[112/152] n_gsm: gsm_data_alloc buffer allocation could fail and it is not being checked

Greg KH
2011-01-06T00:31:09Z

From: Ken Mills <ken.k.mills@intel.com>

commit 093d804611b9a38fe59753b37c29f840518406a9 upstream.

gsm_data_alloc buffer allocation could fail and it is not being checked.

Add check for allocated buffer and return if the buffer allocation
fails.

Signed-off-by: Ken Mills <ken.k.mills@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
drivers/char/n_gsm.c | 2 ++
1 file changed, 2 insertions(+)

--- a/drivers/char/n_gsm.c
+++ b/drivers/char/n_gsm.c
@@ -968,6 +968,8 @@ static void gsm_control_reply(struct gsm
{
struct gsm_msg *msg;
msg = gsm_data_alloc(gsm, 0, dlen + 2, gsm->ftype);
+ if (msg == NULL)
+ return;
msg->data[0] = (cmd & 0xFE) << 1 | EA; /* Clear C/R */
msg->data[1] = (dlen << 1) | EA;
memcpy(msg->data + 2, data, dlen);