* [PATCH] ntb: fix possible NULL dereference
@ 2016-03-10 12:21 Sudip Mukherjee
2016-03-10 16:24 ` Jiang, Dave
0 siblings, 1 reply; 2+ messages in thread
From: Sudip Mukherjee @ 2016-03-10 12:21 UTC (permalink / raw)
To: Jon Mason, Dave Jiang, Allen Hubbe
Cc: linux-kernel, linux-ntb, Sudip Mukherjee
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>
---
drivers/ntb/test/ntb_perf.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/ntb/test/ntb_perf.c b/drivers/ntb/test/ntb_perf.c
index c8a37ba..b21e647 100644
--- a/drivers/ntb/test/ntb_perf.c
+++ b/drivers/ntb/test/ntb_perf.c
@@ -541,6 +541,8 @@ 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);
--
1.9.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ntb: fix possible NULL dereference
2016-03-10 12:21 [PATCH] ntb: fix possible NULL dereference Sudip Mukherjee
@ 2016-03-10 16:24 ` Jiang, Dave
0 siblings, 0 replies; 2+ messages in thread
From: Jiang, Dave @ 2016-03-10 16:24 UTC (permalink / raw)
To: Allen.Hubbe@emc.com, sudipm.mukherjee@gmail.com, jdmason@kudzu.us
Cc: linux-kernel@vger.kernel.org, linux-ntb@googlegroups.com
On Thu, 2016-03-10 at 17:51 +0530, Sudip Mukherjee wrote:
> 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>
Thanks!
> ---
> drivers/ntb/test/ntb_perf.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/ntb/test/ntb_perf.c
> b/drivers/ntb/test/ntb_perf.c
> index c8a37ba..b21e647 100644
> --- a/drivers/ntb/test/ntb_perf.c
> +++ b/drivers/ntb/test/ntb_perf.c
> @@ -541,6 +541,8 @@ 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);
^ permalink raw reply [flat|nested] 2+ messages in thread
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