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nl80211: Check for proper nlmsg allocation in send_and_recv_msgs_owner()

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When nlmsg allocation fails, nl80211_drv_msg() returns NULL and the call
to send_and_recv_msgs_owner() from nl80211_leave_ibss() could have ended
up dereferencing a NULL pointer. Fix this by make
send_and_recv_msgs_owner() more consistent with other send_and_recv*()
cases that check msg == NULL internally.

Fixes: 12ea7dee31 ("nl80211: Use nl80211 control port for receiving EAPOL frames")
Signed-off-by: Pooventhiran G <pooventh@codeaurora.org>
This commit is contained in:
Pooventhiran G 2020-10-27 11:54:21 +05:30 committed by Jouni Malinen
parent 02289ab537
commit 0577e8e679
1 changed files with 3 additions and 0 deletions
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3
src/drivers/driver_nl80211.c
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@ -502,6 +502,9 @@ static int send_and_recv_msgs_owner(struct wpa_driver_nl80211_data *drv,
void *), void *),
void *ack_data) void *ack_data)
{ {
if (!msg)
return -ENOMEM;
/* Control port over nl80211 needs the flags and attributes below. /* Control port over nl80211 needs the flags and attributes below.
* *
* The Linux kernel has initial checks for them (in nl80211.c) like: * The Linux kernel has initial checks for them (in nl80211.c) like: