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 B91D6274B42; Sun, 1 Mar 2026 01:25:12 +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=1772328312; cv=none; b=ig0AeiqyIc1XJ8FRANFhrOBry267mtz3N2/LB9AqlgvEFDCB178trRHfmzPaxZcRg2rwrdbXRKz+0mzSrdbNYbdXT8SiTWwURbfuFnSafvaQAgDszbgY944kvMSk+pvZNfi8uJVejTpKEkKgOR/PRebTeGQh1JdLBYI1K7JapDY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772328312; c=relaxed/simple; bh=/s/gefyzZLKHFfruEbLzqn0cvHKqDCWeFmV76HoXI6g=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=dlH0LPmC7AO+pG9ykCwvlmNVOAc2whdGTRgO+99kvUupx6lcmN+3h4TKodnljX6P0tixBEMBsA1qRkWxMmEtt/96cVw5LY9Z4M93JZUhkTbzdNkud12llqkt6RTY0aokDn9skmhgtM/NWDZUe1BjOFL7CyOvl/weBgZcNBKYHZA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=p+C+6E5S; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="p+C+6E5S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C44C5C2BC86; Sun, 1 Mar 2026 01:25:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772328312; bh=/s/gefyzZLKHFfruEbLzqn0cvHKqDCWeFmV76HoXI6g=; h=From:To:Cc:Subject:Date:From; b=p+C+6E5SddsvVwuoyOnlpsoin9qOrPnl0tjUGkMQ0plfjPAWP3KmK6eaD25FrX5Ut R6K9GAtQuDuvV+3PfEZu8VA7F67Go4TP76weZEKZvg7vRc9aa53T1BJlhC+Yy4xudk vQXS9/MT7lN0CS97IOcR65EY3p5RN185IxQBb7R7iBqhNmFwBTsvBIYGJdFKibY1jO YE9fWFyIofPomMge+utGWuLmOJGQNtEnovsVhZPR1qWOSQmKGcS1CFvolCCfxVTdN4 NMcrl9gJtHjmvJWWfhFTM8K0e5kQy5cyyx5fYWP2fUgAEWbZxQPFvkTaNMGjR3T15T s+PlvZGjH65FQ== From: Sasha Levin To: stable@vger.kernel.org, leitao@debian.org Cc: "Peter Zijlstra (Intel)" , Oleg Nesterov , Andrii Nakryiko , "Masami Hiramatsu (Google)" , linux-perf-users@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: FAILED: Patch "uprobes: Fix incorrect lockdep condition in filter_chain()" failed to apply to 6.12-stable tree Date: Sat, 28 Feb 2026 20:25:10 -0500 Message-ID: <20260301012510.1682217-1-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Hint: ignore X-stable: review Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From a56a38fd9196fc89401e498d70b7aa9c9679fa6e Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 28 Jan 2026 10:16:11 -0800 Subject: [PATCH] uprobes: Fix incorrect lockdep condition in filter_chain() The list_for_each_entry_rcu() in filter_chain() uses rcu_read_lock_trace_held() as the lockdep condition, but the function holds consumer_rwsem, not the RCU trace lock. This gives me the following output when running with some locking debug option enabled: kernel/events/uprobes.c:1141 RCU-list traversed in non-reader section!! filter_chain register_for_each_vma uprobe_unregister_nosync __probe_event_disable Remove the incorrect lockdep condition since the rwsem provides sufficient protection for the list traversal. Fixes: cc01bd044e6a ("uprobes: travers uprobe's consumer list locklessly under SRCU protection") Signed-off-by: Breno Leitao Signed-off-by: Peter Zijlstra (Intel) Acked-by: Oleg Nesterov Acked-by: Andrii Nakryiko Acked-by: Masami Hiramatsu (Google) Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260128-uprobe_rcu-v2-1-994ea6d32730@debian.org --- kernel/events/uprobes.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index dfbce021fb027..424ef2235b07e 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1138,7 +1138,7 @@ static bool filter_chain(struct uprobe *uprobe, struct mm_struct *mm) bool ret = false; down_read(&uprobe->consumer_rwsem); - list_for_each_entry_rcu(uc, &uprobe->consumers, cons_node, rcu_read_lock_trace_held()) { + list_for_each_entry(uc, &uprobe->consumers, cons_node) { ret = consumer_filter(uc, mm); if (ret) break; -- 2.51.0