linux-kernel - [PATCH] lockdep: Add print_irqtrace_events() to _

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>] [day] [month] [year] [list]

Date:   Tue, 3 Apr 2018 10:35:40 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH] lockdep: Add print_irqtrace_events() to __warn

From: "Steven Rostedt (VMware)" <rostedt@...dmis.org>

Running a test on a x86_32 kernel I triggered a bug that an interrupt
disable/enable isn't being catched by lockdep. At least knowing where the
last one was found would be helpful, but the warnings that are produced do
not show this information. Even without debugging lockdep, having the WARN()
display the last place hard and soft irqs were enabled or disabled is
valuable.

Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
---
 kernel/panic.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/panic.c b/kernel/panic.c
index 2cfef408fec9..fa8d4cc4956a 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -554,6 +554,8 @@ void __warn(const char *file, int line, void *caller, unsigned taint,
 	else
 		dump_stack();
 
+	print_irqtrace_events(current);
+
 	print_oops_end_marker();
 
 	/* Just a warning, don't kill lockdep. */
-- 
2.13.6