Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[linux-2.6-omap-h63xx.git] / drivers / staging / android / ram_console.c

diff --git a/drivers/staging/android/ram_console.c b/drivers/staging/android/ram_console.c
index bf006857a87ac803037d6d1cf527968035e48e8c..643ac5ce381d9baa4c1321478391a76d83383787 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;