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 C4E91384CF5; 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=1784929678; cv=none; b=j7sTT53oLWaAXxfGiRgYUKfWh4wgFAFSrrkz1auzoZQ3Myu7yu9mjQU1tEdMpz9Fxvi53pRSsMX+nCJcBr76t/BtGZkEBuczCQepp8t8IP9Rih4WetZ0jD+joRQubaw82Ro1Bi7SvQfCEe4XmkZCA+sz8gC5ycu/B+ke/DFbGOM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784929678; c=relaxed/simple; bh=wMjqlEZYnVh14Bap38tP88tLAFmuKutSDKQ4369eTWE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=tfgAAFISlerDYH4OV4Troo6Yd+Zi7rO8U6ZZrVaudykSHasxUg0kaLEEXyBU+/tWLo3Wt1eCL4CHjWj0AYSouqEuD0vs8AwOn3r5PuW3pmNxg3m6skjE5zy8sCdYPOit6pbWTnXq84eJUYMSd7cNfrS1dYYOQ7uY6zI+h5uj878= 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=eZlKS5H9; 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="eZlKS5H9" 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 9033FC0000FE; Fri, 24 Jul 2026 14:41:22 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 relay.smtp-ext.broadcom.com 9033FC0000FE DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=broadcom.com; s=dkimrelay; t=1784929282; bh=wMjqlEZYnVh14Bap38tP88tLAFmuKutSDKQ4369eTWE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=eZlKS5H9n0k9CSn7Quj4PBlP2j95+hScWQv203eAYsU9oldUR6byVp29DgK5cFezk /b39+PjoHkoICuemlbQ8VdskYxiGL/elw4rucRNvgIQoDWoPU0W8QsKManTe46DEkA E2MynffKOmid2RHm34nfBWuEgzWzaU/JVkYDXDRM= 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 5FDE5ACE; Fri, 24 Jul 2026 14:41:22 -0700 (PDT) From: Florian Fainelli To: stable@vger.kernel.org Cc: Benjamin Berg , Johannes Berg , Florian Fainelli , Richard Weinberger , Anton Ivanov , Johannes Berg , Brendan Higgins , David Gow , Rae Moar , Kees Cook , Jens Axboe , Al Viro , Tiwei Bie , 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 6/9] um: Set parent death signal for userspace process Date: Fri, 24 Jul 2026 14:41:16 -0700 Message-Id: <20260724214119.1066665-7-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: Benjamin Berg commit 801e00d3a1b78b7f71675fae79946ff4aa3ee070 upstream Enable PR_SET_PDEATHSIG so that the UML userspace process will be killed when the kernel exits unexpectedly. Signed-off-by: Benjamin Berg Link: https://patch.msgid.link/20240919124511.282088-4-benjamin@sipsolutions.net Signed-off-by: Johannes Berg [florian: upstream applies os_set_pdeathsig() in stub_exe.c, a file introduced in v6.13 that does not exist in 6.12; applied instead to userspace_tramp() in arch/um/os-Linux/skas/process.c, which is the equivalent entry-point for the userspace process in 6.12] Signed-off-by: Florian Fainelli --- arch/um/os-Linux/skas/process.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index b6f656bcffb1..cca016b0b29b 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -214,6 +214,9 @@ static int userspace_tramp(void *stack) (unsigned long) stub_segv_handler - (unsigned long) __syscall_stub_start; + /* Make sure this process dies if the kernel dies */ + os_set_pdeathsig(); + ptrace(PTRACE_TRACEME, 0, 0, 0); signal(SIGTERM, SIG_DFL); -- 2.34.1