[PATCH] Add Zalgo support

[Matthew Garrett]

Add support for Zalgo

The Linux kernel is woefully unprepared for the coming of ZÒAÒLÒGÒOÌÌÌ . TÍhiÍÍsÌÌ
pÌÍaÍÌtÌÌÍcÌÌhÍÍ ÌÌaÌÒÍdÍÍdÌsÌÍ sÍuÌÍpÍpÍÍÌoÍrÌtÍ ÍÌfÌÍÍoÍrÌÌ ÌÌZÍaÒlgÌÌoÍ ÌtÌÍoÌÍ ÌkÌeÍÍrÌÌneÍlÒÒÌ ÍmÍÌeÌsÍÒsÌÌÍaÍgÍÍeÌÍÌ ÍouÍÍÍtpÌÌÍuÍtÍ in order to
rÍÍÍÍÌÍÌÍÍÍÌÍÍÍÍÍÌÍÍÌÌÌÌÍÍÌÌÍÍÌÍÌÌÌÌeÍÌÌÌÌÍÍÍÌÍÌÌÍÌÌÌÌÍÍÒÍÌÌÌÌaÍÌÌÍÍÌÌÌÍÌÍÌÍÌÍÍÍÍÍÍÍÌÍÌÌÌÌÍÌÍÌÌÌÌÌÍdÌÌÌÍÌÌÌÌÍÌÌÍÌÍÌÌÍÍÍyÍÌÍÌÌÌÍÍÌÍÌÍÌÌÍÍÌÌÌÌÌÍÍÌÌÌÍÍÌÌÌÌÌÍÌÌ ÍÍÌÌÌÌÍÍÍÌÍÌÌÍÍÍÍÌÌÍÍÌÌÌÌtÌÍÌÌÌÌÍÍÍÌÍÍÍÌÌÌÌÍÌÌÌÍÌÌÍÍÌÌÌÌÌÍÍÍÍÌÌÌhÌÌÍÍÍÍÍÌÌÌÌÍÌÌÌÍÍÍÌÍÌÌÍÍÌÍÍoÌÍÍÍÌÌÌÌÌÌÌÌÍÍÍÍÌÌÍÌÍÌÍÌÌÌÌÍsÍÍÍÌÍÌÌÌÌÍÌÍÍÌÌÍÌÍÌÍeÍÍÍÌÌÍÍÍÌÍÍÍÍÌÌÌÌÌÌÍÌÍ ÍÍÍÌÍÍÍÍÌÍÌÌÌÍÌÌÍÍÍÍwÍÍÌÌÍÌÌÌÌÍÌÌÌÌÍÍÌÌÌÌÍÌÌÌhÍÍÍÌÌÍÌÌÌÍÌÌÌÍÌÍÌÌÌÌÍÍÌÍÌÌÌÍoÌÌÌÌÌÍÌÍÍÍÍÌÌÌÌÍÌÍÌÌÍÌÌÌÌÌÍÌÌÌÍÌÌ ÌÍÌÍÌÌÍÍÍÌÍÌÍÌÌÍÍÍÍÍÌÌÌÍÌÍÌÍÌÌÍÌÌÌwÌÍÍÍÌÌÌÍÌÌÍÍÌÌÍÍÌÌÍÌÌÌÌÌÌÌiÍÍÍÍÍÍÍÍÌÌÌÌÌÍÌÒÌÍÌÌÌÌÌÌÌÌÌlÌÍÍÍÌÌÌÌÍÌÌÍÌÌÍÌÌÍÌÍÍÌÌÍÍÌÌÍÌÍÌÍÌÌÌÍÌÌlÌÌÌÌÌÌÍÌÍÍÍÍÌÌÍÌÌÌÌÍÌÍÌÌÌÍÌÍÍ ÌÍÍÌÌÍÌÍÍÍÌÌÍÌÌÍÍÍÍoÍÍÍÌÌÍÌÍÍÍÌÌÍÍÌÍÍÌÌÍÍÌÌÌÌÌÌÌÍÍÌÍÍtÌÍÌÍÌÌÌÍÌÍÍÌhÍÍÍÌÌÍÌÌÍÌÌÌÍÍÌÌÍÍÌÌÌeÍÍÌÌÍÍÌÌÍÌÌÍÍÍÌÌÌÌÍÍÌÌÌÌÌÌrÍÍÌÌÍÌÍÌÍÍÍÌÌÌÍÌÍÌÍÌÍÍÌÍÌÌÌÌÍÌÌÌÌÌÌÍÌÌÌwÍÍÍÍÍÌÍÍÍÍÌÌÍÌÌÌÍÌÍÌÍÌÌÍÌÌÌiÍÍÍÍÌÌÌÍÌÍÍÍÍÌÍÌÌÌÌÍÍÍÌÌÌÌÌÌÌÌÌÌÌÌsÍÌÍÍÌÌÌÍÍÌÍÍÍÌÍÌÌÌÍÌÌÍÍÍÌÍÍÌÌÍÌÌÍÍÌeÌÍÍÍÌÍÍÌÍÍÍÍÌÍÍÌ ÌÍÌÍÌÌÍÌÌÍÍÌÍÌÍÍÍÌÍÍÌÌÌÌÍÍÌÌÍÌbÍÌÍÌÌÍÌÌÌÍÌÌÌÌÍÌeÍÌÌÍÌÍÍÍÌÍÌÍÌÌÌÌÍÌÌÌÌÌÌÍÍÌÌÌÍÌ ÍÍÌÍÌÌÌÍÌÌÍÍÍÍÌÌÍÌÌÌÌÌeÍÌÍÍÌÌÍÍÌÌÌÌÌÍÌÌÌÌÌÌÍÍÍÌaÌÌÌÍÌÌÍÌÍÌÌÌÍÌÍÍÌÍÌÌÍÍÍÌÍÍÌtÍÍÍÌÍÍÌÍÍÍÌÌÌÍÌÌÍÍÍÍÍÍÌÌÌ
¬ÍÍÌÍeÍÌÌÍÍÍÍÌÍÍÌÍÍÌÍÌÌÍÍÌÌÍÌnÍÍÌÍÌÍÌÍÍÍÌÍÌÒÌÌÌÌÌÌÌÌ ÌÌÌÍÌÍÌÌÌÌÍÌÌÌaÍÌÍÌÌÌÌÌÌÌÍÌÌÍÌÌÍÍÌÌÌÍÍÍÌÌÍÌÌÌtÌÌÍÌÌÌÌÌÍÍÍÌÍÌÍÌÍÍÌÍÍÌÌÌÌÍ ÌÌÍÍÍÍÌÍÍÌÌÌÍÌÌÌÌÌÌÌÍÌÌÌÌtÌÌÍÌÌÌÍÍÍÌÍÍÍÌÌÌÌÍÌÌÍÌÌÌÌhÍÍÍÌÍÌÌÍÌÌÍÍÌÌÌÌÌÌÌÍÌÍÌÌÌÌÌÍÍÌeÍÌÍÌÍÌÌÍÍÍÌÍÍÍÍÌÌÌÌÌÌÌÌÍÍÌÌÌÌÍÌ ÌÌÌÍÌÍÌÌÌÌÍÌÍÌÍÌÌÌÍÌÌÌÌÌÍÌÌÍÍÌÌÍÍaÌÍÌÍÍÍÍÒÒÌÌÌÌÌÌÍÌÌÌÍÌÌÌÌÌrÌÌÍÍÌÌÍÍÌÌÌÍÍÌÍÍÌÍÌÌÍÌÌÌÍÍÍÌÌÍÌÌÌÌÌÌÌÌrÌÍÍÌÌÌÍÍÍÍÌÌÍÍÍÌÌÍÌÌÍÌÍÌiÌÌÍÌÍÍÌÍÌÍÌÌÌÌÌÍÍÌÌÌÍÌÌÌvÍÌÍÌÌÌÌÌÍÌÍÌÍÍÌÌÍÌÌÍÌÌÍÍÍaÌÍÌÍÌÍÍÌÌÍÌÌÍÌÌÌÍÍÌÌÍÌÌÌÌlÌÌÌÍÍÌÌÌÌÍÌÌÌÌÌÍÌÌÍÌÌÍÌÌÌÌÌÌ. DÌÌÍÍÍÌÌÍÌÍÍÌÍÌoÌÍÍÌÍÌÍÍ ÍÍÌÍÍÍÌnÍÌoÌÌÌÌÌtÌÌÌÍÌÌ ÍÌÌÌÌÌÌÌÍdÌÍÍÌÌeÌÍÌÌÌÌÌÌlÍÍaÍÌÌyÍÌÍÌÍÌÌÍ.ÍÌÌÍÍÌÍÌÍÍ

Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>

diff --git a/init/Kconfig b/init/Kconfig
index 2de5b1c..c67621b 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -872,6 +872,34 @@ config PRINTK
 	  very difficult to diagnose system problems, saying N here is
 	  strongly discouraged.
 
+config ZALGO
+       bool "Support for the coming"
+       help
+	  This option enables support for Zalgo in kernel
+	  messages. Zalgo is a corruption. The arrival of Zalgo has
+	  been foretold. Zalgo will not... wait. WhatÍ wasÌ tÍhÍat?Ì NeÍverÌ
+	  ÌmindÌ.Í ÍThÍiÌs ÌopÍtÍiÌon ÍwiÌlÌl permit ZÌaÌlÍgÍo aÌcceÌsÌsÌ ÌtÍoÌ ÌyoÌuÌrÍ ÌkÌernÍelÍ
+	  meÍssÌaÒgÍe buffeÌrÌ. PÌÌÌÍÌÌÍÌaÍÍÌÌÍÌÌÍÌÌÌyÌÌÌÍÌÍÍÌÌÍ
+	  ÌÍÍÍÍÍÍÍÌaÍÌÌÍÍÌÌÌÌÌÌÌtÌÌÍÌÍÌtÌÍÍÌÍÌÌÌeÌÌÍnÌÒÌÌtÍiÌoÍÍÌnÌÌÌÌ,ÌÌÌÌÍÍÌ ÍÌÌÌÌÌfÌÍÌoÌÌÌÌÍÌÍÌÌÌÍrÌÍÍÌÌÌÌÍÍÌ
+	  ÍÍÍÌÍÍÍÌÍÍÍÌÌtÌÍÍÌÍÌÍÍhÌÌÌÍÌÌeÍÌÌÍÍÌÍÌÌ ÍÌÌÌÌÌÍÌÌcÍÌÌÌÍÌÍÌÌÍÌoÍÍÍÍÌmÌÌÌÌÍÍÍÌÍÌÌÍÌiÍÍÌÌnÌÌÌÌÍÌÌÌÌÌÌgÌÍÍÍÍ
+	  ÍÌÍÌÌoÍÍÌÍÍÌÌÌÌÌÌÌfÌÍÍÍÌÌÌÌÍÌ ÌÍÍÍÍZÌÍÌÌÌÌÌÍÌaÌÌÍÌÌÍÍÌlÍÌgÌÌÌÌÌoÌÌÌÌÌÌÌÌÌ
+	  ÌÍÍÍÍÌÌÌÌsÌÌÍÌÌÌÌÍÍÍhÌÍÍÍÌÌÌÍÌaÌÒÌÌlÌÍÌÍÍÌÌlÌÌÌÌÌÌ ÍÍbÍÌÌÌÍÌÍÌÌÌÍÌÍeÌÌÍÌÌÍÌÌ
+	  ÌÍÍÍÌsÍÌÌÍÌÍÍwÌÍÌÍÍÌÌiÌÍÍÍÌÍfÍÌÍÌÍÌÌtÍÍÌÍÌÌÍÌÍÍÌÍÌÌÌ
+	  ÌÌÍÍÌÍÍÍÌaÍÍÍÌÍÌÍÍÌÌÌnÍÍÍÍÍÌÌÌÌÌÍÌdÍÍÌÍÍÌÌÍÌÌÍÌ
+	  ÌÍÍÌÍÌtÌÌÍÍÌÍÌÌÌhÍÌÌÍÍÍÌÍÌÌÍÍeÍÌÌÍÌÌÍÍÌÌ
+	  ÌÍÍÌÌÌÍpÍÌeÍÌÌÌÌÍÍÌÌÍÌnÍÌÍÌÌÌÌaÍÍÌÌÌÌlÌÍÍÍÌÍÌÌÌÌtÌÍÍÍÍÍÌÌiÍÌÍÌeÍÌÍÍÌÌÌÌÌÌsÍÍÍÌÍÌÌÌÌÌÌ
+	  fÍÌÍÌÍÌÌÌÍoÌÍÍÍÌÍÌÍÍÌÌrÌÌÌÌÌÌÌÌ
+	  ÌÍÍÌÍÌÌÌÌÍÌÌiÌÍÍÌÍÍÌÌÌÍgÌÌÌÍÌÒÌÌÌnÍÍÌÍoÌrÌÌÍÌaÌÌÍÌÌÌÌÌnÌcÍÍÍÌÍÌÍÍeÍÌ
+	  ÌÍÌÍÍÌÌwÍÌÌÌiÍÍÍlÍÌlÍÍÌÍÍÌ ÍÌÍÌÍÍÍÍÍÍÍÌbÌÌÍÍÍÍÌÌÍÌÍeÌ
+	  ÍÍÌÌÌÌÌÍÌÌsÍÌÌÌÌÌeÌÌÌÌÍÌÌÌÌÌÌÌvÌÍÌÌeÍÌÍÌÍÌÍÍÌÍÍrÌÍeÌÌÍÌÌÍÌ.ÌÍÍ
+
+
+	  WÌÌÍÌÍÍÍÌÍÌÌÌÌÍhÍÍÍÌÌÍÌÍÍÌÌÍÌÌÌÌÌÍÌÌÍÌaÌÌÍÍÌÌÌÌÍÌÍÌÍÌÍÒÌÌÌÍÌÌÌÍÌÌÌÌÌÍÍÌÍtÌÌÌÍÌÌÌÍÌÌÌÌÌÌÌÍÌÌÌÌÌÌÌÌ?ÌÌÍÌÌÌÌÍÌÌÍÌÌÌÍÌÌÍÌÌÌÌÍÌÌÌÌÌÌÌÌ
+       ÍÌÍÌÌÍÌÍÌÌÌÍÍÍÌÌÌÌÌÍÌÌÌÌNÍÍÍÍÌÍÌÍÌÌÍÌÍÌÍÍÌoÌÌÌÌÍÌÍÌÌÌÌÌ.ÍÍÌÍÍÌÌÍÍÌÌÍÌÌÍÌÌÌÍÌÌ
+       ÌÌÌÌÌÌÍÍÍÒÌÌÌÌÍÌÌÌÌÍÌÍÍÌÌÌÍZÌÍÌÍÌÌÍÍÍÌÌÌÌÌÌÍÍÍÌÌÌaÌÍÌÍÌÍÍÌÌÍÍÌÌÍÍÍÌÌÌÍÌÌÌÌÍÍÌÌÍÌÌlÍÍÌÌÍÌÌÌÍÌÌÌÌÍgÍÍÍÌÌÍÌÌÌÌÌÌÍÌÍÌÍÌÍÌÍÍÌÍÌÌÌÍÌÌÌÍÍÍÌÌoÌÌÌÌÌÍÌÌÍÍÍÍÌÌÌÌÍÌÌÌÍÍ.ÌÍÌÍÍÍÌÌÌÌÍÌÌÌÍÍÍÍÌÌÌÌÌÌÌÌÌÌÌÌ
+       ÍÌÍÌÌÌÍÌÌÍÍÍÌÌÍÍÍÍÌÍÌÌÌÌÌÍÌÌÌÌÍÌÌÍÌÌSÌÍÌÍÌÌÌÍÌÌÌÍÌÌÌÍÍÍÍÍaÌÌÌÍÌÍÌÌÌÌÌÍÌÌÌÌÌÌÌÌÍÌÌÌÌÌÌvÍÌÌÌÌÌÍÌÍÌÍÍÌÌÍeÍÍÌÌÍÌÌÌÌÌÍÌÌÌÌÍÌÌÌÍÌÍÌÌÌÍÌÌÍÌÌ
+       ÍÌÍÍÌÍÌÌÌÌÌÌÍÍÌÍÍÌÌÌÌÌÌÌÌÌÌÌÍÌyÌÌÍÌÌÌÌÌÌÍÌÍÍÌÌÍÌÌÍÌÌÌÌÌÌÌÍÌÍÌÌÌÌÍÍÌÍÌÌoÌÍÌÍÍÌÍÍÍÌÍÌÍÍÌÍÌÌÌÌÌÌÌÌÌÌÍÌuÍÌÌÍÍÍÒÌÍÌÍÌÌÍÍrÌÍÍÍÌÍÌÍÍÍÍÌÌÌÍÌÌÌÌÍÍÌÌÍÌÌÌsÌÌÌÍÍÍÌÌÍÌÍÌÍÍÍÍÌÌÌÍÌÌeÌÍÌÍÍÍÌÌÍÌÌÌÍÌÌÌÌÍÍÌÌÌÌÍÍÍÌÌÍÌÌlÌÍÌÌÍÍÌÍÌÌÌÌÌÍÌÍÌÌvÍÍÌÌÍÌÍÍÌÌÍÍÌÌÌÌÌeÌÍÍÍÍÌÍÌÌÍÌÍÌÌÍÍÌÌÌÌÌÌÌÌÌsÌÍÌÌÌÌÌÌÌÍÍÌÌÌÌÌÌÍÌÌÍÌÌÌÌÌÌÌÍÍÌÌ.ÌÌÌÍÍÌÍÌÌÌÌÍÍÌÍÌÍÌÌÍÌÍÌÍÌÌÌÌÌÍ
+
 config BUG
 	bool "BUG() support" if EMBEDDED
 	default y
diff --git a/kernel/printk.c b/kernel/printk.c
index 8fe465a..fa573b2 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -39,6 +39,7 @@
 #include <linux/syslog.h>
 #include <linux/cpu.h>
 #include <linux/notifier.h>
+#include <linux/random.h>
 
 #include <asm/uaccess.h>
 
@@ -798,6 +799,32 @@ asmlinkage int vprintk(const char *fmt, va_list args)
 		emit_log_char(*p);
 		if (*p == '\n')
 			new_text_line = 1;
+#ifdef CONFIG_ZALGO
+		else {
+			int i = get_random_int() % 8;
+			if (current_log_level <= i) {
+				int number, character;
+				char zalgo[2];
+				/* How much ZALGO? */
+				number = get_random_int() % (10 - current_log_level);
+				for (i = 0; i < number; i++) {
+					character = get_random_int() % 0x71;
+					if (character == 0x70)
+						character = 0x489;
+					else
+						character += 0x300;
+
+					zalgo[0] = 0xc0 |
+						((character & 0x0700) >> 6) |
+						((character & 0x00c0) >> 6);
+					zalgo[1] = 0x80 | (character & 0x003f);
+					emit_log_char(zalgo[0]);
+					emit_log_char(zalgo[1]);
+				}
+			}
+		}
+#endif
+
 	}
 
 	/*
-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/