From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
To: Petr Mladek <pmladek@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>,
Shreyas Joshi <shreyas.joshi@biamp.com>,
rostedt@goodmis.org, shreyasjoshi15@gmail.com,
linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Subject: Re: [PATCH] printk: handle blank console arguments passed in.
Date: Wed, 7 Oct 2020 23:39:21 +0900 [thread overview]
Message-ID: <20201007143921.GA470@jagdpanzerIV.localdomain> (raw)
In-Reply-To: <20201007123044.GA509@jagdpanzerIV.localdomain>
On (20/10/07 21:30), Sergey Senozhatsky wrote:
> On (20/10/07 09:28), Petr Mladek wrote:
> >
> > /*
> > * Dirty hack to prevent using any console with tty
> > * binding as a fallback and adding the empty
> > * name into console_cmdline array.
> > */
> > preferred_console = MAX_CMDLINECONSOLES;
[..]
> Hint: I can crash my laptop when I remove the "console=" boot param and
> comment out init_dup(file) calls in console_on_rootfs().
My guess is that since we don't have stdin/out/err fds then,
theoretically, something like this can happen
int main()
{
...
int fd = open(.... );
int fd = open(..., "vfat.ko");
//fd is 1
fprintf(stdout, "loading vfat\n");
...
}
stdout (fd 1) is not stdout, it's fd that we got from open(vfat.ko).
Does this make sense?
-ss
next prev parent reply other threads:[~2020-10-07 14:39 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-09 5:29 [PATCH] printk: handle blank console arguments passed in Shreyas Joshi
2020-03-17 1:34 ` Shreyas Joshi
2020-03-17 1:39 ` Steven Rostedt
2020-03-17 2:01 ` Sergey Senozhatsky
2020-03-17 2:17 ` Shreyas Joshi
2020-03-17 8:22 ` Sergey Senozhatsky
2020-05-22 6:46 ` Shreyas Joshi
2020-05-22 6:53 ` Shreyas Joshi
2020-05-22 10:00 ` Petr Mladek
2020-10-06 2:59 ` Sergey Senozhatsky
2020-10-06 3:35 ` Guenter Roeck
2020-10-06 5:08 ` Greg Kroah-Hartman
2020-10-06 11:17 ` Guenter Roeck
2020-10-06 6:59 ` Sergey Senozhatsky
2020-10-06 9:54 ` Petr Mladek
2020-10-06 13:33 ` Sergey Senozhatsky
2020-10-06 14:22 ` Guenter Roeck
2020-10-06 16:08 ` Sergey Senozhatsky
2020-10-06 9:52 ` Petr Mladek
2020-10-06 10:45 ` Guenter Roeck
2020-10-06 13:43 ` Petr Mladek
2020-10-06 16:35 ` Petr Mladek
2020-10-06 17:15 ` Sergey Senozhatsky
2020-10-07 7:28 ` Petr Mladek
2020-10-07 12:30 ` Sergey Senozhatsky
2020-10-07 14:39 ` Sergey Senozhatsky [this message]
2020-10-07 15:57 ` Guenter Roeck
2020-10-07 16:29 ` Sergey Senozhatsky
2020-10-08 5:52 ` Sergey Senozhatsky
2020-10-08 9:01 ` Petr Mladek
2020-10-08 10:56 ` Sergey Senozhatsky
2020-10-08 12:05 ` Sergey Senozhatsky
2020-10-22 11:38 ` Petr Mladek
2020-10-22 13:32 ` Sergey Senozhatsky
2020-10-08 8:50 ` Petr Mladek
2020-10-08 12:20 ` Sergey Senozhatsky
2020-10-08 12:37 ` Sergey Senozhatsky
2020-05-15 15:24 ` Petr Mladek
2020-05-20 11:50 ` Sergey Senozhatsky
2020-05-22 6:40 ` Shreyas Joshi
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