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n_gsm: gsm_data_alloc buffer allocation could fail and it is not being checked 

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>
Cc: stable@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Ken Mills 2010-12-13 15:28:03 +00:00 committed by Greg Kroah-Hartman
parent be7a7411d6
commit 093d804611
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/n_gsm.c
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@ -968,6 +968,8 @@ static void gsm_control_reply(struct gsm_mux *gsm, int cmd, u8 *data,
{
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);