From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Thu, 10 Mar 2016 12:21:11 +0000 (+0530)
Subject: ntb: fix possible NULL dereference
X-Git-Tag: v4.14-rc1~3521^2~4
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2572c7fb4e4b941af9a0206ac8093d362ae6d371;p=platform%2Fkernel%2Flinux-rpi.git

ntb: fix possible NULL dereference

kmalloc can fail and we should check for NULL before using the pointer
returned by kmalloc.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
---

diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index f798beb..cf19ff0 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -550,6 +550,8 @@ static ssize_t debugfs_run_read(struct file *filp, char __user *ubuf,
 		return 0;
 
 	buf = kmalloc(64, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
 	out_offset = snprintf(buf, 64, "%d\n", perf->run);
 	ret = simple_read_from_buffer(ubuf, count, offp, buf, out_offset);
 	kfree(buf);