBx2J+/DW05zfq4TVqXhLInK698wCMDMHGpDuoEtOQu1d2eduXpwfvVvqNvwbAwvA1Vdxqq3Y3CaFFeJ+kD9SQZXnukYrgK6AZ4COYJOkRMFp1Cr6rV/f0XFq7/HhJ8TrjeQA6Q4HaSB3up0vZC3cM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=QFbsERre; arc=none smtp.client-ip=192.19.166.228 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="QFbsERre" Received: from mail-lvn-it-01.broadcom.com (mail-lvn-it-01.lvn.broadcom.net [10.36.132.253]) by relay.smtp-ext.broadcom.com (Postfix) with ESMTP id 217EFC0000FB; Fri, 24 Jul 2026 14:41:22 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com 217EFC0000FB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1784929282; bh=QbIyHuCTZXlWeF4J0dDRY0wdd72yASGiNYrryz+pe/M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QFbsERreLH4vaLK/6Wf3eBAZ59eS1Bk3UPqa3P5uvAKAjNEVkLiR+vON2Ne7fqezt yGcsobjQNsttIoMqAh5d85oXKLtK7EwEzAOw94I2kASE0LXN/FmQ/58jtDzVvhEQuD aCRflgvsZuKuxKAQ8/YjYNThvx9U0PJrGxcDRblQ= Received: from stbirv-lnx-1.igp.broadcom.net (stbirv-lnx-1.igp.broadcom.net [10.67.48.32]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail-lvn-it-01.broadcom.com (Postfix) with ESMTPSA id E7A4AACE; Fri, 24 Jul 2026 14:41:21 -0700 (PDT) From: Florian Fainelli To: stable@vger.kernel.org Cc: Tiwei Bie , Johannes Berg , Florian Fainelli , Richard Weinberger , Anton Ivanov , Johannes Berg , Brendan Higgins , David Gow , Rae Moar , Kees Cook , Jens Axboe , Al Viro , linux-um@lists.infradead.org (open list:USER-MODE LINUX (UML)), linux-kernel@vger.kernel.org (open list), linux-kselftest@vger.kernel.org (open list:KERNEL UNIT TESTING FRAMEWORK (KUnit)), kunit-dev@googlegroups.com (open list:KERNEL UNIT TESTING FRAMEWORK (KUnit)), bcm-kernel-feedback-list@broadcom.com Subject: [PATCH stable 6.12 4/9] um: Set parent-death signal for ubd io thread/process Date: Fri, 24 Jul 2026 14:41:14 -0700 Message-Id: <20260724214119.1066665-5-florian.fainelli@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260724214119.1066665-1-florian.fainelli@broadcom.com> References: <20260724214119.1066665-1-florian.fainelli@broadcom.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tiwei Bie commit 9b5e6c0f5a9199c69af81ac5bedc512ee7dc20b3 upstream The ubd io thread is not really a traditional thread. Set the parent-death signal for it to ensure that it will be killed if the UML kernel dies unexpectedly without proper cleanup. Signed-off-by: Tiwei Bie Link: https://patch.msgid.link/20241024142828.2612828-3-tiwei.btw@antgroup.com Signed-off-by: Johannes Berg Signed-off-by: Florian Fainelli --- arch/um/drivers/ubd_kern.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index 2bfb17373244..66c1a8835e36 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -1501,6 +1501,7 @@ int io_thread(void *arg) { int n, count, written, res; + os_set_pdeathsig(); os_fix_helper_signals(); while(1){ -- 2.34.1