linux-kernel - [PATCH 07/12] unwind: Clarify calling context

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250924080119.122507632@infradead.org>
Date: Wed, 24 Sep 2025 09:59:55 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: jpoimboe@...nel.org,
 rostedt@...nel.org
Cc: linux-kernel@...r.kernel.org,
 peterz@...radead.org
Subject: [PATCH 07/12] unwind: Clarify calling context

The get_cookie() function hard relies on IRQs being disabled, but this
isn't immediately obvious when reading the function.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 kernel/unwind/deferred.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/kernel/unwind/deferred.c
+++ b/kernel/unwind/deferred.c
@@ -79,6 +79,8 @@ static u64 get_cookie(struct unwind_task
 {
 	u32 cnt = 1;
 
+	lockdep_assert_irqs_disabled();
+
 	if (info->id.cpu)
 		return info->id.id;