From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from relay.smtp-ext.broadcom.com (lpdvsmtp12.broadcom.com [192.19.144.207]) (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 DCA763B6371; Fri, 24 Jul 2026 21:41:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.19.144.207 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784929290; cv=none; b=UPYvemOXn7+BlBTRLZiRY7EpPukVWLA29zRvmZuzkZlhaYPt4Bo8memIxM1tFLYANfXiG91qhapH3KMPkr89Wo4a1v5DBM5r/dv8VqxFsgGg+uHiLvNGABduhuFQmkyXR1CYbmN+wNXpzggsS8CHXdvtzzjbtfhjv4ZSrLv5L+w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784929290; c=relaxed/simple; bh=MwClynYi4UNnl6Qv2z6qYYcDGD0umclzy3mfRtl6KE4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=amHkpoPdueuf5hSQFLtF8jiwCWklV1mX1q4hgeEcit19Lp1iniqgYn6QYi1BS27VwT5ltnMuMQuj1LlHT01bVln3ZjOaAnR/90Qb0OMrWQeQ/h+bdmyqKgL6iSp4J5v7Gm6t/+hqW6EFY5iJkScWbuyF2464a1L77woW7qtodUw= 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=HbkSZXF6; arc=none smtp.client-ip=192.19.144.207 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="HbkSZXF6" 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 8F7AAC0003F1; Fri, 24 Jul 2026 14:41:22 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com 8F7AAC0003F1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1784929282; bh=MwClynYi4UNnl6Qv2z6qYYcDGD0umclzy3mfRtl6KE4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HbkSZXF6FeBLqDbu0mITagG9fU09UAuSao2iEKeVgkTycc0QhkXC2sweyCb6I/Khp 4Wd0zWkWNTtKYEQra0UTqgsbQw0SY234WytDNj/pEC+EShYu4DkntRbX5BBq4Jvdix lVi6CmVFZE4nw6kxfLM7C7RPodBNw+9HqKY4YOcA= 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 295C8ACD; Fri, 24 Jul 2026 14:41:22 -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 5/9] um: Set parent-death signal for write_sigio thread/process Date: Fri, 24 Jul 2026 14:41:15 -0700 Message-Id: <20260724214119.1066665-6-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 c6c4adee65969218b0b7b13f568fd2c6f2333373 upstream The write_sigio 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/20241024142828.2612828-4-tiwei.btw@antgroup.com Signed-off-by: Johannes Berg Signed-off-by: Florian Fainelli --- arch/um/os-Linux/sigio.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/um/os-Linux/sigio.c b/arch/um/os-Linux/sigio.c index 9e71794839e8..9aac8def4d63 100644 --- a/arch/um/os-Linux/sigio.c +++ b/arch/um/os-Linux/sigio.c @@ -55,6 +55,7 @@ static int write_sigio_thread(void *unused) int i, n, respond_fd; char c; + os_set_pdeathsig(); os_fix_helper_signals(); fds = ¤t_poll; while (1) { -- 2.34.1