[PATCH 07/29] staging: lustre: libcfs: test if data is NULL

[James Simmons]

From: Liang Zhen <liang.zhen@xxxxxxxxx>

Make sure data is not NULL otherwise we get an oops
when using the IOC_LIBCFS_MARK_DEBUG ioctl.

Signed-off-by: Liang Zhen <liang.zhen@xxxxxxxxx>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5435
Reviewed-on: http://review.whamcloud.com/11313
Reviewed-by: Bobi Jam <bobijam@xxxxxxxxx>
Reviewed-by: Johann Lombardi <johann.lombardi@xxxxxxxxx>
Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx>
---
 drivers/staging/lustre/lnet/libcfs/module.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/staging/lustre/lnet/libcfs/module.c b/drivers/staging/lustre/lnet/libcfs/module.c
index 4c3fe87..cce6ce3 100644
--- a/drivers/staging/lustre/lnet/libcfs/module.c
+++ b/drivers/staging/lustre/lnet/libcfs/module.c
@@ -150,7 +150,7 @@ static int libcfs_ioctl(struct cfs_psdev_file *pfile, unsigned long cmd,
 	 * Handled in arch/cfs_module.c
 	 */
 	case IOC_LIBCFS_MARK_DEBUG:
-		if (!data->ioc_inlbuf1 ||
+		if (!data || !data->ioc_inlbuf1 ||
 		    data->ioc_inlbuf1[data->ioc_inllen1 - 1] != '\0') {
 			err = -EINVAL;
 			goto out;
-- 
1.7.1