linux-kernel - Re: Garbage characters on serial console (Linus "next")

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

Date:	Fri, 06 Jun 2014 15:28:00 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Tony Luck <tony.luck@...il.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Garbage characters on serial console (Linus "next")

On 06/06/2014 03:07 PM, Tony Luck wrote:
> Pulled from Linus' "next" branch (HEAD =
> 2b03adc1911d1c84cb7fad8b424234f589547cb3)
> and built & booted on ia64.  I see a lot of random characters on the
> serial console. Suspiciously starting right after reporting the serial
> line has been found.
> 
> Here's what the output looks like when I "vi" the saved file:
> 
> io scheduler noop registered^M
> io scheduler deadline registered^M
> io scheduler cfq registered (default)^M
> pci_hotplug: PCI Hot Plug PCI Core version: 0.5^M
> Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled^M
> 00:02: ttyS0 at I/O 0x3f8 (irq = 44, base_baud = 115200) is a 16550A^M
> <80>^\þÇ^@üþ^\à^\<8c>àüðð^\<80><80>üðøþ<80>à<8e>^@üà^\àðÀ<80>^@<8e>à^@à<80><80>^\^\ÿ^\^@^\þþà^@à^\ðð^\<80><80>üþ<80>ü<80>þðøüà<8e>^\à<80>ð^@ÿ<80>üðà^@à<8e>ð<80><80><80><80>þðþ<80>üþ^\à^\^\<80>þÇü^\øà<8e>^@^\à^\^\^\ð<8e><80>ðà<8e><80>^\^@^@^\^\<8e><8e>^\àþþ^\<8e>^@^\<80>^@þ^\ÿ^\à<80>^@^\^\ø^\^\à^L^@<8e>ð^\<80>^\^\ü^\ø^\ÿ
> 
> Output continues with alternating blocks of legible text and garbage.
> System eventually boots (with a legible "login:" prompt).
> 

Looks like the baud rate changed...

	-hpa


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/