[PATCH 10/11] android: staging: ram_console: fix crash in ram_console_late_init

[John Stultz]

From: Colin Cross <ccross@xxxxxxxxxxx>

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: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
CC: Android Kernel Team <kernel-team@xxxxxxxxxxx>
Signed-off-by: Colin Cross <ccross@xxxxxxxxxxx>
Signed-off-by: John Stultz <john.stultz@xxxxxxxxxx>
---
 drivers/staging/android/ram_console.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/android/ram_console.c b/drivers/staging/android/ram_console.c
index 29d347e..d956b84 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;
 
-- 
1.7.3.2.146.gca209

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