From nobody Tue Dec 2 01:04:37 2025 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 7D6BC2BEC26 for ; Mon, 24 Nov 2025 05:14:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763961246; cv=none; b=rGIrA54nNH9ziGawhQ6wqTsLWsW/LwS65GCGkbXkrYxiEUd22eAH72X262RIfsfKGsyzoInoxcFVeLEhSrh6B/8Eu4iJLxBgmOb7Z+dv97K4cI1sUN97hoUp+8/5IYe6zGmjmIxKTul9lXdWo2czKT2yGlWNYujb2ew0/EulYDY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763961246; c=relaxed/simple; bh=A6XusiENVYg4n9qgFqmZNjYZePunhQiNLevzHNngsek=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=NjRHN/wg16chQg54JL9/4ND3SCARjgSrDKbRZwY+h08sDGcfRBDuLbPUpCMavt5a7W5kSCpcm9liesjNcjYYeLsRqO35ApkKXxkfwXOC9iSb0mi38vev0/0Yi2x5ijMbC7xB6bvLsiPrOSqBrwlgLswJZZa9cvn/4iVB4cIASpg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=cvCaXNmc; arc=none smtp.client-ip=192.198.163.19 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="cvCaXNmc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763961245; x=1795497245; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=A6XusiENVYg4n9qgFqmZNjYZePunhQiNLevzHNngsek=; b=cvCaXNmcyIhCALZMD01ShZ60hl/fOYDme9LB64R6DWTkY/1IZ6ojKFKc cq23LEJr1E2+jVZpagM+bF5tfPo9sS5hU4QD2UScmi4GDQNYaoxRa3hbH FRZ3fudG1XFk2Z1d16ZfLtMAjo7Lrk7cvFVbgRNcT0WeTwtyb+n1MpBkC o23GWTLuSQSccPaZJNM/kdrXi7V1xq2KwLyIojhWFGQa1zn0de9Bo32c5 ePYTDK96dJsGSRDJ2XwXqTcZTEgeFaPeaZ/fAazNn4g4oR8NYUKk3q+O9 H10VgUGdiKYPkYEo4raAZBwEOYx91wVTRj7BQeXu3vQWQYyP1FCWzehKO g==; X-CSE-ConnectionGUID: Id3uzLdNS0uzOeZQLVDReA== X-CSE-MsgGUID: DXDTJaO8SSW8W6+pMLz88g== X-IronPort-AV: E=McAfee;i="6800,10657,11622"; a="64957853" X-IronPort-AV: E=Sophos;i="6.20,222,1758610800"; d="scan'208";a="64957853" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Nov 2025 21:14:05 -0800 X-CSE-ConnectionGUID: 7IrOPtNXQQmiFeF/GtIFrA== X-CSE-MsgGUID: Xkbox+ZAQP6Evx5kzXuP5g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,222,1758610800"; d="scan'208";a="222880822" Received: from baandr0id001.iind.intel.com ([10.66.253.151]) by orviesa002.jf.intel.com with ESMTP; 23 Nov 2025 21:14:04 -0800 From: Kaushlendra Kumar To: tglx@linutronix.de, peterz@infradead.org Cc: linux-kernel@vger.kernel.org, Kaushlendra Kumar Subject: [PATCH] smpboot: Add NULL check before kthread_unpark() Date: Mon, 24 Nov 2025 10:41:44 +0530 Message-Id: <20251124051144.1427596-1-kaushlendra.kumar@intel.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add NULL check for tsk before calling kthread_unpark() in smpboot_unpark_thread() to prevent potential null pointer dereference. Signed-off-by: Kaushlendra Kumar --- kernel/smpboot.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/smpboot.c b/kernel/smpboot.c index 4503b60ce9bd..a37d25b23f58 100644 --- a/kernel/smpboot.c +++ b/kernel/smpboot.c @@ -225,7 +225,7 @@ static void smpboot_unpark_thread(struct smp_hotplug_th= read *ht, unsigned int cp { struct task_struct *tsk =3D *per_cpu_ptr(ht->store, cpu); =20 - if (!ht->selfparking) + if (tsk && !ht->selfparking) kthread_unpark(tsk); } =20 --=20 2.34.1