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

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 6b996db..604bd1e 100644 (file)
--- 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 bf00685..643ac5c 100644 (file)
--- 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;