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 <[email protected]>.
Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From a56a38fd9196fc89401e498d70b7aa9c9679fa6e Mon Sep 17 00:00:00 2001 From: Breno Leitao <[email protected]> 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 <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Oleg Nesterov <[email protected]> Acked-by: Andrii Nakryiko <[email protected]> Acked-by: Masami Hiramatsu (Google) <[email protected]> Cc: [email protected] Link: https://patch.msgid.link/[email protected] --- 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
