From: Colin Cross <ccross@android.com>
Date: Thu, 8 Mar 2012 01:34:37 +0000 (-0800)
Subject: staging: android: ram_console: fix crash in ram_console_late_init
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=3a21138d3f76296ad070a3692d72eb529e7d5d2c;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

staging: android: ram_console: fix crash in ram_console_late_init

If the persistent ram buffer is not available, ram_console_late_init
would crash when dereferencing ram_console_zone.  Return early if
ram console was not initialized.

CC: Android Kernel Team <kernel-team@android.com>
Signed-off-by: Colin Cross <ccross@android.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/staging/android/ram_console.c b/drivers/staging/android/ram_console.c
index 29d347e802ed..d956b8441442 100644
--- a/drivers/staging/android/ram_console.c
+++ b/drivers/staging/android/ram_console.c
@@ -150,6 +150,9 @@ static int __init ram_console_late_init(void)
 	struct proc_dir_entry *entry;
 	struct persistent_ram_zone *prz = ram_console_zone;
 
+	if (!prz)
+		return 0;
+
 	if (persistent_ram_old_size(prz) == 0)
 		return 0;