linux-kernel - Re: [PATCH] dump_stack: convert generic dump

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]

Date:   Tue, 6 Mar 2018 13:29:57 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Tejun Heo <tj@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Dave Young <dyoung@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Greentime Hu <green.hu@...il.com>,
        Vincent Chen <deanbo422@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        adi-buildroot-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: Re: [PATCH] dump_stack: convert generic dump_stack into a weak symbol

On (03/05/18 15:48), Petr Mladek wrote:
[..]
> 
> I hope that I did not miss anything. I could not try this at
> runtime.

I think you can. The rules are universal, you can do on x86
something like this

---

 arch/x86/kernel/dumpstack.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index a2d8a3908670..5d45f406717e 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -375,3 +375,16 @@ static int __init code_bytes_setup(char *s)
 	return 1;
 }
 __setup("code_bytes=", code_bytes_setup);
+
+void dump_stack(void)
+{
+	dump_stack_print_info(KERN_DEFAULT);
+
+	pr_crit("\t\tLinux\n\n");
+
+	pr_crit("An error has occurred. To continue:\n"
+		"Press Enter to return to Linux, or\n"
+		"Press CTRL+ALT+DEL to restart your computer.\n");
+
+	pr_crit("\n\n\tPress any key to continue _");
+}

---

Should be enough for testing.

> Anyway, from my side:
> 
> Reviewed-by: Petr Mladek <pmladek@...e.com>

Thanks.

	-ss