From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 CEE163644BE; Tue, 6 Jan 2026 17:53:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767721988; cv=none; b=Go/NYFg47F2cZshUGet5aFStzNaKwhYDXdGXG+VXldhJ1xhiFiAhJorV0FrdGIzKGMm/DytXdhqbaHNxTi3Fddz6pESkjl121yYmSVGffjpdSY0ayQ3Fm/YQ/9gjaNvJ4b1274kR8himt3ntX5gZ1205pOPEr1ZCd9zHiuOyZlc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767721988; c=relaxed/simple; bh=DUAfrA4EVcG/fASPY7jqL0rYDaelLH2o+FYYwlRCxrU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pfKaNkuL2+R4IMku6AAByhG0+cpGVsu2WmZFkg+OedlaM9rcC9z3AZzmQDp1btvqrqZMBIZNJ00XVoy9EmjYjoluM5bQ9bC/Vc6wqjccnIhAmd/HbN9+gJjWy67Q9V+w5dIgUweAKTmcce33WVnDUi8x1ZD6bdwkv8SGTD7JzWY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ri2E7Dv5; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ri2E7Dv5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43E8EC116C6; Tue, 6 Jan 2026 17:53:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1767721988; bh=DUAfrA4EVcG/fASPY7jqL0rYDaelLH2o+FYYwlRCxrU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ri2E7Dv5LkcaVbMmkwnY/x6UOGLeZLa3VZAURCa5NHzWDVcomIy8nlMSUzEXJk/Gv auvnshe9oLGQw6JZMqjvRputywdxs67XQNNbDfniJwsdVw6BkDfDq3UHdu/BkUSk0R csim7XZ+63HZ2SlTYIAG7dqoIKHMZ509ymn0UBdU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, wang.yaxin@zte.com.cn, mhiramat@kernel.org, mark.rutland@arm.com, mathieu.desnoyers@efficios.com, zhang.run@zte.com.cn, yang.yang29@zte.com.cn, Shengming Hu , "Steven Rostedt (Google)" Subject: [PATCH 6.18 124/312] fgraph: Initialize ftrace_ops->private for function graph ops Date: Tue, 6 Jan 2026 18:03:18 +0100 Message-ID: <20260106170552.330383637@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260106170547.832845344@linuxfoundation.org> References: <20260106170547.832845344@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shengming Hu commit b5d6d3f73d0bac4a7e3a061372f6da166fc6ee5c upstream. The ftrace_pids_enabled(op) check relies on op->private being properly initialized, but fgraph_ops's underlying ftrace_ops->private was left uninitialized. This caused ftrace_pids_enabled() to always return false, effectively disabling PID filtering for function graph tracing. Fix this by copying src_ops->private to dst_ops->private in fgraph_init_ops(), ensuring PID filter state is correctly propagated. Cc: stable@vger.kernel.org Cc: Cc: Cc: Cc: Cc: Cc: Fixes: c132be2c4fcc1 ("function_graph: Have the instances use their own ftrace_ops for filtering") Link: https://patch.msgid.link/20251126172926004y3hC8QyU4WFOjBkU_UxLC@zte.com.cn Signed-off-by: Shengming Hu Signed-off-by: Steven Rostedt (Google) Signed-off-by: Greg Kroah-Hartman --- kernel/trace/fgraph.c | 1 + 1 file changed, 1 insertion(+) --- a/kernel/trace/fgraph.c +++ b/kernel/trace/fgraph.c @@ -1019,6 +1019,7 @@ void fgraph_init_ops(struct ftrace_ops * mutex_init(&dst_ops->local_hash.regex_lock); INIT_LIST_HEAD(&dst_ops->subop_list); dst_ops->flags |= FTRACE_OPS_FL_INITIALIZED; + dst_ops->private = src_ops->private; } #endif }