From: Arve Hjønnevåg <arve@android.com>
Date: Sat, 31 Jan 2009 04:21:09 +0000 (-0800)
Subject: Staging: android: ram_console: Disable ECC when early init is enabled and validate... 
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=5701c0519b7a357a602fda5c96f26197ecfc4c85;p=linux-2.6-omap-h63xx.git

Staging: android: ram_console: Disable ECC when early init is enabled and validate buffer size

Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig
index 6b996db0dd6..604bd1e0d54 100644
--- a/drivers/staging/android/Kconfig
+++ b/drivers/staging/android/Kconfig
@@ -27,6 +27,7 @@ menuconfig ANDROID_RAM_CONSOLE_ERROR_CORRECTION
 	bool "Android RAM Console Enable error correction"
 	default n
 	depends on ANDROID_RAM_CONSOLE
+	depends on !ANDROID_RAM_CONSOLE_EARLY_INIT
 	select REED_SOLOMON
 	select REED_SOLOMON_ENC8
 	select REED_SOLOMON_DEC8
diff --git a/drivers/staging/android/ram_console.c b/drivers/staging/android/ram_console.c
index bf006857a87..643ac5ce381 100644
--- a/drivers/staging/android/ram_console.c
+++ b/drivers/staging/android/ram_console.c
@@ -224,9 +224,23 @@ static int __init ram_console_init(struct ram_console_buffer *buffer,
 	ram_console_buffer_size =
 		buffer_size - sizeof(struct ram_console_buffer);
 
+	if (ram_console_buffer_size > buffer_size) {
+		pr_err("ram_console: buffer %p, invalid size %d, datasize %d\n",
+		       buffer, buffer_size, ram_console_buffer_size);
+		return 0;
+	}
+
 #ifdef CONFIG_ANDROID_RAM_CONSOLE_ERROR_CORRECTION
 	ram_console_buffer_size -= (DIV_ROUND_UP(ram_console_buffer_size,
 						ECC_BLOCK_SIZE) + 1) * ECC_SIZE;
+
+	if (ram_console_buffer_size > buffer_size) {
+		pr_err("ram_console: buffer %p, invalid size %d, "
+		       "non-ecc datasize %d\n",
+		       buffer, buffer_size, ram_console_buffer_size);
+		return 0;
+	}
+
 	ram_console_par_buffer = buffer->data + ram_console_buffer_size;